Infineon Technologies CY7C1512V18-250BZIT

Overview

CY7C1512V18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 250 MHz QDR-II SRAM with separate read/write ports, DDR interfaces on both ports (500 MT/s effective data rate), and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It operates at core VDD = 1.8 V ±0.1 V and I/O VDDQ = 1.4–1.8 V, supporting concurrent burst reads/writes in high-bandwidth networking and packet buffering applications.

For engineers reviewing the CY7C1512V18 datasheet, CY7C1512V18 pinout, CY7C1512V18 application, or CY7C1512V18 equivalent, key selection criteria include its dual-clock DDR timing (K/K and C/C), echo clocks (CQ/CQ) for simplified high-speed capture, 18-bit data width, synchronous self-timed writes, and HSTL-compatible I/O with ZQ impedance calibration.

Technical Context

The CY7C1512V18 implements QDR-II architecture with fully independent read and write ports sharing a multiplexed 21-bit address bus (A[20:0]). Each access delivers two 18-bit words per clock cycle-latched on alternate rising edges of K/K for address and data-and supports depth expansion via RPS/WPS and BWS[1:0] controls.

It uses a Delay Lock Loop (DLL) to align CQ/CQ echo clocks with output data edges, enabling precise source-synchronous capture at 500 MT/s. All synchronous inputs are registered on K/K edges; all outputs are registered on C/C edges (or K/K in single-clock mode), with DOFF allowing DLL disable for timing margin tuning.

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 option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10BG and ISSI IS61WV102418B, the CY7C1512V18 delivers 51% higher bandwidth and built-in source-synchronous timing aids (CQ/CQ, DLL), making it uniquely suited for 10G+ packet processing where deterministic sub-nanosecond timing is mandatory.

Availability

CY7C1512V18 is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, baseband processing buffers, and high-speed test equipment requiring stable component supply across extended production lifecycles.

Supply support for CY7C1512V18 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 programmable analog/digital mixed-signal solutions.

The CY7C1512V18 belongs to Cypress's QDR-II SRAM product line, engineered specifically for ultra-low-latency, high-bandwidth memory subsystems in networking, telecom, and test instrumentation where concurrent read/write and precise DDR timing are essential.

FAQ

What is the minimum VDDQ voltage supported by CY7C1512V18?

The device supports VDDQ from 1.4 V to 1.8 V, with guaranteed operation across this range per the datasheet's DC characteristics table. Operation below 1.4 V is not characterized and may result in I/O timing violations or drive strength degradation. System designs must maintain VDDQ ≥ 1.4 V under all load and temperature conditions.

Can CY7C1512V18 operate without the DLL enabled?

Yes-asserting DOFF (low) disables the internal DLL, reverting to basic clock-to-output timing. However, CQ/CQ become unaligned with Q[17:0], and setup/hold margins shrink significantly. This mode is only recommended for systems with exceptionally tight board-level clock-data routing and verified timing closure at 250 MHz.

How many address bits does CY7C1512V18 require?

The CY7C1512V18 requires 21 address bits (A[20:0]) to access its full 4M × 18-bit array. These are multiplexed for both read and write operations and latched on alternate rising edges of K/K, reducing pin count while preserving full addressing capability.

Is ZQ pin mandatory for proper operation?

Yes-ZQ must be connected either to an external resistor to ground (for calibrated output impedance) 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 instability or excessive current draw.