Cypress Semiconductor Corp CY7C1512AV18-167BZXC

Overview

CY7C1512AV18-167BZXC from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with independent read/write ports, 167 MHz maximum operating frequency, 1.5-cycle read latency (DLL enabled), and HSTL I/O interface. It delivers concurrent high-bandwidth data access for network packet buffering in telecom line cards.

For engineers reviewing the CY7C1512AV18-167BZXC datasheet, CY7C1512AV18-167BZXC pinout, CY7C1512AV18-167BZXC application, or CY7C1512AV18-167BZXC equivalent, key selection criteria include burst depth (2-word), DLL-enabled timing mode, FBGA-165 package compatibility, and dual-clock DDR interface support for deterministic data capture.

Technical Context

The device implements a synchronous pipelined architecture with physically separate read and write data paths, eliminating bus turnaround overhead. It uses two independent clock domains: K/K for address/data input registration and C/C for output data timing, with echo clocks CQ/CQ referenced to C/C for precise source-synchronous capture.

Internally organized as two 2M × 18 arrays, it supports depth expansion via RPS/WPS controls and byte-write masking via BWS[1:0]. The DLL enables accurate 1.5-cycle read latency at 167 MHz; disabling DLL (via DOFF = LOW) reverts operation to QDR I mode with 1-cycle latency and reduced max frequency.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, 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 AS7C361024B-167BIN and IS61WV102418BLL-167TQLI, CY7C1512AV18-167BZXC uniquely delivers concurrent dual-port DDR bursts with DLL-calibrated timing and echo clocks-enabling deterministic 167 MHz operation in telecom and networking systems where bus turnaround and skew limit performance.

Availability

CY7C1512AV18-167BZXC is available at Aetrix Electronics and suitable for network packet buffering, switch fabric interface, and telecom line card memory requiring stable component supply across extended temperature and long production lifecycles.

Supply support for CY7C1512AV18-167BZXC 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.

CY7C1512AV18 belongs to the QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent memory access in packet-switched infrastructure equipment.

FAQ

What is the function of the DOFF pin?

The DOFF pin disables the internal Delay Lock Loop when pulled LOW. In this state, the device operates in QDR I mode with 1-cycle read latency and reduced maximum frequency (≤167 MHz). For QDR II timing with 1.5-cycle latency, DOFF must be tied HIGH via a ≤10 kΩ pull-up resistor to VDDQ.

How does the ZQ pin affect output drive strength?

ZQ calibrates the output impedance of Q[17:0], CQ, and CQ to match the system data bus. Connecting ZQ to a resistor (RQ) to ground sets output impedance to 0.2 × RQ. For minimum impedance (maximum drive), connect ZQ directly to VDDQ. ZQ must never be left floating or tied to GND.

Can CY7C1512AV18-167BZXC operate with a single clock domain?

Yes - it supports single-clock mode using only K/K to control both input and output registers. In this mode, C/C are unused, and Q[17:0] are clocked by K/K. However, echo clocks CQ/CQ remain active and referenced to K/K, preserving source-synchronous capture capability.

What is the purpose of BWS[1:0] in CY7C1512AV18-167BZXC?

BWS0 and BWS1 are active-low byte write select signals that control which 9-bit nibble of D[17:0] is written during each 18-bit data transfer. BWS0 governs D[8:0], BWS1 governs D[17:9]. Deasserting either signal preserves the corresponding byte in memory, enabling efficient read-modify-write operations without full-word reads.