2 layers327.9 × 139 mm
Coco2
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
147 parts446
Overview
The 74LS273PC is a flip Flop made by onsemi in a PDIP-20 package with 20 pins. 1 15ns 27mA 27ns@5V,15pF 30MHz 5ns 74LS Series 8 D-Type Reset Rising Edge PDIP-20 Flip Flops ROHS.
PCBKit's library has its KiCad symbol (74xx:74LS273, from KiCad's library) and its footprint (Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C3826943). 104 open-source boards in 71 repositories on GitHub use it.
Symbol
Footprint
Order codes
1- 74LS273PCLCSC C3826943
Pinout
20| Pin | Name | Type |
|---|---|---|
| 1 | Mr | Input |
| 2 | Q0 | Output |
| 3 | D0 | Input |
| 4 | D1 | Input |
| 5 | Q1 | Output |
| 6 | Q2 | Output |
| 7 | D2 | Input |
| 8 | D3 | Input |
| 9 | Q3 | Output |
| 10 | GND | Power in |
| 11 | Cp | Input |
| 12 | Q4 | Output |
| 13 | D4 | Input |
| 14 | D5 | Input |
| 15 | Q5 | Output |
| 16 | Q6 | Output |
| 17 | D6 | Input |
| 18 | D7 | Input |
| 19 | Q7 | Output |
| 20 | VCC | Power in |
Open-source boards using it
All 104- 2 layers370.8 × 298.5 mm
8 Bit Computer
The-Invent0r/8-bit-Computer-PCB
These are the KiCAD files for my 8-Bit Computer.
323 parts142 - 4 layers337.6 × 105.7 mm
ISA CGA
hkzlab/CGA_Redux
The Color Graphics Adapter Redux board is a more or less faithful clone of the original IBM CGA, based on the original schematics
170 parts56 - 2 layers310 × 229.8 mm
- 2 layers155.2 × 78.6 mm
80ColumnCard
btb/80ColumnCard
An Apple II 80-Column Card. Based on the Videx Videoterm
47 parts43Apache-2.0 - 2 layers333.2 × 205.9 mm
- 2 layers
- 2 layers118.1 × 99.9 mm
ZX Interface 2021
tebl/ZX-Interface-2.021
An old-school remake of the ZX Interface 2 with some modern tweaks - mainly by integrating bank switching into the interface itself.
58 parts32
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/onsemi/74LS273PC" title="74LS273PC in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/onsemi/74LS273PC.jpg" alt="74LS273PC" width="1200" height="900">[](https://pcbkit.io/parts/onsemi/74LS273PC)Questions
Is there a KiCad symbol and footprint for the 74LS273PC?
Yes. The symbol is 74xx:74LS273 and the footprint Package_DIP:DIP-20_W8.89mm_SMDSocket_LongPads, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the 74LS273PC?
PDIP-20, with 20 pins. Its footprint is drawn on this page.
Where is the 74LS273PC datasheet?
onsemi publishes it: the Datasheet link on this page opens it.
Where can I order the 74LS273PC?
JLCPCB lists it as part C3826943, with 0 in stock; the sellers' links on this page open their listings.
What can replace the 74LS273PC?
Parts like it in the library: the 74HC273N-HX by ZHHXDZ, the 74HC574N-HX by ZHHXDZ, the TC74HC273APF by Toshiba and the CD74AC574E by Texas Instruments. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the 74LS273PC?
104 boards in 71 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
74HC273N-HX
DIP-20-40℃~+125℃ 0ns 1 13ns@6V,50pF 17ns 2V~6V 32MHz 3pF 5.2mA 5.2mA 74HC 8 8uA Asynchronous Reset Rising Edge DIP-20 Flip Flops ROHSZHHXDZFlip Flops74HC574N-HX
DIP-20-40℃~+125℃ 1 160uA 17ns、20ns、100ns 2V~6V 38MHz 3pF 5ns 66ns@4.5V,150pF 7.8mA 7.8mA 74HC 8 Rising Edge Tri-State DIP-20 Flip Flops ROHSZHHXDZFlip FlopsTC74HC273APF
DIP-20-40℃~+85℃ 0ns 1 15ns 25ns@6V,50pF 2V~6V 4uA 5.2mA 5.2mA 5pF 66MHz 74HC Series 8 Asynchronous D-Type Reset Rising Edge DIP-20 Flip Flops ROHSToshibaFlip FlopsCD74AC574E
PDIP-20-55℃~+125℃ 1 1.5V~5.5V 10.8ns@5V,50pF 10pF 125MHz 24mA 24mA 74AC Series 8 8uA D-Type Rising Edge Tri-State PDIP-20 Flip Flops ROHSTexas InstrumentsFlip FlopsCD74HC377E
PDIP-20-55℃~+125℃ 1 10ns 10pF 2V~6V 30ns@6V,50pF 3ns 5.2mA 5.2mA 60MHz 74HC Series 8 8uA D-Type Enable Rising Edge PDIP-20 Flip Flops ROHSTexas InstrumentsFlip Flops74HC374N
DIP-20-40℃~+125℃ 1 28ns@6V,50pF 2V~6V 3.5pF 4ns 4uA 5ns 7.8mA 7.8mA 74HC Series 8 83MHz D-Type Rising Edge Tri-State DIP-20 Flip Flops ROHSNexperiaFlip Flops74AC374PC
PDIP-20-40℃~+85℃ 0ns 1 155MHz 1ns 24mA 24mA 2V~6V 4.5pF 40uA 74AC Series 8 9.5ns@5V,50pF D-Type Rising Edge Tri-State PDIP-20 Flip Flops ROHSonsemiFlip Flops74AC574PC
PDIP-20-40℃~+85℃ 0ns 0ns 1 153MHz 24mA 24mA 2V~6V 4.5pF 40uA 74AC Series 8 9.5ns@5V,50pF D-Type Rising Edge Tri-State PDIP-20 Flip Flops ROHSonsemiFlip Flops