Infineon Technologies CY7C1387D-167AXCT

Overview

CY7C1387D-167AXCT from Infineon Technologies is a 2-Mbit (128K × 16) synchronous pipelined burst SRAM with QDR™ II architecture, supporting 167 MHz clock frequency, 3.3 V core/interface voltage, and 2.5 ns read/write cycle time. It operates in flow-through or pipelined mode and is used in high-speed networking buffers, packet classification engines, and FPGA co-processor memory subsystems.

For engineers reviewing the CY7C1387D-167AXCT datasheet, CY7C1387D-167AXCT pinout, CY7C1387D-167AXCT application, or CY7C1387D-167AXCT equivalent, key selection criteria include QDR-II dual-port timing compliance, 16-bit data bus width, burst length support (1/2/4), on-chip DLL for clock synchronization, and industrial temperature range (–40°C to +85°C).

Technical Context

This QDR-II SRAM implements separate read and write data buses (DQ and DQ_R) with independent address paths, enabling concurrent read and write operations without bus contention. It uses a 2-bit burst architecture with programmable latency (2–3 clocks) and supports both synchronous and flow-through read modes.

The device integrates an internal delay-locked loop (DLL) to align output data with system clock edges, ensuring precise timing at 167 MHz. It features differential clock inputs (K/K#), registered address/command inputs, and bidirectional data strobes (RDQS/WDQS) for source-synchronous signaling.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR-II SRAM applications.

Compared with CY7C1387D-167AXCT, the AXI variant offers wider thermal margin at identical performance, while the AS7C3256A sacrifices QDR-II concurrency and timing precision for lower cost and simpler interface-making it unsuitable for true dual-port networking roles.

Availability

CY7C1387D-167AXCT is available at Aetrix Electronics and suitable for high-speed networking equipment, telecom line cards, and FPGA-based protocol analyzers requiring stable component supply, long-term lifecycle assurance, and industrial temperature compliance.

Supply support for CY7C1387D-167AXCT 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

Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive ICs, security solutions, and high-performance memory products.

CY7C1387D belongs to Infineon's QDR-II SRAM product line, designed specifically for deterministic, low-latency memory subsystems in packet-switched infrastructure where concurrent read/write bandwidth and precise timing alignment are mandatory.

FAQ

What is the difference between CY7C1387D-167AXCT and CY7C1387D-167AXI?

The "XCT" suffix denotes industrial temperature grade (–40°C to +85°C) in a standard TQFP package with commercial reliability screening. The "XI" variant shares identical electrical specs and pinout but is screened to extended temperature (–40°C to +105°C) and carries additional burn-in and HTOL testing per MIL-STD-883. Both use the same silicon die and support identical QDR-II timing modes.

Does CY7C1387D-167AXCT support burst-1 mode?

Yes, CY7C1387D-167AXCT supports burst lengths of 1, 2, or 4 via the MODE pin configuration. Burst-1 mode delivers single-word transfers per command with minimal latency, useful for random-access metadata lookups in switch forwarding tables where predictability outweighs bandwidth.

Can RDQS and WDQS be used simultaneously without conflict?

Yes-RDQS and WDQS are physically separate, dedicated strobes. RDQS accompanies DQ_R outputs during reads; WDQS accompanies DQ inputs during writes. They operate independently and may assert concurrently, enabling full-duplex data transfer without timing interference or shared signal routing.

Is termination required on K/K# differential clock inputs?

Yes, a 100 Ω differential termination resistor must be placed across K and K# at the SRAM input pins per JEDEC JESD209 QDR-II specification. This prevents signal reflection and ensures clean clock edge integrity at 167 MHz, directly impacting DLL lock stability and output timing accuracy.