第1页 / 共36页
第2页 / 共36页
第3页 / 共36页
第4页 / 共36页
第5页 / 共36页
第6页 / 共36页
第7页 / 共36页
第8页 / 共36页
MAX220-MAX249.pdf
19-4323; Rev 15; 1/06
+5V-Powered, Multichannel RS-232
Drivers/Receivers
General Description
The MAX220–MAX249 family of line drivers/receivers is
intended for all EIA/TIA-232E and V.28/V.24 communica-
tions interfaces, particularly applications where ±12V is
not available.
These parts are especially useful in battery-powered sys-
tems, since their low-power shutdown mode reduces
power dissipation to less than 5µW. The MAX225,
MAX233, MAX235, and MAX245/MAX246/MAX247 use
no external components and are recommended for appli-
cations where printed circuit board space is critical.
________________________Applications
Next-Generation
Device Features
♦ For Low-Voltage, Integrated ESD Applications
MAX3222E/MAX3232E/MAX3237E/MAX3241E/
MAX3246E: +3.0V to +5.5V, Low-Power, Up to
1Mbps, True RS-232 Transceivers Using Four
0.1µF External Capacitors (MAX3246E Available
in a UCSP™ Package)
♦ For Low-Cost Applications
MAX221E: ±15kV ESD-Protected, +5V, 1µA,
Single RS-232 Transceiver with AutoShutdown™
Ordering Information
Portable Computers
Low-Power Modems
Interface Translation
Battery-Powered RS-232 Systems
Multidrop RS-232 Networks
AutoShutdown and UCSP are trademarks of Maxim Integrated
Products, Inc.
PART
PIN-PACKAGE
MAX220CPE
16 Plastic DIP
16 Narrow SO
MAX220CSE
16 Wide SO
MAX220CWE
Dice*
MAX220C/D
16 Plastic DIP
MAX220EPE
16 Narrow SO
MAX220ESE
16 Wide SO
MAX220EWE
16 CERDIP
MAX220EJE
MAX220MJE
16 CERDIP
Ordering Information continued at end of data sheet.
*Contact factory for dice specifications.
TEMP RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-55°C to +125°C
Selection Table
M
A
X
2
2
0
–
M
A
X
2
4
9
Nominal
Cap. Value & Three- Active in Data Rate
SHDN
Rx
Power
Part
Supply
Number
(V)
MAX220
+5
MAX222
+5
MAX223 (MAX213) +5
MAX225
+5
MAX230 (MAX200) +5
MAX231 (MAX201) +5 and
MAX232 (MAX202) +5
MAX232A
+5
MAX233 (MAX203) +5
MAX233A
+5
MAX234 (MAX204) +5
MAX235 (MAX205) +5
MAX236 (MAX206) +5
MAX237 (MAX207) +5
MAX238 (MAX208) +5
MAX239 (MAX209) +5 and
+7.5 to +13.2
+7.5 to +13.2
MAX240
+5
MAX241 (MAX211) +5
+5
MAX242
+5
MAX243
+5
MAX244
+5
MAX245
+5
MAX246
MAX247
+5
+5
MAX248
MAX249
+5
No. of
No. of
RS-232
Drivers/Rx Ext. Caps (µF)
2/2
2/2
4/5
5/5
5/0
2/2
4
4
4
0
4
2
0.047/0.33 No
0.1
Yes
Yes
1.0 (0.1)
Yes
—
Yes
1.0 (0.1)
1.0 (0.1)
No
State
2/2
2/2
2/2
2/2
4/0
5/5
4/3
5/3
4/4
3/5
5/5
4/5
2/2
2/2
8/10
8/10
8/10
8/9
8/8
6/10
4
4
0
0
4
0
4
4
4
2
4
4
4
4
4
0
0
0
4
4
1.0 (0.1)
0.1
—
—
1.0 (0.1)
—
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0 (0.1)
1.0
1.0 (0.1)
0.1
0.1
1.0
—
—
—
1.0
1.0
No
No
No
No
No
Yes
Yes
No
No
No
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
SHDN
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
(kbps)
120
200
120
120
120
120
120 (64)
200
120
200
120
120
120
120
120
120
120
120
200
200
120
120
120
120
120
120
Features
Ultra-low-power, industry-standard pinout
Low-power shutdown
MAX241 and receivers active in shutdown
Available in SO
5 drivers with shutdown
Standard +5/+12V or battery supplies;
same functions as MAX232
Industry standard
Higher slew rate, small caps
No external caps
No external caps, high slew rate
Replaces 1488
No external caps
Shutdown, three state
Complements IBM PC serial port
Replaces 1488 and 1489
Standard +5/+12V or battery supplies;
single-package solution for IBM PC serial port
DIP or flatpack package
Complete IBM PC serial port
Separate shutdown and enable
Open-line detection simplifies cabling
High slew rate
High slew rate, int. caps, two shutdown modes
High slew rate, int. caps, three shutdown modes
High slew rate, int. caps, nine operating modes
High slew rate, selective half-chip enables
Available in quad flatpack package
