MAX3222

3V TO 5.5V MULTICHANNEL RS232 LINE DRIVER/RECEIVER

WITH ±15kV ESD PROTECTION

SLLS408G − JANUARY 2000 − REVISED MARCH 2004

7

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

Generator

(see Note B)

3 V or 0 V

Output

VOL

VOH

tPZH

(S1 at GND)

tPLZ

(S1 at VCC)

tPHZ

S1 at GND)

tPZL

(S1 at VCC)

1.5 V

1.5 V

3 V

0 V

50%

0.3 V

Output

Input

50%

0.3 V

EN

RL

S1

VCC

GND

CL

(see Note A)

Output

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.

Figure 4. Receiver Enable and Disable Times