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PDF M54HC688 Data sheet ( Hoja de datos )
| Número de pieza | M54HC688 | |
| Descripción | 8 BIT EQUALITY COMPARATOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M54HC688
M74HC688
. HIGH SPEED
tPD = 17 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 54/74LS688
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
1/10
1 page  
M54/M74HC688
AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6 ns)
Symbol
Parameter
Test Conditions
VCC
(V)
TA = 25 oC
54HC and 74HC
Min. Typ. Max.
Value
-40 to 85 oC
74HC
Min. Max.
-55 to 125 oC
54HC
Min. Max.
Unit
tTLH Output Transition 2.0
tTHL Time
4.5
30 75
8 15
95 110
19 22 ns
6.0 7 13 16 19
tPLH Propagation
2.0
tPHL Delay Time
4.5
(Pn, Qn - P = Q)
6.0
60 170 215 255
21 34 43 51 ns
17 29 37 43
tPLH Propagation
tPHL Delay Time
(G - P = Q)
2.0
4.5
6.0
40 110 140 165
13 22 28 33 ns
10 19 24 28
CIN Input Capacitance
5 10 10 10 pF
CPD (*) Power Dissipation
Capacitance
32
pF
(*) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load.
(Refer to Test Circuit). Average operting current can be obtained by the following equation. ICC(opr) = CPD •VCC •fIN + ICC
SWITCHING CHARACTERISTICS TEST
WAVEFORM
TEST CIRCUIT ICC (Opr.)
INPUT WAVEFORM IS THE SAME AS THAT IN CASE OF
SWITCHING CHARACTERISTICS TEST.
5/10
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet M54HC688.PDF ] | |
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