TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

Generator

(see Note B)

3 V or 0 V

Output

VOL

VOH

tPZH

(S1 at GND)

3 V

0 V

0.3 V

Output

Input

0.3 V

3 V or 0 V

FORCEON

EN

1.5 V

1.5 V

50%

tPHZ

(S1 at GND)

tPLZ

(S1 at VCC)

50%

tPZL

(S1 at VCC)

RL

S1

VCC

GND

CL

(see Note A)

Output

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.

Figure 7-4. Receiver Enable and Disable Times

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MAX3221

SLLS348P – JUNE 1999 – REVISED JULY 2021

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