Infineon Technologies CY7C4211V-15AXI

Overview

CY7C4211V-15AXI from Cypress Semiconductor is a 512 × 9-bit synchronous FIFO memory with 3.3 V operation, 66 MHz maximum clock frequency (15 ns cycle time), 20 mA active supply current, and programmable Almost Empty/Almost Full flags. It supports independent read/write clocks, TTL-compatible I/O, and 5 V-tolerant inputs-designed for high-speed data buffering in communications interfaces and multiprocessor systems.

For engineers reviewing the CY7C4211V-15AXI datasheet, CY7C4211V-15AXI pinout, CY7C4211V-15AXI application, or CY7C4211V-15AXI equivalent, key selection criteria include synchronous dual-clock operation, programmable flag offsets, 9-bit width expansion capability, and TQFP-32 packaging with center power/ground pins for noise reduction.

Technical Context

The CY7C4211V-15AXI implements a dual-port SRAM-based FIFO architecture with separate WCLK and RCLK domains, enabling true asynchronous read/write operation. Its status flags (EF, FF, PAE, PAF) are fully synchronous-EF and PAE updated on RCLK edges, FF and PAF on WCLK edges-with programmable offsets stored in four 8-bit registers.

Flag behavior is deterministic: PAE asserts when unread words ≤ n (default n = 7), PAF asserts when unread words ≥ (512 − m) (default m = 7). The device resets to empty state on RS assertion, with Q0–Q8 outputs driven low tRSF after RS rising edge, and supports width expansion via parallel 9-bit bus stacking.

Key Specifications

Pinout & Package

Package: 32-pin TQFP (7 mm × 7 mm), lead-free, with center V_CC and GND pins for reduced switching noise.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2113L15PF and SN74V293-15PAG, the CY7C4211V-15AXI uniquely integrates dual-mode WEN2/LD for in-field flag offset programming and center-pin power/ground layout for lower EMI-critical for noise-sensitive instrumentation and industrial control designs.

Availability

CY7C4211V-15AXI is available at Aetrix Electronics and suitable for high-speed data acquisition, multiprocessor interconnect, serial protocol translation, and industrial Ethernet buffering requiring stable component supply across long-lifecycle embedded programs.

Supply support for CY7C4211V-15AXI 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) is a fabless semiconductor company specializing in microcontrollers, connectivity solutions, and memory products for industrial, automotive, and consumer applications.

The CY7C42X1V series was designed specifically for synchronous, low-latency data buffering in mixed-clock-domain systems-emphasizing deterministic flag timing, 5 V-tolerant interfacing, and minimal board space via TQFP-32 packaging.

FAQ

What is the default Almost Empty and Almost Full offset value?

The CY7C4211V-15AXI defaults to an Almost Empty offset of 7 words and an Almost Full offset of 7 words, meaning PAE asserts when ≤7 words remain unread and PAF asserts when ≥505 words are unread (512 − 7). These values are stored in internal 8-bit registers and can be reprogrammed using the WEN2/LD and WCLK sequence described in the datasheet.

Can WCLK and RCLK operate at different frequencies?

Yes-WCLK and RCLK are fully independent free-running clocks. The device supports asynchronous operation where WCLK runs at 66 MHz while RCLK operates at 25 MHz, for example. Flag synchronization remains reliable: EF and PAE update on RCLK edges, FF and PAF on WCLK edges, eliminating metastability concerns in clock-domain crossing.

Is the CY7C4211V-15AXI pin-compatible with the CY7C4201V-15AXI?

No-while both use the same 32-pin TQFP package and share identical pinouts, the CY7C4201V-15AXI has 256 × 9 depth versus 512 × 9 for the CY7C4211V-15AXI. Functionally identical control and data signals allow drop-in replacement only if buffer depth requirements match; deeper FIFO usage requires verification of timing margins and flag behavior scaling.

How does the reset (RS) pin affect output states?

Asserting RS (HIGH) forces the FIFO into empty state: EF goes LOW, Q0–Q8 outputs drive LOW within tRSF (max 15 ns), and all internal pointers reset. Outputs remain valid and driven during reset-no bus contention occurs. After RS deassertion, the first WCLK edge with WEN1 LOW writes to address zero, ensuring deterministic initialization.