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Infineon Technologies CY7C1021B-12VC — Memory (DRAM / SRAM / Flash / EEPROM)

CY7C1021B-12VC Cypress 1Mbit Async SRAM, 12 ns, 44-SOJ

MPNCY7C1021B-12VC
Obsolete

Cypress CY7C1021B-12VC, 1Mbit asynchronous SRAM, 64K x 16 organization, 12 ns access time, parallel interface, 4.5V-5.5V supply, 0°C-70°C, 44-SOJ package, Tube.

Infineon Technologies CY7C1021B-12VC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C1021B-12VC specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Memory interfaceParallel
Operating temperature0°C~70°C(TA)
PackageTube
TechnologySRAM - Asynchronous
Access time12 ns
Memory size1Mbit
Memory formatSRAM
Case44-BSOJ (0.400\", 10.16mm Width)
Memory organization64K x 16
Write cycle time - word, page12ns

Product details

12 ns asynchronous SRAM — what the access time buys you

The Cypress CY7C1021B-12VC is a 1Mbit asynchronous SRAM organized as 64K x 16 bits, with a 12 ns access time that sets the bus-cycle floor for the memory interface. At 12 ns, this part keeps up with fast 16-bit microcontrollers and DSPs without inserting wait states, provided the address-to-data path stays within the timing budget. The write cycle time matches the read access at 12 ns, so back-to-back writes do not stall the bus. Supply range is 4.5V to 5.5V, which aligns with legacy 5 V logic families.

The 44-SOJ surface-mount package (10.16 mm body width) is a legacy footprint; verify the existing board's SOJ land pattern before committing the BOM.

Frequently asked questions

Is CY7C1021B-12VC obsolete and what is the replacement?

Yes, Cypress has marked the CY7C1021B-12VC as Obsolete. For a BOM line needing this exact part, the supply path is through independent distribution — last-time-buy inventory or surplus stock. If the design can accommodate a different package, a newer asynchronous SRAM may be an alternative, but no pin-compatible drop-in is documented here.