SN75LPE185

LOW-POWER MULTIPLE RS-232 DRIVERS/RECEIVERS

WITH ENABLE

SLLS256F – DECEMBER 1996 – REVISED NOVEMBER 2001

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

IO

II

RL

CL

VI

VO

Inputs

Outputs

tPLH

tPHL

tTLH

tTHL

3 V

0 V

VOH

VOL

VI

VO

50%

50%

50%

50%

VTR+ VTR+

VTR–

VTR–

tw

NOTES: A. The pulse generator has the following characteristics:

For CL < 1000 pF: tw = 4 µs, PRR = 250 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.

For CL = 2500 pF: tw = 8 µs, PRR = 125 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.

B. CL includes probe and jig capacitance.

Figure 1. Driver Parameter Test Circuit and Waveform

IO

II

VI

VO

Inputs

Outputs

VDD

VCC

GND

VSS

IO

II

VI

VO

Inputs

Outputs

IO

II

CL

VI

VO

Inputs

Outputs

tPLH

tPHL

tTLH

tTHL

VIH

VIL

VOH

VOL

VI

VO

50%

50%

50%

50%

90%

90%

10%

10%

tw

NOTES: A. The pulse generator has the following characteristics: tw = 4 µs, PRR = 250 kbit/s, ZO = 50 Ω, tr = tf < 50 ns.

B. CL includes probe and jig capacitance.

Figure 4. Receiver Parameter Test Circuit and Waveform