SN75LBC976

9CHANNEL DIFFERENTIAL TRANSCEIVER

SLLS133D − AUGUST 1992 − REVISED MAY 1995

2−10

POST OFFICE BOX 655303

POST OFFICE BOX 1443

PARAMETER MEASUREMENT INFORMATION

0 V 3 V

S3

74HC241

A

DE/RE

Input

(see Note A)

VA

CDE0 at 5 V,

CDE1, CDE2, BSR,

and CRE at 0 V,

All Others Open

B+

B−

50 pF†

50 pF†

S1

0 V

5 V

R1

165

Ω

75

Ω

R2

165

Ω

5 V

0 V

VOD

S2

Input

VA

VOD

Input

VA

VOD

3 V

0 V

1.4 V

ten(TXH)

0 V

3 V

0 V

1.4 V

0 V

ten(TXL)

S1 to 0 V

S2 to 5 V

S3 to 3 V

S1 to 5 V

S2 to 0 V

S3 to 0 V

TEST CIRCUIT

VOLTAGE WAVEFORMS

1.5 V

1.5 V

ten(RXL)

ten(RXH)

1.5 V

1.5 V

† Includes probe and jig capacitance.

NOTE A: The input is provided by a pulse generator with an output of 0 to 3 V, PRR of 1 MHz, 50% duty cycle, tr and tf < 6 ns, and ZO = 50 Ω.

Figure 6. Enable Time Test Circuit and Voltage Waveforms