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PARAMETER MEASUREMENT INFORMATION

Input

(see Note D)

From Output

Under Test

(see Note A)

LOAD CIRCUIT

S1

Open

GND

500

Ω

500

Ω

Output

Control

Output

Waveform 1

(see Note C)

Output

Waveform 2

S1 at GND

(see Note C)

1.4 V

1.4 V

0 V

1.4 V

1.4 V

0 V

2.7 V

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

Open

GND

TEST

S1

B. Input rise and fall times are 3 ns.

C. 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.

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

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES (B to A)

2.7 V

0 V

1.4 V

Input

(see Note B)

Output

1.4 V

HOST LOGIC IN TO HOST LOGIC OUT OR B-TO-A LOAD (TOTEM POLE)

A-TO-B LOAD OR A-TO-Y LOAD (TOTEM POLE) OR PERI LOGIC IN TO PERI LOGIC OUT

VOLTAGE WAVEFORMS MEASURED AT TP1

PROPAGATION DELAY TIMES (A to B)

2.7 V

0 V

1.4 V

Output

1.4 V

From Output

Under Test

(see Note A)

LOAD CIRCUIT

S1

Open

GND

500

Ω

500

Ω

Open

GND

TEST

S1

SN74LVCE161284

19-BIT IEEE STD 1284 TRANSLATION TRANSCEIVER

WITH ERROR-FREE POWER UP

SCES541 – JANUARY 2004 – REVISED MARCH 2005

Figure 3. Load Circuits and Voltage Waveforms

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