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Infineon Technologies CY7C4211-15AXC — Memory (DRAM / SRAM / Flash / EEPROM)

Cypress CY7C4211-15AXC Synchronous FIFO, 66.7 MHz, 512 x 9

MPNCY7C4211-15AXC
Obsolete

Cypress CY7C4211-15AXC synchronous FIFO, 66.7 MHz data rate, 10 ns access time, 4.5 Kbit (512 x 9) memory, 4.5 V–5.5 V supply, 0°C–70°C, 32-TQFP (7x7 mm), Tube.

Infineon Technologies CY7C4211-15AXC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

CY7C4211-15AXC specifications
ParameterValue
SeriesCY7C
MountingSurface Mount
Expansion typeDepth, Width
Voltage4.5 V ~ 5.5 V
Current - supply35mA
Operating temperature0°C ~ 70°C
PackageTube
FunctionSynchronous
Data rate66.7MHz
Access time10ns
Memory size4.5K (512 x 9)
FWFT supportNo
Case32-TQFP
Bus directionalUni-Directional
Retransmit capabilityNo
Programmable flags supportYes

Product details

Obsolete — no direct replacement on record

The Cypress CY7C4211-15AXC is listed as obsolete (product status: Obsolete).

What this synchronous FIFO does — and where it was used

The CY7C4211-15AXC is a synchronous FIFO (First-In, First-Out) memory from Cypress's CY7C series. The 9-bit width accommodates an eighth data bit plus a parity/control bit, common in telecom or datacom packet buffers. It supports depth and width expansion (cascade for deeper or wider queues) and has programmable flag outputs for almost-full/almost-empty thresholds — useful for rate-matching between a fast source and a slower sink, or for assembling data packets before a burst transfer.

Package and footprint — 32-TQFP (7x7 mm)

Surface-mount only. No official pin-compatible second source or replacement is documented, so the PCB footprint is tied to this specific Cypress device. If you are retrofitting an existing board that uses this part, verify the flag and control pin assignments against your schematic — there is no guaranteed cross.

Frequently asked questions

Is CY7C4211-15AXC obsolete?

Yes, the CY7C4211-15AXC is officially listed as obsolete. Cypress has not published a direct successor order code. Availability is limited to surplus and broker-channel inventory.

What is the replacement for CY7C4211-15AXC?

The part is obsolete with no designated successor. For a BOM line that must be filled, the only path is sourcing verified surplus stock through independent distribution.

What does 512 x 9 FIFO mean?

It means the FIFO can store 512 words, each 9 bits wide. The 9th bit is often used for parity or a control flag alongside the 8 data bits. This width is typical in telecom or datacom applications where an extra bit is needed for out-of-band signalling.