Infineon Technologies CY7C1440AV33-250AXI

Overview

CY7C1440AV33-250AXI from Cypress Semiconductor is a 36-Mbit (1M × 36) pipelined synchronous SRAM with registered I/O, 250 MHz clock support, 2.6 ns clock-to-output delay, 3.3 V core supply, and 2.5/3.3 V I/O compatibility-designed for high-bandwidth secondary cache in Pentium-class processor systems.

For engineers reviewing the CY7C1440AV33-250AXI datasheet, CY7C1440AV33-250AXI pinout, CY7C1440AV33-250AXI application, or CY7C1440AV33-250AXI equivalent, key selection criteria include burst mode flexibility (Intel Pentium interleaved vs. linear), synchronous self-timed write architecture, JTAG boundary scan compliance, and dual-voltage I/O operation under JEDEC JESD8-5.

Technical Context

The device implements a two-bit synchronous wraparound burst counter, with address strobes ADSP (processor) and ADSC (controller) enabling independent address capture on rising CLK edges. All synchronous inputs-including A[1:0], CE1–CE3, BWA–BWD, GW, BWE, ADV, ADSP, ADSC-are registered at CLK rise, while OE and ZZ remain asynchronous.

It supports byte-selectable writes via BWE + BWX (BWA–BWD), global writes via active-low GW, and programmable burst sequencing via MODE pin sampling. Output registers deliver data within 2.6 ns after CLK rise (250 MHz grade), with tri-state control governed by asynchronous OE and chip-deselect timing optimized for single-cycle deselect.

Key Specifications

Pinout & Package

CY7C1440AV33-250AXI is packaged in a Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) with exposed thermal pad. 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 SRAM applications.

Compared with IS61WV102436BLL-250BLI and MC10E143FNG, CY7C1440AV33-250AXI uniquely integrates burst-address generation, dual-voltage I/O, and JTAG testability in a single monolithic SRAM-making it irreplaceable for validated x86-compatible cache designs requiring production test coverage.

Availability

CY7C1440AV33-250AXI is available at Aetrix Electronics and suitable for secondary cache subsystems, network packet buffering, real-time DSP data storage, and ATE pattern memory applications requiring stable component supply and long-lifecycle support.

Supply support for CY7C1440AV33-250AXI 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 high-performance memory, microcontrollers, and programmable analog/digital ICs for industrial, automotive, and communications markets.

CY7C1440AV33 belongs to Cypress's legacy synchronous SRAM product line, engineered specifically for high-speed, low-latency cache and buffer applications in CPU-adjacent subsystems where deterministic timing and burst efficiency are critical.

FAQ

Is CY7C1440AV33-250AXI still in production?

No-this part is marked obsolete per Cypress document 38-05383 Rev. *N (November 2016), with no designated replacement. Aetrix Electronics maintains legacy inventory and offers extended lifecycle support including obsolescence forecasting, cross-reference engineering, and last-time-buy coordination for active production programs.

What is the function of the MODE pin?

The MODE pin selects burst address sequence at power-up or reset: logic LOW configures Intel Pentium interleaved burst (0,2,4,6), while HIGH selects linear burst (0,1,2,3). It is sampled once during initialization and remains latched until next reset or power cycle.

Can CY7C1440AV33-250AXI operate with only 2.5 V supplies?

No-the core logic requires 3.3 V on VDD; only VDDQ (I/O supply) supports 2.5 V operation. Using 2.5 V on VDD violates absolute maximum ratings and will cause functional failure. VDD must be 3.3 V ±0.3 V at all times.

How does ZZ sleep mode affect timing parameters?

In ZZ mode (HIGH), core clocks halt, current drops to standby level (120 mA max), and outputs enter high-impedance state-but data retention is guaranteed. Exit latency is one CLK cycle; no reinitialization or refresh is required upon wake-up.