Product Overview
FCB61C65-70P 8K x 8 Fast CMOS SRAM - 70ns 28-Pin DIP, 6264 Drop-In Replacement
Condition
Unused NOS. Leads are clean and unsoldered. Evaluation: Visual inspection only. Function testing not performed. Sourced from legacy electronics supply chain recovery.
Ships same business day from Idaho. Packed carefully.
Product Overview
Philips FCB61C65-70P is an 8K x 8 (64Kbit) fast CMOS static RAM in a 28-pin plastic DIP package. It operates on a 5V supply and follows the JEDEC standard 6264 pinout, making it a direct drop-in for any socket designed for 6264-series SRAM. Access time is 70ns - faster than the common 100ns and 120ns variants it replaces.
Key Features
- Organization: 8,192 x 8 bits (64Kbit total)
- Access time: 70ns
- Supply voltage: 5V DC (±10%)
- Technology: CMOS low-power static RAM
- Package: 28-pin PDIP, 600mil body width
- Pinout: JEDEC standard - compatible with 6264-series sockets
- Replaces 100ns and 120ns 6264 variants; not a reliable substitute for 55ns or faster versions
Applications
- RAM replacement or upgrade in vintage 8-bit and 16-bit home computers
- SRAM repair on JAMMA and Neo-Geo arcade boards
- Memory replacement in legacy industrial controllers (PLCs, CNC systems)
- Hobbyist retro computing builds requiring standard 6264-type SRAM
Frequently Asked Questions
Is this a true drop-in replacement for 6264 SRAM chips?
Yes. The FCB61C65-70P follows the JEDEC standard 6264 pinout and fits any 28-pin DIP socket designed for 6264-series SRAM on a 5V logic board.
Can this replace a slower 100ns or 120ns chip?
Yes. A 70ns chip meets or exceeds the timing requirements of any application specifying 100ns or 120ns access time. It cannot reliably replace chips requiring 55ns or faster access.
Is this compatible with 3.3V systems?
No. The FCB61C65-70P requires a 5V supply. It is not compatible with 3.3V logic environments.
Are the leads clean and suitable for socket installation?
Yes. These are unused NOS units. Leads are unsoldered and undamaged based on visual inspection.
Verify your target system's access time requirement before installation. A 70ns chip covers most vintage and arcade applications, but confirm against your board's specification if 55ns is listed.
