Infineon Technologies CY7C1356C-166AXCT

Overview

CY7C1356C-166AXCT 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 3.5 ns clock-to-output delay, supports burst reads/writes (linear or interleaved), and uses single 3.3 V VDD with selectable 3.3 V/2.5 V VDDQ I/O supply.

For engineers reviewing the CY7C1356C-166AXCT datasheet, CY7C1356C-166AXCT pinout, CY7C1356C-166AXCT application, or CY7C1356C-166AXCT equivalent, key selection criteria include its zero-wait-state pipelined operation, byte-write capability across four data groups, synchronous self-timed write control, and support for IEEE 1149.1 JTAG boundary scan in the 100-pin TQFP package.

Technical Context

The CY7C1356C implements fully registered synchronous interfaces: all address, control, and data inputs pass through input registers on CLK rising edge; all DQ outputs are latched on the same edge. Its NoBL™ logic eliminates bus latency by enabling back-to-back read/write cycles without wait states, using internal burst counters and ADV/LD-controlled address sequencing.

It features three chip enables (CE1 active-low, CE2 active-high, CE3 active-low) for flexible bank decoding, synchronous CEN to gate CLK without deselection, and asynchronous OE with automatic tristate during write data windows. The MODE pin selects linear or interleaved burst order, and ZZ sleep mode reduces standby current to 40 mA.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 × 20 × 1.4 mm), Pb-free, RoHS-compliant, with standard JEDEC footprint and thermal pad compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L15PF and IS61WV51218BLL-166TQLI, the CY7C1356C-166AXCT uniquely combines VDDQ voltage flexibility, ZZ sleep mode, and IEEE 1149.1 JTAG-making it optimal for upgradable, thermally managed, and production-testable telecom infrastructure.

Availability

CY7C1356C-166AXCT is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processor cache, and industrial PLC data logging requiring stable component supply across extended product lifecycles.

Supply support for CY7C1356C-166AXCT 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 analog/digital ICs for industrial, automotive, and communications markets.

The CY7C1356C belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-latency, high-frequency buffering in networking and telecom infrastructure where deterministic timing and burst efficiency are mandatory.

FAQ

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

The MODE pin is a strap input that configures burst address sequencing: tied HIGH enables interleaved burst order (e.g., 0, 2, 4, 6… then 1, 3, 5, 7…), while pulled LOW selects linear burst (0, 1, 2, 3…). This matches host processor or DMA controller burst patterns without firmware overhead, and must be set at power-up before initialization.

Does CY7C1356C-166AXCT support 2.5 V I/O operation?

Yes-CY7C1356C-166AXCT supports 2.5 V VDDQ for its DQ and DQP I/O pins while maintaining 3.3 V VDD for core logic. This allows direct interfacing with 2.5 V FPGA I/O banks or ASICs without external level shifters, verified per datasheet Section "Electrical Characteristics" under "VDDQ Operating Range".

How does the ZZ (sleep) mode reduce power consumption?

In ZZ mode (pin driven LOW), the device enters deep sleep, reducing ICC standby current to 40 mA-unchanged across speed grades. Core logic clocks halt, but SRAM data retention is maintained. Exit requires ZZ HIGH followed by two valid CLK cycles before normal operation resumes, as defined in the "Sleep Mode" section of the datasheet.

Is CY7C1356C-166AXCT pin-compatible with ZBT SRAMs?

Yes-the CY7C1356C-166AXCT is explicitly stated in its datasheet as pin-compatible and functionally equivalent to ZBT SRAMs (e.g., IDT ZBT series), supporting identical control protocols, timing models, and pin assignments in the 100-pin TQFP package, enabling drop-in replacement in existing ZBT-based designs.