Infineon Technologies CY7C1440AV25-250BZXI

Overview

CY7C1440AV25-250BZXI from Cypress Semiconductor is a 36-Mbit pipelined synchronous SRAM organized as 1 M × 36, operating at 250 MHz with 2.5 V core/I/O supply, 2.6 ns clock-to-output delay, and IEEE 1149.1 JTAG boundary scan-designed for high-bandwidth secondary cache in Pentium-class processor systems.

For engineers reviewing the CY7C1440AV25-250BZXI datasheet, CY7C1440AV25-250BZXI pinout, CY7C1440AV25-250BZXI application, or CY7C1440AV25-250BZXI equivalent, key selection criteria include burst mode flexibility (Intel Pentium interleaved/linear), synchronous self-timed write control, byte-selectable or global write capability, and 165-ball FBGA package compatibility with JEDEC JESD8-5 I/O standards.

Technical Context

This SRAM implements a two-bit synchronous wraparound burst counter, registered address/data paths, and dual address strobe logic (ADSP/ADSC) to support processor- and controller-initiated accesses. All synchronous inputs-including CE1/CE2/CE3, BWA–BWD, GW, and ADV-are edge-triggered on CLK's rising edge.

It delivers a 3-1-1-1 access rate with pipelined enable registers, output registers, and sense amplifiers. The ZZ pin provides asynchronous sleep mode with data retention, while OE enables tri-state control independent of clock timing.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm, RoHS-compliant (Pb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-250BLI and MT55LSD256H36BG-250:G, the CY7C1440AV25-250BZXI uniquely combines 165-ball FBGA footprint, integrated JTAG, and native 2.5 V I/O - making it the sole option for space-constrained, test-ready Pentium-compatible cache designs without voltage translation.

Availability

CY7C1440AV25-250BZXI is available at Aetrix Electronics and suitable for secondary cache subsystems, high-speed video buffering, network packet buffering, and ATE pattern memory applications requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1440AV25-250BZXI 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, PSoC programmable systems-on-chip, and USB/USB-C solutions.

The CY7C1440AV25 belongs to Cypress's high-speed synchronous SRAM product line, engineered specifically for low-latency, burst-mode cache and buffer applications in x86-compatible and industrial real-time systems.

FAQ

What is the function of the MODE pin on CY7C1440AV25-250BZXI?

The MODE pin selects the burst address sequence: logic HIGH configures Intel Pentium interleaved addressing (e.g., 0, 2, 4, 6, 1, 3, 5, 7), while logic LOW enables linear addressing (0, 1, 2, 3, 4, 5, 6, 7). It is sampled synchronously on the rising edge of CLK during the first cycle of a burst operation and remains latched for the duration of that burst.

Can CY7C1440AV25-250BZXI operate with mixed voltage supplies (e.g., 2.5 V core and 3.3 V I/O)?

No. The device requires strictly 2.5 V for both VDD (core) and VDDQ (I/O). Applying 3.3 V to VDDQ exceeds the absolute maximum rating of 2.7 V and risks permanent damage to output drivers and input protection circuitry. VDDQ must be regulated to 2.5 V ± 5% per datasheet specifications.

How does the ZZ (sleep) mode affect timing parameters during wake-up?

When ZZ transitions from HIGH to LOW, the device exits sleep mode asynchronously, but valid operation resumes only after t_ZZ = 10 ns (min) and t_EL = 3 ns (min) - the latter being the minimum time from ZZ deassertion to next valid CLK edge. No reinitialization or reset sequence is required; all internal state, including burst counter and registers, is preserved.

Is the CY7C1440AV25-250BZXI pin-compatible with CY7C1446AV25?

No. Although both share functional similarity, CY7C1440AV25 uses a 165-ball FBGA (1 M × 36), while CY7C1446AV25 uses a 209-ball FBGA (512 K × 72) with different ball pitch, layout, and signal assignment - including additional DQ/DQP lines and distinct BWx pin count. PCB redesign is mandatory for substitution.