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74HC253N 数据表(PDF) 6 Page - NXP Semiconductors

部件名 74HC253N
功能描述  Dual 4-input multiplexer; 3-state
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

74HC253N 数据表(HTML) 6 Page - NXP Semiconductors

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December 1990
6
Philips Semiconductors
Product specification
Dual 4-input multiplexer; 3-state
74HC/HCT253
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: bus driver
ICC category: MSI
Note to HCT types
The value of additional quiescent supply current (
∆I
CC) for a unit load of 1 is given in the family specifications.
To determine
∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
INPUT
UNIT LOAD COEFFICIENT
1In
2In
nOE
S0
S1
0.40
0.40
1.10
1.10
1.10
SYMBOL PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85 −40 to +125
min.
typ.
max.
min. max. min.
max.
tPHL/ tPLH
propagation delay
1In to nY;
2In to nY
20
38
48
57
ns
4.5
Fig.6
tPHL/ tPLH
propagation delay
Sn to nY
22
40
50
60
ns
4.5
Fig.6
tPZH/ tPZL
3-state output enable time
nOE to nY
14
30
38
45
ns
4.5
Fig.7
tPHZ/ tPLZ
3-state output disable time
nOE to nY
13
30
38
45
ns
4.5
Fig.7
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.6


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