Infineon Technologies CY7C1441AV33-133AXI

Overview

CY7C1441AV33-133AXI from Cypress Semiconductor is a 36-Mbit (1M × 36) synchronous flow-through SRAM with 133-MHz bus operation, 6.5 ns clock-to-output delay, 3.3 V core supply, and dual-voltage I/O (2.5 V or 3.3 V). It supports Intel Pentium™-compatible interleaved or linear burst sequences via MODE pin selection and is used in high-speed secondary cache subsystems for microprocessor-based embedded and computing systems.

For engineers reviewing the CY7C1441AV33-133AXI datasheet, CY7C1441AV33-133AXI pinout, CY7C1441AV33-133AXI application, or CY7C1441AV33-133AXI equivalent, key selection criteria include burst sequence control (MODE), synchronous self-timed write capability, JTAG boundary scan compliance (IEEE 1149.1), and support for separate processor/controller address strobes (ADSP/ADSC).

Technical Context

The device implements a 2-bit on-chip wraparound burst counter that captures A[1:0] at ADSP/ADSC assertion and auto-increments addresses during burst cycles. All synchronous inputs - including address, data, CE1/CE2/CE3, ADSP, ADSC, ADV, BWx, BWE, and GW - are registered on the rising edge of CLK.

Asynchronous controls include OE (tri-state output enable) and ZZ (high-active sleep mode with data retention). Burst order (interleaved vs. linear) is statically selected by MODE pin voltage level and must remain static during operation; internal pull-up ensures default interleaved behavior when floating.

Key Specifications

Pinout & Package

CY7C1441AV33-133AXI is available in JEDEC-standard Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) package. Pin functions are fully synchronous except OE and ZZ, which operate asynchronously.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous burst SRAM applications.

Compared with IS61WV102436BLL-133TQLI and AS7C33128A-133BIN, CY7C1441AV33-133AXI uniquely delivers Pentium-compatible interleaved burst, dual-address-strobe architecture, JTAG testability, and active-low ZZ sleep - critical for complex, multi-agent, or safety-certifiable systems.

Availability

CY7C1441AV33-133AXI is available at Aetrix Electronics and suitable for secondary cache subsystems, real-time industrial controllers, telecom packet buffers, and avionics data acquisition modules requiring stable component supply across extended product lifecycles.

Supply support for CY7C1441AV33-133AXI 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 U.S.-based semiconductor company specializing in high-performance memory, PSoC, and programmable solutions for embedded systems.

The CY7C1441AV33 belongs to Cypress's synchronous flow-through SRAM product line, engineered specifically for low-latency, burst-mode cache and buffer applications in microprocessor-centric systems requiring deterministic timing and minimal interface logic.

FAQ

What is the function of the MODE pin, and how must it be configured?

The MODE pin selects burst address sequence: HIGH (or floating, due to internal pull-up) enables interleaved burst compatible with Intel Pentium processors; LOW (tied to GND) selects linear burst. It is a static strap pin - configuration must be fixed before operation and cannot change dynamically during bursts or reads/writes.

Does CY7C1441AV33-133AXI support true 2.5 V I/O operation while maintaining 3.3 V core functionality?

Yes - the device operates its core logic and memory array from a 3.3 V supply (VDD), while the I/O buffers (DQ/DQP, BWx, OE, etc.) are powered separately by VDDQ, which may be set to either 2.5 V or 3.3 V. This allows seamless interfacing with 2.5 V system buses without level-shifting components.

How does the ZZ (sleep) mode affect data retention and wake-up timing?

When ZZ is driven HIGH, the device enters non-time-critical sleep mode with full data retention. Wake-up occurs synchronously on the next rising CLK edge after ZZ returns LOW; no additional stabilization delay is required. Current drops to CMOS standby level (≤120 mA), preserving power without compromising data integrity.

Can ADSP and ADSC be used simultaneously, and what happens if both are asserted?

No - ADSP and ADSC are mutually exclusive. If both are asserted LOW simultaneously, the device recognizes only ADSP. ADSC is ignored when ADSP is active. This priority scheme ensures deterministic address capture in systems where both CPU and cache controller might attempt concurrent access initiation.