SN54ABTE16245, SN74ABTE16245

16-BIT INCIDENT-WAVE SWITCHING BUS TRANSCEIVERS

WITH 3-STATE OUTPUTS

SCBS226J – JULY 1993 – REVISED DECEMBER 2001

8

POST OFFICE BOX 655303

PARAMETER MEASUREMENT INFORMATION

From Output

Under Test

LOAD CIRCUIT FOR OUTPUTS

S2

7 V

Open

500

Ω

SWITCHING TABLE

LOADS

tPLH/tPHL (A and B port)

tPLZ/tPZL

tPHZ/tPZH

Up

Up

Up

tPLH

tPHL

Output

Output

Control

(low-level

enabling)

Output

Waveform 1

S2 at 7 V

(see Note B)

Output

Waveform 2

S2 at Open

(see Note B)

VOL

VOH

tPZL

tPZH

tPLZ

tPHZ

3.5 V

3 V

0 V

VOH

VOL

0 V

VOL + 0.3 V

VOH – 0.3 V

≈0 V

3 V

Input

CL = 50 pF

(see Note A)

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

500

Ω

S1

94

Ω

3.65 V

2 nF

Open

7 V

Open

RX†

† RX = 13, 26, or 56Ω

EXTENDED

SWITCHING TABLE

LOADS

tPLH/tPHL/tsk (A port)

tPLH/tPHL/tsk (B port)

tt (A port) (see Note E)

tt (B port) (see Note F)

S1

Down

Up

Down

Up

S2

X

Open

X

Open

S1

S2

NOTES: A. CL includes probe and jig capacitance.

B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.

Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.

C. All input pulses are supplied by generators having the following characteristics: PRR

≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.

D. The outputs are measured one at a time with one transition per measurement.

E. tt is measured between 1 V and 2 V of the output waveform.

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

Figure 2. Load Circuit and Voltage Waveforms