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Infineon Technologies CY7C199-25VC — Memory (DRAM / SRAM / Flash / EEPROM)

Infineon CY7C199-25VC 256Kbit Asynchronous SRAM, 25 ns

MPNCY7C199-25VC
Obsolete

Infineon CY7C199-25VC, 256Kbit (32K x 8) Asynchronous SRAM, Parallel Interface, 25 ns Access Time, 4.5V ~ 5.5V Supply, 0°C ~ 70°C, 28-SOJ (0.300", 7.62mm Width), Tube.

Infineon Technologies CY7C199-25VC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C199-25VC specifications
ParameterValue
Memory typeVolatile
MountingSurface Mount
Supply voltage4.5V ~ 5.5V
Memory interfaceParallel
Operating temperature0°C~70°C(TA)
PackageTube
TechnologySRAM - Asynchronous
Access time25 ns
Memory size256Kbit
Memory formatSRAM
Case28-BSOJ (0.300\", 7.62mm Width)
Memory organization32K x 8
Write cycle time - word, page25ns

Product details

256Kbit asynchronous SRAM for legacy 5V bus designs

The Infineon CY7C199-25VC is a 256Kbit asynchronous SRAM organized as 32K x 8 bits, with a parallel interface and a 25 ns access time.

25 ns access — timing margin for fast 5V buses

The 25 ns access time matches the read-cycle window of many 5V CPLDs, 8051-class MCUs, and legacy DSPs without wait states. If your bus runs at 33 MHz or slower, this part gives you at least 5 ns of timing margin after accounting for PCB trace delay and output load.

The CY7C199-25VC is marked obsolete by Infineon.

28-SOJ footprint — board-level fit

This is the same footprint used by many 32K x 8 SRAMs from the 1990s and 2000s, so a board originally laid out for a compatible SOJ-28 device can accept this part without a layout change.

Frequently asked questions

What is the replacement for CY7C199-25VC?

Infineon has not listed an official successor for the CY7C199-25VC. For a pin-compatible alternative in the same 32K x 8 asynchronous SRAM family, consider the CY7C199-15VC or CY7C199-20VC (faster access times) — verify timing compatibility with your bus. These are also obsolete and sourced through independent distribution.

Is CY7C199-25VC compatible with 5V logic?

It is directly compatible with 5V TTL and CMOS buses without level translation.

What is the access time of CY7C199-25VC?

The access time is 25 ns for both read and write cycles.

What package does CY7C199-25VC use?

The supplier device package code is 28-SOJ.