Infineon Technologies CY7C1441AV33-133BZXI

Overview

CY7C1441AV33-133BZXI from Cypress Semiconductor is a 36-Mbit (1M × 36) synchronous flow-through SRAM with 133-MHz bus operation, 6.5 ns clock-to-output delay, 3.3 V core supply, and dual-voltage I/O support (2.5 V or 3.3 V). It implements a 2-bit on-chip burst counter, supports Intel Pentium™-compatible interleaved or linear burst sequences via MODE pin selection, and is used in high-speed secondary cache subsystems for microprocessor-based embedded and computing systems.

For engineers reviewing the CY7C1441AV33-133BZXI datasheet, CY7C1441AV33-133BZXI pinout, CY7C1441AV33-133BZXI application, or CY7C1441AV33-133BZXI equivalent, key selection criteria include synchronous burst timing compliance, JEDEC-standard TQFP/FBGA package compatibility, ZZ sleep mode behavior, JTAG boundary-scan support, and byte-write versus global-write control logic.

Technical Context

The device operates synchronously with all address, data, and control inputs registered on the rising edge of CLK, while OE and ZZ remain asynchronous. Its flow-through architecture eliminates pipeline latency between consecutive burst reads, enabling 2-1-1-1 access rates - two-cycle initial access followed by single-cycle subsequent accesses.

Burst addressing is managed by a 2-bit wraparound counter initialized from A[1:0], advanced by ADV, and selected between interleaved (MODE = HIGH) or linear (MODE = LOW) sequences. Write operations are self-timed and support both byte-level (via BWA–BWD + BWE) and global (via GW) write modes, with CE1/CE2/CE3 enabling depth-expansion and bank selection.

Key Specifications

Pinout & Package

CY7C1441AV33-133BZXI is packaged in a JEDEC-standard Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) with exposed thermal pad. Pin functions are fully defined per Cypress Document No. 38-05357 Rev. *N.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102436BLL-133TQLI and MT48LC32M36A2-133:G, CY7C1441AV33-133BZXI uniquely combines deterministic flow-through timing, hardware-configurable burst order, JTAG testability, and asynchronous sleep - making it irreplaceable in certified, low-jitter, or legacy x86-compatible cache designs.

Availability

CY7C1441AV33-133BZXI is available at Aetrix Electronics and suitable for secondary cache subsystems, high-speed packet buffering, industrial motion control, and avionics data acquisition requiring stable component supply and long-term obsolescence management.

Supply support for CY7C1441AV33-133BZXI 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 solutions for embedded systems.

CY7C1441AV33 belongs to Cypress's high-speed synchronous SRAM product line, designed specifically for low-latency, burst-oriented cache and buffer applications in x86-compatible and real-time deterministic systems.

FAQ

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

The MODE pin statically selects burst address order: HIGH enables interleaved (Intel Pentium-compatible), LOW enables linear. It is a strap pin with internal pull-up, so tying to GND selects linear mode. It must remain static during operation - changing MODE mid-burst causes undefined behavior and violates timing specifications per datasheet Section 7.

Does CY7C1441AV33-133BZXI require an external clock divider or PLL to operate at 133 MHz?

No. The device accepts a clean 133-MHz single-ended CMOS clock directly on the CLK pin. All internal timing-including burst counter advancement, address registration, and output enable synchronization-is derived from this clock. No external frequency synthesis or division is needed, as confirmed by AC switching characteristics table (tSKO, tCH, tCL) in datasheet Rev. *N, Page 22.

Can CE2 be left unconnected, and what is its default logic state?

CE2 is an active-HIGH synchronous chip enable sampled on CLK rise. It has no internal pull-up or pull-down; leaving it floating risks metastability and undefined selection behavior. Per datasheet Section 6.2, CE2 must be actively driven HIGH or LOW - recommended practice is to tie to VDD for enabled operation or to GND for disabled operation, depending on system architecture.

Is the ZZ sleep mode compatible with asynchronous wake-up, and does it affect data retention time?

Yes, ZZ is fully asynchronous: asserting HIGH places the device in sleep mode immediately, regardless of CLK state, and deasserting LOW restores full operation within one clock cycle. Data retention is guaranteed indefinitely under ZZ mode at rated temperature (–40°C to +85°C), as specified in DC Electrical Characteristics (I_SB ≤ 120 mA, V_DD = 3.3 V) and confirmed in Sleep Mode section (Page 8) of datasheet Rev. *N.