SN75196

MULTIPLE RS-232 DRIVERS AND RECEIVERS

SLLS188B – MAY 1995 – REVISED APRIL 1998

8

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

VI

VDD

VCC

VSS

–IOS

Figure 4. Receiver Test Circuit for IOS

VIT, VI

VDD

VCC

VSS

IOL

VOH

–IOH

VOL

Figure 5. Receiver Test Circuit for VIT, VOH, and VOL

5 V

–5 V

50%

50%

Input

tPHL

tPLH

90%

50%

10%

50%

10%

90%

tTHL

tTLH

VOH

VOL

VOLTAGE WAVEFORMS

Output

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.

Pulse

Generator

See Note A

CL

(see Note B)

RL

TEST CIRCUIT

Input

VSS

VCC

VDD

VO

Figure 6. Receiver Propagation and Transition Times