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參數(shù)資料
| 型號： | 74HC27 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Triple 3-input NOR gate |
| 中文描述： | 三3輸入或非門 |
| 文件頁數(shù)： | 2/5頁 |
| 文件大小： | 32K |
| 代理商： | 74HC27 |
December 1990
2
Philips Semiconductors
Product specification
Triple 3-input NOR gate
74HC/HCT27
FEATURES
Output capability: standard
I
CC
category: SSI
GENERAL DESCRIPTION
The 74HC/HCT27 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
The 74HC/HCT27 provide the 3-input NOR function.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°
C; t
r
= t
f
= 6 ns
Notes
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in
μ
W):
P
D
= C
PD
×
V
CC2
×
f
i
+ ∑
(C
L
×
V
CC2
×
f
O
) where:
f
i
= input frequency in MHz
f
o
= output frequency in MHz
∑
(C
L
×
V
CC2
×
f
o
) = sum of outputs
C
L
= output load capacitance in pF
V
CC
= supply voltage in V
For HC the condition is V
I
= GND to V
CC
For HCT the condition is V
I
= GND to V
CC
1.5 V
2.
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
.
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
HC
HCT
t
PHL
/ t
PLH
C
I
C
PD
propagation delay nA, nB, nC to nY
input capacitance
power dissipation capacitance per gate
C
L
= 15 pF; V
CC
= 5 V
8
3.5
24
10
3.5
30
ns
pF
pF
notes 1 and 2
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