SN74LS642NS
Texas InstrumentsExtended
0℃~+70℃ 10ns@5V,45pF 12mA 24mA 4.75V~5.25V 74LS Bidirectional Open-drain Schmitt trigger SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHS
- Part id
- ti/SN74LS642NS
- Category
- Buffer, Driver, Transceiver
- Package
- SO-20-208mil
- Pins
- 20
- In stock
- 4 at JLCPCB (C2676094)
Overview
The SN74LS642NS is a buffer, Driver, Transceiver made by Texas Instruments in a SO-20-208mil package with 20 pins. 0℃~+70℃ 10ns@5V,45pF 12mA 24mA 4.75V~5.25V 74LS Bidirectional Open-drain Schmitt trigger SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHS.
PCBKit's library has its KiCad symbol (74xx_IEEE:74LS642, 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. 4 are in stock at JLCPCB (part C2676094).
Symbol
Footprint
Pinout
20| Pin | Name | Type |
|---|---|---|
| 1 | GAB | Input |
| 2 | A0 | Tri-state |
| 3 | A1 | Tri-state |
| 4 | A2 | Tri-state |
| 5 | A3 | Tri-state |
| 6 | A4 | Tri-state |
| 7 | A5 | Tri-state |
| 8 | A6 | Tri-state |
| 9 | A7 | Tri-state |
| 10 | GND | Power in |
| 11 | B7 | Tri-state |
| 12 | B6 | Tri-state |
| 13 | B5 | Tri-state |
| 14 | B4 | Tri-state |
| 15 | B3 | Tri-state |
| 16 | B2 | Tri-state |
| 17 | B1 | Tri-state |
| 18 | B0 | Tri-state |
| 19 | GBA | Input |
| 20 | VCC | Power in |
Parts like it
8
SN74HC540NS
SO-20-208mil-40℃~+85℃ 20ns@4.5V,50pF 2V~6V 7.8mA 7.8mA 74HC 80uA Tri-State SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74ALVC244NSR
SO-20-208mil-40℃~+85℃ 1 1.65V~3.6V 10uA 2.8ns@3.3V,50pF 24mA 24mA 4 ALVC Output enable Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74AC244MNSREP
SO-20-208mil-55℃~+125℃ 2 24mA 24mA 2V~6V 4 5ns@5.5V,50pF 74AC 80uA Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74LS240NS
SO-20-208mil0℃~+70℃ 1 12mA 24mA 4.75V~5.25V 54mA 74LS 8 9ns@5V,45pF Output enable、Level shifting Schmitt trigger Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74ALVC245NSR
SO-20-208mil-40℃~+85℃ 1 1.65V~3.6V 10uA 24mA 24mA 3.4ns@3.3V,50pF 74ALVC 8 Bidirectional Output enable StandardCMOS Tri-State SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74AHCT244NS
SO-20-208mil-40℃~+125℃ 13ns@5V,50pF 2 4 4.5V~5.5V 40uA 74AHCT 8mA 8mA Edge rate controllable、Output enable、Level shifting Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74ABT244ANS
SO-20-208mil-40℃~+85℃ 2 2.6ns@5V,50pF 250uA 32mA 4 4.5V~5.5V 64mA 74ABT Output enable Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/TransceiverSN74ABT640NS
SO-20-208mil-40℃~+85℃ 1 250uA 32mA 4.5V~5.5V 4.9ns@5V,50pF 64mA 74ABT Tri-State Unidirectional SO-20-208mil Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffer/Driver/Transceiver
Questions
Is there a KiCad symbol and footprint for the SN74LS642NS?
Yes. The symbol is 74xx_IEEE:74LS642 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 SN74LS642NS?
SO-20-208mil, with 20 pins. Its footprint is drawn on this page.
Where is the SN74LS642NS datasheet?
Texas Instruments publishes it: the Datasheet link on this page opens it.
Where can I order the SN74LS642NS?
JLCPCB lists it as part C2676094, with 4 in stock; the sellers' links on this page open their listings.
What can replace the SN74LS642NS?
Parts like it in the library: the SN74HC540NS by Texas Instruments, the SN74ALVC244NSR by Texas Instruments, the SN74AC244MNSREP by Texas Instruments and the SN74LS240NS by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.