SN75LV4737A

3.3-V/5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER

SLLS178D – APRIL 1994 – REVISED FEBRUARY 2000

10

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)

3 V

0 V

0.3 V

Output

Input

25

µs

3 V or 0 V

EN

STBY

RL

S1

VCC

GND

CL = 50 pF

(see Note A)

Output

NOTES: A. CL includes probe and jig capacitance.

B. The pulse generator has the following characteristics: PRR = 1 MHz, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.

50%

50%

50%

50%

1.5 V

1.5 V

tPHZ

(S1 at GND)

tPLZ

(S1 at VCC)

0.3 V

tPZL

(S1 at VCC)

Figure 5. Receiver Enable and Disable Times