參數(shù)資料
型號: 74AHCT157PWDH
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: Quad 2-input multiplexer
中文描述: AHCT/VHCT SERIES, QUAD 2 LINE TO 1 LINE MULTIPLEXER, TRUE OUTPUT, PDSO16
封裝: 4.40 MM, PLASTIC, SOT-403-1, TSSOP-16
文件頁數(shù): 3/16頁
文件大?。?/td> 84K
代理商: 74AHCT157PWDH
1999 Sep 24
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74AHC157;
74AHCT157
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
3.0 ns.
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W).
P
D
= C
PD
×
V
CC2
×
f
i
+
(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
(C
L
×
V
CC2
×
f
o
) = sum of outputs;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts.
The condition is V
I
= GND to V
CC
.
2.
PINNING
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
AHC
AHCT
t
PHL
/t
PLH
propagation delay
nI
0
, nI
1
to nY
S to nY
E to nY
input capacitance
output capacitance
power dissipation
capacitance
C
L
= 15 pF; V
CC
= 5 V
C
L
= 15 pF; V
CC
= 5 V
C
L
= 15 pF; V
CC
= 5 V
V
I
= V
CC
or GND
3.2
4.5
3.7
3.0
4.0
3.4
5.1
4.0
3.0
4.0
ns
ns
ns
pF
pF
C
I
C
O
C
PD
C
L
= 50 pF; f = 1 MHz; notes 1 and 2
4 outputs switching via S
1 output switching via I
31
13
41
16
pF
pF
PIN
SYMBOL
DESCRIPTION
1
2, 5, 11 and 14
3, 6, 10 and 13
4, 7, 9 and 12
8
15
16
S
1I
0
to 4I
0
1I
1
to 4I
1
1Y to 4Y
GND
E
V
CC
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
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