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Infineon Technologies CY7C109B-20ZC — Memory (DRAM / SRAM / Flash / EEPROM)

CY7C109B-20ZC Infineon 1Mbit Async SRAM 20 ns TSOP I

MPNCY7C109B-20ZC
Obsolete

Infineon CY7C109B-20ZC, 1Mbit (128K x 8) asynchronous SRAM, 20 ns access time, 4.5V–5.5V supply, 0°C to 70°C, 32-TSOP I package, parallel interface.

$2.4000Ref. price · indicative, final on quote
Infineon Technologies CY7C109B-20ZC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C109B-20ZC specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Memory interfaceParallel
Operating temperature0°C ~ 70°C (TA)
PackageBag
TechnologySRAM - Asynchronous
Access time20 ns
Memory size1Mbit
Memory formatSRAM
Case32-TFSOP (0.724\", 18.40mm Width)
Memory organization128K x 8
Write cycle time - word, page20ns

Product details

20 ns asynchronous SRAM, 128K x 8, 5V supply

It uses a parallel interface and is housed in a 32-TSOP I (32-TFSOP, 0.724" body width) surface-mount package.

Infineon lists the CY7C109B-20ZC as Obsolete. Confirm the package variant (32-TSOP I) and the 5V supply rail before committing.

20 ns timing and bus-margin fit

The 20 ns access time sets the read-cycle ceiling for the memory bus. In a system originally designed around this part, a slower replacement would stretch the bus cycle and may violate setup/hold margins at the controller side.

Frequently asked questions

Is there a direct replacement for the CY7C109B-20ZC?

Infineon has not published an official successor for the CY7C109B-20ZC. A pin-compatible alternative would need to match the 32-TSOP I package, 128K x 8 organization, 5V supply, and 20 ns or faster access time. Without a manufacturer cross-reference, verify any candidate against the original PCB footprint and timing budget.