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74LS245 PDF预览

74LS245

更新时间： 2024-11-18 04:28:55
品牌 Logo 应用领域
德州仪器 - TI 总线收发器输出元件
页数 文件大小 规格书
18页 565K
描述
OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

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74LS245 数据手册

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SN54LS245, SN74LS245  
OCTAL BUS TRANSCEIVERS  
WITH 3-STATE OUTPUTS  
SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002  
SN54LS245 . . . J OR W PACKAGE  
SN74LS245 . . . DB, DW, N, OR NS PACKAGE  
(TOP VIEW)  
3-State Outputs Drive Bus Lines Directly  
PNP Inputs Reduce dc Loading on Bus  
Lines  
Hysteresis at Bus Inputs Improves Noise  
Margins  
DIR  
A1  
1
2
3
4
5
6
7
8
9
10  
20  
19  
18  
17  
16  
15  
14  
13  
12  
11  
V
CC  
OE  
B1  
B2  
B3  
B4  
B5  
B6  
B7  
B8  
A2  
Typical Propagation Delay Times Port to  
Port, 8 ns  
A3  
A4  
A5  
I
I
OL  
OH  
TYPE  
(SINK  
A6  
(SOURCE  
CURRENT)  
CURRENT)  
A7  
SN54LS245  
SN74LS245  
12 mA  
24 mA  
–12 mA  
–15 mA  
A8  
GND  
SN54LS245 . . . FK PACKAGE  
(TOP VIEW)  
description  
These octal bus transceivers are designed for  
asynchronous two-way communication between  
data buses. The control-function implementation  
minimizes external timing requirements.  
3
2
1
20 19  
18  
B1  
B2  
B3  
B4  
B5  
A3  
A4  
A5  
A6  
A7  
4
5
6
7
8
The devices allow data transmission from the  
A bus to the B bus 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 disable the device so that the  
buses are effectively isolated.  
17  
16  
15  
14  
9 10 11 12 13  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
PDIP – N  
Tube  
SN74LS245N  
SN74LS245N  
Tube  
SN74LS245DW  
SN74LS245DWR  
SN74LS245NSR  
SN74LS245DBR  
SN54LS245J  
SOIC – DW  
LS245  
0°C to 70°C  
Tape and reel  
Tape and reel  
Tape and reel  
Tube  
SOP – NS  
74LS245  
SSOP – DB  
LS245  
SN54LS245J  
SNJ54LS245J  
SNJ54LS245W  
SN54LS245FK  
CDIP – J  
Tube  
SNJ54LS245J  
SNJ54LS245W  
SN54LS245FK  
–55°C to 125°C  
CFP – W  
Tube  
LCCC – FK  
Tube  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design  
guidelines are available at www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2002, Texas Instruments Incorporated  
On products compliant to MIL-PRF-38535, all parameters are tested  
unless otherwise noted. On all other products, production  
processing does not necessarily include testing of all parameters.  
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.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...18

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