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參數(shù)資料
| 型號(hào)： | 933967980118 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | HCT SERIES, OCTAL 1-BIT DRIVER, TRUE OUTPUT, PDSO20 |
| 封裝： | PLASTIC, SO-20 |
| 文件頁數(shù)： | 6/7頁 |
| 文件大?。?/td> | 53K |
| 代理商： | 933967980118 |
December 1990
6
Philips Semiconductors
Product specication
Octal Schmitt trigger buffer/line driver; 3-state
74HC/HCT7541
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Transfer characteristics are given below (not applicable for OEn inputs).
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 = 50 pF
TRANSFER CHARACTERISTICS FOR 74HCT
Voltages are referred to GND (ground = 0 V)
INPUT
UNIT LOAD COEFFICIENT
OE1
OE2
An
1.30
0.20
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
19
32
40
48
ns
4.5
Fig.8
tPZH/ tPZL
3-state output enable time
OEn to Yn
18
32
40
48
ns
4.5
Fig.8
tPHZ/ tPLZ
3-state output disable time
OEn to Yn
20
32
40
48
ns
4.5
Fig.8
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.8
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.
VT+
positive-going threshold
2.0
2.1
2.0
2.1
2.0
2.1
V
4.5
5.5
Figs 6 and 7
VT
negative-going threshold
0.70
0.80
0.64
0.74
0.60
0.70
V
4.5
5.5
Figs 6 and 7
VH
hysteresis (VT+ VT)
0.17
0.23
V
4.5
5.5
Figs 6 and 7
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