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
✔
✔
✔
✔
✔
✔
✔
✔
9
4
2
X
A
M
–
0
2
2
X
A
M
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243
Supply Voltage (VCC) ...............................................-0.3V to +6V
V+ (Note 1) ..................................................(VCC - 0.3V) to +14V
V- (Note 1) .............................................................+0.3V to +14V
Input Voltages
TIN..............................................................-0.3V to (VCC - 0.3V)
RIN (Except MAX220) ........................................................±30V
RIN (MAX220).....................................................................±25V
TOUT (Except MAX220) (Note 2) .......................................±15V
TOUT (MAX220)...............................................................±13.2V
Output Voltages
TOUT...................................................................................±15V
ROUT.........................................................-0.3V to (VCC + 0.3V)
Driver/Receiver Output Short Circuited to GND.........Continuous
Continuous Power Dissipation (TA = +70°C)
18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)..889mW
20-Pin Plastic DIP (derate 8.00mW/°C above +70°C) ..440mW
16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW
20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW
20-Pin SSOP (derate 8.00mW/°C above +70°C) ..........640mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW
18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW
MAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C
MAX2_ _AE_ _, MAX2_ _E_ _ ..........................-40°C to +85°C
MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) (Note 3) ...................+300°C
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)..842mW
Operating Temperature Ranges
Note 1: For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.
Note 2: Input voltage measured with TOUT in high-impedance state, SHDN or VCC = 0V.
Note 3: Maximum reflow temperature for the MAX233A is +225°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.)
MAX
PARAMETER
CONDITIONS
UNITS
MIN
TYP
RS-232 TRANSMITTERS
Output Voltage Swing
Input Logic Threshold Low
Input Logic Threshold High
Logic Pullup/lnput Current
Output Leakage Current
Data Rate
Transmitter Output Resistance
Output Short-Circuit Current
RS-232 RECEIVERS
All transmitter outputs loaded with 3kΩ to GND
All devices except MAX220
MAX220: VCC = 5.0V
All except MAX220, normal operation
SHDN = 0V, MAX222/MAX242, shutdown,
MAX220
VCC = 5.5V, SHDN = 0V, VOUT = ±15V,
MAX222/MAX242
VCC = SHDN = 0V
VOUT = ±15V
MAX220, VOUT = ±12V
VCC = V+ = V- = 0V, VOUT = ±2V
VOUT = 0V
MAX220
VOUT = 0V
RS-232 Input Voltage Operating Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
VCC = 5V
VCC = 5V
MAX220
All except MAX243 R2IN
MAX243 R2IN (Note 4)
All except MAX243 R2IN
MAX243 R2IN (Note 4)
±5
2
2.4
300
±7
0.8
-3
±8
1.4
1.4
5
±0.01
±0.01
±0.01
200
10M
±22
1.3
1.8
-0.5
0.8
40
±1
±10
±10
±25
116
±60
±30
±25
2.4
-0.1
V
V
V
µA
µA
kbps
Ω
mA
V
V
V
2
_______________________________________________________________________________________
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RS-232 Input Hysteresis
All except MAX220/MAX243, VCC = 5V, no
hysteresis in SHDN
MAX220
MAX243
RS-232 Input Resistance
TA = +25°C (MAX220)
M
A
X
2
2
0
–
M
A
X
2
4
9
0.2
3
3
3.5
-2
10
2.0
4.5
2.0
6
0.5
0.3
1
5
5
0.2
VCC - 0.2
-10
30
±0.05
1.4
1.4
0.5
4
12
15
0.1
2
2
35
1.4
1.4
12
1.0
7
7
0.4
0.4
±10
0.8
5.5
2
10
10
50
50
100
±1
0.8
30
V
kΩ
V
V
mA
µA
V
V
V
µA
µA
µA
V
V
V/µs
µs
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
EN Input Threshold Low
EN Input Threshold High
Operating Supply Voltage
VCC Supply Current (SHDN = VCC),
Figures 5, 6, 11, 19
Shutdown Supply Current
SHDN Input Leakage Current
