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1.1k 10-pin Resister Pack supplier (or alternative values)?
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- Subject: 1.1k 10-pin Resister Pack supplier (or alternative values)?
- From: Paul Birkel <pbi...@gmail.com>
- Date: Wed, 20 Jun 2012 01:31:37 -0400
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The S-100 MSDOS Board, Z80A Master CPU Board, and Serial I/O Board all
specify the use of a 1.1k 10-pin Resister Pack.
This seems to be an uncommon part. Is there a recommended supplier?
Alternatively, is the value critical in these three board-uses?
The S-100 MS-DOS Board uses a pair of packs (RR7/8) as input pull-up
resistors on the two 74LS165 address decoders. The Z80A Master CPU
Board similarly uses three packs (RR3/4/7) as input pull-up resistors
on its three 74LS165 address decoders. It seems to me that in this
use the values are fairly non-critical. What is the recommended,
commonly-available, alternative resistor value?
The Serial I/O Board is a bit more complicated. It uses a single pack
(RR1) which connects to PU1K-A thru PU1K-I.
1. PU1K-A/B/C are used on the Z8530 UART_INT*, UART_IEI, and
UART_INTA, apparently as input pull-ups.
2. PU1K-E/F are used as pull-ups on two outputs of a
open-collector 74LS06N (the other 4 outputs are spares).
3. The remaining 4 pack-resistors are spared.
Given this mixed-use, what would be the recommended,
commonly-available, alternative resistor value? Or should I consider
hand-wiring single resistors in each case -- and then what would be
the recommended values in each case (UART input pullups; o.c.