Infineon Technologies CY7C1525V18-250BZXC

Overview

CY7C1525V18 from Cypress Semiconductor is an 8M × 9 (72-Mbit), 1.8V QDR-II SRAM with separate read/write ports, 250 MHz clock operation, DDR interfaces on both ports (500 MT/s effective data rate), and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It delivers concurrent read/write transactions for high-throughput packet buffering in network line cards.

For engineers reviewing the CY7C1525V18 datasheet, CY7C1525V18 pinout, CY7C1525V18 application, or CY7C1525V18 equivalent, key selection criteria include burst depth (2-word), HSTL-18 I/O compatibility, DLL-assisted timing alignment, echo clock support (CQ/CQ), and x9 data width for parity-aware memory systems.

Technical Context

The CY7C1525V18 implements a synchronous pipelined QDR-II architecture with fully independent read and write ports sharing a multiplexed 22-bit address bus. Address latching occurs on alternate rising edges of K/K clocks, enabling concurrent access without bus turnaround.

It uses dual input clocks (K/K) for write/read control and dual output clocks (C/C) with echo clocks (CQ/CQ) to deskew data capture at the controller. The integrated Delay Lock Loop (DLL) aligns Q[8:0] outputs to C/C edges with sub-cycle precision, supporting reliable 500 MT/s transfers.

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.

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 IS61WV102418B, CY7C1525V18 provides 2.1× higher bandwidth than the IDT part and enables true zero-turnaround operation unlike the ISSI part - essential for deterministic latency in packet-switched systems.

Availability

CY7C1525V18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, high-speed test equipment memory, and avionics data acquisition buffering requiring stable component supply across extended product lifecycles.

Supply support for CY7C1525V18 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, with headquarters in San Jose, CA.

CY7C1525V18 belongs to the QDR-II SRAM product line, engineered specifically for deterministic, high-bandwidth memory subsystems in networking infrastructure and real-time signal processing equipment.

FAQ

What is the minimum VDDQ voltage supported for CY7C1525V18 operation?

The device supports VDDQ from 1.4 V to 1.8 V. At 1.4 V, HSTL-18 output drive strength is reduced but remains compliant with JEDEC HSTL Class I thresholds; full drive capability requires ≥1.5 V. Core VDD must remain at 1.8 V ± 0.1 V regardless of VDDQ setting.

Can CY7C1525V18 operate without the DLL enabled?

Yes - asserting DOFF (low) disables the DLL, reverting to basic clock-to-output timing. However, tAC increases from 1.2 ns to 2.4 ns, and setup/hold margins shrink significantly; this mode is intended only for debug or legacy timing validation, not production use.

How many address bits are required for CY7C1525V18's 8M × 9 organization?

22 address bits (A21:A0) are required. Internally, the device is organized as two 4M × 9 arrays; the address bus is multiplexed for both read and write ports, with read addresses latched on K and write addresses on K rising edges.

Is ZQ pin mandatory for impedance calibration?

ZQ must be connected - either to a 240 Ω resistor to ground (for 48 Ω output impedance tuning) or directly to VDDQ (for minimum impedance mode). Leaving ZQ floating or connecting it to GND violates the absolute maximum ratings and may cause output driver failure.