Infineon Technologies CY7C1440KV33-167AXC

Overview

CY7C1440KV33-167AXC from Cypress Semiconductor is a 36-Mbit pipelined synchronous SRAM with on-chip ECC, configured as 1M × 36, operating at 167 MHz with 3.3 V core and 2.5/3.3 V I/O supplies. It supports interleaved or linear burst sequences, synchronous self-timed writes, and asynchronous output enable - deployed in high-speed CPU cache subsystems requiring soft-error resilience.

For engineers reviewing the CY7C1440KV33-167AXC datasheet, CY7C1440KV33-167AXC pinout, CY7C1440KV33-167AXC application, or CY7C1440KV33-167AXC equivalent, key selection criteria include burst address control (ADSP/ADSC/ADV), byte-write granularity (BWA–BWD + BWE), clock-to-output timing (3.4 ns), and JTAG-compliant boundary scan for system-level testability.

Technical Context

This SRAM implements a dual-strobe synchronous interface with registered address/data/control inputs sampled on CLK's rising edge, and pipelined output registers delivering data with deterministic 3.4 ns tCO. The two-bit internal burst counter enables wraparound addressing for both interleaved and linear sequences, selected via MODE pin.

It integrates ECC encoding/decoding logic to detect and correct single-bit errors per 36-bit word, reducing soft error rate without external logic. Sleep mode (ZZ) provides low-power retention with data integrity preserved, while IEEE 1149.1 JTAG supports boundary-scan testing in dense PCB layouts.

Key Specifications

Pinout & Package

Packaged in Pb-free 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) with thermal pad; pinout validated per Cypress Document 001-66676 Rev. *G, Figure 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-167TQLI, CY7C1440KV33-167AXC adds hardware SEC-DED ECC and dual-strobe burst control - critical for safety-certifiable systems. Versus MT28EW128ABA1HPC-0SIT, it delivers 2.1× lower access latency and deterministic burst timing, making it irreplaceable in real-time cache roles.

Availability

CY7C1440KV33-167AXC is available at Aetrix Electronics and suitable for high-reliability CPU cache subsystems, network packet buffering, industrial PLC memory expansion, and avionics data recorders requiring stable component supply across extended product lifecycles.

Supply support for CY7C1440KV33-167AXC 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 markets.

CY7C1440KV33 belongs to Cypress's high-speed synchronous SRAM product line, engineered specifically for low-latency, ECC-protected cache and buffer applications in mission-critical embedded systems.

FAQ

What is the function of the MODE pin on CY7C1440KV33-167AXC?

The MODE pin selects burst address sequence: logic HIGH configures interleaved burst order (compatible with Intel Pentium processors), while logic LOW selects linear burst order. It is sampled asynchronously at power-up or reset and latched internally - no clock required for mode selection. This enables hardware-configurable compatibility across different CPU architectures without firmware modification.

Does CY7C1440KV33-167AXC support 2.5 V-only operation?

Yes - the device supports 2.5 V I/O supply (VDDQ) while maintaining 3.3 V core (VDD). All I/O pins are JEDEC JESD8-5 compliant at 2.5 V, and AC timing parameters (e.g., tCO = 3.4 ns) are guaranteed under 2.5 V VDDQ conditions. Core voltage must remain at 3.3 V ± 0.3 V; mixing 2.5 V core is not supported.

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

In ZZ mode (pin driven HIGH), the device enters a non-time-critical retention state: core and I/O power drop to ≤5 mA typical, clock may be stopped, and all inputs except ZZ are ignored. Data is retained indefinitely as long as VDD and VDDQ remain within specification. Exit time from ZZ is 20 ns max after ZZ returns LOW - no resynchronization or initialization is needed.

Can CE2 be used independently of CE1 and CE3 for chip select?

No - CE2 is active HIGH and functions only in conjunction with CE1 (active LOW) and CE3 (active LOW) as a three-input decode. The device enables only when CE1 = LOW, CE2 = HIGH, and CE3 = LOW. CE2 alone has no standalone chip-select function; its state is sampled synchronously with CLK and ignored if CE1 is deasserted.