2pcs Intel D3621 1024-bit (256 x 4) PROMs Tri-state for Apple 1 replica

Description

This listing is for 2 pieces of the 16 pin ceradip D3621 in factory carrier!
Date Code may vary but generally 7641 assembled in Hong Kong
These would be suitable for use in Apple 1 replicas
and are mentioned (incorrectly) in the Apple 1 manual as 3601
that is the open collector version.
I have about 50 of these.
I also have around 30 pieces of the D3622
that is the 512 x 4 bit version
that also can be used as a 256 x 4 bit I think.
So if you want a specific quantity of any of these,
please contact me and ask for a quote.
Intel i3621
1024-bit (256 x 4) PROM
1975
Specifications
• 1024-bit (256 x 4) PROM
• Bipolar (3xxx)
• Low Power Dissipation: 0.5 mW/Bit Typical
• Open Collector (3601) and Three-State Outputs (3621)
• Fast Programming: 1 ms/Bit Typically
• Polycrystalline Silicon Fuse
• Three-State Output
• 16-pin Dual In-Line Package
3621 70ns 685mW +5
The Intel® 3601/3621 is a 1024-bit PROM ideally suited for uses where fast turn-around and pattern
experimentation are important, such as in prototypes or in small productions volume systems. The 3601 is
manufactured with all outputs low, and logic high output levels can be electrically programmed in selected
bit locations. The 3621 has its outputs initially high and logic low output levels are programmed. The
same address inputs are used for both programming and reading.
The 3601/3621 is manufactured with the highly reliable polycrystalline silicon fuse and the fast switching
Schottky barrier diode technology [4].
Taken from:
The Collector’s guide to
Vintage Intel Microchips
4th Edition
George M. Phillips Jr.
I also have many MMI 3600J and 3600D
but these are open collector versions.
You might/must add a pull-up resistor pack
for these to work in your APPLE 1
although I'm not certain that the bus supports
a greater sink current.