MAX232, MAX232I
DUAL EIA-232 DRIVERS/RECEIVERS
SLLS047I FEBRUARY 1989 REVISED OCTOBER 2002
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Meet or Exceed TIA/EIA-232-F and ITU
Recommendation V.28
D
Operate With Single 5-V Power Supply
D
Operate Up to 120 kbit/s
D
Two Drivers and Two Receivers
D
30-V Input Levels
D
Low Supply Current . . . 8 mA Typical
D
Designed to be Interchangeable With
Maxim MAX232
D
ESD Protection Exceeds JESD 22
2000-V Human-Body Model (A114-A)
D
Applications
TIA/EIA-232-F
Battery-Powered Systems
Terminals
Modems
Computers
description/ordering information
The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply EIA-232 voltage
levels from a single 5-V supply. Each receiver converts EIA-232 inputs to 5-V TTL/CMOS levels. These
receivers have a typical threshold of 1.3 V and a typical hysteresis of 0.5 V, and can accept
30-V inputs. Each
driver converts TTL/CMOS input levels into EIA-232 levels. The driver, receiver, and voltage-generator
functions are available as cells in the Texas Instruments LinASIC
library.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP (N)
Tube
MAX232N
MAX232N
SOIC (D)
Tube
MAX232D
MAX232
0
C to 70
C
SOIC (D)
Tape and reel
MAX232DR
MAX232
0
C to 70
C
SOIC (DW)
Tube
MAX232DW
MAX232
SOIC (DW)
Tape and reel
MAX232DWR
MAX232
SOP (NS)
Tape and reel
MAX232NSR
MAX232
PDIP (N)
Tube
MAX232IN
MAX232IN
SOIC (D)
Tube
MAX232ID
MAX232I
40
C to 85
C
SOIC (D)
Tape and reel
MAX232IDR
MAX232I
SOIC (DW)
Tube
MAX232IDW
MAX232I
SOIC (DW)
Tape and reel
MAX232IDWR
MAX232I
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Copyright
2002, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
LinASIC is a trademark of Texas Instruments.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C1+
V
S+
C1
C2+
C2
V
S
T2OUT
R2IN
V
CC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
MAX232 . . . D, DW, N, OR NS PACKAGE
MAX232I . . . D, DW, OR N PACKAGE
(TOP VIEW)
MAX232, MAX232I
DUAL EIA-232 DRIVERS/RECEIVERS
SLLS047I FEBRUARY 1989 REVISED OCTOBER 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Function Tables
EACH DRIVER
INPUT
TIN
OUTPUT
TOUT
L
H
H
L
H = high level, L = low
level
EACH RECEIVER
INPUT
RIN
OUTPUT
ROUT
L
H
H
L
H = high level, L = low
level
logic diagram (positive logic)
T1IN
T1OUT
R1IN
R1OUT
T2IN
T2OUT
R2IN
R2OUT
11
10
12
9
14
7
13
8
MAX232, MAX232I
DUAL EIA-232 DRIVERS/RECEIVERS
SLLS047I FEBRUARY 1989 REVISED OCTOBER 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Input supply voltage range, V
CC
(see Note 1)
0.3 V to 6 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Positive output supply voltage range, V
S+
V
CC
0.3 V to 15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Negative output supply voltage range, V
S
0.3 V to 15 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
: Driver
0.3 V to
V
CC
+ 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Receiver
30 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
: T1OUT, T2OUT
V
S
0.3 V to V
S+
+ 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
R1OUT, R2OUT
0.3 V to V
CC
+ 0.3 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-circuit duration: T1OUT, T2OUT
Unlimited
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package thermal impedance,
JA
(see Note 2): D package
73
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
57
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
67
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
NS package
64
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
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 under "recommended operating conditions" is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network ground terminal.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
NOM
MAX
UNIT
VCC
Supply voltage
4.5
5
5.5
V
VIH
High-level input voltage (T1IN,T2IN)
2
V
VIL
Low-level input voltage (T1IN, T2IN)
0.8
V
R1IN, R2IN
Receiver input voltage
30
V
TA
Operating free air temperature
MAX232
0
70
C
TA
Operating free-air temperature
MAX232I
40
85
C
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 3 and Figure 4)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
ICC
Supply current
VCC = 5.5 V,
TA = 25
C
All outputs open,
8
10
mA
All typical values are at VCC = 5 V and TA = 25
C.
