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MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
D
Meets or Exceeds TIA/EIA-232-F and ITU
D
D
D
D
D
D
D
D
Recommendation V.28
Operates From a Single 5-V Power Supply
With 1.0-mF Charge-Pump Capacitors
Operates Up To 120 kbit/s
Two Drivers and Two Receivers
±30-V
Input Levels
Low Supply Current . . . 8 mA Typical
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
Upgrade With Improved ESD (15-kV HBM)
and 0.1-mF Charge-Pump Capacitors is
Available With the MAX202
Applications
− TIA/EIA-232-F, Battery-Powered Systems,
Terminals, Modems, and Computers
MAX232 . . . D, DW, N, OR NS PACKAGE
MAX232I . . . D, DW, OR N PACKAGE
(TOP VIEW)
C1+
V
S+
C1−
C2+
C2−
V
S−
T2OUT
R2IN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
V
CC
GND
T1OUT
R1IN
R1OUT
T1IN
T2IN
R2OUT
description/ordering information
The MAX232 is a dual driver/receiver that includes a capacitive voltage generator to supply TIA/EIA-232-F
voltage levels from a single 5-V supply. Each receiver converts TIA/EIA-232-F inputs to 5-V TTL/CMOS levels.
These receivers have a typical threshold of 1.3 V, a typical hysteresis of 0.5 V, and can accept
±30-V
inputs.
Each driver converts TTL/CMOS input levels into TIA/EIA-232-F levels. The driver, receiver, and
voltage-generator functions are available as cells in the Texas Instruments LinASIC library.
ORDERING INFORMATION
TA
PDIP (N)
SOIC (D)
0°C to 70°C
SOIC (DW)
SOP (NS)
PDIP (N)
−40 C 85°C
−40°C to 85 C
SOIC (D)
SOIC (DW)
PACKAGE†
Tube of 25
Tube of 40
Reel of 2500
Tube of 40
Reel of 2000
Reel of 2000
Tube of 25
Tube of 40
Reel of 2500
Tube of 40
Reel of 2000
ORDERABLE
PART NUMBER
MAX232N
MAX232D
MAX232DR
MAX232DW
MAX232DWR
MAX232NSR
MAX232IN
MAX232ID
MAX232IDR
MAX232IDW
MAX232IDWR
MAX232I
MAX232I
MAX232
MAX232
MAX232IN
MAX232
TOP-SIDE
MARKING
MAX232N
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
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.
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.
Copyright
2004, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
1
MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
Function Tables
EACH DRIVER
INPUT
TIN
L
H
OUTPUT
TOUT
H
L
H = high level, L = low
level
EACH RECEIVER
INPUT
RIN
L
H
OUTPUT
ROUT
H
L
H = high level, L = low
level
logic diagram (positive logic)
11
T1IN
10
T2IN
12
R1OUT
9
R2OUT
8
R2IN
13
R1IN
7
T2OUT
14
T1OUT
2
POST OFFICE BOX 655303
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DALLAS, TEXAS 75265
MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
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 Notes 2 and 3): D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73°C/W
DW package . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . 64°C/W
Operating virtual junction temperature, T
J
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°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.
NOTES: 1. All voltages are with respect to network GND.
2. Maximum power dissipation is a function of TJ(max),
θ
JA, and TA. The maximum allowable power dissipation at any allowable
ambient temperature is PD = (TJ(max) − TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
recommended operating conditions
MIN
VCC
VIH
VIL
R1IN, R2IN
TA
Supply voltage
High-level input voltage (T1IN,T2IN)
Low-level input voltage (T1IN, T2IN)
Receiver input voltage
Operating free-air temperature
MAX232
MAX232I
0
−40
4.5
2
0.8
±30
70
85
NOM
5
MAX
5.5
UNIT
V
V
V
V
°C
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Note 4 and Figure 4)
PARAMETER
ICC
Supply current
TEST CONDITIONS
VCC = 5.5 V,
TA = 25°C
All outputs open,
MIN
TYP‡
8
MAX
10
UNIT
mA
‡ All typical values are at VCC = 5 V and TA = 25°C.
NOTE 4: Test conditions are C1−C4 = 1
µF
at VCC = 5 V
±
0.5 V.
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DALLAS, TEXAS 75265
3
MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
DRIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (see Note 4)
PARAMETER
VOH
VOL
ro
High-level output voltage
Low-level output voltage‡
Output resistance
T1OUT, T2OUT
T1OUT, T2OUT
T1OUT, T2OUT
TEST CONDITIONS
RL = 3 kΩ to GND
RL = 3 kΩ to GND
VS+ = VS− = 0,
VCC = 5.5 V,
VO =
±2
V
VO = 0
300
MIN
5
TYP†
7
−7
−5
MAX
UNIT
V
V
Ω
IOS§ Short-circuit output current
T1OUT, T2OUT
±10
mA
IIS
Short-circuit input current
T1IN, T2IN
VI = 0
200
µA
† 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 4: Test conditions are C1−C4 = 1
µF
at VCC = 5 V
±
0.5 V.
switching characteristics, V
CC
= 5 V, T
A
= 25°C (see Note 4)
PARAMETER
SR
SR(t)
Driver slew rate
Driver transition region slew rate
Data rate
NOTE 4: Test conditions are C1−C4 = 1
µF
at VCC = 5 V
±
0.5 V.
TEST CONDITIONS
RL = 3 kΩ to 7 kΩ,
See Figure 2
See Figure 3
One TOUT switching
3
120
MIN
TYP
MAX
30
UNIT
V/µs
V/µs
kbit/s
RECEIVER SECTION
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature range (see Note 4)
PARAMETER
VOH
VOL
VIT+
VIT−
High-level output voltage
Low-level output voltage‡
Receiver positive-going input
threshold voltage
Receiver negative-going input
threshold voltage
R1OUT, R2OUT
R1OUT, R2OUT
R1IN, R2IN
R1IN, R2IN
TEST CONDITIONS
IOH = −1 mA
IOL = 3.2 mA
VCC = 5 V,
VCC = 5 V,
TA = 25°C
TA = 25°C
0.8
1.7
1.2
MIN
3.5
0.4
2.4
TYP†
MAX
UNIT
V
V
V
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
kΩ
† 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 4: Test conditions are C1−C4 = 1
µF
at VCC = 5 V
±
0.5 V.
switching characteristics, V
CC
= 5 V, T
A
= 25°C (see Note 4 and Figure 1)
PARAMETER
tPLH(R)
tPHL(R)
Receiver propagation delay time, low- to high-level output
Receiver propagation delay time, high- to low-level output
TYP
500
500
UNIT
ns
ns
NOTE 4: Test conditions are C1−C4 = 1
µF
at VCC = 5 V
±
0.5 V.
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
MAX232, MAX232I
DUAL EIA 232 DRIVERS/RECEIVERS
SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004
PARAMETER MEASUREMENT INFORMATION
VCC
Pulse
Generator
(see Note A)
R1IN
or
R2IN
R1OUT
or
R2OUT
RL = 1.3 kΩ
See Note C
CL = 50 pF
(see Note B)
TEST CIRCUIT
≤10
ns
90%
50%
90%
50%
≤10
ns
3V
10%
tPLH
VOH
Output
1.5 V
1.5 V
WAVEFORMS
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.
VOL
0V
Input
10%
500 ns
tPHL
Figure 1. Receiver Test Circuit and Waveforms for t
PHL
and t
PLH
Measurements
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
5

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