SN65LBC176AEP

DIFFERENTIAL BUS TRANSCEIVER

SGLS151C − DECEMBER 2002 − REVISED JULY 2004

7

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

PARAMETER MEASUREMENT INFORMATION

VOC

VOD

27

Ω

27

Ω

0 or 3 V

Figure 1. Driver VOD and VOC

Figure 2. Driver VOD3

VOD

Vtest

R1

375

Ω

0 V or 3 V

Z

D

R2

375

Ω

Vtest

Y

RL = 60 Ω

− 7 V < Vtest < 12 V

VOLTAGE WAVEFORMS

10%

tf

tPHL

tr

≈ 1.5 V

≈ − 1.5 V

90%

50%

Output

tPLH

0 V

3 V

1.5 V

Input

TEST CIRCUIT

VO

CL = 50 pF

(see Note B)

RL = 54 Ω

50

Ω

Generator

(see Note A)

1.5 V

NOTES: D. The input pulse is supplied by a generator having the following characteristics: PRR

≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns,

ZO =50 Ω.

E. CL includes probe and jig capacitance.

Figure 3. Driver Test Circuit and Voltage Waveforms

VOLTAGE WAVEFORMS

tPHZ

1.5 V

2.3 V

0.5 V

0 V

3 V

tPZH

Output

Input

1.5 V

S1

3 V

Output

TEST CIRCUIT

50

Ω

VOH

Voff ≈ 0 V

RL = 110 Ω

Generator

(see Note A)

CL = 50 pF

(see Note B)

NOTES: A. The input pulse is supplied by a generator having the following characteristics: PRR

≤ 1 MHz, 50% duty cycle, tr ≤ 6 ns, tf ≤ 6 ns,

ZO =50 Ω.

B. CL includes probe and jig capacitance.

Figure 4. Driver Test Circuit and Voltage Waveforms