March 1988

2

Philips Semiconductors

HCMOS family characteristics

FAMILY

SPECIFICATIONS

GENERAL

These family specifications cover the common electrical

ratings and characteristics of the entire HCMOS

74HC/HCT/HCU family, unless otherwise specified in the

individual device data sheet.

INTRODUCTION

The 74HC/HCT/HCU high-speed Si-gate CMOS logic

family combines the low power advantages of the

HE4000B family with the high speed and drive capability of

the low power Schottky TTL (LSTTL).

The family will have the same pin-out as the 74 series and

provide the same circuit functions.

In these families are included several HE4000B family

circuits which do not have TTL counterparts, and some

special circuits.

The basic family of buffered devices, designated as

XX74HCXXXXX, will operate at CMOS input logic levels

for high noise immunity, negligible typical quiescent supply

and input current. It is operated from a power supply of

2to6V.

A subset of the family, designated as XX74HCTXXXXX,

with the same features and functions as the “HC-types”,

will operate at standard TTL power supply voltage

(5 V

± 10%) and logic input levels (0.8 to 2.0 V) for use as

pin-to-pin compatible CMOS replacements to reduce

power consumption without loss of speed. These types are

also suitable for converted switching from TTL to CMOS.

Another subset, the XX74HCUXXXXX, consists of

single-stage unbuffered CMOS compatible devices for

application in RC or crystal controlled oscillators and other

types of feedback circuits which operate in the linear

mode.

HANDLING MOS DEVICES

Inputs and outputs are protected against electrostatic

effects in a wide variety of device-handling situations.

However, to be totally safe, it is desirable to take handling

precautions into account

(see also

“HANDLING PRECAUTIONS”).

RECOMMENDED OPERATING CONDITIONS FOR 74HC/HCT

Note

1. For analog switches, e.g. “4016”, “4051 series”, “4351 series”, “4066” and “4067”, the specified maximum operating

supply voltage is 10 V.

SYMBOL PARAMETER

74HC

74HCT

UNIT CONDITIONS

min. typ.

max.

min. typ.

max.

DC supply voltage

2.0

5.0

6.0

4.5

5.0

5.5

V

DC input voltage range

0

V

DC output voltage range

0

V

operating ambient temperature range

−40

+85

−40

+85

°C

see DC and AC

CHAR. per device

operating ambient temperature range

−40

+125 −40

+125 °C

input rise and fall times except for

Schmitt-trigger inputs

6.0

1000

6.0

500

ns

500

400