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Infineon Technologies CY7C1399B-15VXI — Memory (DRAM / SRAM / Flash / EEPROM)

Cypress CY7C1399B-15VXI 256Kbit Async SRAM, 15 ns Access

MPNCY7C1399B-15VXI
Obsolete

Cypress CY7C1399B-15VXI, 256Kbit asynchronous SRAM, 32K×8 organization, 15 ns access time, 3 V–3.6 V supply, 28-SOJ surface-mount, -40°C to 85°C.

$0.6700Ref. price · indicative, final on quote
Infineon Technologies CY7C1399B-15VXI datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C1399B-15VXI specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Supply voltage3V ~ 3.6V
Memory interfaceParallel
Operating temperature-40°C~85°C(TA)
PackageTube
TechnologySRAM - Asynchronous
Access time15 ns
Memory size256Kbit
Memory formatSRAM
Case28-BSOJ (0.300\", 7.62mm Width)
Memory organization32K x 8
Write cycle time - word, page15ns

Product details

The CY7C1399B-15VXI is a 256Kbit asynchronous SRAM organized as 32K x 8 bits, with a 15 ns access time and a parallel memory interface.

15 ns access — what it buys on the bus

A 15 ns access time means the SRAM can complete a read-to-data-valid cycle in 15 ns max.

Obsolete — sourcing the CY7C1399B-15VXI today

This part is officially obsolete per Cypress (now Infineon). No last-time-buy window remains open. No manufacturer-direct production is available. If you are freezing a new design, look at the active 28-SOJ asynchronous SRAM family from Cypress/Infineon or ISSI — but verify pinout and timing compatibility; the 32K x 8 organization and 15 ns speed grade are the constraints.

Package and footprint — 28-SOJ

The 28-SOJ package has a 0.300 inch body width, 7.62 mm.

Frequently asked questions

What is the closest pin-compatible alternative to CY7C1399B-15VXI?

There is no single official Cypress/Infineon pin-compatible replacement listed for this obsolete part. For a new design, evaluate active 32K x 8 asynchronous SRAMs in 28-SOJ from ISSI (e.g., IS61LV2568AL) or Alliance Memory, but verify supply voltage range (3 V–3.6 V) and 15 ns access time against your controller's timing budget.