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Infineon Technologies CY7C1009B-15VC — Memory (DRAM / SRAM / Flash / EEPROM)

CY7C1009B-15VC Cypress 1 Mbit Async SRAM, 15 ns, 32-SOJ

MPNCY7C1009B-15VC
Obsolete

Cypress CY7C1009B-15VC asynchronous SRAM, 1 Mbit (128K x 8), 15 ns access time, 4.5 V to 5.5 V supply, 32-SOJ surface-mount package, 0°C to 70°C.

$2.5100Ref. price · indicative, final on quote
Infineon Technologies CY7C1009B-15VC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C1009B-15VC specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Voltage4.5V ~ 5.5V
Memory interfaceParallel
Operating temperature0°C~70°C(TA)
PackageTube
TechnologySRAM - Asynchronous
Access time15 ns
Memory size1Mbit
Memory formatSRAM
Case32-BSOJ (0.300\", 7.62mm Width)
Memory organization128K x 8
Write cycle time - word, page15ns

Product details

15 ns asynchronous SRAM for legacy 5 V buses

The 15 ns access time means it can keep up with fast bus cycles in 5 V DSPs or FPGAs without wait states, as long as the controller's output-enable-to-data-valid timing is within that window.

In a 5 V system running at, say, 33 MHz (30 ns cycle time), a 15 ns access leaves 15 ns for address setup, hold, and any propagation delay through buffers — tight but workable if the PCB trace lengths are kept under 6 inches and the capacitive load on the data bus stays within the SRAM's rated limits. If your controller's address-to-data setup requirement is longer than 15 ns, you will need a slower part — but for most 5 V CPLDs and older 32-bit MCUs, this part keeps the bus moving without wait states.

That rules out outdoor enclosures, unheated warehouses, or engine-bay environments. For a controlled indoor environment like a server room, lab instrument, or office networking gear, the commercial range is fine.

Frequently asked questions

Is CY7C1009B-15VC obsolete?

Yes, the CY7C1009B-15VC is listed as Obsolete. Cypress no longer produces this exact speed grade.

What is the replacement for CY7C1009B-15VC?

Cypress has not announced a direct pin-compatible replacement for the CY7C1009B-15VC. For a drop-in footprint, consider the CY7C1009B-12VC (12 ns access time) if your bus timing can tolerate the faster speed — it shares the same 32-SOJ package and 5 V supply. Otherwise, a cross-search by package and density (1 Mbit, 32-SOJ, 5 V) may yield alternatives from Alliance Memory or ISSI, but verify pin compatibility against the datasheet.

Where to buy CY7C1009B-15VC?

No stock or price is listed here.

CY7C1009B-15VC vs CY7C1009B-12VC: what is the difference?

The only difference is access time: the -15VC is 15 ns, the -12VC is 12 ns. The -12VC is faster and also obsolete. If your bus can handle the tighter timing, the -12VC is a functional substitute; if your design needs the slower 15 ns window, the -15VC is the correct choice.

What is the access time of CY7C1009B-15VC?

The access time is 15 ns for both read and write cycles.

What package does CY7C1009B-15VC come in?

The supplier device package is 32-SOJ.