Infineon Technologies CY7C4275V-10ASC

Overview

CY7C4275V-10ASC from Cypress Semiconductor is a 32K × 18-bit, 3.3V asynchronous dual-clock FIFO memory with independent read/write interfaces, 100 MHz operation (10 ns cycle time), programmable Almost Empty/Almost Full flags, and 64-pin STQFP package. It serves as a high-speed data buffer in multiprocessor interconnects, communications gateways, and real-time acquisition systems where clock domain bridging and deterministic latency are required.

For engineers reviewing the CY7C4275V-10ASC datasheet, CY7C4275V-10ASC pinout, CY7C4275V-10ASC application, or CY7C4275V-10ASC equivalent, key selection criteria include synchronous/asynchronous flag timing control via VCC/SMODE, retransmit capability for packet recovery, depth/width expansion support, and 30 mA active current at 100 MHz operation.

Technical Context

This FIFO implements a dual-port SRAM array (32K × 18 bits) with physically separate read and write pointer logic, enabling true simultaneous read/write operations without arbitration. Its status flags-EF, FF, PAE, PAF, and WXO/HF-are generated from pointer comparisons and synchronized to RCLK or WCLK depending on VCC/SMODE configuration.

The device supports three operational modes: standalone (with retransmit via FL/RT), width expansion (18-bit increments using shared control lines), and depth expansion (via WXI/WXO/RXI/RXO cascading with FL pin hierarchy). Programming of flag offsets occurs through LD-controlled register writes using D0–D15 during dedicated WCLK/RCLK transitions.

Key Specifications

Pinout & Package

64-pin 10×10 mm STQFP (Thin Quad Flat Package) with exposed thermal pad; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FIFO memory applications.

Compared with IDT72V2115L10PF and NB3N502MNG, the CY7C4275V-10ASC uniquely combines 32K depth, hardware retransmit, and full expansion capability in a single 64-pin STQFP package-enabling scalable, low-latency buffering without FPGA or CPLD assistance.

Availability

CY7C4275V-10ASC is available at Aetrix Electronics and suitable for high-speed data acquisition, multiprocessor interconnect, and industrial communications requiring stable component supply across long-lifecycle embedded programs.

Supply support for CY7C4275V-10ASC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance mixed-signal ICs for embedded control, connectivity, and memory applications, with emphasis on reliability and automotive-grade qualification.

The CY7C42X5V family targets high-speed buffering in heterogeneous clock domain systems, delivering deterministic latency, expandability, and low-power operation for industrial, test equipment, and communications infrastructure.

FAQ

What is the function of the VCC/SMODE pin on CY7C4275V-10ASC?

The VCC/SMODE pin configures the synchronization behavior of the PAE and PAF flags. When tied to VCC, these flags operate asynchronously; when tied to VSS, PAE is synchronized to RCLK and PAF to WCLK. This selection directly affects timing predictability in systems requiring flag-driven interrupt generation or flow control.

How does the retransmit feature work without external logic?

A HIGH pulse on the FL/RT pin resets the internal read pointer to the first physical FIFO location. During retransmit, previously written data is read out sequentially on subsequent RCLK edges while the write pointer remains unchanged. No external controller sequencing is needed-only proper tRTR timing compliance before and after the pulse.

Can CY7C4275V-10ASC be used in depth-expanded configurations with different density variants?

No. Depth expansion requires identical density devices (e.g., CY7C4275V only) to ensure consistent pointer arithmetic and flag generation across the chain. Mixing CY7C4275V with CY7C4285V or CY7C4265V violates the FL pin hierarchy and causes undefined flag behavior and pointer misalignment.

What is the minimum setup/hold time requirement for WEN relative to WCLK?

WEN must be stable for ≥3.5 ns before the rising edge of WCLK (tENS) and held for ≥0 ns after (tENH), per the -10 speed grade specification. Violating this window risks metastability in the write enable path and may cause intermittent data loss or spurious writes.