Cypress Semiconductor Corp CY7C1371KVE33-133AXI

Overview

CY7C1371KVE33-133AXI 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) for high-throughput memory buffering in network packet processors and telecom line cards.

For engineers reviewing the CY7C1371KVE33-133AXI datasheet, CY7C1371KVE33-133AXI pinout, CY7C1371KVE33-133AXI application, or CY7C1371KVE33-133AXI equivalent, key selection criteria include burst order control (linear/interleaved), synchronous byte write capability (BWA–BWD), ZZ sleep mode for low-power standby, and ECC-enabled soft error resilience in mission-critical systems.

Technical Context

The device implements a fully synchronous interface with registered inputs sampled on the rising edge of CLK, qualified by CEN. All reads and writes are self-timed internally-eliminating external OE timing constraints and enabling deterministic 133 MHz operation without dead cycles between consecutive accesses.

It integrates dual-burst logic (linear or interleaved via MODE pin), on-chip ECC encoding/decoding for single-bit correction and double-bit detection, and three chip enables (CE1 active-low, CE2 active-high, CE3 active-low) for flexible bank expansion in multi-SRAM configurations.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L133PF and IS61WV102436BLL-133TQLI, CY7C1371KVE33-133AXI uniquely delivers integrated ECC, selectable burst order, and NoBL™-enabled zero-latency operation-making it optimal for safety-critical or latency-sensitive designs where reliability and throughput are co-constrained.

Availability

CY7C1371KVE33-133AXI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and radar signal processing requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CY7C1371KVE33-133AXI 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 connectivity solutions for industrial, automotive, and communications markets.

CY7C1371KVE33-133AXI belongs to Cypress's NoBL™ SRAM product line, engineered specifically for systems demanding deterministic, high-bandwidth memory access with built-in data integrity-targeting networking infrastructure and real-time signal processing.

FAQ

What is the function of the MODE pin on CY7C1371KVE33-133AXI?

The MODE pin is a static configuration input that selects burst addressing order: tied to GND for linear burst (0,1,2,3…), or to VDD/floating for interleaved burst (0,2,4,6…,1,3,5,7…). It is sampled at power-up and remains fixed during operation-no dynamic reconfiguration is supported.

Does CY7C1371KVE33-133AXI require an external clock buffer for 133 MHz operation?

No. The device accepts a clean, single-ended CMOS clock directly at the CLK pin. Input timing specifications assume 1.5 ns max skew and 40–60% duty cycle; no external buffering is needed unless board-level skew exceeds these limits or multiple devices share a daisy-chained clock tree.

How does the ZZ sleep mode interact with data retention and wake-up timing?

In ZZ mode (pin driven HIGH), core power drops significantly while VDD and VDDQ remain powered; data is retained indefinitely as long as supply voltages stay within operating range. Wake-up is asynchronous and complete within one CLK cycle after ZZ returns LOW-no initialization sequence is required.

Can CY7C1371KVE33-133AXI operate in 1M × 18 mode without hardware modification?

Yes. The 512K × 36 / 1M × 18 configuration is determined solely by address mapping: using A[18:0] addresses 1M × 18; using A[18:1] with A0 ignored maps to 512K × 36. No strapping or register setting is needed-the same physical device supports both modes via controller address decoding.