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參數(shù)資料
| 型號： | 74HCMOS147N |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 10-TO-4 LINE PRIORITY ENCODER |
| 中文描述： | 10至4線優(yōu)先編碼器 |
| 文件頁數(shù)： | 2/7頁 |
| 文件大小： | 43K |
| 代理商： | 74HCMOS147N |
December 1990
2
Philips Semiconductors
Product specification
10-to-4 line priority encoder
74HC/HCT147
FEATURES
Encodes 10-line decimal to 4-line BCD
Useful for 10-position switch encoding
Used in code converters and generators
Output capability: standard
I
CC
category: MSI
GENERAL DESCRIPTION
The 74HC/HCT147 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/HCT147 9-input priority encoders accept data
from nine active LOW inputs (A
0
to A
8
) and provide a
binary representation on the four active LOW outputs
(Y
0
to Y
3
). A priority is assigned to each input so that when
two or more inputs are simultaneously active, the input
with the highest priority is represented on the output, with
input line A
8
having the highest priority.
The devices provide the 10-line to 4-line priority encoding
function by use of the implied decimal “zero”. The “zero” is
encoded when all nine data inputs are HIGH, forcing all
four outputs HIGH.
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 A
n
to Y
n
input capacitance
power dissipation capacitance per package
C
L
= 15 pF; V
CC
= 5 V
15
3.5
30
17
3.5
33
ns
pF
pF
notes 1 and 2
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 74HCT00 | 制造商:HAR 功能描述:74HCT00 制造商:NTE Electronics 功能描述: |
| 74HCT00AN | 制造商:AVX Corporation 功能描述: |
| 74HCT00BQ | 制造商:NXP Semiconductors 功能描述:IC QUAD 2 I/P NAND GATE 14-D |
| 74HCT00BQ,115 | 功能描述:邏輯門 QUAD 2-INPUT NAND RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
| 74HCT00BQ-G | 功能描述:邏輯門 QUAD 2-INPUT NAND RoHS:否 制造商:Texas Instruments 產(chǎn)品:OR 邏輯系列:LVC 柵極數(shù)量:2 線路數(shù)量（輸入/輸出）:2 / 1 高電平輸出電流:- 16 mA 低電平輸出電流:16 mA 傳播延遲時間:3.8 ns 電源電壓-最大:5.5 V 電源電壓-最小:1.65 V 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:DCU-8 封裝:Reel |
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