M54HC688 Datasheet, PDF (1/10 Pages) STMicroelectronics – 8 BIT EQUALITY COMPARATOR

M54HC688
M74HC688
. HIGH SPEED
tPD = 17 ns (TYP.) AT VCC = 5 V
. LOW POWER DISSIPATION
I_CC = 4 µA (MAX.) AT T_A = 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
t_PLH = t_PHL
. WIDE OPERATING VOLTAGE RANGE
VCC (OPR) = 2 V TO 6 V
. 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 :
M 54HC 68 8F 1R
M 74H C6 88 M1 R
M 74HC 68 8B 1R
M 74H C6 88 C1 R
PIN CONNECTIONS (top view)
DESCRIPTION
The M54/74HC688 utilizes silicon gate C²MOS
technology to achieve operating speeds equivalent
to LSTTL devices. Along with the low power dissi-
pation and high noise immunity of standard C²MOS
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.
NC =
No Internal
Connection
October 1992
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