參數(shù)資料
型號： 933715600652
廠商： NXP SEMICONDUCTORS
元件分類： 總線收發(fā)器
英文描述： HCT SERIES, OCTAL 1-BIT DRIVER, INVERTED OUTPUT, PDSO20
封裝： PLASTIC, SO-20
文件頁數(shù)： 6/7頁
文件大?。?/td> 51K
代理商： 933715600652
December 1990
6
Philips Semiconductors
Product specication
Octal buffer/line driver; 3-state; inverting
74HC/HCT540
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
OE1
OE2
An
1.50
1.00
1.40
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
An to Yn
13
24
30
36
ns
4.5
Fig.6
tPZH/ tPZL
3-state
output enable time
OE to Yn
22
35
44
53
ns
4.5
Fig.7
tPHZ/ tPLZ
3-state output
disable time
OE to Yn
23
35
44
53
ns
4.5
Fig.7
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.6
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