參數(shù)資料
型號(hào)： SN74AS638ADW
廠商： Texas Instruments, Inc.
元件分類： 通用總線功能
英文描述： Analog Multiplexer/ Demultiplexer; Package: TSSOP-16; No of Pins: 16; Container: Rail; Qty per Container: 96
中文描述： 八進(jìn)制總線收發(fā)器
文件頁數(shù)： 1/7頁
文件大?。?/td> 115K
代理商： SN74AS638ADW
SN74ALS638A, SN74ALS639A, SN74AS638A, SN74AS639
OCTAL BUS TRANSCEIVERS
SDAS123A – DECEMBER 1983 – REVISED JANUARY 1995
Copyright
1995, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Bidirectional Bus Transceivers in
High-Density 20-Pin Packages
Choice of True or Inverting Logic
A-Bus Outputs Are Open Collector;
B-Bus Outputs Are 3 State
Package Options Include Plastic
Small-Outline (DW) Packages and
Standard Plastic (N) 300-mil DIPs
DEVICE
A
OUTPUT
B
OUTPUT
LOGIC
SN74ALS638A, SN74AS638A
Open collector
3 state
Inverting
SN74ALS639A, SN74AS639
Open collector
3 state
True
description
These octal bus transceivers are designed for asynchronous two-way communication between open-collector
and 3-state buses. The devices transmit data from the A bus (open-collector) to the B bus (3 state) or from the
B bus to the A bus, depending on the logic level at the direction-control (DIR) input. The output-enable (OE) input
can be used to disable the device so the buses are isolated.
The -1 version of SN74ALS638A is identical to the standard version, except that the recommended maximum
I
OL
is increased to 48 mA.
The SN74ALS638A, SN74ALS639A, SN74AS638A, and SN74AS639 are characterized for operation from 0
°
C
to 70
°
C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
SN74ALS638A
SN74AS638A
SN74ALS639A
SN74AS639
L
L
B data to A bus
B data to A bus
L
H
A data to B bus
A data to B bus
H
X
Isolation
Isolation
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
DW OR N PACKAGE
(TOP VIEW)
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
相關(guān)PDF資料
PDF描述
SN74ALS638ADW OCTAL BUS TRANSCEIVERS
SN74AS640DW Analog Multiplexer/ Demultiplexer; Package: SOEIAJ-16; No of Pins: 16; Container: Tape and Reel; Qty per Container: 2000
SN54AS640FK OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SN54ALS640BFK OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
SN74AS645DWR Quad Analog Switch/Multiplexer/Demultiplexer; Package: SOEIAJ-14; No of Pins: 14; Container: Tape and Reel; Qty per Container: 2000
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SN74AS638AN 功能描述:總線收發(fā)器 Octal Bus Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
SN74AS638ANE4 功能描述:總線收發(fā)器 Octal Bus Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
SN74AS638ANS 制造商:Rochester Electronics LLC 功能描述:- Bulk
SN74AS638ANSR 功能描述:總線收發(fā)器 Octal Bus Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
SN74AS638ANSRE4 功能描述:總線收發(fā)器 Octal Bus Transceiver RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
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