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SN74LS640NS on a board, in 3D

SN74LS640NS

Texas Instruments

0℃~+70℃ 15mA 15ns@5V,45pF 24mA 4.75V~5.25V 74LS Bidirectional Tri-State SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHS

Extended
DatasheetJLCPCBLCSCti/SN74LS640NS
Category
Buffers, Drivers, Receivers, Transceivers
Package
SO-20-208mil
Pins
20

Overview

The SN74LS640NS is a buffers, Drivers, Receivers, Transceiver made by Texas Instruments in a SO-20-208mil package with 20 pins. 0℃~+70℃ 15mA 15ns@5V,45pF 24mA 4.75V~5.25V 74LS Bidirectional Tri-State SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHS.

PCBKit's library has its KiCad symbol (74xx_IEEE:74LS640, from KiCad's library) and its footprint (EasyEDA_Cloud:SO-20_L12.6-W5.3-P1.27-LS7.8-BL, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C2676138).

Symbol

GND10VCC20GAB1A02A13A24A35A46A57A68A79B711B612B513B414B315B216B117B018GBA19
74xx_IEEE:74LS640From KiCad's library

Footprint

1234567891011121314151617181920
EasyEDA_Cloud:SO-20_L12.6-W5.3-P1.27-LS7.8-BLFrom EasyEDA

Parameters

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

Order codes

1

Pinout

20
The pins of the SN74LS640NS
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 SN74LS640NS?

Yes. The symbol is 74xx_IEEE:74LS640 and the footprint EasyEDA_Cloud:SO-20_L12.6-W5.3-P1.27-LS7.8-BL, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SN74LS640NS?

SO-20-208mil, with 20 pins. Its footprint is drawn on this page.

Where is the SN74LS640NS datasheet?

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

Where can I order the SN74LS640NS?

JLCPCB lists it as part C2676138, with 0 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS640NS?

Parts like it in the library: the SN74ACT245NSR by Texas Instruments, the SN74F244NS by Texas Instruments, the SN74HCT541NSR by Texas Instruments and the SN74LVT244BNSR by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8