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
V
CC
16
V
CC
C1+
C1–
C2+
C2–
T1IN
T2IN
R1OUT
R2OUT
T1OUT
T2OUT
R1IN
R2IN
V
S+
V
S–
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 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
T erminals
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 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
T
A
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, θ
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, V
CC
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
p
p
MAX232 0 70
°
Operating free-air temperature,T
A
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
p
T1OUT, T2OUT RL = 3 kΩ to GND
5
7
VOHHigh-level out ut voltage
R1OUT, R2OUT IOH = –1 mA 3.5
V
T1OUT, T2OUT RL = 3 kΩ to GND –7 –5
V
OL
L
ow-level output voltage
‡
R1OUT, R2OUT IOL = 3.2 mA 0.4
V
V
IT+
Receiver positive-going input
threshold voltage
R1IN, R2IN VCC = 5 V, TA = 25°C 1.7 2.4 V
V
IT–
Receiver negative-going input
threshold voltage
R1IN, R2IN VCC = 5 V, TA = 25°C 0.8 1.2 V
V
hys
Input hysteresis voltage R1IN, R2IN VCC = 5 V 0.2 0.5 1 V
r
i
Receiver input resistance R1IN, R2IN VCC = 5, TA = 25°C 3 5 7 kΩ
r
o
Output resistance T1OUT, T2OUT VS+ = VS– = 0, VO = ± 2 V 300 Ω
I
OS
§
Short-circuit output current T1OUT, T2OUT VCC = 5.5 V, VO = 0 ±10 mA
I
IS
Short-circuit input current T1IN, T2IN VI = 0 200 µA
I
CC
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, VCC = 5 V, TA = 25°C
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
t
PLH(R)
Receiver propagation delay time, low- to high-level output See Figure 1 500 ns
t
PHL(R)
Receiver propagation delay time, high- to low-level output See Figure 1 500 ns
SR Driver slew rate
RL = 3 kΩ to 7 kΩ,
See Figure 2
30 V/µs
SR(tr) Driver transition region slew rate See Figure 3 3 V/µs
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
V
CC
R1IN
or
R2IN
R1OUT
or
R2OUT
RL = 1.3 kΩ
See Note C
CL = 50 pF
(see Note B)
TEST CIRCUIT
≤ 10 ns
Input
Output
t
PHL
t
PLH
1.5 V
V
OL
V
OH
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 Ω, 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
t
PHL
t
PLH
V
OL
V
OH
0 V
3 V
10%
90%
50%
5 µs
WAVEFORMS
90%
50%
10%
R
L
90%
10%
90%
10%
t
TLH
t
THL
EIA-232 Output
SR
+
0.8 (VOH–VOL)
t
TLH
or
0.8 (VOL–VOH)
t
THL
NOTES: A. The pulse generator has the following characteristics: ZO = 50 Ω, 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-µs input)
EIA-232 Output
–3 V
3 V
–3 V
3 V
3 kΩ
10%
1.5 V
90%
WAVEFORMS
20 µs
1.5 V
90%
10%
V
OH
V
OL
t
TLH
t
THL
≤ 10 ns ≤ 10 ns
TEST CIRCUIT
CL = 2.5 nF
Pulse
Generator
(see Note A)
Input
Output
SR
+
6V
t
THL
or t
TLH
NOTE A: The pulse generator has the following characteristics: ZO = 50 Ω, duty cycle ≤ 50%.
Figure 3. Test Circuit and Waveforms for t
THL
and t
TLH
Measurements (20-µs input)
MAX232, MAX232I
DUAL EIA-232 DRIVER/RECEIVER
SLLS047G – FEBRUARY 1989 – REVISED AUGUST 1998
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
V
S+
V
S–
2
6
14
7
13
8
C1+
C1–
C2+
C2–
1
3
4
5
11
10
12
9
GND
15
0 V
V
CC
16
5 V
EIA-232 Output
EIA-232 Output
EIA-232 Input
EIA-232 Input
+
1 µF
8.5 V
– 8.5 V
1 µF
1 µF
1 µF
From CMOS or TTL
To CMOS or TTL
Figure 4. Typical Operating Circuit
IMPORTANT NOTICE
T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue
any product or service without notice, and advise customers to obtain the latest version of relevant information
to verify, before placing orders, that information being relied on is current and complete. All products are sold
subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those
pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in
accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily
performed, except those mandated by government requirements.
CERT AIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF
DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL
APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR
WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICA TIONS IS UNDERST OOD TO
BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating
safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent
that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other
intellectual property right of TI covering or relating to any combination, machine, or process in which such
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party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
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