參數(shù)資料
型號(hào)： 74148
廠商： Texas Instruments, Inc.
英文描述： 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
中文描述： 10線的4線和8線三線優(yōu)先編碼器
文件頁(yè)數(shù)： 2/22頁(yè)
文件大?。?/td> 623K
代理商： 74148
SDLS053B OCTOBER 1976 REVISED MAY 2004
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information
These TTL encoders feature priority decoding of the inputs to ensure that only the highest-order data line is
encoded. The ’147 and ’LS147 devices encode nine data lines to four-line (8-4-2-1) BCD. The implied decimal
zero condition requires no input condition, as zero is encoded when all nine data lines are at a high logic level.
The ’148 and ’LS148 devices encode eight data lines to three-line (4-2-1) binary (octal). Cascading circuitry
(enable input EI and enable output EO) has been provided to allow octal expansion without the need for external
circuitry. For all types, data inputs and outputs are active at the low logic level. All inputs are buffered to represent
one normalized Series 54/74 or 54/74LS load, respectively.
ORDERING INFORMATION
TA
PACKAGE
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP N
Tube
SN74LS148N
SN74LS148N
0
°
C to 70
°
C
SOIC D
Tube
SN74LS148D
LS148
Tape and reel
SN74LS148DR
SOP NS
Tape and reel
SN74LS148NSR
74LS148
CDIP J
Tube
SNJ54LS148J
SNJ54LS148J
55 C to 125 C
CFP W
LCCC FK
Tube
Tube
SNJ54LS148W
SNJ54LS148FK
SNJ54LS148W
SNJ54LS148FK
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE ’147, ’LS147
INPUTS
OUTPUTS
1
2
3
4
5
6
7
8
9
D
C
B
A
H
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
X
L
L
H
H
L
X
X
X
X
X
X
X
L
H
L
H
H
H
X
X
X
X
X
X
L
H
H
H
L
L
L
X
X
X
X
X
L
H
H
H
H
L
L
H
X
X
X
X
L
H
H
H
H
H
L
H
L
X
X
X
L
H
H
H
H
H
H
L
H
H
X
X
L
H
H
H
H
H
H
H
H
L
L
X
L
H
H
H
H
H
H
H
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H = high logic level, L = low logic level, X = irrelevant
相關(guān)PDF資料
PDF描述
74LS147 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
74LS148 8-line-to-3-line Octal Priority Encoders
74LS148 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
74LS148 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
74LS14 Hex Schmitt Trigger Inverters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
74148(ECA) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:-Priori曲回nkoder Priority encoder En∞d劇r de priorité Codif陽(yáng)陽(yáng)re di priorità
74148DC 制造商:Texas Instruments 功能描述:
74148PC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Logic IC
7414A 制造商:Belden Inc 功能描述:UNSHLD MULTICOND CABLE 9COND 18AWG 600V, No. of Conductors:9, Conductor Size AWG
7414A 008250 制造商:Belden Inc 功能描述:Multiconductor Automation & Control Cabl
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