參數(shù)資料
型號： 935188390118
廠商： NXP SEMICONDUCTORS
元件分類： 編、解碼器及復用、解復用
英文描述： HC/UH SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16
封裝： SOT-403-1, TSSOP-16
文件頁數(shù)： 2/7頁
文件大?。?/td> 51K
代理商： 935188390118
December 1990
2
Philips Semiconductors
Product specication
8-input multiplexer; 3-state
74HC/HCT251
FEATURES
True and complement outputs
Both outputs are 3-state for further multiplexer
expansion
Multifunction capability
Permits multiplexing from n-lines to one line
Output capability: standard
ICC category: MSI
GENERAL DESCRIPTION
The 74HC/HCT251 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT251 are the logic implementations of
single-pole 8-position switches with the state of three
select inputs (S0,S1,S2) controlling the switch positions.
Assertion (Y) and negation (Y) outputs are both provided.
The output enable input (OE) is active LOW. The logic
function provided at the output, when activated, is:
Y= OE.(I0.S0.S1.S2 + I1.S0.S1.S2 +
+ I2.S0.S1.S2 + I3.S0.S1.S2 +
+ I4.S0.S1.S2 + I5.S0.S1.S2 +
+ I6.S0.S1.S2 + I7.S0.S1.S2)
Both outputs are in the high impedance OFF-state (Z)
when the output enable input is HIGH, allowing multiplexer
expansion by tying the outputs.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes
1. CPD is used to determine the dynamic power dissipation (PD in W):
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 V
2. For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
tPHL/ tPLH
propagation delay
CL = 15 pF; VCC = 5 V
In to Y
15
19
ns
In to Y17
19
ns
Sn to Y
20
ns
Sn to Y21
21
ns
CI
input capacitance
3.5
pF
CPD
power dissipation capacitance per package
notes 1 and 2
44
46
pF
相關PDF資料
PDF描述
935188380112 HCT SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDSO16
933670160652 HCT SERIES, 8 LINE TO 1 LINE MULTIPLEXER, COMPLEMENTARY OUTPUT, PDIP16
935188730118 HC/UH SERIES, HEX 1-INPUT NON-INVERT GATE, PDSO16
933714810652 HC/UH SERIES, HEX 1-INPUT NON-INVERT GATE, PDSO16
935187470112 HC/UH SERIES, HEX 1-INPUT NON-INVERT GATE, PDSO16
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