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

.

LOW POWER DISSIPATION

.

HIGH NOISE IMMUNITY

.

OUTPUT DRIVE CAPABILITY

10 LSTTL LOADS

.

SYMMETRICAL OUTPUT IMPEDANCE

.

BALANCED PROPAGATION DELAYS

.

WIDE OPERATING VOLTAGE RANGE

.

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

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.

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