SHDN Threshold Low
SHDN Threshold High
Transition Slew Rate
Transmitter Propagation Delay TLL to
RS-232 (Normal Operation), Figure 1
IOUT = 3.2mA
IOUT = 1.6mA (MAX220)
IOUT = -1.0mA
Sourcing VOUT = GND
Shrinking VOUT = VCC
SHDN = VCC or EN = VCC (SHDN = 0V for
MAX222), 0V ≤ VOUT ≤ VCC
MAX242
MAX242
No load
3kΩ load both
inputs
MAX222/
MAX242
MAX220
MAX222/MAX232A/MAX233A/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233A/
MAX242/MAX243
TA = +25°C
TA = 0°C to +70°C
TA = -40°C to +85°C
TA = -55°C to +125°C
MAX222/MAX242
MAX222/MAX242
MAX222/MAX242
CL = 50pF to
2500pF, RL = 3kΩ
to 7kΩ, VCC = 5V,
TA = +25°C,
measured from
+3V to -3V or -3V
tPHLT
tPLHT
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
1.5
3
30.0
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
1.3
4
1.5
5
3.5
10
3.5
10
Note 4: MAX243 R2OUT is guaranteed to be low when R2IN is ≥ 0V or is floating.
_______________________________________________________________________________________ 3
9
4
2
X
A
M
–
0
2
2
X
A
M
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)
(VCC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, TA = TMIN to TMAX‚ unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Receiver Propagation Delay RS-232 to
TLL (Normal Operation), Figure 2
Receiver Propagation Delay RS-232 to
TLL (Shutdown), Figure 2
Receiver-Output Enable Time, Figure 3
Receiver-Output Disable Time, Figure 3
Transmitter-Output Enable Time (SHDN
Goes High), Figure 4
Transmitter-Output Disable Time (SHDN
Goes Low), Figure 4
tPHLR
tPLHR
tPHLS
tPHLS
tER
tDR
tET
tDT
Transmitter + to - Propagation Delay
Difference (Normal Operation)
tPHLT - tPLHT
Receiver + to - Propagation Delay
Difference (Normal Operation)
tPHLR - tPLHR
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX242
MAX242
MAX242
MAX242
MAX222/MAX242, 0.1µF
caps (includes charge-pump
start-up)
MAX222/MAX242,
0.1µF caps
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
MAX222/MAX232A/MAX233/
MAX242/MAX243
MAX220
1
3
1
3
10
10
500
500
0.5
0.6
0.6
0.8
0.5
2.5
125
160
250
600
300
2000
100
225
µs
µs
ns
ns
µs
ns
ns
ns
__________________________________________Typical Operating Characteristics
MAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243
10
8
6
4
2
0
-2
-4
-6
-8
-10
OUTPUT VOLTAGE vs. LOAD CURRENT
1μF
1
0
-
0
2
2
X
A
M
0.1μF
EITHER V+ OR V- LOADED
VCC = ±5V
NO LOAD ON
TRANSMITTER OUTPUTS
(EXCEPT MAX220, MAX233A)
V- LOADED, NO LOAD ON V+
0.1μF
1μF
V+ LOADED, NO LOAD ON V-
0
5
10
15
20
25
)
A
m
(
T
N
E
R
R
U
C
T
U
P
T
U
O
11
10
9
8
7
6
5
4
LOAD CURRENT (mA)
)
V
(
E
G
A
T
L
O
V
T
U
P
T
U
O
4
_______________________________________________________________________________________
0
10
30
40
20
DATA RATE (kb/s)
V-
-10V
50
60
AVAILABLE OUTPUT CURRENT
vs. DATA RATE
OUTPUT LOAD CURRENT
FLOWS FROM V+ TO V-
2
0
-
0
2
2
X
A
M
ALL CAPS
1μF
ALL CAPS
0.1μF
VCC = +5.25V
VCC = +4.75V
+10V
+5V
+5V
0V
0V
)
V
(
E
G
A
T
L
O
V
-
V
,
+
V
MAX222/MAX242
ON-TIME EXITING SHUTDOWN
1μF CAPS
V+
V+
0.1μF CAPS
SHDN
3
0
-
0
2
2
X
A
M
1μF CAPS
0.1μF CAPS
500μs/div
V-
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241
VCC...........................................................................-0.3V to +6V
V+ ................................................................(VCC - 0.3V) to +14V
V- ............................................................................+0.3V to -14V
Input Voltages
TIN ............................................................-0.3V to (VCC + 0.3V)
RIN......................................................................................±30V
Output Voltages
TOUT ...................................................(V+ + 0.3V) to (V- - 0.3V)
ROUT.........................................................-0.3V to (VCC + 0.3V)
Short-Circuit Duration, TOUT ......................................Continuous
