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PDF M74HC688 Data sheet ( Hoja de datos )
| Número de pieza | M74HC688 | |
| Descripción | 8 BIT EQUALITY COMPARATOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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M74HC688
8 BIT EQUALITY COMPARATOR
s HIGH SPEED:
tPD = 17ns (TYP.) at VCC = 6V
s LOW POWER DISSIPATION:
ICC = 4µA(MAX.) at TA=25°C
s HIGH NOISE IMMUNITY:
)VNIH = VNIL = 28 % VCC (MIN.)
t(ss SYMMETRICAL OUTPUT IMPEDANCE:
c|IOH| = IOL = 4mA (MIN)
us BALANCED PROPAGATION DELAYS:
dtPLH ≅ tPHL
ros WIDE OPERATING VOLTAGE RANGE:
PVCC (OPR) = 2V to 6V
s PIN AND FUNCTION COMPATIBLE WITH
te74 SERIES 688
oleDESCRIPTION
bsThe M74HC688 is an high speed CMOS 8 BIT
EQUALITY COMPARATOR fabricated with silicon
Ogate C2MOS technology.
-The M74HC688 compares bit for bit two 8-bit
t(s)words applied on inputs P0 - P7 and inputs Q0 -
Q7 and indicates whether or not they are equal. A
DIP
SOP
TSSOP
ORDER CODES
PACKAGE
TUBE
DIP
SOP
TSSOP
M74HC688B1R
M74HC688M1R
T&R
M74HC688RM13TR
M74HC688TTR
single active low enable is provided to facilitate
cascading several packages to enable
comparison of words greater than 8 bits.
All inputs are equipped with protection circuits
against static discharge and transient excess
voltage.
Obsolete ProducPIN CONNECTION AND IEC LOGIC SYMBOLS
July 2001
1/9
1 page  
M74HC688
CAPACITIVE CHARACTERISTICS
Test Condition
Value
Symbol
Parameter
VCC
(V)
TA = 25°C
-40 to 85°C -55 to 125°C Unit
Min. Typ. Max. Min. Max. Min. Max.
CIN Input Capacitance
5 10 10 10 pF
CPD Power Dissipation
Capacitance (note
1)
32
pF
1) 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 operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC
TEST CIRCUIT
ct(s) - Obsolete Product(s)CL = 50pF/150pF or equivalent (includes jig and probe capacitance)
uRT = ZOUT of pulse generator (typically 50Ω)
Obsolete ProdWAVEFORM : PROPAGATION DELAY TIME (f=1MHz; 50% duty cycle)
5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet M74HC688.PDF ] | |
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