Infineon Technologies CY7C1339G-133AXE

Overview

CY7C1339G-133AXE from Cypress Semiconductor is a 4-Mbit (128K × 32) pipelined synchronous SRAM with registered I/O, 133-MHz operation, 4.0 ns clock-to-output delay, 3.3V core / 2.5V–3.3V I/O supply support, and user-selectable Intel Pentium®-compatible interleaved or linear burst sequences - deployed in high-speed L2 cache subsystems for embedded x86-compatible controllers.

For engineers reviewing the CY7C1339G-133AXE datasheet, CY7C1339G-133AXE pinout, CY7C1339G-133AXE application, or CY7C1339G-133AXE equivalent, key selection criteria include burst mode configuration (MODE pin), synchronous self-timed write timing, byte-write granularity (BWA–BWD + BWE), ZZ sleep entry/exit latency, and TQFP-100 package compatibility with JEDEC JESD8-5 I/O voltage levels.

Technical Context

The CY7C1339G-133AXE implements a two-bit wraparound burst counter fed by A1/A0, synchronized to CLK rising edges, enabling deterministic address progression during burst reads/writes. All synchronous inputs - including ADSP, ADSC, CE1–CE3, BW[A:D], BWE, GW, and ADV - are registered on the CLK edge, while OE and ZZ operate asynchronously.

Burst sequencing is statically selected via the MODE pin (interleaved when floating/VDD, linear when grounded), and advance control is handled exclusively by the synchronous ADV signal. Write operations are self-timed and support both global (GW-active) and byte-selective (BWE + BW[A:D]) modes, with automatic DQ tristating during writes regardless of OE state.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), lead-free, RoHS-compliant, body size 14 mm × 14 mm, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61LV25616AL-10TLI and AS7C3256B-133JCIN, the CY7C1339G-133AXE uniquely delivers 128K × 32 density with configurable burst order, true pipelined I/O, and hardware sleep - making it irreplaceable in x86-derived embedded cache designs requiring deterministic timing and low-power idle states.

Availability

CY7C1339G-133AXE is available at Aetrix Electronics and suitable for embedded x86 cache subsystems, industrial motion controller buffers, and telecom line card packet buffers requiring stable component supply, long-lifecycle support, and RoHS-compliant TQFP packaging.

Supply support for CY7C1339G-133AXE 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 U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.

The CY7C1339G belongs to Cypress's high-speed synchronous SRAM product line, designed specifically for low-latency, burst-capable cache and buffer applications in clock-synchronous embedded systems with strict timing predictability requirements.

FAQ

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

The MODE pin selects burst address sequence: tied to GND for linear burst, or left floating/VDD for Intel Pentium®-compatible interleaved burst. It is a strap pin with internal pull-up, and must remain static during operation - dynamic switching invalidates burst behavior and may cause address misalignment.

How does the ZZ sleep mode affect timing and data retention?

Asserting ZZ HIGH initiates sleep mode in exactly two clock cycles (tZZS). Data is retained indefinitely while in sleep, and recovery (tZZREC) requires CE1/CE2/CE3/ADSP/ADSC to remain inactive for two full clock cycles after ZZ returns LOW. No pending accesses are completed upon entry.

Can ADSP and ADSC be asserted simultaneously, and what happens?

Yes, ADSP and ADSC may be asserted together, but the device recognizes only ADSP - ADSC is ignored when ADSP is active. This priority scheme enables clean arbitration between processor-initiated and controller-initiated accesses without external logic.

What is the role of ADV during burst operations, and when is it sampled?

ADV is sampled synchronously on the rising edge of CLK and, when LOW, increments the internal two-bit burst counter to generate the next address in sequence. It is ignored during single-access cycles and only active during burst-read or burst-write sequences initiated by ADSP or ADSC.