MAX232, MAX232I

DUAL EIA232 DRIVERS/RECEIVERS

SLLS047L − FEBRUARY 1989 − REVISED MARCH 2004

6

POST OFFICE BOX 655303

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

µs

WAVEFORMS

90%

50%

10%

RL

90%

10%

90%

10%

tTLH

tTHL

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 Ω, duty cycle ≤ 50%.

B. CL includes probe and jig capacitance.

Pulse

Generator

(see Note A)

EIA-232 Output

EIA-232 Output

−3 V

3 V

−3 V

3 V

3 k

Ω

10%

1.5 V

90%

WAVEFORMS

20

µs

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

+

6V

t

THL

or t

TLH

NOTE A:

The pulse generator has the following characteristics: ZO = 50 Ω, duty cycle ≤ 50%.