www.ti.com

3 V

3 V

0 V

0 V

VOLTAGE WAVEFORMS

SETUP AND HOLD TIMES

Data Input

3 V

0 V

Input

Out-of-Phase

Output

In-Phase

Output

Timing Input

VOLTAGE WAVEFORMS

PROPAGATION DELAY TIMES

INVERTING AND NONINVERTING OUTPUTS

Output

Control

Output

Waveform 1

(see Note B)

Output

Waveform 2

S1 at GND

(see Note B)

0 V

≈0 V

3 V

VOLTAGE WAVEFORMS

ENABLE AND DISABLE TIMES

LOW- AND HIGH-LEVEL ENABLING

Open Drain

Open

GND

TEST

S1

3 V

0 V

VOLTAGE WAVEFORMS

PULSE DURATION

Input

From Output

Under Test

(see Note A)

LOAD CIRCUIT FOR

3-STATE AND OPEN-DRAIN OUTPUTS

S1

GND

From Output

Under Test

(see Note A)

Test

Point

LOAD CIRCUIT FOR

TOTEM-POLE OUTPUTS

Open

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

1.5 V

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

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

H. All parameters and waveforms are not applicable to all devices.

SN74LV245AT

OCTAL BUS TRANSCEIVER

WITH 3-STATE OUTPUTS

SCLS605B – DECEMBER 2004 – REVISED AUGUST 2005

PARAMETER MEASUREMENT INFORMATION

Figure 1. Load Circuits and Voltage Waveforms

6