Infineon Technologies CY7C1356C-250AXC

Overview

CY7C1356C-250AXC 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 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-250AXC datasheet, CY7C1356C-250AXC pinout, CY7C1356C-250AXC application, or CY7C1356C-250AXC equivalent, key selection criteria include burst order configuration (linear/interleaved via MODE pin), byte-write granularity (BWa–BWb), synchronous self-timed write control, JTAG boundary-scan support, and TQFP-100 package compatibility with ZBT-family designs.

Technical Context

The CY7C1356C-250AXC 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 addressing is configurable via the MODE strap pin (linear or interleaved), and write operations are controlled synchronously using WE and two byte-write enables (BWa, BWb). Output drivers are automatically tristated during write data phases to prevent bus contention, independent of OE state.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), 14 × 20 × 1.4 mm, lead-free (Pb-free) compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L15PF and IS61WV51218BLL-15BLI, the CY7C1356C-250AXC delivers 88% higher bandwidth (250 vs. 133 MHz), configurable burst ordering, and integrated power management (ZZ mode), making it optimal for next-generation telecom and real-time embedded systems demanding deterministic latency and low dynamic power.

Availability

CY7C1356C-250AXC is available at Aetrix Electronics and suitable for telecom infrastructure, network packet processing, baseband signal conditioning, and industrial real-time control applications requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1356C-250AXC 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 logic 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 buffering in systems where back-to-back read/write transitions dominate the access pattern.

FAQ

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

The MODE pin is a static strap input that selects burst addressing order: tied HIGH for interleaved burst, pulled LOW for linear burst. It is sampled only at power-up and cannot be changed dynamically during operation. This configuration determines how the internal address counter increments during burst reads/writes and must match the host controller's expected burst sequence.

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

Yes - the device supports 2.5 V I/O operation via the VDDQ supply pin, which is independent of the 3.3 V VDD core supply. When VDDQ = 2.5 V, all I/O signals (DQa–DQb, DQPa–DQPb, BWa–BWb, etc.) operate at 2.5 V logic levels, enabling direct interface with 2.5 V FPGAs or ASICs without external level translation.

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

In ZZ mode (activated by pulling ZZ LOW), the device disables internal clocks, memory array biasing, and output drivers, reducing CMOS standby current to ≤40 mA - identical across all speed grades. This state retains data but halts all access; exit requires ZZ HIGH followed by CEN HIGH and a valid CLK edge, with tZZMAX = 20 ns maximum wake-up delay.

Is CY7C1356C-250AXC pin-compatible with ZBT SRAMs?

Yes - the CY7C1356C-250AXC is explicitly designed as pin-compatible and functionally equivalent to standard ZBT SRAMs (e.g., IDT ZBT series). Its pinout, signal naming, timing behavior, and control protocol align with JEDEC ZBT specifications, allowing drop-in replacement in existing ZBT-based designs without layout or firmware changes.