M54HCT688 Datasheet, PDF (1/10 Pages) STMicroelectronics – 8 BIT EQUALITY COMPARATOR

M54HCT688
M74HCT688
. HIGH SPEED
tPD = 17 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
I_CC = 4 µA (MAX.) AT T_A = 25 °C
. COMPATIBLE WITH TTL OUTPUTS
VIH = 2V (MIN.) VIL = 0.8V (MAX)
. OUTPUT DRIVE CAPABILITY
10 LSTTL LOADS
. SYMMETRICAL OUTPUT IMPEDANCE
|IOH| = IOL = 4 mA (MIN.)
. BALANCED PROPAGATION DELAYS
t_PLH = t_PHL
. PIN AND FUNCTION COMPATIBLE
WITH 54/74LS688
8 BIT EQUALITY COMPARATOR
B1R
(Plastic Package)
F1R
(Ceramic Package)
M 1R
(Micro Package)
C1R
(Chip Carrier)
ORDER CODES :
M54HCT688F1R M74HCT688M1R
M74HCT688B1R M74HCT688C1R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HCT688 utilizes silicon gate C²MOS
technology to achieve operating speeds equivalent
to LSTTL devices. Along with the low power
dissipation and high noise immunity of standard
C²MOS integrated circuit, it possesses the driving
capability of 10 LSTTL load. The M54/74HCT688
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 facilitate cascading several packages to
enable comparison of words greater than 8 bits.
This integrated circuit has input and output
characteristics that are fully compatible with 54/74
LSTTL logic families. M54/74HCT devices are
designed to directly interface HSC²MOS systems
with TTL and NMOS components. They are also
plug in replacements for LSTTL devices giving a
reduction of power consumption.
All inputs are equipped with protection circuit
against static discharge and transient excess
voltage.
NC =
No Internal
Connection
February 1993
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