Continuous Power Dissipation (TA = +70°C)
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW
16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW
20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW
24-Pin Narrow Plastic DIP
20-Pin Wide SO (derate 10.00mW/°C above +70°C).......800mW
24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
44-Pin Plastic FP (derate 11.11mW/°C above +70°C) .....889mW
14-Pin CERDIP (derate 9.09mW/°C above +70°C) ..........727mW
16-Pin CERDIP (derate 10.00mW/°C above +70°C) ........800mW
20-Pin CERDIP (derate 11.11mW/°C above +70°C) ........889mW
24-Pin Narrow CERDIP
(derate 12.50mW/°C above +70°C) ..............1W
24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W
28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW
Operating Temperature Ranges
MAX2 _ _ C _ _......................................................0°C to +70°C
MAX2 _ _ E _ _...................................................-40°C to +85°C
MAX2 _ _ M _ _......................................................-55°C to +125°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10s) (Note 4) ...................+300°C
(derate 13.33mW/°C above +70°C) ..........1.07W
24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW
16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW
Note 4: Maximum reflow temperature for the MAX233/MAX235 is +225°C.
M
A
X
2
2
0
–
M
A
X
2
4
9
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241
(MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, VCC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
Output Voltage Swing
All transmitter outputs loaded with 3kΩ to ground
CONDITIONS
MIN
±5.0
MAX
UNITS
TYP
±7.3
5
7
0.4
1.8
5
15
1
10
15
1
5
15
50
10
0.8
2.0
2.4
-30
1.5
200
+30
VCC Power-Supply Current
No load,
TA = +25°C
V+ Power-Supply Current
Shutdown Supply Current
TA = +25°C
MAX232/233
MAX223/230/234–238/240/241
MAX231/239
MAX231
MAX239
MAX223
MAX230/235/236/240/241
Input Logic Threshold Low
Input Logic Threshold High
Logic Pullup Current
Receiver Input Voltage
Operating Range
TIN; EN, SHDN (MAX233); EN, SHDN (MAX230/235–241)
TIN
EN, SHDN (MAX223);
EN, SHDN (MAX230/235/236/240/241)
TIN = 0V
V
mA
mA
µA
V
V
µA
V
_______________________________________________________________________________________ 5
+5V-Powered, Multichannel RS-232
Drivers/Receivers
ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)
(MAX223/230/232/234/236/237/238/240/241, VCC = +5V ±10; MAX233/MAX235, VCC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,
VCC = 5V ±10%; V+ = 7.5V to 13.2V; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
CONDITIONS
Normal operation
MIN
TYP
MAX UNITS
RS-232 Input Threshold Low
TA = +25°C,
VCC = 5V
RS-232 Input Threshold High
TA = +25°C,
VCC = 5V
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
0.8
1.2
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4IN, R5IN)
Normal operation
0.6
1.5
SHDN = 5V (MAX223)
SHDN = 0V (MAX235/236/240/241)
1.7
2.4
Shutdown (MAX223)
SHDN = 0V,
EN = 5V (R4IN‚ R5IN)
9
4
2
X
A
M
–
0
2
2
X
A
M
V
V
V
kΩ
V
V
µA
ns
ns
µs
V/µs
Ω
mA
mA
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Leakage Current
Receiver Output Enable Time
Receiver Output Disable Time
Propagation Delay
Transition Region Slew Rate
Transmitter Output Resistance
Transmitter Output Short-Circuit
Current
VCC = 5V, no hysteresis in shutdown
TA = +25°C, VCC = 5V
IOUT = 1.6mA (MAX231/232/233, IOUT = 3.2mA)
IOUT = -1mA
0V ≤ ROUT ≤ VCC; EN = 0V (MAX223);
EN = VCC (MAX235–241 )
MAX223
MAX235/236/239/240/241
MAX223
MAX235/236/239/240/241
Normal operation
Normal
operation
SHDN = 0V
(MAX223)
tPHLS
tPLHS
Normal
operation
RS-232 IN to
TTL/CMOS OUT,
CL = 150pF
MAX223/MAX230/MAX234–241, TA = +25°C, VCC = 5V,
RL = 3kΩ to 7kΩ‚ CL = 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
