GD65232, GD75232

MULTIPLE RS232 DRIVERS AND RECEIVERS

SLLS206J − MAY 1995 − REVISED NOVEMBER 2004

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

VI

VSS

VDD

VCC

VIT,

VI

IOL

VOH

−IOH

VOL

VSS

VDD

VCC

Pulse

Generator

See Note A

CL

(see Note B)

RL

4 V

0 V

Input

tPHL

tPLH

tTHL

tTLH

VOH

VOL

TEST CIRCUIT

VOLTAGE WAVEFORMS

Input

Output

VSS

NOTES: A. The pulse generator has the following characteristics: tw = 25 µs, PRR = 20 kHz, ZO = 50 Ω, tr = tf < 50 ns.

B. CL includes probe and jig capacitance.

VDD

VCC

50%

50%

90%

50%

10%

50%

10%

90%

Figure 6. Receiver Propagation and Transition Times