74HCT7245 Ver la hoja de datos (PDF) - Philips Electronics

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Fabricante

74HCT7245

Octal bus Schmitt-trigger transceiver; 3-state

Philips Electronics 

Philips Semiconductors

Octal bus Schmitt-trigger transceiver;

3-state

Product specification

74HC/HCT7245

DC CHARACTERISTICS FOR 74HCT

For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.

Output capability: bus driver

ICC category: MSI

Note to HCT types

The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications.

To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.

INPUT

An

Bn

OE

DIR

UNIT LOAD COEFFICIENT

0.33

0.33

1.50

1.00

TRANSFER CHARACTERISTICS FOR 74HCT

Voltages are referred to GND (ground = 0 V)

SYMBOL PARAMETER

Tamb (°C)

TEST CONDITIONS

74HCT

+25

−40 to +85

−40 to +125

UNIT

VCC

(V)

WAVEFORMS

min. typ. max. min. max. min. max.

VT+

positive-going threshold

2.0

2.0

2.1

2.1

2.0 V

2.1

4.5 Figs. 4 and 5

5.5

VT−

negative-going threshold 0.7

0.8

0.64

0.6

0.74

0.7

V 4.5 Figs. 4 and 5

5.5

VH

hysteresis (VT+ − VT−) 0.17 0.23

0.17 0.23

V 4.5 Figs. 4 and 5

5.5

December 1990

5

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