NOTE 3: Test conditions are C1C4 = 1
F at VCC = 5 V
0.5 V.
MAX232, MAX232I
DUAL EIA-232 DRIVERS/RECEIVERS
SLLS047I FEBRUARY 1989 REVISED OCTOBER 2002
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (see Note 3)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output voltage
T1OUT, T2OUT
RL = 3 k
to GND
5
7
V
VOL
Low-level output voltage
T1OUT, T2OUT
RL = 3 k
to GND
7
5
V
ro
Output resistance
T1OUT, T2OUT
VS+ = VS = 0,
VO =
2 V
300
IOS
Short-circuit output current
T1OUT, T2OUT
VCC = 5.5 V,
VO = 0
10
mA
IIS
Short-circuit input current
T1IN, T2IN
VI = 0
200
A
All typical values are at VCC = 5 V, TA = 25
C.
The algebraic convention, in which the least positive (most negative) value is designated minimum, is used in this data sheet for logic voltage
levels only.
Not more than one output should be shorted at a time.
NOTE 3: Test conditions are C1C4 = 1
F at VCC = 5 V
0.5 V.
switching characteristics, V
CC
= 5 V, T
A
= 25
C (see Note 3)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SR
Driver slew rate
RL = 3 k
to 7 k
,
See Figure 2
30
V
/
s
SR(t)
Driver transition region slew rate
See Figure 3
3
V
/
s
Data rate
One TOUT switching
120
kbit/s
NOTE 3: Test conditions are C1C4 = 1
F at VCC = 5 V
0.5 V.
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (see Note 3)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output voltage
R1OUT, R2OUT
IOH = 1 mA
3.5
V
VOL
Low-level output voltage
R1OUT, R2OUT
IOL = 3.2 mA
0.4
V
VIT+
Receiver positive-going input
threshold voltage
R1IN, R2IN
VCC = 5 V,
TA = 25
C
1.7
2.4
V
VIT
Receiver negative-going input
threshold voltage
R1IN, R2IN
VCC = 5 V,
TA = 25
C
0.8
1.2
V
Vhys
Input hysteresis voltage
R1IN, R2IN
VCC = 5 V
0.2
0.5
1
V
ri
Receiver input resistance
R1IN, R2IN
VCC = 5,
TA = 25
C
3
5
7
k
All typical values are at VCC = 5 V, TA = 25
C.
The algebraic convention, in which the least positive (most negative) value is designated minimum, is used in this data sheet for logic voltage
levels only.
NOTE 3: Test conditions are C1C4 = 1
F at VCC = 5 V
0.5 V.
switching characteristics, V
CC
= 5 V, T
A
= 25
C (see Note 3 and Figure 1)
PARAMETER
TYP
UNIT
tPLH(R)
Receiver propagation delay time, low- to high-level output
500
ns
tPHL(R)
Receiver propagation delay time, high- to low-level output
500
ns
NOTE 3: Test conditions are C1C4 = 1
F at VCC = 5 V
0.5 V.
MAX232, MAX232I
DUAL EIA-232 DRIVERS/RECEIVERS
SLLS047I FEBRUARY 1989 REVISED OCTOBER 2002
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
10 ns
VCC
R1IN
or
R2IN
R1OUT
or
R2OUT
RL = 1.3 k
See Note C
CL = 50 pF
(see Note B)
TEST CIRCUIT
10 ns
Input
Output
tPHL
tPLH
1.5 V
VOL
VOH
0 V
3 V
10%
90%
50%
500 ns
WAVEFORMS
1.5 V
90%
50%
10%
NOTES: A. The pulse generator has the following characteristics: ZO = 50
, duty cycle
50%.
B. CL includes probe and jig capacitance.
C. All diodes are 1N3064 or equivalent.
Pulse
Generator
(see Note A)
Figure 1. Receiver Test Circuit and Waveforms for t
PHL
and t
PLH
Measurements
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