MAX232, MAX232I

DUAL EIA232 DRIVERS/RECEIVERS

SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004

4

POST OFFICE BOX 655303

DRIVER SECTION

electrical characteristics over recommended ranges of supply voltage and operating free-air

temperature range (see Note 4)

PARAMETER

TEST CONDITIONS

MIN

TYP†

MAX

UNIT

VOH

High-level output voltage

T1OUT, T2OUT

RL = 3 kΩ to GND

5

7

V

VOL

Low-level output voltage‡

T1OUT, T2OUT

RL = 3 kΩ to GND

−7

−5

V

ro

Output resistance

T1OUT, T2OUT

VS+ = VS− = 0,

VO = ±2 V

300

Ω

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

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.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SR

Driver slew rate

RL = 3 kΩ to 7 kΩ,

See Figure 2

30

V

/µs

SR(t)

Driver transition region slew rate

See Figure 3

3

V

/µs

Data rate

One TOUT switching

120

kbit/s

NOTE 4: Test conditions are C1−C4 = 1

µF 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 4)

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

Ω

† 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.

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 4: Test conditions are C1−C4 = 1

µF at VCC = 5 V ± 0.5 V.