NEO-253: Difference between revisions
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{{ChipInfo | |||
|picture=Neo-253.jpg | |||
|pkg=QFP64R | |||
|manu=fujitsu | |||
|date=1992 ? | |||
|gates= | |||
|used_on={{PCB|SLOT4F}} | |||
}} | |||
Quintuple 74HC253 4-to-1 multiplexers with common select lines, making 10 switches in one chip. | Quintuple 74HC253 4-to-1 multiplexers with common select lines, making 10 switches in one chip. | ||
Revision as of 09:57, 30 August 2016
| |
| Package | QFP64R |
| Manufacturer | 
|
| First use | 1992 ? |
| Used on | SLOT4F |
Quintuple 74HC253 4-to-1 multiplexers with common select lines, making 10 switches in one chip.
Only (?) used on second revision 4-slot MVS systems. Not to be confused with the more common NEO-273.
Pinout
OpenOffice Draw file: File:Neo-253.odg
Select signals come from NEO-F0 SLOTA and SLOTB.
Todo: 10 and 42 are GND
SLOT4F @ 5E
- Mux 10~3: SDD7~SDD0
- Mux 2: PWAIT1
- Mux 1: PWAIT0
- Outputs go to CN9