SN75276

FAIL-SAFE DIFFERENTIAL BUS TRANSCEIVER

SLLS212B – SEPTEMBER 1995 – REVISED APRIL 1998

7

POST OFFICE BOX 655303

RECEIVER SECTION

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

tPLH Propagation delay time, low- to high-level output

VID = 0 to 3 V See Figure 6

21

35

ns

tPHL Propagation delay time, high- to low-level output

VID = 0 to 3 V, See Figure 6

23

35

ns

tPZH Output enable time to high level

See Figure 7

10

20

ns

tPZL

Output enable time to low level

See Figure 7

12

20

ns

tPHZ Output disable time from high level

See Figure 7

20

35

ns

tPLZ

Output disable time from low level

See Figure 7

17

25

ns

PARAMETER MEASUREMENT INFORMATION

2

RL

VOD2

VOC

2

RL

VOL

VOH

–IOH

+IOL

VID

3 V

VOLTAGE WAVEFORMS

tt(OD)

td(OD)

1.5 V

10%

tt(OD)

≈ 2.5 V

≈ – 2.5 V

90%

50%

Output

td(OD)

0 V

3 V

1.5 V

Input

TEST CIRCUIT

Output

CL = 50 pF

(see Note B)

50

Ω

RL = 54 Ω

Generator

(see Note A)

50%

10%

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 3. Driver Test Circuit and Voltage Waveforms