Cypress Semiconductor Corp CY7C1525KV18-333BZXC

Overview

CY7C1525KV18-333BZXC from Cypress Semiconductor is an 8M × 9 (72-Mbit) QDR® II SRAM with synchronous pipelined architecture, dual independent read/write ports, 333 MHz clock operation, DDR interfaces on both ports (666 MT/s effective data rate), and 1.8V core / 1.4–1.8V I/O supply. It delivers high-bandwidth buffering for network packet processing in telecom line cards.

For engineers reviewing the CY7C1525KV18-333BZXC datasheet, CY7C1525KV18-333BZXC pinout, CY7C1525KV18-333BZXC application, or CY7C1525KV18-333BZXC equivalent, key selection criteria include burst depth (2-word), read latency (1 or 1.5 cycles depending on DOFF), echo clock support (CQ/CQ), and FBGA-165 package compatibility with HSTL-18 I/O.

Technical Context

This SRAM implements true QDR II architecture with physically separate read and write data paths-no bus turnaround required. It uses two independent input clocks (K/K) for address/data capture and two output clocks (C/C) plus echo clocks (CQ/CQ) to align data sampling at the receiver under tight skew constraints.

The device integrates a PLL for precise internal timing control, supports synchronous self-timed writes, and provides full data coherency via pipelined read-after-write behavior. DOFF pin selects between 1-cycle (LOW) and 1.5-cycle (HIGH) read latency modes, enabling trade-offs between latency and throughput in real-time systems.

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 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 IDT72T3615L10BG and IS61WV102418BLL-10BLI, CY7C1525KV18-333BZXC uniquely delivers 333 MHz DDR dual-port operation with echo clocks and programmable latency-enabling deterministic, high-throughput memory access essential for modern packet-processing pipelines.

Availability

CY7C1525KV18-333BZXC is available at Aetrix Electronics and suitable for telecom infrastructure, high-speed switch fabric, and network test equipment requiring stable component supply, long-lifecycle support, and guaranteed FBGA-165 packaging consistency.

Supply support for CY7C1525KV18-333BZXC 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 memory, microcontrollers, and connectivity solutions for industrial, automotive, and communications markets.

This device belongs to Cypress's QDR® II SRAM product line, engineered specifically for high-bandwidth, low-latency packet buffering and switching applications where concurrent read/write access and precise timing control are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1525KV18-333BZXC?

The DOFF (Data Output OFF) pin selects read latency mode: when asserted HIGH, it enables 1.5-cycle read latency for higher throughput; when LOW, it configures 1-cycle latency for minimal delay. This setting directly affects pipeline depth in connected logic and must be held stable during operation-no dynamic switching is supported.

Does CY7C1525KV18-333BZXC require external termination resistors?

Yes-HSTL-18 I/Os require source-series or parallel termination. VDDQ-referenced parallel termination (e.g., 50 Ω to VTT = VDDQ/2) is recommended for Q[8:0] outputs. D[8:0] inputs use on-die termination calibrated via ZQ pin connected to 240 Ω to ground, eliminating need for external resistors on write data lines.

Can CY7C1525KV18-333BZXC operate with only one clock domain (K = C)?

Yes-the device supports single-clock-domain operation where K and C are tied together. In this mode, read data is registered on the same clock edge as address, resulting in fixed 1-cycle latency regardless of DOFF state. However, echo clock (CQ) functionality is lost, increasing timing margin requirements on PCB layout.

Is JTAG boundary scan supported on CY7C1525KV18-333BZXC, and how is it enabled?

Yes-IEEE 1149.1 JTAG is fully implemented. It is enabled by holding TMS HIGH and applying five TCK pulses during power-up reset. Once active, the TAP controller supports IDCODE, EXTEST, SAMPLE/PRELOAD, and BYPASS instructions. No external pull-ups or configuration pins are needed-the feature is always present and functional after proper reset sequencing.