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SN74LS642DW on a board, in 3D

SN74LS642DW

Texas Instruments

0℃~+70℃ 15ns@5V,45pF 24mA 4.75V~5.25V 74LS 95mA Bidirectional Open-drain SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHS

Extended
DatasheetJLCPCBLCSCti/SN74LS642DW
Category
Buffer, Driver, Transceiver
Package
SOIC-20-300mil
Pins
20

Overview

The SN74LS642DW is a buffer, Driver, Transceiver made by Texas Instruments in a SOIC-20-300mil package with 20 pins. 0℃~+70℃ 15ns@5V,45pF 24mA 4.75V~5.25V 74LS 95mA Bidirectional Open-drain SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHS.

PCBKit's library has its KiCad symbol (74xx_IEEE:74LS642, from KiCad's library) and its footprint (Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1548144).

Symbol

GND10VCC20GAB1A02A13A24A35A46A57A68A79B711B612B513B414B315B216B117B018GBA19
74xx_IEEE:74LS642From KiCad's library

Footprint

1234567891011121314151617181920
Package_SO:SOIC-20W_7.5x12.8mm_P1.27mmFrom KiCad's library

Parameters

9
Channel Type
Bidirectional
Current - Output Low(IOL)
24mA
Features
Output enable
Logic Family
74LS
Operating Temperature
0℃~+70℃
Propagation Delay
15ns@5V,45pF
Quiescent Current
95mA
Voltage - Supply
4.75V~5.25V
output type
Open-drain

Order codes

1

Pinout

20
The pins of the SN74LS642DW
PinNameType
1GABInput
2A0Tri-state
3A1Tri-state
4A2Tri-state
5A3Tri-state
6A4Tri-state
7A5Tri-state
8A6Tri-state
9A7Tri-state
10GNDPower in
11B7Tri-state
12B6Tri-state
13B5Tri-state
14B4Tri-state
15B3Tri-state
16B2Tri-state
17B1Tri-state
18B0Tri-state
19GBAInput
20VCCPower in

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Questions

Is there a KiCad symbol and footprint for the SN74LS642DW?

Yes. The symbol is 74xx_IEEE:74LS642 and the footprint Package_SO:SOIC-20W_7.5x12.8mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SN74LS642DW?

SOIC-20-300mil, with 20 pins. Its footprint is drawn on this page.

Where is the SN74LS642DW datasheet?

Texas Instruments publishes it: the Datasheet link on this page opens it.

Where can I order the SN74LS642DW?

JLCPCB lists it as part C1548144, with 0 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS642DW?

Parts like it in the library: the 74LVC245AD by Nexperia, the 74LVC244AD by Nexperia, the 74HC240D by Nexperia and the SN74AHC244DW by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8