Infineon Technologies CY7C1426AV18-300BZXC

Overview

CY7C1426AV18-300BZXC from Cypress Semiconductor is a 36-Mbit QDR-II SRAM with 4M × 9 organization, 300 MHz clock frequency, DDR interfaces on independent read/write ports, and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It delivers 600 MT/s data transfer rate per port and supports concurrent read/write operations in high-bandwidth networking buffers and packet processing ASIC/FPGA interfaces.

For engineers reviewing the CY7C1426AV18-300BZXC datasheet, CY7C1426AV18-300BZXC pinout, CY7C1426AV18-300BZXC application, or CY7C1426AV18-300BZXC equivalent, key selection criteria include burst depth (4-word), I/O voltage (VDDQ = 1.4–1.8 V), HSTL-compatible output drive, DLL-enabled timing accuracy, and JTAG 1149.1 test access support.

Technical Context

The device implements true dual-port synchronous pipelined architecture with physically separate read and write data paths-no bus turnaround required. Address latching occurs on alternating rising edges of K/K clocks, enabling full concurrency between ports while sharing one multiplexed address bus.

Each port uses DDR signaling: data transfers occur on both rising edges of C/C for reads and K/K for writes, achieving effective 600 MHz data rates at 300 MHz clock input. Echo clocks CQ/CQ are phase-aligned to C/C to simplify high-speed capture at the controller, and the internal Delay Lock Loop (DLL) ensures precise data-to-clock alignment under process/voltage/temperature variation.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, 0.8 mm ball pitch, RoHS-compliant Pb-free finish (BZXC suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-bandwidth dual-port SRAM applications.

Compared with IDT72T3615L10PF and IS61WV102418B, CY7C1426AV18-300BZXC offers optimal balance of 300 MHz operation, proven QDR-II interoperability with Xilinx/Altera FPGAs, and mature production availability - making it preferred for volume networking equipment.

Availability

CY7C1426AV18-300BZXC is available at Aetrix Electronics and suitable for high-speed packet buffering, network switch fabric interfaces, FPGA-based protocol acceleration, and telecom line card control memory requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1426AV18-300BZXC 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) designs high-performance memory and programmable solutions for communications, industrial, and automotive markets.

The QDR-II SRAM product line targets high-throughput, low-latency memory interfacing in networking ASICs, FPGAs, and packet-processing systems where concurrent read/write bandwidth is critical.

FAQ

What is the minimum VDDQ voltage supported for reliable operation?

The CY7C1426AV18-300BZXC specifies VDDQ = 1.4 V to 1.8 V. Operation below 1.4 V is not characterized or guaranteed - HSTL Class I output drive strength and input threshold margins degrade outside this range, risking setup/hold violations at 300 MHz. Always maintain VDDQ ≥ 1.4 V with ≤ ±3% ripple.

Can C and C be driven from the same differential clock source as K and K?

Yes - C and C may share the same differential clock generator as K and K, provided board layout maintains matched trace lengths and controlled impedance. The device internally separates clock domains; however, using independent sources improves jitter tolerance and simplifies timing closure in multi-device systems.

Is ZQ calibration required before normal operation?

Yes - ZQ calibration must be performed once at power-up by connecting ZQ to an external 120 Ω resistor to ground. This configures output drivers to match 50 Ω transmission lines. Skipping calibration results in excessive signal overshoot/undershoot and fails HSTL compliance, especially above 200 MHz.

Does the device support single-ended clocking on K/K or C/C inputs?

No - K/K and C/C inputs require true differential signaling per HSTL specification. Driving only K or only C violates AC timing parameters and causes metastability in internal registers. Single-ended use is unsupported and invalidates all published timing specs including tSKO and tDSH.