From c34e32dc55f73ce67a1f52ec4368ec4bdcb6c6f7 Mon Sep 17 00:00:00 2001 From: akuker <34318535+akuker@users.noreply.github.com> Date: Fri, 11 Feb 2022 20:20:38 -0600 Subject: [PATCH] Updated Transceiver Comparison (markdown) --- Transceiver-Comparison.md | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/Transceiver-Comparison.md b/Transceiver-Comparison.md index 6c707fd..b74e387 100644 --- a/Transceiver-Comparison.md +++ b/Transceiver-Comparison.md @@ -131,6 +131,21 @@ Switched by `PI-IND`: > ATN, ACK, RST, SEL + + +# Detailed discusison/comparison + +[Wikipedia list of 74xx logic parts](https://en.wikipedia.org/wiki/List_of_7400-series_integrated_circuits#74x200_%E2%80%93_74x299) + +| Product | Chip and Datasheet | Cost ($) | Qty needed | Notes | +| - | - | - | - | - | +| RaSCSI Original Version | [SN74LS641-1](https://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS641-1DW?qs=SL3LIuy2dWxXHvPKLk%252BfLw%3D%3D) | 3.30 | 4 | VCC is 5v | + +|Part number | Units | Description | Input | Output | Pins | Datasheet| +| ------------- | ----- | ------------- | ----- | ------------- | ----- | ---------| +| 74x245 | 8 | octal bus transceiver, non-inverting outputs | Schmitt trigger | three-state | 20 | SN74LS245 | +| 74x641 | 1 | octal bus transceiver, non-inverting outputs | | open-collector | 20 | SN74LS641 | + ### Notes (1) [Comment by `saybur`](https://68kmla.org/forums/index.php?app=forums&module=forums&controller=topic&id=30399&page=7&tab=comments#comment-646496)