Infineon Technologies CY7C1361B-117AC

Overview

CY7C1361B-117AC from Cypress Semiconductor is a 9-Mbit synchronous flow-through SRAM organized as 256K × 36, designed for high-speed cache and buffer applications in Pentium-class microprocessor systems. It operates at 117 MHz with 7.5 ns clock-to-output delay, supports dual VDDQ (2.5 V or 3.3 V), and features user-selectable linear/interleaved burst modes via the MODE pin. Its JEDEC-standard 100-pin TQFP package includes three chip enables (CE1–CE3) and JTAG boundary-scan capability.

For engineers reviewing the CY7C1361B-117AC datasheet, CY7C1361B-117AC pinout, CY7C1361B-117AC application, or CY7C1361B-117AC equivalent, key selection criteria include burst timing control (ADSP/ADSC/ADV), byte-write granularity (BWA–BWD + BWE), synchronous clocked address/data capture, and low-latency flow-through architecture for zero-wait-state CPU interfacing.

Technical Context

The CY7C1361B-117AC implements a synchronous, clock-driven interface where all address, data, and control inputs (except OE and ZZ) are registered on the rising edge of CLK. A 2-bit internal burst counter captures A[1:0] at ADSP/ADSC assertion and auto-increments addresses during burst reads/writes controlled by ADV.

Burst sequencing (linear vs. interleaved) is statically selected by the MODE pin; CE1 (active-low), CE2 (active-high), and CE3 (active-low) enable hierarchical chip selection; GW enables full-word writes independent of byte-write enables; and OE provides asynchronous output tri-state control without affecting internal timing.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), RoHS-compliant, body size 14 mm × 14 mm, 0.5 mm pitch. Pin mapping validated per Cypress Document #38-05302 Rev. *B (Pages 4–5).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1361C-133AC, the -117AC trades 16 MHz speed for lower power and relaxed timing margins; versus IS61LV25636A-10TL, it adds burst flexibility, dual-VDDQ, and sleep mode at higher cost and complexity.

Availability

CY7C1361B-117AC is available at Aetrix Electronics and suitable for high-performance computing, network infrastructure, and industrial control applications requiring stable component supply, long-lifecycle support, and verified timing compliance.

Supply support for CY7C1361B-117AC 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, PSoC, and USB solutions for industrial, automotive, and computing markets.

The CY7C1361B belongs to Cypress's synchronous flow-through SRAM product line, engineered specifically to replace asynchronous SRAMs in Pentium-class CPU cache subsystems while eliminating wait states and minimizing board-level timing complexity.

FAQ

What is the function of the MODE pin on CY7C1361B-117AC?

The MODE pin selects burst sequence type: tied to VDD (or left floating) enables Intel Pentium-style interleaved bursting; tied to GND enables linear bursting. It is a static strap pin-must remain stable during operation-and features an internal pull-up resistor. This eliminates need for external configuration logic and ensures deterministic burst behavior aligned with host processor expectations.

Can CY7C1361B-117AC operate with 2.5 V I/O while maintaining 3.3 V core voltage?

Yes. The device supports independent VDD (3.3 V ±5%) and VDDQ (2.5 V or 3.3 V) supplies. This allows direct interfacing with 2.5 V ASICs or FPGAs while retaining full 3.3 V core performance. VDDQ pins must be decoupled separately, and all I/O signals (DQ, DQP, control) conform to JEDEC JESD8-5 levels at the selected VDDQ voltage.

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

When ZZ is driven HIGH, the device enters non-time-critical sleep mode with data fully retained and ICC reduced to ≤30 mA. No clock is required during sleep. Wake-up occurs synchronously on the first valid CLK edge after ZZ returns LOW, with full functionality restored within one clock cycle-no initialization delay or refresh overhead.

Is the 100-pin TQFP package of CY7C1361B-117AC compatible with standard reflow profiles?

Yes. The JEDEC-standard 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) is rated for lead-free reflow per IPC/JEDEC J-STD-020. Peak temperature tolerance is 260 °C for 10 seconds. Cypress specifies moisture sensitivity level (MSL) 3, requiring bake-out if exposed >168 hours at ambient before reflow.