Infineon Technologies CY7C1441AV33-133BZI

Overview

CY7C1441AV33-133BZI from Cypress Semiconductor is a 36-Mbit (1M × 36) synchronous flow-through SRAM designed for high-speed secondary cache interfacing in Pentium-class microprocessor systems. It supports 133-MHz bus operations with 6.5 ns clock-to-output delay, 3.3 V core supply, dual-voltage I/O (2.5 V or 3.3 V), and user-selectable interleaved/linear burst sequences via the MODE pin.

For engineers reviewing the CY7C1441AV33-133BZI datasheet, CY7C1441AV33-133BZI pinout, CY7C1441AV33-133BZI application, or CY7C1441AV33-133BZI equivalent, key selection criteria include burst timing control (ADSP/ADSC/ADV), byte-write granularity (BWA–BWD + BWE), synchronous self-timed write, ZZ sleep mode, and JTAG boundary-scan compliance for system-level testability.

Technical Context

The device implements a 2-bit on-chip wraparound burst counter that captures A[1:0] at ADSP/ADSC assertion and auto-increments addresses during burst reads/writes. All synchronous inputs-including address, CE1/CE2/CE3, ADSP/ADSC/ADV, BWx, BWE, GW, and CLK-are registered on the rising edge of CLK, enabling precise timing control in pipelined cache architectures.

Asynchronous controls-OE and ZZ-operate independently of CLK: OE enables tri-state output control during read cycles, while ZZ places the device in low-power sleep with data retention. The MODE pin statically selects interleaved (Pentium-compatible) or linear burst order, and DQPx parity I/O lines mirror DQx functionality with byte-aligned parity support.

Key Specifications

Pinout & Package

CY7C1441AV33-133BZI is available in JEDEC-standard Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) and 165-ball FBGA (15 × 17 × 1.4 mm) packages. The "BZI" suffix denotes the industrial-grade TQFP variant with extended temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-133TQLI and MT55LCS036S133A1, CY7C1441AV33-133BZI uniquely combines dual-voltage I/O, JTAG testability, ZZ sleep, and selectable burst modes - making it the only option for Pentium-class cache with production test coverage and power-aware operation.

Availability

CY7C1441AV33-133BZI is available at Aetrix Electronics and suitable for Intel Pentium cache subsystems, high-performance embedded controller caches, multi-processor shared memory buffers, and ATE pattern memory applications requiring stable component supply across extended industrial temperature ranges.

Supply support for CY7C1441AV33-133BZI 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 memory, microcontrollers, and programmable system-on-chip solutions for industrial, automotive, and communications markets.

CY7C1441AV33 belongs to Cypress's high-speed synchronous SRAM product line, engineered specifically for low-latency, burst-mode cache interfacing in x86 and embedded processor platforms requiring deterministic timing and robust testability.

FAQ

What is the function of the MODE pin, and how must it be configured?

The MODE pin selects burst sequence order: HIGH (or floating) enables Intel Pentium-compatible interleaved addressing, while LOW (tied to GND) selects linear burst. It is a static strap pin - configuration must be fixed before device operation and cannot be changed dynamically. Internal pull-up ensures default interleaved mode if left unconnected.

Does CY7C1441AV33-133BZI support true 2.5 V I/O operation, and what are the voltage tolerance limits?

Yes - the device supports true 2.5 V I/O operation with VDDQ = 2.5 V ± 0.2 V, while maintaining full 3.3 V core (VDD = 3.3 V ± 0.3 V). Input thresholds are JESD8-5-compliant, allowing reliable interfacing with 2.5 V logic families without level shifters or external biasing networks.

How does the ZZ sleep mode interact with ongoing burst operations or write cycles?

ZZ is asynchronous and active-HIGH: asserting ZZ immediately halts all internal operations, places outputs in high-impedance state, and reduces current to 120 mA standby. It preserves data integrity but terminates any in-progress burst or write - no handshake or completion wait is required before entry.

Can ADSP and ADSC be used simultaneously, and what happens if both are asserted?

No - ADSP and ADSC are mutually exclusive. When both are asserted LOW, the device recognizes only ADSP and ignores ADSC. This priority hierarchy ensures deterministic burst initiation in systems where processor and controller strobes may overlap, preventing ambiguous address capture.