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參數(shù)資料
| 型號： | 933670960652 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | HCT SERIES, 8-BIT TRANSCEIVER, INVERTED OUTPUT, PDIP20 |
| 封裝： | PLASTIC, DIP-20 |
| 文件頁數(shù)： | 5/6頁 |
| 文件大小： | 46K |
| 代理商： | 933670960652 |
March 1988
5
Philips Semiconductors
Product specication
Octal bus transceiver; 3-state; inverting
74HC/HCT640
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
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
11
22
28
33
ns
4.5
Fig.5
tPZH/ tPZL
3-state output enable time
OE, DIR to An;
OE, DIR to Bn
18
30
38
45
ns
4.5
Fig.6
tPHZ/ tPLZ
3-state output disable time
OE, DIR to An;
OE, DIR to Bn
19
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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