Skip to main content
Log in
Infineon Technologies CY7C4205-15AXC — Memory (DRAM / SRAM / Flash / EEPROM)

CY7C4205-15AXC Cypress FIFO, 66.7MHz, 10ns, 4.5K, 64-LQFP

MPNCY7C4205-15AXC
Obsolete

Cypress CY7C4205-15AXC, Series CY7C, Synchronous FIFO, 66.7 MHz Data Rate, 10 ns Access Time, 4.5 K (256 x 18) Memory, 4.5 V ~ 5.5 V Supply, 64-LQFP, 0°C~70°C.

Infineon Technologies CY7C4205-15AXC datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C4205-15AXC 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 size4.5K (256 x 18)
FWFT supportNo
Case64-LQFP
Bus directionalUni-Directional
Retransmit capabilityYes
Programmable flags supportYes

Product details

Synchronous FIFO for 5 V bus buffering

The CY7C4205-15AXC: Organized as 256 words by 18 bits, 4.5 K total storage. Clocks at 66.7 MHz, 10 ns access time.

Obsolete — last-time-buy or surplus channel

Retransmit and programmable flags

This FIFO supports retransmit capability, which lets the read pointer reset to the last programmed mark without flushing the entire buffer — useful for protocol retry sequences. Programmable flags (almost-full, almost-empty) give the system early warning before the FIFO overflows or underflows, reducing the need for polling. Expansion type is depth and width, so multiple CY7C4205s can be cascaded for deeper or wider buffers without external logic.

Housed in a 64-LQFP (14x14 mm body). Surface mount.

Frequently asked questions

What is the replacement for CY7C4205-15AXC?

No official replacement part number is listed in the available records. For a new design, evaluate current-generation synchronous FIFOs from Cypress (Infineon) or a pin-compatible alternative in the CY7C series, verifying footprint and timing.

Is CY7C4205-15AXC compatible with 5V systems?

Yes, the supply range is 4.5 V to 5.5 V, so it works directly in 5 V logic systems without level translation.

What is the access time of CY7C4205-15AXC?

The access time is 10 ns, which at a 66.7 MHz clock rate provides a 5 ns timing margin for the receiving logic.