Infineon Technologies CY7C1371C-100AC

Overview

CY7C1371C-100AC from Cypress Semiconductor is a 18-Mbit synchronous flow-through SRAM (512K × 36-bit organization) with NoBL™ architecture, designed for high-throughput memory subsystems requiring zero-wait-state back-to-back read/write operations at 100 MHz. It features 8.5 ns clock-to-output delay, 3.3 V core/I/O supply, and three synchronous chip enables for depth expansion in networking and telecom data buffers.

For engineers reviewing the CY7C1371C-100AC datasheet, CY7C1371C-100AC pinout, CY7C1371C-100AC application, or CY7C1371C-100AC equivalent, key selection criteria include burst order control (linear/interleaved), synchronous byte write capability, JTAG boundary scan support (BGA/fBGA), ZZ sleep mode power management, and JEDEC-standard 100-pin TQFP packaging compatibility.

Technical Context

The CY7C1371C-100AC implements a fully synchronous, clocked interface with registered address, data, and control inputs sampled on the rising edge of CLK. Its NoBL™ architecture eliminates bus latency by enabling consecutive read/write cycles without dead cycles - data transfers occur on every clock edge.

It integrates an on-chip burst counter (driven by A[1:0]), self-timed write circuitry, synchronous output buffer control (eliminating OE timing dependency), and automatic tri-state management during write data phases. The MODE pin selects linear or interleaved burst order, while CEN suspends clock recognition without deselecting the device.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flat Package (TQFP), JEDEC standard, body size 14 mm × 14 mm, 0.5 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72V2115L10PF and IS61WV51236BLL-100TQLI, the CY7C1371C-100AC uniquely delivers true zero-latency read-after-write performance, MODE-configurable burst sequencing, and integrated ZZ sleep - making it optimal for jitter-sensitive telecom and deterministic industrial control buffers.

Availability

CY7C1371C-100AC is available at Aetrix Electronics and suitable for telecom line card buffering, network processor co-processor memory, and FPGA-based protocol accelerator applications requiring stable component supply, long-lifecycle support, and JEDEC-standard TQFP packaging.

Supply support for CY7C1371C-100AC 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.

The CY7C1371C belongs to Cypress's NoBL™ SRAM product line, engineered specifically for zero-latency, high-bandwidth memory subsystems in packet-processing, switching, and real-time control applications.

FAQ

What is the function of the MODE pin on CY7C1371C-100AC?

The MODE pin selects burst addressing sequence: tied to GND for linear burst order (e.g., 0,1,2,3), or to VDD/floating for interleaved order (e.g., 0,2,1,3). This setting is latched at power-up and remains static during operation - no runtime reconfiguration is supported. It directly affects how the internal 2-bit burst counter increments A[1:0].

Does CY7C1371C-100AC require an external clock buffer for 100 MHz operation?

No external clock buffer is required. The device accepts a clean 100 MHz single-ended CMOS clock directly on the CLK pin, provided signal integrity meets t_SK(CLK–CEN) < 1.5 ns skew and V_IH/V_IL thresholds are met. CEN gating allows clock pause without violating setup/hold on other inputs, eliminating need for complex clock tree management.

How does the ZZ pin interact with CE and CEN during power management?

ZZ is asynchronous and overrides CE/CEN: asserting ZZ HIGH forces immediate entry into low-power sleep mode regardless of CE or CEN state, preserving data without clock or enable dependencies. Exiting sleep requires ZZ LOW followed by valid CE assertion and CLK edge - no minimum ZZ pulse width is specified, but 10 ns is recommended for robustness.

Can CY7C1371C-100AC support mixed 36-bit and 18-bit data accesses?

No - the CY7C1371C is fixed at 512K × 36 organization. While the CY7C1373C variant offers 1M × 18, the -100AC suffix confirms this is the 36-bit version. Byte write enables (BWA–BWD) allow partial writes, but full-width reads/writes always involve all 36 data bits plus 4 parity bits (DQPA–DQPD).