M54HC688

M74HC688

October 1992

8 BIT EQUALITY COMPARATOR

B1R

(Plastic Package)

ORDER CODES :

M54HC688F1R

M74HC688M1R

M74HC688B1R

M74HC688C1R

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 54/74LS688

The M54/74HC688 utilizes silicon gate C

technology to achieve operating speeds equivalent

to LSTTL devices. Along with the low power dissi-

pation and high noise immunity of standard C

integrated circuit, it possesses the driving capability

of 10 LSTTL load. The M54/74HC688 compares bit

for bit two 8-bit words applied on inputs P0 - P7 and

inputs Q0 - Q7 and indicates whether or not they are

equal. A single active low enable is provided to fa-

cilitate cascading several packages to enable com-

parison of words greater than 8 bits. All inputs are

equipped with protection circuit against static dis-

charge and transient excess voltage.

1/10