M54HC670 datasheet(1/12 Pages) STMICROELECTRONICS

Part #	M54HC670

Description	4 WORD X 4 BIT REGISTER FILE 3 STATE

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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M54HC670

M74HC670

October 1992

4 WORD X 4 BIT REGISTER FILE (3 STATE)

B1R

(Plastic Package)

ORDER CODES :

M54HC670F1R

M74HC670M1R

M74HC670B1R

M74HC670C1R

F1R

(Ceramic Package)

M1R

(Micro Package)

C1R

(Chip Carrier)

PIN CONNECTIONS (top view)

NC =

No Internal

Connection

DESCRIPTION

.

HIGH SPEED

tPD = 23 ns (TYP.) AT VCC =5 V

.

LOW POWER DISSIPATION

ICC =4

µA (MAX.) AT TA =25 °C

.

HIGH NOISE IMMUNITY

VNIH =VNIL =28 % VCC (MIN.)

.

OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.

SYMMETRICAL OUTPUT IMPEDANCE

|IOH|= IOL = 4 mA (MIN.)

.

BALANCED PROPAGATION DELAYS

tPLH =tPHL

.

WIDE OPERATING VOLTAGE RANGE

VCC (OPR) = 2 V TO 6 V

.

PIN AND FUNCTION COMPATIBLE

WITH 54/74LS670

The M54/74HC670 is a high speed CMOS 4 WORD

X 4 BIT REGISTER FILE (3-STATE) fabricated in

silicon gate C

2MOS technology. It has the same

high speed performance of LSTTL combined with

true

CMOS

low

power

consumption.

The

M54HC/74HC670 is a 4 x 4 Register File organized

as four words by four bits. Separate read and write

inputs, both address and enable, allow simulta-

neous read and write operation. The 3-state outputs

make it possible to connect up to 128 outputs to in-

crease the word capacity up to 512 words. Any num-

ber of these devices can be operated in parallel to

generate an n-bit length. All inputs are equipped with

protection circuits against static discharge and tran-

sient excess voltage.

1/12

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