Infineon Technologies CY7C1367C-166AXC

Overview

CY7C1367C-166AXC from Infineon Technologies (formerly Cypress) is a 9-Mbit synchronous pipelined SRAM configured as 512K × 18, operating at 166 MHz with 3.3 V core supply (VDD), 2.5 V/3.3 V I/O supply (VDDQ), and 3.5 ns clock-to-output delay. It implements registered address/data paths, synchronous self-timed writes, and user-selectable Intel Pentium™-compatible interleaved or linear burst sequences. It is used in high-speed secondary cache subsystems for x86-compatible embedded controllers.

For engineers reviewing the CY7C1367C-166AXC datasheet, CY7C1367C-166AXC pinout, CY7C1367C-166AXC application, or CY7C1367C-166AXC equivalent, key selection criteria include burst mode flexibility, depth-expansion support without wait states, JTAG boundary-scan compliance, ZZ sleep mode behavior, and dual-voltage I/O compatibility for mixed-signaling environments.

Technical Context

This SRAM uses a positive-edge-triggered CLK to register all synchronous inputs-including ADSP/ADSC address strobes, ADV, CE1–CE3, BWx, BWE, GW, and MODE-and drives outputs through registered output buffers. Its two-bit internal burst counter generates sequential addresses during burst reads/writes, with wraparound behavior controlled by the MODE pin state.

The device supports both processor-initiated (ADSP) and controller-initiated (ADSC) access protocols, with priority given to ADSP when both are asserted. Pipelined enable logic delays output buffer disable by one cycle during deselect, enabling seamless depth expansion across multiple devices without performance penalty.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 × 20 × 1.4 mm), Pb-free, with three chip enables (CE1, CE2, CE3) and full JTAG (TCK/TMS/TDI/TDO) support.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C362000B-166BIN and IS61WV51218BLL-166BLI, the CY7C1367C-166AXC uniquely combines JTAG testability, dual-voltage I/O, ZZ sleep, and pipelined depth expansion-making it the only option for safety-critical or high-assurance embedded cache designs requiring traceable validation and power-aware operation.

Availability

CY7C1367C-166AXC is available at Aetrix Electronics and suitable for high-speed secondary cache, industrial motion control, telecom line card buffering, and avionics data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for CY7C1367C-166AXC 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 acquired Cypress Semiconductor in 2020 and maintains full product continuity, documentation, and support for the former Cypress SRAM portfolio.

This device belongs to Infineon's high-performance synchronous SRAM product line, designed specifically for deterministic, low-latency memory subsystems in x86-compatible and real-time embedded computing platforms.

FAQ

What is the function of the MODE pin, and how is it sampled?

The MODE pin selects burst address sequence: LOW enables Intel Pentium™-compatible interleaved addressing, HIGH selects linear addressing. It is sampled only at power-up or hardware reset-not dynamically during operation-and latches the burst mode for the device's entire runtime until next reset.

Can CY7C1367C-166AXC operate with VDDQ = 2.5 V while VDD = 3.3 V?

Yes. The device is explicitly rated for simultaneous 3.3 V core supply (VDD) and 2.5 V I/O supply (VDDQ). This dual-supply operation is validated per JEDEC JESD8-5 and supports direct interfacing to 2.5 V FPGAs or ASICs without level shifters.

How does the pipelined enable register improve depth expansion?

The pipelined enable register delays output buffer disable by one clock cycle after chip deselect. This eliminates the need for wait states when chaining multiple CY7C1367C devices using CE1–CE3, allowing continuous burst transfers across device boundaries at full 166 MHz throughput.

Is JTAG boundary scan functional in ZZ sleep mode?

No. JTAG operation requires the device to be fully powered and active. When ZZ is asserted HIGH, the TAP controller and boundary-scan logic are disabled. JTAG testing must be performed in normal operation mode with ZZ held LOW or floating.