Macintosh-HW
/
RASCSI
mirror of https://github.com/akuker/RASCSI.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Adding SN74ALS245A-1 to comparison table

PhrAx 2020-09-05 22:42:58 -07:00
parent 556017a209
commit 8821f7c9f2
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Transceiver-Comparison.md

@ -9,6 +9,7 @@ The original RaSCSI uses the [SN74LS641](https://www.ti.com/lit/ds/symlink/sn74l
| Unsuitable | [74AHC245](https://datasheet.lcsc.com/szlcsc/Nexperia-74AHCT245PW-118_C173388.pdf) | [0.22](https://lcsc.com/product-detail/74-Series_Nexperia-74AHCT245PW-118_C173388.html) | 4 | VCC is 5v. Datasheet reads input clamping current -20mA |
| Unsuitable | [SN74LS245DW](https://www.ti.com/lit/ds/symlink/sn74ls245.pdf?HQS=TI-null-null-mousermode-df-pf-null-wwe&ts=1599280883179&ref_url=https%253A%252F%252Fwww.mouser.ca%252F) | 1.34| 4 | Can only sink 24mA, SCSI protocol requires 48mA |
| Unsuitable| [SN7406DRG4](https://www.ti.com/lit/ds/symlink/sn7406.pdf?HQS=TI-null-null-digikeymode-df-pf-null-wwe&ts=1599282149626)| 1.34 | 4 | Can only sink 40mA. Will require new layout and increase in chip count as it has less i/o than above. |
| Potential Candidate | [SN74ALS245A-1](https://www.ti.com/lit/ds/symlink/sn74als245a.pdf) | 1.49 | 4 | VCC 5v, -1 unit will sink 48mA |
Note: as of 2020-08-04 the **SN74LS641-1** is the transceiver suggested when building the RaSCSI.