Cypress Semiconductor Corp CY7C1525KV18-250BZC

Overview

CY7C1525KV18 from Cypress Semiconductor is an 8M × 9 (72-Mbit) QDR® II SRAM with separate read/write ports, 350 MHz clock support, DDR interfaces on both ports (700 MT/s effective data rate), and 1.8V core / 1.4–1.8V I/O supply. It delivers concurrent high-bandwidth memory access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1525KV18 datasheet, CY7C1525KV18 pinout, CY7C1525KV18 application, or CY7C1525KV18 equivalent, key selection criteria include burst depth (2-word), read latency (1 or 1.5 cycles depending on DOFF), FBGA-165 package compatibility, HSTL-18 I/O compliance, and JTAG 1149.1 testability.

Technical Context

The CY7C1525KV18 implements a synchronous pipelined QDR II architecture with independent read and write ports sharing a multiplexed 22-bit address bus. Read and write operations are latched on alternate rising edges of the K clock, enabling true concurrency without bus turnaround.

It uses dual input clocks (K/K̄) for DDR timing control and echo clocks (CQ/CQ̄) to simplify high-speed data capture. A built-in PLL ensures precise data placement, while DOFF pin selects between 1-cycle (LOW) and 1.5-cycle (HIGH) read latency modes.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and IS61WV102418BLL-10BLI, the CY7C1525KV18 uniquely delivers 500 MT/s DDR bandwidth per port, source-synchronous echo clocks, and configurable 1/1.5-cycle latency - essential for modern packet-processing and test instrumentation where timing margin and concurrency are critical.

Availability

CY7C1525KV18 is available at Aetrix Electronics and suitable for network infrastructure, semiconductor test equipment, wireless baseband processing, and FPGA-accelerated computing requiring stable component supply across multi-year production cycles.

Supply support for CY7C1525KV18 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 connectivity solutions for industrial, automotive, and communications markets.

The QDR® II SRAM product line was designed specifically for ultra-high-bandwidth, low-latency buffering in networking and test equipment - prioritizing deterministic timing, concurrent access, and signal integrity at multi-GHz data rates.

FAQ

What is the function of the DOFF pin on CY7C1525KV18?

The DOFF (Data Output OFFset) pin configures read latency mode: when asserted HIGH, it enables 1.5-cycle read latency for optimized QDR II performance; when LOW, it reduces latency to 1 cycle for backward compatibility with QDR I controllers. This setting affects internal pipeline staging but does not alter timing parameters like tAC or tHZ.

Can CY7C1525KV18 operate with only one clock domain (K-only)?

Yes - the device supports single-clock-domain operation using only the K clock for both address latching and data capture, with C and C̄ tied to K. However, this sacrifices timing margin: echo clocks (CQ/CQ̄) and separate C/C̄ are required to achieve full 250 MHz DDR performance with guaranteed setup/hold margins in high-speed PCB layouts.

What is the purpose of BWS0 in the CY7C1525KV18 pinout?

BWS0 (Byte Write Select 0) is an active-low signal that enables or disables writing to all 9 data bits (D[8:0]) during a write transaction. When deasserted (HIGH), incoming data is ignored; when asserted (LOW), D[8:0] is written to the addressed location. Unlike nibble-select variants, BWS0 controls the full 9-bit word in this x9 configuration.

Is the CY7C1525KV18 pin-compatible with other devices in the CY7C15xxKV18 family?

No - although all share the same 165-ball FBGA package and core pinout (K, C, CQ, DOFF, etc.), data bus width differs: CY7C1510KV18 is x8 (D[7:0]/Q[7:0]), CY7C1525KV18 is x9 (D[8:0]/Q[8:0]), CY7C1512KV18 is x18, and CY7C1514KV18 is x36. Pin assignments for D/Q signals and write-select lines (NWS vs. BWS) are configuration-specific and not interchangeable.