Infineon Technologies CY7C1356C-166AXI

Overview

CY7C1356C-166AXI from Cypress Semiconductor is a 9-Mbit (512K × 18) synchronous pipelined SRAM with NoBL™ architecture, designed for high-throughput memory buffering in network packet processors and telecom line cards. It operates at 166 MHz with zero wait states, supports 3.3 V core supply and 2.5/3.3 V I/O, and delivers 3.5 ns clock-to-output access time.

For engineers reviewing the CY7C1356C-166AXI datasheet, CY7C1356C-166AXI pinout, CY7C1356C-166AXI application, or CY7C1356C-166AXI equivalent, this device is selected for systems requiring deterministic burst read/write timing, byte-selectable writes, and JTAG boundary-scan testability in space-constrained TQFP layouts.

Technical Context

The CY7C1356C-166AXI implements fully registered synchronous interfaces: all address, control, and data inputs are latched on the rising edge of CLK, and all outputs are driven from output registers synchronized to CLK. Its NoBL™ logic eliminates bus latency by enabling back-to-back read/write operations without wait states.

Burst operation supports both linear and interleaved orders via the MODE strap pin; write cycles use on-chip self-timed control with synchronous byte enables (BWa–BWb); output drivers are synchronously tristated during write data phases to prevent bus contention.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), RoHS-compliant, body size 14 mm × 20 mm × 1.4 mm, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L16PF and IS61WV51218BLL-166TQLI, the CY7C1356C-166AXI uniquely combines JTAG testability, programmable burst order, and deep-sleep mode in a pin-compatible ZBT-equivalent package - making it optimal for telecom and networking designs requiring production test coverage and dynamic power management.

Availability

CY7C1356C-166AXI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and baseband processor cache applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for CY7C1356C-166AXI 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 high-performance memory, PSoC, and USB solutions for industrial, automotive, and communications markets.

The CY7C1356C belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-latency, high-frequency memory interfacing in telecom infrastructure and packet-switching equipment.

FAQ

What is the function of the MODE pin on CY7C1356C-166AXI?

The MODE pin is a static configuration input that selects burst address order: tied HIGH for interleaved burst (required by many framer ASICs), pulled LOW for linear burst. It is sampled at power-up and cannot be changed dynamically during operation. This pin eliminates need for external logic to generate burst addresses, reducing design complexity and PCB area.

Does CY7C1356C-166AXI support 2.5 V I/O operation with 3.3 V core supply?

Yes - VDD is fixed at 3.3 V ± 0.3 V for core logic, while VDDQ accepts either 2.5 V ± 0.2 V or 3.3 V ± 0.3 V to match interfacing logic voltage levels. The datasheet specifies separate AC/DC characteristics for each VDDQ condition, and both are fully supported in the 100-pin TQFP package without derating.

How does the ZZ (sleep) mode affect data retention and wake-up time?

In ZZ mode, ICC drops to ≤5 mA while retaining full memory contents; wake-up is asynchronous and completes within one CLK cycle after ZZ is deasserted. No initialization sequence is required - the device resumes normal operation immediately upon exit, preserving burst counter state and pending transactions.

Is the CY7C1356C-166AXI pin-compatible with ZBT SRAMs?

Yes - it is explicitly designed as pin-compatible and functionally equivalent to ZBT SRAMs such as the IDT ZBT-18V919. Signal mapping (A0–A18, BWa/BWb, CE1/CE2/CE3, CLK, CEN, OE, DQa–DQb) matches ZBT footprints, enabling drop-in replacement in existing designs without layout changes.