From 4c7f7dd96a65e2b061e4211ca9154c7ef4ca9535 Mon Sep 17 00:00:00 2001 From: PhrAx <68938882+phrax0@users.noreply.github.com> Date: Fri, 4 Sep 2020 22:06:43 -0700 Subject: [PATCH] Updated Transceiver Comparison (markdown) --- Transceiver-Comparison.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Transceiver-Comparison.md b/Transceiver-Comparison.md index d337426..4176230 100644 --- a/Transceiver-Comparison.md +++ b/Transceiver-Comparison.md @@ -8,7 +8,7 @@ The original RaSCSI uses the [SN74LS641](https://www.ti.com/lit/ds/symlink/sn74l | Scsi2SD - According to [LC-SCSI](https://github.com/pgodwin/LC-SCSI/wiki) | [SN74LVT245B](https://www.mouser.com/ProductDetail/Texas-Instruments/SN74LVT245BPWR?qs=afYny40WCj1v38f4br9Q%2Fg%3D%3D), [Data Sheet](https://www.ti.com/lit/ds/symlink/sn74lvt245b.pdf) | 0.90 | 4 | VCC is 3.3v | | 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 | +| 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. | Note: as of 2020-08-04 the **SN74LS641-1** is the transciever suggested when building the RaSCSI.