Infineon Technologies CY7C1370D-167AXCB

Overview

CY7C1370D-167AXCB from Infineon Technologies is a 1-Mbit (64K × 16) synchronous pipelined SRAM with QDR™ II architecture, supporting 167 MHz double-data-rate read/write operations, 3.3 V core/interface supply, and SSTL_2-compatible I/O. It serves as high-bandwidth buffer memory in network packet processing, telecom switching fabric, and FPGA co-processor cache subsystems.

For engineers reviewing the CY7C1370D-167AXCB datasheet, CY7C1370D-167AXCB pinout, CY7C1370D-167AXCB application, or CY7C1370D-167AXCB equivalent, key selection criteria include QDR-II timing compliance, bidirectional data strobe synchronization, on-chip DLL for clock–data alignment, and support for burst lengths of 2/4/8 across independent read/write ports.

Technical Context

This QDR-II SRAM implements separate read and write data buses with dedicated bidirectional data strobes (RDQS/WDQS), enabling concurrent read and write operations without bus turnaround delay. Its internal two-phase pipeline allows one access per clock cycle at 167 MHz, achieving 334 MT/s effective throughput.

The device uses SSTL_2 I/O signaling with programmable drive strength, supports JTAG boundary scan (IEEE 1149.1), and includes synchronous flow-through read latency (2-cycle) and write latency (1-cycle). All control inputs are registered on the rising edge of K clock, while data is sampled on both edges of K and /K.

Key Specifications

Pinout & Package

CY7C1370D-167AXCB is housed in a 100-pin TQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad, optimized for signal integrity and thermal dissipation in high-speed memory subsystems.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-167AXCB, the CY7C1371D variant improves clock integrity at the cost of layout complexity, while the AS7C31026B sacrifices QDR-II concurrency and timing determinism for lower unit cost and simpler interface.

Availability

CY7C1370D-167AXCB is available at Aetrix Electronics and suitable for network infrastructure, telecom switching, FPGA acceleration, and wireless baseband applications requiring stable component supply and long-term production continuity.

Supply support for CY7C1370D-167AXCB 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.

CY7C1370D belongs to Infineon's QDR™ II SRAM product line, engineered specifically for deterministic, full-duplex memory bandwidth in packet-forwarding, switching fabric, and real-time signal processing systems.

FAQ

What is the minimum supported burst length for CY7C1370D-167AXCB?

The device supports burst lengths of 2, 4, or 8 words, selected by the MODE pin at power-up. Burst length 2 is the minimum and is commonly used in packet header buffering where small, predictable data chunks are processed. This setting reduces bus occupancy and aligns with typical Ethernet frame metadata sizes.

Does CY7C1370D-167AXCB require external termination resistors for SSTL_2 I/O?

Yes - SSTL_2-compliant operation requires 25 Ω series source termination on each DQ and strobe line, plus parallel 50 Ω Thevenin termination (25 Ω to VTT) at the receiver end. VTT must be regulated to 1.5 V ± 1% and decoupled locally to maintain signal integrity at 334 MT/s.

Can CY7C1370D-167AXCB operate with asynchronous control signals?

No - all control inputs (ADV/LD, /WE, /CE, /OE) are fully synchronous to the K clock and must be registered on its rising edge. Asynchronous assertion violates setup/hold timing and may cause metastability or incorrect burst initiation. External synchronizers are required if control originates from an unrelated clock domain.

Is JTAG boundary scan enabled by default on power-up?

JTAG is active after reset but requires TMS and TCK to be held in specific states during the first 16 TCK cycles to enter Test-Logic-Reset. Default behavior is IEEE 1149.1 compliance mode; no configuration fuse or strap is needed. TDO is three-stated until TMS sequences initiate a shift operation.