logic symbol
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC
Publication 617-12.
2VCC 1.5 V
2VCC + 1.5 V
2
6
14
7
13
8
C1+
C1
C2+
C2
1
3
4
5
11
10
12
9
GND
15
0 V
VCC
16
VCC
C1+
C1
C2 +
C2
T1IN
T2IN
R1OUT
R2OUT
T1OUT
T2OUT
R1IN
R2IN
VS+
VS
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G FEBRUARY 1989 REVISED AUGUST 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D
Operates With Single 5-V Power Supply
D
LinBiCMOS
TM
Process Technology
D
Two Drivers and Two Receivers
D
30-V Input Levels
D
Low Supply Current . . . 8 mA Typical
D
Meets or Exceeds TIA/EIA-232-F and ITU
Recommendation V.28
D
Designed to be Interchangeable With
Maxim MAX232
D
Applications
TIA/EIA-232-F
Battery-Powered Systems
Terminals
Modems
Computers
D
ESD Protection Exceeds 2000 V Per
MIL-STD-883, Method 3015
D
Package Options Include Plastic
Small-Outline (D, DW) Packages and
Standard Plastic (N) DIPs
description
The MAX232 device 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
TM
library.
The MAX232 is characterized for operation from
0
C to 70
C. The MAX232I is characterized for
operation from 40
C to 85
C.
AVAILABLE OPTIONS
PACKAGED DEVICES
TA
SMALL
OUTLINE
(D)
SMALL
OUTLINE
(DW)
PLASTIC DIP
(N)
0
C to 70
C
MAX232D
MAX232DW
MAX232N
40
C to 85
C
MAX232ID
MAX232IDW
MAX232IN
This device is available taped and reeled by adding an R to the part number (i.e., MAX232DR).
Copyright
1998, 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 and LinBiCMOS are trademarks of Texas Instruments Incorporated.
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
D, DW, OR N PACKAGE
(TOP VIEW)
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G FEBRUARY 1989 REVISED AUGUST 1998
2
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
113
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DW package
105
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
N package
78
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
65
C to 150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
260
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, except for through-hole packages, which use a trace length
of zero.
recommended operating conditions
MIN
NOM
MAX
UNIT
Supply voltage, VCC
4.5
5
5.5
V
High-level input voltage, VIH (T1IN,T2IN)
2
V
Low-level input voltage, VIL (T1IN, T2IN)
0.8
V
Receiver input voltage, R1IN, R2IN
30
V
Operating free air temperature TA
MAX232
0
70
C
Operating free-air temperature,TA
MAX232I
40
85
C
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G FEBRUARY 1989 REVISED AUGUST 1998
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VOH
High-level output voltage
T1OUT, T2OUT
RL = 3 k
to GND
5
7
V
VOH
High-level out ut voltage
R1OUT, R2OUT
IOH = 1 mA
3.5
V
VOL
Low level output voltage
T1OUT, T2OUT
RL = 3 k
to GND
7
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
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
ICC
Supply current
VCC = 5.5 V,
TA = 25
C
All outputs open,
8
10
mA
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.
switching characteristics, V
CC
= 5 V, T
A
= 25
C
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
tPLH(R)
Receiver propagation delay time, low- to high-level output
See Figure 1
500
ns
tPHL(R)
Receiver propagation delay time, high- to low-level output
See Figure 1
500
ns
SR
Driver slew rate
RL = 3 k
to 7 k
,
See Figure 2
30
V
/
s
SR(tr)
Driver transition region slew rate
See Figure 3
3
V
/
s
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G FEBRUARY 1989 REVISED AUGUST 1998
4
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
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G FEBRUARY 1989 REVISED AUGUST 1998
5
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PARAMETER MEASUREMENT INFORMATION
T1IN or T2IN
T1OUT or T2OUT
CL = 10 pF
(see Note B)
TEST CIRCUIT
10 ns
10 ns
Input
Output
tPHL
tPLH
VOL
VOH
0 V
3 V
10%
90%
50%
5
s
WAVEFORMS
90%
50%
10%
RL
90%
10%
90%
10%
tTLH
tTHL
EIA-232 Output
SR
+
0.8 (V
OH
V
OL
)
t
TLH
or
0.8 (V
OL
V
OH
)
t
THL
NOTES: A. The pulse generator has the following characteristics: ZO = 50
, duty cycle
50%.
B. CL includes probe and jig capacitance.
Pulse
Generator
(see Note A)
Figure 2. Driver Test Circuit and Waveforms for t
PHL
and t
PLH
Measurements (5-
s input)
EIA-232 Output
3 V
3 V
3 V
3 V
3 k
10%
1.5 V
90%
WAVEFORMS
20
s
1.5 V
90%
10%
VOH
VOL
tTLH
tTHL
10 ns
10 ns
TEST CIRCUIT
CL = 2.5 nF
Pulse
Generator
(see Note A)
Input
Output
SR
+
6 V
t
THL
or t
TLH
NOTE A: The pulse generator has the following characteristics: ZO = 50
, duty cycle
50%.
Figure 3. Test Circuit and Waveforms for t
THL
and t
TLH
Measurements (20-
s input)
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