74ABT2244PW データシートの表示（PDF） - Philips Electronics

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74ABT2244PW

Octal buffer/line driver with 30Ω series termination resistors (3-State)

Philips Electronics 

Philips Semiconductors

Octal buffer/line driver with 30Ω series

termination resistors (3-State)

Product specification

74ABT2244

AC WAVEFORMS

VM = 1.5V, VIN = GND to 3.0V

3V

INPUT

1.5V

tPLH

1.5V

tPHL

0V

VOH

OUTPUT

1.5V

1.5V

VOL

SA00028

Waveform 1. Waveforms Showing the Input (An) to Output (Yn)

Propagation Delays

TEST CIRCUIT AND WAVEFORMS

From Output

Under Test

CL = 50 pF

500 Ω

500 Ω

7V

S1

Open

GND

Load Circuit

TEST

S1

tpd

tPLZ/tPZL

tPHZ/tPZH

open

7V

open

DEFINITIONS

CL = Load capacitance includes jig and probe capacitance;

see AC CHARACTERISTICS for value.

SA00012

Output Control

(Low-level

enabling

1.5 V

3V

1.5 V

tPZL

Output

Waveform 1

S1 at 7 V

(see Note)

tPZH

Output

Waveform 2

S1 at Open

(see Note)

1.5 V

1.5 V

tPLZ

tPHZ

0V

3.5V

VOL + 0.3V

VOL

VOH

VOH – 0.3V

0V

Note:

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.

SA00029

Waveform 2. Waveforms Showing the 3-State Output Enable

and Disable Times

1998 Jan 16

6

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