Datasheet > 74ALS245

74ALS245

更新时间： 2024-11-03 22:53:15

品牌	Logo	应用领域
飞兆/仙童 - FAIRCHILD		总线收发器
页数	文件大小	规格书
6页	76K
描述
Octal 3-STATE Bus Transceiver

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数据手册

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74ALS245 数据手册

September 1986

Revised February 2000

DM74ALS245A

Octal 3-STATE Bus Transceiver

General Description

Features

This advanced low power Schottky device contains 8 pairs

of 3-STATE logic elements configured as octal bus trans-

ceivers. These circuits are designed for use in memory,

microprocessor systems and in asynchronous bidirectional

data buses. Two way communication between buses is

controlled by the (DIR) input. Data transmits either from the

A bus to the B bus or from the B bus to the A bus. Both the

driver and receiver outputs can be disabled via the (G)

enable input which causes outputs to enter the high imped-

ance mode so that the buses are effectively isolated.

■ Advanced oxide-isolated, ion-implanted Schottky TTL

process

■ Non-inverting logic output

■ Glitch free bus during power up and down

■ 3-STATE outputs independently controlled on A and B

buses

■ Low output impedance to drive terminated transmission

lines to 133Ω

■ Switching response specified into 500Ω/50 pF

■ Specified to interface with CMOS at V_OH= V_CC− 2V

■ PNP inputs to reduce input loading

■ Switching specifications guaranteed over full tempera-

ture and V_CCrange

Ordering Code:

Order Number

DM74ALS245AWM

DM74ALS245ASJ

DM74ALS245AMSA

DM74ALS245AN

Package Number

M20B

Package Description

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide

M20D

MSA20

N20A

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Connection Diagram

Function Table

Control

Inputs

Operation

DIR

B Data to A Bus

A Data to B Bus

Hi-Z

H = HIGH Logic Level

L = LOW Logic Level

X = Either HIGH or LOW Logic Level

DS006213

www.fairchildsemi.com

12 3 4 5 6

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74ALS245A	NXP	获取价格	Octal transceiver 3-State
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74ALS245A-1D	ETC	获取价格	Single 8-bit Bus Transceiver
74ALS245A-1DB	NXP	获取价格	Octal transceiver 3-State
74ALS245A-1DB-T	NXP	获取价格	IC ALS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, Bus Driver/Transceiver
74ALS245A-1N	NXP	获取价格	Octal transceiver 3-State
74ALS245AD	NXP	获取价格	Octal transceiver 3-State
74ALS245ADB	NXP	获取价格	Octal transceiver 3-State
74ALS245ADB-T	NXP	获取价格	IC ALS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, Bus Driver/Transceiver
74ALS245AD-T	NXP	获取价格	IC ALS SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDSO20, Bus Driver/Transceiver