參數(shù)資料
型號： 933713590652
廠商： NXP SEMICONDUCTORS
元件分類： 總線收發(fā)器
英文描述： HCT SERIES, OCTAL 1-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20
封裝： PLASTIC, SO-20
文件頁數(shù)： 6/7頁
文件大小： 46K
代理商： 933713590652
September 1993
6
Philips Semiconductors
Product specication
Octal bus transceiver; 3-state
74HC/HCT245
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 (
ICC) 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 =50pF
INPUT
UNIT LOAD COEFFICIENT
An
Bn
OE
DIR
0.40
1.50
0.90
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 Bn;
Bn to An
12
22
28
33
ns
4.5
Fig.5
tPZH/ tPZL
3-state output enable time
OE to An;
OE to Bn
signalname DIR
16
30
38
45
ns
4.5
Fig.6
tPHZ/ tPLZ
3-state output disable time
OE to An;
OE to Bn
signalname DIR
16
30
38
45
ns
4.5
Fig.6
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.5
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