Infineon Technologies CY7C1371KV33-133AXCT

Overview

CY7C1371KV33-133AXCT from Cypress Semiconductor is a 18-Mbit synchronous flow-through SRAM with NoBL™ architecture and on-chip ECC, configured as 512K × 36 or 1M × 18. It supports true back-to-back read/write operations at 133 MHz with zero wait states, 6.5 ns clock-to-output delay, and 3.3 V/2.5 V I/O (VDDQ). Used in high-throughput packet buffering and network switching ASIC interfaces.

For engineers reviewing the CY7C1371KV33-133AXCT datasheet, CY7C1371KV33-133AXCT pinout, CY7C1371KV33-133AXCT application, or CY7C1371KV33-133AXCT equivalent, key selection criteria include burst order control (linear/interleaved), synchronous byte write capability (BWA–BWD), three chip enables for depth expansion, and ZZ sleep mode for low-power standby.

Technical Context

This SRAM implements a synchronous, clocked interface with registered address, data, and control inputs sampled on the rising edge of CLK, qualified by CEN. The NoBL™ architecture eliminates bus latency by enabling consecutive read/write cycles without dead cycles - data transfers occur on every clock edge.

It integrates on-chip ECC encoding/decoding to reduce soft error rate, supports linear or interleaved burst orders via MODE pin strapping, and uses internal self-timed output buffer control to eliminate external OE timing constraints. Synchronous writes are controlled by WE and four byte-write enables (BWA–BWD), while asynchronous OE provides tristate control independent of clock timing.

Key Specifications

Pinout & Package

Package: 100-pin JEDEC-standard Pb-free TQFP (14 × 20 × 1.4 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AS7C361024B-133BIN and IS61WV102432BLL-133TQLI, the CY7C1371KV33-133AXCT uniquely delivers ECC + NoBL™ + configurable burst order + synchronous byte write in a single 100-pin package - essential for radiation-aware, latency-constrained networking systems.

Availability

CY7C1371KV33-133AXCT is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, radar signal processing cache, and industrial PLC data logging requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1371KV33-133AXCT 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) designs high-performance memory and programmable solutions for automotive, industrial, and communications markets.

The CY7C1371KV33 series belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-latency, high-throughput data buffering in networking ASIC and FPGA co-processing subsystems.

FAQ

What is the function of the MODE pin on CY7C1371KV33-133AXCT?

The MODE pin is a static strap input that determines burst addressing sequence: tied to GND it configures linear burst order (0,1,2,3…), while tied to VDD or left floating selects interleaved burst (0,2,4,6…,1,3,5,7…). This setting is latched at power-up and cannot be changed dynamically during operation.

Does CY7C1371KV33-133AXCT support asynchronous reads?

No - all accesses are strictly synchronous to the rising edge of CLK. Even OE is asynchronous for tristate control, but data output timing remains clock-aligned with tAC = 6.5 ns. There is no asynchronous read mode; the device requires continuous clocking for valid output generation.

How does the ZZ pin affect power consumption and data retention?

When ZZ is driven HIGH, the device enters a non-time-critical sleep mode with core clocks gated and I/O drivers disabled, reducing ICC to ≤5 mA (typical). Data integrity is fully preserved; no refresh or reinitialization is needed upon wake-up. The internal pull-down ensures safe default LOW state if left unconnected.

Can CY7C1371KV33-133AXCT operate with 2.5 V VDDQ while using 3.3 V VDD?

Yes - VDD (core) must be 3.3 V ±0.3 V, while VDDQ (I/O) is independently configurable for 3.3 V or 2.5 V operation. This dual-supply flexibility allows direct interfacing with 2.5 V FPGAs or ASICs without level shifters, provided VDDQ stability and decoupling meet datasheet AC specifications.