Infineon Technologies CY7C1356C-250AXCT

Overview

CY7C1356C-250AXCT from Cypress Semiconductor is a 9-Mbit (512K × 18) synchronous pipelined SRAM with NoBL™ architecture, designed for high-throughput memory buffering in networking and telecom data paths. It supports true back-to-back read/write operations at 250 MHz with zero wait states, features 2.8 ns clock-to-output time, single 3.3 V core supply (VDD), and dual-voltage I/O (VDDQ = 3.3 V or 2.5 V).

For engineers reviewing the CY7C1356C-250AXCT datasheet, CY7C1356C-250AXCT pinout, CY7C1356C-250AXCT application, or CY7C1356C-250AXCT equivalent, key selection criteria include burst order configuration (linear/interleaved via MODE pin), byte-write select granularity (BWa–BWb), synchronous self-timed write timing, and TQFP-100 package compatibility with ZBT-class systems.

Technical Context

The CY7C1356C implements fully registered pipelined operation: all address, control, and data inputs are latched on the rising edge of CLK, and all outputs pass through output registers synchronized to CLK. Its NoBL™ logic eliminates bus latency by enabling consecutive read/write cycles without pipeline stalls.

Burst capability supports both linear and interleaved orders selected by the MODE strap pin; write operations use synchronous self-timed circuitry qualified by WE and BWa/BWb, while tristate control of DQs is managed synchronously during write data phases and asynchronously via OE - with OE masked during critical timing windows to prevent bus contention.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 × 20 × 1.4 mm), Pb-free, RoHS-compliant, with exposed thermal pad (not electrically connected). Pin pitch: 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V251L15PF and IS61WV51218BLL-15TLI, CY7C1356C-250AXCT delivers 87% higher bandwidth (250 vs. 133 MHz), eliminates wait-state penalties via NoBL™, and provides configurable burst sequencing - making it uniquely suited for latency-constrained telecom and real-time control buffers.

Availability

CY7C1356C-250AXCT is available at Aetrix Electronics and suitable for high-speed packet buffering, baseband signal processing, PCIe endpoint acceleration, and industrial real-time control applications requiring stable component supply across extended product lifecycles.

Supply support for CY7C1356C-250AXCT 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, microcontrollers, and programmable logic solutions for industrial, automotive, and communications markets.

CY7C1356C belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-latency, high-frequency memory interfaces in networking infrastructure and real-time embedded systems.

FAQ

What is the function of the MODE pin on CY7C1356C-250AXCT?

The MODE pin is a static configuration input that selects burst order: tied HIGH for interleaved burst addressing (e.g., 0, 2, 4, 6…), pulled LOW for linear burst (e.g., 0, 1, 2, 3…). It is sampled at power-up and remains latched; no dynamic reconfiguration is supported during operation.

Does CY7C1356C-250AXCT support 2.5 V I/O operation?

Yes - VDDQ may be supplied at either 2.5 V or 3.3 V, independently of the 3.3 V VDD core supply. This allows direct interfacing with 2.5 V FPGAs or ASICs without level-shifting circuitry, provided VDDQ tolerances (±0.2 V) and drive strength requirements are met per the datasheet AC specs.

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

In ZZ mode (activated by pulling ZZ LOW), the device enters deep sleep: internal clocks halt, output drivers disable, and standby current drops to ≤40 mA. Data retention is maintained across the full industrial temperature range (–40°C to +85°C), and wake-up latency is one clock cycle after ZZ deassertion.

Can CY7C1356C-250AXCT operate without using the ADV/LD pin?

Yes - when ADV/LD is held HIGH continuously, the device operates in auto-increment burst mode. However, for non-sequential accesses or burst termination, ADV/LD must be driven LOW to load a new starting address; omitting this causes incorrect address progression and data corruption.