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Infineon Technologies CY7C4231-15AXC — Memory (DRAM / SRAM / Flash / EEPROM)

Cypress CY7C4231-15AXC 18K Sync FIFO, 66.7MHz

MPNCY7C4231-15AXC
Obsolete

Cypress CY7C4231-15AXC, Series CY7C, synchronous FIFO, 18K (2K x 9), 66.7 MHz data rate, 10 ns access time, 4.5 V to 5.5 V supply, 32-TQFP (7x7), 0°C to 70°C.

$12.8500Ref. price · indicative, final on quote
Infineon Technologies CY7C4231-15AXC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C4231-15AXC specifications
ParameterValue
SeriesCY7C
MountingSurface Mount
Expansion typeDepth, Width
Supply voltage4.5 V ~ 5.5 V
Current - supply35mA
Operating temperature0°C ~ 70°C
PackageTray
FunctionSynchronous
Data rate66.7MHz
Access time10ns
Memory size18K (2K x 9)
FWFT supportNo
Case32-TQFP
Bus directionalUni-Directional
Retransmit capabilityNo
Programmable flags supportYes

Product details

Sync FIFO for 5 V datapath buffering

The Cypress CY7C4231-15AXC is a synchronous FIFO with a 2K x 9 memory array, clocked at 66.7 MHz and delivering a 10 ns access time. It operates from a 4.5 V to 5.5 V supply on a 32-TQFP (7x7) surface-mount package, rated for 0°C to 70°C commercial temperature range. Depth and width expansion are supported; programmable flags and a uni-directional bus round out the control interface.

66.7 MHz synchronous clock — timing margin for the datapath

The 66.7 MHz data rate and 10 ns access time define the throughput and read latency. The 2K x 9 depth (18 Kbits) suits moderate packet buffering.

Obsolete — sourcing and replacement planning

Frequently asked questions

What is the closest pin-compatible alternative to CY7C4231-15AXC?

No official pin-compatible successor is documented for the CY7C4231-15AXC. Designers should evaluate the active Cypress CY7C42xxx synchronous FIFO family, verifying package, supply voltage, and timing compatibility.

What is CY7C4231-15AXC used for?

The CY7C4231-15AXC is a synchronous FIFO buffer used for temporary data storage and rate-matching in digital systems, typically in telecom, datacom, or DSP datapaths operating at 5 V logic levels.

What compliance documentation is available for CY7C4231-15AXC?

The part is listed as RoHS-compliant per the Cypress product line. Specific REACH, UL, or IEC declarations should be requested at quote time from the supplier.