MAX231/MAX232/MAX233, TA = +25°C, VCC = 5V,
RL = 3kΩ to 7kΩ, CL = 50pF to 2500pF, measured from
+3V to -3V or -3V to +3V
VCC = V+ = V- = 0V, VOUT = ±2V
3
300
1.5
0.5
5
0.2
3
2.4
1.0
7
0.4
3.5
VCC - 0.4
0.05
±10
600
400
900
250
0.5
4
6
5.1
4
±10
10
40
40
30
30
6
_______________________________________________________________________________________
+5V-Powered, Multichannel RS-232
Drivers/Receivers
__________________________________________Typical Operating Characteristics
)
V
(
H
O
V
)
V
(
L
O
V
8.5
8.0
7.5
7.0
6.5
-6.0
-6.5
-7.0
-7.5
-8.0
-8.5
-9.0
TRANSMITTER OUTPUT
VOLTAGE (VOH) vs. VCC
2 TRANSMITTERS
LOADED
4
0
-
0
2
2
X
A
M
1 TRANSMITTER
LOADED
4.5
4 TRANSMITTERS
LOADED
5.0
VCC (V)
3 TRANS-
MITTERS
LOADED
TA = +25°C
C1–C4 = 1μF
TRANSMITTER
LOADS =
3kΩ || 2500pF
5.5
TRANSMITTER OUTPUT
VOLTAGE (VOL) vs. VCC
4 TRANS-
MITTERS
LOADED
7
0
-
0
2
2
X
A
M
TA = +25°C
C1–C4 = 1μF
TRANSMITTER
LOADS =
3kΩ || 2500pF
1 TRANS-
MITTER
LOADED
2 TRANS-
MITTERS
LOADED
4.5
3 TRANS-
MITTERS
LOADED
5.0
VCC (V)
5.5
MAX223/MAX230–MAX241
TRANSMITTER OUTPUT VOLTAGE (VOH)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
)
V
(
H
O
V
)
V
(
L
O
V
7.4
7.2
7.0
6.8
6.6
6.4
6.2
6.0
-6.0
-6.2
-6.4
-6.6
-6.8
-7.0
-7.2
-7.4
-7.6
5
0
-
0
2
2
X
A
M
)
s
μ
/
V
(
E
T
A
R
W
E
L
S
160kb/s
80kb/s
20kb/s
TA = +25°C
VCC = +5V
3 TRANSMITTERS LOADED
RL = 3kΩ
C1–C4 = 1μF
0
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (VOL)
vs. LOAD CAPACITANCE AT
DIFFERENT DATA RATES
TA = +25°C
VCC = +5V
3 TRANSMITTERS LOADED
RL = 3kΩ
C1–C4 = 1μF
160kb/s
80kb/s
20kb/s
8
0
-
0
2
2
X
A
M
)
V
(
-
V
,
+
V
0
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
12.0
11.0
10.0
9.0
8.0
7.0
6.0
5.0
4.0
10
8
6
4
2
0
-2
-4
-6
-8
-10
TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE
1 TRANSMITTER LOADED
6
0
-
0
2
2
X
A
M
TA = +25°C
VCC = +5V
LOADED, RL = 3kΩ
C1–C4 = 1μF
2 TRANSMITTERS
LOADED
3 TRANSMITTERS
LOADED
4 TRANSMITTERS
LOADED
0
500
1000
1500
2000
2500
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V+, V-)
vs. LOAD CURRENT
9
0
-
0
2
2
X
A
M
TA = +25°C
VCC = +5V
C1–C4 = 1μF
V+ AND V-
EQUALLY
LOADED
V- LOADED,
NO LOAD
ON V+
V+ LOADED,
NO LOAD
ON V-
0
5
10
15
ALL TRANSMITTERS UNLOADED
20
30
CURRENT (mA)
25
35
40
45 50
M
A
X
2
2
0
–
M
A
X
2
4
9
V+, V- WHEN EXITING SHUTDOWN
(1μF CAPACITORS)
MAX220-13
V+
O
V-
SHDN*
_______________________________________________________________________________________
*SHUTDOWN POLARITY IS REVERSED
FOR NON MAX241 PARTS
7
500ms/div
+5V-Powered, Multichannel RS-232
Drivers/Receivers
9
4
2
X
A
M
–
0
2
2
X
A
M
Continuous Power Dissipation (TA = +70°C)
28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W
40-Pin Plastic DIP (derate 11.11mW/°C above +70°C) ...611mW
44-Pin PLCC (derate 13.33mW/°C above +70°C) ...........1.07W
Operating Temperature Ranges
MAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C
MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering,10s) (Note 6) ....................+300°C
ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249
Supply Voltage (VCC) ...............................................-0.3V to +6V
Input Voltages
TIN‚ ENA, ENB, ENR, ENT, ENRA,
ENRB, ENTA, ENTB..................................-0.3V to (VCC + 0.3V)
RIN .....................................................................................±25V
TOUT (Note 5).....................................................................±15V
ROUT ........................................................-0.3V to (VCC + 0.3V)
Short Circuit (one output at a time)
TOUT to GND ............................................................Continuous
ROUT to GND............................................................Continuous
Note 5: Input voltage measured with transmitter output in a high-impedance state, shutdown, or VCC = 0V.
