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PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

50

Ω

Generator

(see Note B)

3 V or 0 V

3 V or 0 V

FORCEON

FORCEOFF

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

C. tPLZ and tPHZ are the same as tdis.

D. tPZL and tPZH are the same as ten.

RL

S1

VCC

GND

CL

(see Note A)

Output

VOLTAGE WAVEFORMS

Output

VOL

VOH

tPZH

(S1 at GND)

3 V

0 V

0.3 V

Output

Input

0.3 V

1.5 V

1.5 V

50%

tPHZ

(S1 at GND)

tPLZ

(S1 at VCC)

50%

tPZL

(S1 at VCC)

MAX3243-EP

3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

WITH

±15-kV ESD (HBM) PROTECTION

SGLS328A – MARCH 2006 – REVISED MAY 2006

Figure 4. Receiver Enable and Disable Times

8

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