Infineon Technologies CY7C1440KVE33-167AXC

Overview

CY7C1440KVE33-167AXC from Cypress Semiconductor is a 36-Mbit pipelined synchronous SRAM with on-chip ECC, configured as 1M × 36, operating at 167 MHz with 3.4 ns clock-to-output delay, 3.3 V core supply, and 2.5/3.3 V I/O support-used in high-speed secondary cache for Pentium-class processors and network packet buffering systems.

For engineers reviewing the CY7C1440KVE33-167AXC datasheet, CY7C1440KVE33-167AXC pinout, CY7C1440KVE33-167AXC application, or CY7C1440KVE33-167AXC equivalent, key selection criteria include burst mode configuration (interleaved/linear), byte-write granularity (1–4 bytes), ZZ sleep mode behavior, and JTAG boundary-scan compliance for system-level testability.

Technical Context

This SRAM implements a two-bit synchronous burst counter that auto-increments addresses on ADV assertion, supporting both interleaved (Pentium-compatible) and linear burst sequences selected via the MODE pin. All address, data, and control inputs are registered on the rising edge of CLK, enabling deterministic pipelined timing.

It integrates dedicated byte-write logic (BWA–BWD + BWE) and global write (GW) to enable selective or full-word writes within a single clock cycle. On-chip ECC encoder/decoder corrects single-bit errors and detects double-bit errors, reducing soft error rate without external logic.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (Pb-free), 165-ball FBGA (Pb-free and non-Pb-free options). Pinout validated per Cypress Document 001-66676 Rev. *G, Figures 1 and 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-167BLI, CY7C1440KVE33-167AXC delivers built-in ECC and dual-voltage I/O at modest cost premium; versus MT28EW128Fxx-167WLC, it provides true synchronous pipelined SRAM behavior essential for real-time buffering-not a drop-in replacement.

Availability

CY7C1440KVE33-167AXC is available at Aetrix Electronics and suitable for network packet buffering, processor secondary cache, telecom baseband processing, and avionics data acquisition requiring stable component supply across extended product lifecycles.

Supply support for CY7C1440KVE33-167AXC 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 industrial, automotive, and communications systems.

CY7C1440KVE33 belongs to Cypress's high-speed synchronous SRAM product line, engineered specifically for low-latency, ECC-protected cache and buffering in mission-critical embedded computing platforms.

FAQ

What is the function of the MODE pin on CY7C1440KVE33-167AXC?

The MODE pin selects burst address sequencing: logic LOW configures interleaved burst order (compatible with Intel Pentium processors), while logic HIGH selects linear burst order. It is sampled synchronously on the rising edge of CLK during the first cycle of a burst access and remains latched for the duration of that burst.

Can CY7C1440KVE33-167AXC operate with only a 2.5 V I/O supply?

Yes-the device supports 2.5 V I/O operation while maintaining 3.3 V core voltage. All I/O pins (DQ, DQP, control inputs) are JEDEC JESD8-5 compliant at 2.5 V, enabling direct interfacing with 2.5 V logic families without level shifters, provided VDDQ = 2.5 V and VDD = 3.3 V are independently regulated.

How does the ZZ sleep mode affect timing and power consumption?

In ZZ mode (pin driven HIGH), the device enters a low-power state with I/Os and internal clocks gated, but memory contents retained. Typical standby current drops to <50 µA. Exit time from ZZ is asynchronous and requires one CLK cycle plus tZZH (min 10 ns) before valid outputs resume-no reset or initialization sequence is needed.

Is JTAG boundary scan enabled by default on CY7C1440KVE33-167AXC?

Yes-JTAG (IEEE 1149.1) is factory-enabled and cannot be disabled. The TAP controller responds to standard instructions (SAMPLE/PRELOAD, EXTEST, IDCODE) using TCK, TMS, TDI, and TDO pins. No external configuration is required to activate boundary-scan functionality for PCB test.