M54HCT164 datasheet(1/12 Pages) STMICROELECTRONICS

Numer części	M54HCT164

Szczegółowy opis	8 BIT SIPO SHIFT REGISTER

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Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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M54HCT164

M74HCT164

February 1993

8 BIT SIPO SHIFT REGISTER

B1R

(Plastic Package)

ORDER CODES :

M54HCT164F1R

M74HCT164M1R

M74HCT164B1R

M74HCT164C1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

.

HIGH SPEED

tPD = 20 ns (TYP.) AT VCC =5 V

.

LOW POWER DISSIPATION

ICC =4

µA (MAX.) AT TA =25 °C

.

OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.

BALANCED PROPAGATION DELAYS

tPLH =tPHL = 4 mA (MIN.)

.

SYMMETRICAL OUTPUT IMPEDANCE

IOL =

IOH = 4 mA (MIN)

.

COMPATIBLE WITH TTL OUTPUTS

VIH = 2V (MIN.) VIL = 0.8V (MAX)

.

WIDE OPERATING VOLTAGE RANGE

VCC (OPR) = 2 V TO 6 V

.

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS164

DESCRIPTION

The M54/74HCT164 is a high speed CMOS 8 BIT

SIPO SHIFT REGISTER fabricated in silicon gate

C

2MOS technology. It has the same high speed per-

formance of LSTTL combined with true CMOS low

power consumption.

The HCT164 is an 8 bit shift register with serial data

entry and an output from each of the eight stages.

Data is entered serially through one of two inputs (A

or B), either of these inputs can be used as an active

high enable for data entry through the other input.

An unused input must be high, or both inputs con-

nected together. Each low-to-high transition on the

clock input shifts data one place to the right and

enters into QA, the logic NAND of the two data inputs

(A

• B), the data that existed before the rising clock

edge. A low level on the clear input overrides all

other inputs and clears the register asynchronously,

forcing all Q outputs low.

All inputs are equipped with protection circuits

against static discharge and transient excess volt-

age.

This integrated circuit has input and output charac-

teristics that are fully compatible with 54/74 LSTTL

logic families. M54/74HCT devices are designed to

directly interface HSC

2MOS systems with TTL and

NMOS components. They are also plug in replace-

ments for LSTTL devices giving a reduction of

power consumption.

1/12

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