SN65C3243, SN75C3243

3V TO 5.5V MULTICHANNEL COMPATIBLE RS232 LINE DRIVERS/RECEIVERS

SLLS353D − JUNE 1999 − REVISED MARCH 2004

9

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

TEST CIRCUIT

VOLTAGE WAVEFORMS

50

Ω

Generator

(see Note B)

±3 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

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.

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

Figure 4. Receiver Enable and Disable Times