Infineon Technologies CY7C1440AV33-167AXCT

Overview

CY7C1440AV33-167AXCT from Cypress Semiconductor is a 36-Mbit (1M × 36) pipelined synchronous SRAM with registered inputs/outputs, 3.3 V core supply, 2.5 V/3.3 V I/O support, and 167 MHz operation enabling 3-1-1-1 burst access in high-speed cache subsystems for Pentium-class processors.

For engineers reviewing the CY7C1440AV33-167AXCT datasheet, CY7C1440AV33-167AXCT pinout, CY7C1440AV33-167AXCT application, or CY7C1440AV33-167AXCT equivalent, key selection criteria include synchronous burst timing, byte-selectable write control, JTAG boundary scan compliance, and dual-voltage I/O flexibility for legacy-to-modern interface bridging.

Technical Context

The device implements a two-bit synchronous wraparound burst counter controlled by ADV, ADSP, and ADSC to generate internal addresses for interleaved or linear burst sequences-selected via the MODE pin. All synchronous inputs (address, CE, BWE, GW, ADV, ADSP/ADSC) are registered on the rising edge of CLK.

It supports self-timed synchronous writes with byte-level granularity (BWA–BWD + BWE) or global write (GW), asynchronous OE for output tri-state control, and ZZ sleep mode with data retention. I/O pins operate at either 2.5 V or 3.3 V while core logic runs at 3.3 V, meeting JEDEC JESD8-5 voltage compatibility.

Key Specifications

Pinout & Package

Available in Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) and 165-ball FBGA (15 × 17 × 1.4 mm) packages. Pin functions validated per Cypress Document No. 38-05383 Rev. *N.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-167TQLI and AS7C331025A-167BIN, the CY7C1440AV33-167AXCT uniquely combines JTAG testability, dual-voltage I/O, programmable burst sequencing, and ZZ sleep-making it the sole option for legacy-compatible, test-ready, and power-aware synchronous cache implementations.

Availability

CY7C1440AV33-167AXCT is available at Aetrix Electronics and suitable for processor cache interfaces, network packet buffers, industrial motion controllers, and ATE pattern memory requiring stable component supply and long-term obsolescence mitigation.

Supply support for CY7C1440AV33-167AXCT 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 memory and programmable solutions for embedded systems, automotive, and industrial applications.

The CY7C1440AV33 belongs to Cypress's pipelined synchronous SRAM product line, engineered specifically for low-latency, burst-capable cache and buffer applications in x86-compatible and real-time control systems.

FAQ

What is the function of the MODE pin on CY7C1440AV33-167AXCT?

The MODE pin selects between Intel Pentium-style interleaved burst addressing and linear burst addressing. It is sampled at power-up or reset to configure the internal two-bit burst counter's increment behavior-determining whether successive burst addresses follow 0,2,4,6 or 0,1,2,3 patterns. This setting remains static until next reset.

Can CY7C1440AV33-167AXCT operate with 2.5 V I/O while the core runs at 3.3 V?

Yes. The device uses separate VDDQ (I/O supply) and VDD (core supply) rails. VDDQ may be set to either 2.5 V or 3.3 V independently, allowing direct connection to 2.5 V ASICs or FPGAs while maintaining 3.3 V core performance. VDDQ must be stable before VDD during power-up per datasheet sequencing requirements.

How does the ZZ pin affect power consumption and data retention?

When ZZ is driven HIGH, the device enters non-time-critical sleep mode with typical standby current reduced to ≤120 mA and full data retention guaranteed. Core clocks and I/O drivers are gated, but SRAM cell bias remains active. Data remains valid for ≥24 hours after ZZ assertion, and recovery to full operation requires only one CLK cycle after ZZ returns LOW.

Is the CY7C1440AV33-167AXCT pin-compatible with the 250 MHz speed grade?

Yes. The -167AXCT and -250AXCT share identical pinouts, package dimensions, and electrical interface definitions-including identical VDD/VDDQ, CLK, ADSP/ADSC, ADV, OE, and DQ pin assignments. Only AC timing parameters (tCO, tAA, etc.) differ; no layout change is needed when upgrading speed grade within the same package variant.