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Infineon Technologies CY7C4225-15AC — Memory (DRAM / SRAM / Flash / EEPROM)

Cypress CY7C4225-15AC Synchronous FIFO, 66.7 MHz, 10 ns Access

MPNCY7C4225-15AC
Obsolete

Cypress CY7C series synchronous FIFO, CY7C4225-15AC, 18K (1K x 18), 66.7 MHz data rate, 10 ns access time, 4.5 V–5.5 V supply, 64-LQFP, 0°C–70°C.

$7.4300Ref. price · indicative, final on quote
Infineon Technologies CY7C4225-15AC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C4225-15AC specifications
ParameterValue
SeriesCY7C
MountingSurface Mount
Expansion typeDepth, Width
Supply voltage4.5 V ~ 5.5 V
Current - supply45mA
Operating temperature0°C~70°C
PackageTray
FunctionSynchronous
Data rate66.7MHz
Access time10ns
Memory size18K (1K x 18)
FWFT supportNo
Case64-LQFP
Bus directionalUni-Directional
Retransmit capabilityYes
Programmable flags supportYes

Product details

Synchronous FIFO for 5 V data-path buffering

The CY7C4225-15AC: Synchronous FIFO organized 1K x 18 bits, clocked at 66.7 MHz with 10 ns access time. Operates from 4.5 V to 5.5 V supply, rated 0°C to 70°C.

Where it fits — applications and environments

This FIFO sits between a data source (ADC, DSP, or parallel bus) and a processing element that cannot tolerate back-pressure. Typical use cases include rate-matching between asynchronous clock domains, temporary storage in data acquisition front-ends, and elastic buffering in telecom line cards. The 64-LQFP package is surface-mount, so rework requires hot-air or reflow; no socket option for prototyping.

Frequently asked questions

What is the replacement for CY7C4225-15AC?

No direct replacement is listed. The CY7C4225-50AC is a functional sibling with the same 64-LQFP footprint and 1K x 18 organization but a different speed grade — verify timing compatibility before substituting.

What is the access time of CY7C4225-15AC?

The access time is 10 ns, measured from the read clock edge to valid data out.

Is CY7C4225-15AC compatible with 3.3V?

No. The supply range is 4.5 V to 5.5 V — this is a 5 V-only part. 3.3 V operation is not supported.

Is CY7C4225-15AC equivalent to CY7C4225-50AC?

They share the same 64-LQFP package and 1K x 18 memory organization, but the -15AC has a 10 ns access time while the -50AC is slower. Footprint-compatible but not function-equivalent unless the system timing budget can absorb the slower access.