Infineon Technologies CY7C1371DV33-133BZI

Overview

CY7C1371DV33-133BZI from Cypress Semiconductor is a 3.3 V, 18-Mbit (512K × 36) synchronous flow-through SRAM with NoBL™ architecture, supporting true back-to-back read/write operations at 133 MHz with zero wait states and 6.5 ns clock-to-output delay. It features registered inputs, byte write capability, three chip enables (CE1/CE2/CE3), and asynchronous output enable (OE), deployed in high-bandwidth networking and packet buffering systems.

For engineers reviewing the CY7C1371DV33-133BZI datasheet, CY7C1371DV33-133BZI pinout, CY7C1371DV33-133BZI application, or CY7C1371DV33-133BZI equivalent, key selection criteria include burst mode (linear/interleaved via MODE pin), ZZ sleep mode support, synchronous self-timed writes, JEDEC-compliant 100-pin TQFP package, and VDDQ-compatible 3.3 V/2.5 V I/O operation.

Technical Context

The device implements a synchronous, rising-edge-triggered interface with input registers for all control and address signals, and uses an internal two-bit burst counter driven by A[1:0] to generate sequential addresses during burst reads/writes. The MODE pin selects between linear and interleaved burst orders, while ADV/LD controls address loading versus counter advancement.

NoBL™ architecture eliminates bus latency by enabling immediate data transfer on every clock cycle - no dead cycles between write and read transitions - and integrates synchronous self-timed write circuitry that removes external write timing constraints. Output drivers are synchronously tristated during write data phases to prevent bus contention, independent of OE state.

Key Specifications

Pinout & Package

Available in JEDEC-standard Pb-free 100-pin TQFP (14 × 20 × 1.4 mm) and 165-ball FBGA (13 × 15 × 1.4 mm). This entry covers the 100-pin TQFP variant (suffix 'BZI').

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L133BG and IS61WV102436BLL-133TQLI, CY7C1371DV33-133BZI uniquely combines NoBL™ latency elimination, integrated ZZ sleep, and JTAG testability - making it optimal for next-gen telecom and networking equipment requiring both performance and production testability.

Availability

CY7C1371DV33-133BZI is available at Aetrix Electronics and suitable for high-speed packet buffering, network switch fabric memory, and telecom line card applications requiring stable component supply, long-term lifecycle assurance, and JEDEC-compliant 100-pin TQFP packaging.

Supply support for CY7C1371DV33-133BZI 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 solutions for industrial, automotive, and communications markets.

The CY7C1371DV33 belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-wait-state, high-throughput data buffering in networking ASIC interfaces and real-time signal processing subsystems.

FAQ

What does "NoBL™" mean and how does it improve system performance?

NoBL™ (No Bus Latency) eliminates dead cycles between consecutive read and write operations by enabling data transfer on every clock edge. Unlike traditional SRAMs requiring wait states or turnaround cycles, CY7C1371DV33-133BZI achieves true back-to-back access - increasing effective bandwidth by up to 30% in burst-intensive applications like packet switching and video streaming.

Can the device operate with 2.5 V I/O while maintaining 3.3 V core voltage?

Yes. VDD (core) must be 3.3 V ± 0.3 V, while VDDQ (I/O) can be independently set to either 3.3 V or 2.5 V. This dual-supply flexibility allows direct interfacing with 2.5 V FPGAs or ASICs without external level shifters, reducing BOM count and signal integrity risk in mixed-voltage systems.

How is burst order selected, and what impact does it have on system design?

Burst order is selected via the MODE pin: tied to GND for linear (0,1,2,3), or to VDD/floating for interleaved (0,2,1,3). Linear mode suits raster-scan video or sequential DMA transfers; interleaved mode matches CPU cache-line fetch patterns. The choice affects address generation logic in the host controller but requires no firmware change.

Is JTAG boundary scan supported, and what are its practical benefits?

Yes - the device implements IEEE 1149.1 JTAG with full boundary scan capability. This enables automated PCB test coverage for solder joint integrity and interconnect verification during manufacturing, reducing debug time for high-density TQFP layouts and supporting production traceability requirements in telecom and aerospace applications.