
RAMBoard
chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines
Texas InstrumentsExtended
-40℃~+85℃ 1 24mA 24mA 4.5V~5.5V 74ACT 8 Tri-State PDIP-20 Buffers, Drivers, Receivers, Transceivers ROHS
The SN74ACT245N is a buffers, Drivers, Receivers, Transceiver made by Texas Instruments in a PDIP-20 package with 20 pins. -40℃~+85℃ 1 24mA 24mA 4.5V~5.5V 74ACT 8 Tri-State PDIP-20 Buffers, Drivers, Receivers, Transceivers ROHS.
PCBKit's library has its KiCad symbol (74xx:74HC245, from KiCad's library) and its footprint (Package_DIP:DIP-20_W7.62mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C1548350). 1 open-source board in 1 repository on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | A->B | 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 | CE | Input |
| 20 | VCC | Power in |

chregu82/ISA_1MB_RAM_Board
DIY 8 Bit ISA Slot RAM Board with 1 Megabyte SRAM for XT machines
Yes. The symbol is 74xx:74HC245 and the footprint Package_DIP:DIP-20_W7.62mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
PDIP-20, with 20 pins. Its footprint is drawn on this page.
Texas Instruments publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C1548350, with 0 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the 74HC541D by GR, the SN74HC240N(XBLW) by XBLW, the SN74HC244N(XBLW) by XBLW and the 74HC245N by HGSEMI. Check their datasheets: a part that fits the footprint may still differ in its ratings.
1 board in 1 repository on GitHub; the most starred are listed on this page, with their KiCad files.