Infineon Technologies CY7C1361C-100AXCT

Overview

CY7C1361C-100AXCT from Infineon Technologies (formerly Cypress) is a 9-Mbit synchronous flow-through SRAM with 256K × 36 organization, designed for high-speed cache and buffer interfacing in microprocessor systems. It operates at 100 MHz with 8.5 ns clock-to-output access time, supports 3.3 V core (±5%/+10%) and 2.5/3.3 V I/O supplies, and features Intel Pentium-compatible interleaved/linear burst addressing via MODE pin.

For engineers reviewing the CY7C1361C-100AXCT datasheet, CY7C1361C-100AXCT pinout, CY7C1361C-100AXCT application, or CY7C1361C-100AXCT equivalent, key selection criteria include burst sequence control (MODE), dual VDDQ support, JTAG boundary scan compliance, and TQFP-100 package compatibility with CE1/CE2/CE3 chip enables.

Technical Context

This SRAM implements synchronous flow-through architecture with positive-edge-triggered CLK registration of all address, data, and control inputs (ADSP, ADSC, ADV, CE1–CE3, BWx, BWE, GW). Burst addressing is managed by a 2-bit on-chip counter that auto-increments after initial address capture, enabling 2-1-1-1 access rate.

Asynchronous OE and ZZ (sleep mode) pins operate independently of clock; output drivers are JEDEC JESD8-5 compliant; IEEE 1149.1 JTAG boundary scan is integrated and configurable via TAP controller with TDI/TDO/TCK/TMS pins.

Key Specifications

Pinout & Package

Package: Pb-free 100-pin Thin Quad Flat Package (TQFP), 14 mm × 20 mm × 1.4 mm body height, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV25636BLL-10BLI and MT55LSD25636DZ-100:G, CY7C1361C-100AXCT uniquely combines MODE-configurable burst addressing, dual-VDDQ flexibility, and integrated JTAG-making it optimal for upgrade paths from Pentium-era systems requiring testability and voltage compatibility.

Availability

CY7C1361C-100AXCT is available at Aetrix Electronics and suitable for high-speed CPU cache buffers, network packet processing engines, and automotive ADAS pre-processing subsystems requiring stable component supply across extended product lifecycles.

Supply support for CY7C1361C-100AXCT 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

Infineon Technologies is a global semiconductor leader headquartered in Munich, Germany, specializing in power systems, sensors, and memory solutions for industrial, automotive, and communications markets.

CY7C1361C belongs to Infineon's legacy Cypress synchronous SRAM product line, engineered specifically for low-latency, burst-oriented interfacing with high-performance microprocessors and cache controllers.

FAQ

What is the function of the MODE pin on CY7C1361C-100AXCT?

The MODE pin selects burst address sequencing: HIGH configures Intel Pentium-style interleaved addressing (e.g., 0, 8, 4, 12), while LOW enables linear addressing (e.g., 0, 1, 2, 3). This hardware-selectable behavior eliminates software configuration overhead and ensures deterministic timing in cache coherency protocols.

Does CY7C1361C-100AXCT support both 2.5 V and 3.3 V I/O interfaces simultaneously?

No-VDDQ must be set to either 2.5 V or 3.3 V, not both. The device uses a single VDDQ rail to power all DQ and DQP pins; mixing voltages on this rail violates absolute maximum ratings and may damage the part. System design must select one I/O voltage during power-up.

Can CE2 and CE3 be used independently for depth expansion?

Yes-CE2 and CE3 are fully independent chip enables, each controlling separate memory segments. When used with CE1, they enable 3-way depth expansion (e.g., stacking three 256K × 36 devices to form 768K × 36). CE3 is only available on the 3-CE TQFP variant (A version), not the 2-CE AJ version.

Is JTAG boundary scan enabled by default on CY7C1361C-100AXCT?

JTAG is implemented but disabled by default at power-on. It must be activated via the TAP controller using the TEST pin (if present) or through specific power-up sequencing per the datasheet's "Disabling the JTAG Feature" section. No external pull-up/down is required to enable it-activation is purely state-machine driven.