Cypress Semiconductor Corp CY7C2570KV18-400BZC

Overview

CY7C2570KV18 from Cypress Semiconductor is a 72-Mbit synchronous pipelined SRAM with DDR II+ architecture, configured as 2M × 36-bit, supporting 2-word burst reads at 2.5-cycle latency. It operates at 400 MHz clock frequency (800 MT/s effective data rate), features on-die termination (ODT) for DQ/BWS/K/K inputs, and uses HSTL I/O with VDD = 1.8 V and VDDQ = 1.4–1.8 V. It is deployed in high-bandwidth packet buffering for network line cards.

For engineers reviewing the CY7C2570KV18 datasheet, CY7C2570KV18 pinout, CY7C2570KV18 application, or CY7C2570KV18 equivalent, key selection criteria include 2M × 36 organization, 400 MHz K-clock timing, ODT support on 36-bit data bus, echo clocks CQ/CQ for source-synchronous capture, and QVLD-driven data validity signaling.

Technical Context

This device implements a synchronous pipelined SRAM core with DDR II+ interface logic, where address and control signals are registered on rising edges of K clock only, while write data and read data transfer on both K and K rising edges. The 2-word burst mode reduces address bus toggling frequency by half relative to single-word access.

It integrates a PLL for precise internal timing alignment, supports programmable ODT impedance selection via ODT pin and ZQ calibration resistor, and delivers valid output data synchronized to echo clocks CQ/CQ with QVLD assertion aligned to those edges - eliminating need for external strobes in high-speed systems.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm body, 1.4 mm height, 0.8 mm ball pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed synchronous SRAM applications.

Compared with AS7C3256B-15JCIN and IS61WV204836BLL-10BLI, CY7C2570KV18 uniquely delivers DDR II+ burst throughput at 400 MHz with integrated ODT and echo-clock synchronization - essential for FPGA-ASIC interconnects where signal integrity and timing predictability outweigh cost sensitivity.

Availability

CY7C2570KV18 is available at Aetrix Electronics and suitable for network packet buffering, FPGA co-processor caching, and telecom baseband processing requiring stable component supply across extended product lifecycles.

Supply support for CY7C2570KV18 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 networking, automotive, and industrial systems.

CY7C2570KV18 belongs to the QDR II+ SRAM product line, engineered specifically for deterministic, high-bandwidth data buffering in packet-switched infrastructure where DDR timing precision and on-die signal integrity features are mandatory.

FAQ

What is the function of the DOFF pin on CY7C2570KV18?

The DOFF (Data Output OFF) pin selects read latency mode: when asserted HIGH, it configures the device for 2.5-cycle read latency; when LOW, it reverts to 1-cycle latency like standard DDR I devices. This allows runtime optimization between bandwidth and pipeline depth in FPGA-based systems.

How does the ZQ pin work with ODT calibration?

ZQ connects to an external 240 Ω resistor to ground, enabling internal calibration of on-die termination resistance and output driver strength. During power-up initialization, the device measures ZQ and adjusts ODT values to match target impedance - ensuring consistent signal integrity across voltage and temperature variations.

Can CY7C2570KV18 operate with only a single-ended clock?

No. The device requires differential K and K clock inputs for DDR data transfers. While address and control signals use K only, data input/output timing depends on both edges - using only K violates AC timing specifications and will cause data corruption or failure to meet 400 MHz operation.

Is JTAG boundary scan supported on CY7C2570KV18?

Yes. The device implements IEEE 1149.1 JTAG TAP with TDI, TDO, TCK, and TMS pins. Boundary scan supports interconnect testing of all 165 balls, including DQ, BWS, and clock nets - validated per Cypress Application Note AN54117 for telecom board certification.