SN54LS147

更新时间： 2024-11-28 23:06:11

品牌	Logo	应用领域
摩托罗拉 - MOTOROLA		编码器
页数	文件大小	规格书
7页	234K
描述
10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS

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中文翻译

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数据手册

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SN54LS147 数据手册

SN54/74LS147

SN54/74LS148

SN54/74LS748

10-LINE-TO-4-LINE

AND 8-LINE-TO-3-LINE

PRIORITY ENCODERS

The SN54/74LS147 and the SN54/74LS148 are Priority Encoders. They

provide priority decoding of the inputs to ensure that only the highest order

data line is encoded. Both devices have data inputs and outputs which are

active at the low logic level.

The LS147 encodes nine data lines to four-line (8-4-2-1) BCD. The implied

decimal zero condition does not require an input condition because zero is

encoded when all nine data lines are at a high logic level.

10-LINE-TO-4-LINE

AND 8-LINE-TO-3-LINE

PRIORITY ENCODERS

LOW POWER SCHOTTKY

The LS148 encodes eight data lines to three-line (4-2-1) binary (octal). By

providing cascading circuitry (Enable Input EI and Enable Output EO) octal

expansion is allowed without needing external circuitry.

The SN54/74LS748 is a proprietary Motorola part incorporating a built-in

deglitcher network which minimizes glitches on the GS output. The glitch

occurs on the negative going transition of the EI input when data inputs 0–7

are at logical ones.

The only dc parameter differences between the LS148 and the LS748 are

that (1) Pin 10 (input 0) has a fan-in of 2 on the LS748 versus a fan-in of 1 on

the LS148; (2) Pins 1, 2, 3, 4, 11, 12 and 13 (inputs 1, 2, 3, 4, 5, 6, 7) have a

fan-in of 3 on the LS748 versus a fan-in of 2 on the LS148.

J SUFFIX

CERAMIC

CASE 620-09

N SUFFIX

PLASTIC

CASE 648-08

The only ac difference is that t

45 ns.

from EI to EO is changed from 40 to

PHL

SN54/74LS147

(TOP VIEW)

D SUFFIX

SOIC

CASE 751B-03

ORDERING INFORMATION

SN54LSXXXJ Ceramic

SN74LSXXXN Plastic

SN74LSXXXD SOIC

SN54/74LS148

SN54/74LS748

(TOP VIEW)

FAST AND LS TTL DATA

5-245

12 3 4 5 6 7

中文翻译

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与SN54LS147相关器件

型号	品牌	获取价格	描述	数据表
SN54LS147FK	TI	获取价格	10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
SN54LS147FK	ROCHESTER	获取价格	Encoder, LS Series, 9-Bit, TTL, CQCC20, LCC-20
SN54LS147J	ROCHESTER	获取价格	Encoder, LS Series, 9-Bit, TTL, CDIP16, DIP-16
SN54LS147J	TI	获取价格	10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
SN54LS147J	MOTOROLA	获取价格	10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
SN54LS147J-00	TI	获取价格	LS SERIES, 9-BIT ENCODER, CDIP16
SN54LS147JD	MOTOROLA	获取价格	Encoder, LS Series, 9-Bit, TTL, CDIP16, CERAMIC, DIP-16
SN54LS147W	TI	获取价格	10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
SN54LS147W	ROCHESTER	获取价格	Encoder, LS Series, 9-Bit, TTL, CDFP16, DFP-16
SN54LS147W-00	TI	获取价格	LS SERIES, 9-BIT ENCODER, CDFP16