74AHC157 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
componentes Descripción
Lista de partido
74AHC157 Datasheet PDF : 16 Pages
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Philips Semiconductors
Quad 2-input multiplexer
Product specification
74AHC157;
74AHCT157
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf ≤ 3.0 ns.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
AHC
AHCT
tPHL/tPLH propagation delay
nI0, nI1 to nY
CL = 15 pF; VCC = 5 V
3.2
3.4
S to nY
CL = 15 pF; VCC = 5 V
4.5
5.1
E to nY
CL = 15 pF; VCC = 5 V
3.7
4.0
CI
input capacitance
VI = VCC or GND
3.0
3.0
CO
output capacitance
4.0
4.0
CPD
power dissipation
CL = 50 pF; f = 1 MHz; notes 1 and 2
capacitance
4 outputs switching via S
31
41
1 output switching via I
13
16
Notes
1. CPD is used to determine the dynamic power dissipation (PD in µW).
PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
∑ (CL × VCC2 × fo) = sum of outputs;
CL = output load capacitance in pF;
VCC = supply voltage in Volts.
2. The condition is VI = GND to VCC.
UNIT
ns
ns
ns
pF
pF
pF
pF
PINNING
PIN
1
2, 5, 11 and 14
3, 6, 10 and 13
4, 7, 9 and 12
8
15
16
S
1I0 to 4I0
1I1 to 4I1
1Y to 4Y
GND
E
VCC
SYMBOL
DESCRIPTION
common data select input
data inputs from source 0
data inputs from source 1
multiplexer outputs
ground (0 V)
enable input (active LOW)
DC supply voltage
1999 Sep 24
3
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