Note 6: Maximum reflow temperature for the MAX225/MAX245/MAX246/MAX247 is +225°C.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249
(MAX225, VCC = 5.0V ±5%; MAX244–MAX249, VCC = +5.0V ±10%, external capacitors C1–C4 = 1µF; TA = TMIN to TMAX; unless oth-
erwise noted.)
CONDITIONS
MIN
TYP
MAX
UNITS
PARAMETER
RS-232 TRANSMITTERS
Input Logic Threshold Low
Input Logic Threshold High
2
±5
1.4
1.4
10
±0.01
120
±7.5
0.8
50
±1
64
±0.01
±25
±0.01
±25
±25
2.4
1.0
7
0.4
0.8
0.2
3
3.5
-2
10
1.3
1.8
0.5
5
0.2
VCC - 0.2
-10
30
V
V
µA
kbps
V
µA
Ω
mA
V
V
V
V
kΩ
V
V
mA
±0.05
±0.10
µA
Logic Pullup/lnput Current
Tables 1a–1d
Normal operation
Shutdown
Data Rate
Output Voltage Swing
Tables 1a–1d, normal operation
All transmitter outputs loaded with 3kΩ to GND
Output Leakage Current (Shutdown)
Tables 1a–1d
ENA, ENB, ENT, ENTA, ENTB =
VCC, VOUT = ±15V
VCC = 0V,
VOUT = ±15V
Transmitter Output Resistance
Output Short-Circuit Current
RS-232 RECEIVERS
RS-232 Input Voltage Operating Range
RS-232 Input Threshold Low
RS-232 Input Threshold High
RS-232 Input Hysteresis
RS-232 Input Resistance
TTL/CMOS Output Voltage Low
TTL/CMOS Output Voltage High
TTL/CMOS Output Short-Circuit Current
TTL/CMOS Output Leakage Current
VCC = 5V
VCC = 5V
VCC = 5V
IOUT = 3.2mA
IOUT = -1.0mA
Sourcing VOUT = GND
Shrinking VOUT = VCC
Normal operation, outputs disabled,
Tables 1a–1d, 0V ≤ VOUT ≤ VCC, ENR_ = VCC
VCC = V+ = V- = 0V, VOUT = ±2V (Note 7)
VOUT = 0V
300
±7
10M
±30
8
_______________________________________________________________________________________
相关推荐
V2版本原理图(Capacitive-Fingerprint-Reader-Schematic_V2).pdf
摄像头工作原理.doc
VL53L0X简要说明(En.FLVL53L00216).pdf
原理图(DVK720-Schematic).pdf
原理图(Pico-Clock-Green-Schdoc).pdf
原理图(RS485-CAN-HAT-B-schematic).pdf
File:SIM7500_SIM7600_SIM7800 Series_SSL_Application Note_V2.00.pdf
ADS1263(Ads1262).pdf
原理图(Open429Z-D-Schematic).pdf
用户手册(Capacitive_Fingerprint_Reader_User_Manual_CN).pdf
CY7C68013A（英文版）(CY7C68013A).pdf
TechnicalReference_Dem.pdf
