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

Cypress CY7C1021B-12VXCT SRAM, 1Mbit, 12 ns, 44-SOJ

MPNCY7C1021B-12VXCT
Obsolete

Cypress CY7C1021B-12VXCT, asynchronous SRAM, 1Mbit (64K x 16), 12 ns access time, 4.5 V ~ 5.5 V supply, parallel interface, 44-SOJ package, 0 °C to 70 °C commercial temperature.

Infineon Technologies CY7C1021B-12VXCT datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C1021B-12VXCT specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Voltage4.5V ~ 5.5V
Memory interfaceParallel
Operating temperature0°C~70°C(TA)
PackageTape & Reel (TR)
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

The CY7C1021B-12VXCT is a 1 Mbit asynchronous SRAM organized as 64K words by 16 bits. It operates from a 4.5 V to 5.5 V supply and delivers a 12 ns access time.

12 ns access time — timing margin for the bus

The 12 ns access time is the part's headline speed rating.

64K x 16 organization — why the x16 width matters

The 64K x 16 organization connects directly to a 16-bit data bus without byte-lane multiplexing. The 44-SOJ package keeps the pin count manageable for a x16 memory.

Obsolete — sourcing reality for the BOM line

No factory orders are accepted. The part is available only through surplus and independent distribution channels. No official successor has been named by Cypress; any replacement must be evaluated on pin-compatibility and timing.

This covers indoor equipment, office electronics, and telecom racks in climate-controlled spaces.

Frequently asked questions

Is CY7C1021B-12VXCT obsolete?

Yes, the CY7C1021B-12VXCT is officially Obsolete per Cypress's lifecycle status. It is no longer in production and must be sourced from surplus or independent distribution.

What is the replacement for CY7C1021B-12VXCT?

Cypress has not published an official direct replacement for the CY7C1021B-12VXCT. Any alternative must be evaluated on pin-compatibility, supply voltage (5 V), and 12 ns access time. Parts in the CY7C1021 family with a different suffix may have the same die but differ in package or temperature grade.

What is the pinout and package of CY7C1021B?

The CY7C1021B-12VXCT comes in a 44-SOJ package (44-BSOJ, 0.400" body width, 10.16 mm width). It is a surface-mount, J-bend package. The pinout is standard for a 64K x 16 asynchronous SRAM with separate address, data, chip enable, output enable, and write enable signals.

What is the datasheet for CY7C1021B-12VXCT?

The datasheet for the CY7C1021B-12VXCT covers the full CY7C1021B family. It includes the 12 ns access time, 4.5 V to 5.5 V supply range, 64K x 16 organization, and 44-SOJ package mechanical drawings.