Infineon Technologies CY7C1512AV18-167BZI

Overview

CY7C1512AV18-167BZI from Cypress Semiconductor is a 4M × 18 (72-Mbit), 1.8V QDR® II SRAM with dual independent read/write ports, 167 MHz maximum operating frequency, 1.5-cycle read latency (DLL enabled), and 165-ball FBGA (15 × 17 × 1.4 mm) package. It delivers concurrent burst transfers of two 18-bit words per access for high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C1512AV18-167BZI datasheet, CY7C1512AV18-167BZI pinout, CY7C1512AV18-167BZI application, or CY7C1512AV18-167BZI equivalent, key selection criteria include DDR read/write timing, echo clock (CQ/CQ) support for source-synchronous capture, HSTL-18 I/O compliance, DLL-enabled latency control, and depth expansion via RPS/WPS port selects.

Technical Context

This QDR II SRAM implements separate synchronous read and write data paths with fully independent address latching on K/K rising edges-eliminating bus turnaround and enabling true concurrent access. Its architecture uses dedicated input registers for D[17:0], BWS[1:0], RPS, WPS, and A[20:0], all clocked by K/K, and output registers for Q[17:0] clocked by C/C.

The device supports both dual-clock mode (K/K for inputs, C/C for outputs + echo clocks CQ/CQ) and single-clock mode (K/K only), with DLL enabled by default to achieve 1.5-cycle read latency at 167 MHz. DOFF pin disables DLL to revert to QDR I timing (1-cycle latency) and reduces max frequency to 167 MHz with relaxed setup/hold margins.

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, JEDEC MO-270AC compliant. Thermal pad exposed on underside for enhanced heat dissipation in high-throughput operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10PA and IS61WV102418B, CY7C1512AV18-167BZI uniquely provides DDR dual-port operation with echo clocks and DLL-controlled latency-enabling deterministic, skew-tolerant, full-duplex memory access essential for modern packet-processing architectures.

Availability

CY7C1512AV18-167BZI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and high-speed test equipment requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for CY7C1512AV18-167BZI 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 U.S.-based semiconductor company specializing in high-performance memory, microcontrollers, and connectivity solutions for industrial and communications markets.

CY7C1512AV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for deterministic, low-latency, concurrent memory access in packet-switched infrastructure and high-speed instrumentation.

FAQ

What is the function of the DOFF pin on CY7C1512AV18-167BZI?

The DOFF pin disables the internal Delay Lock Loop (DLL) when pulled LOW, forcing the device into QDR I mode with 1-cycle read latency and relaxed timing margins. When pulled HIGH (typically via 10 kΩ resistor to VDDQ), DLL is active, enabling 1.5-cycle latency and tighter timing at up to 167 MHz. This pin must never be left floating.

How does the ZQ pin affect output impedance calibration?

ZQ connects to an external 240 Ω resistor to ground, allowing the device to calibrate its Q[17:0] and CQ/CQ output drivers to 48 Ω (0.2 × RQ). This ensures consistent HSTL-18 signal integrity across voltage/temperature variations. Connecting ZQ directly to VDDQ enables minimum-impedance mode; connecting to GND or leaving it open is prohibited.

Can CY7C1512AV18-167BZI operate in single-clock mode?

Yes - by using only K/K as the sole clock pair and ignoring C/C, the device operates in single-clock mode. In this configuration, Q[17:0] data is clocked out on K/K edges instead of C/C, and CQ/CQ are generated relative to K/K. All timing parameters shift accordingly, and echo clock utility for deskew is lost.

What is the role of BWS[1:0] in byte-write operations?

BWS0 controls D[8:0] and BWS1 controls D[17:9]; both are sampled on K/K rising edges during write cycles. Asserting either signal writes the corresponding 9-bit byte; deasserting preserves existing memory content in that byte lane. This enables efficient read-modify-write sequences without full-word reads or external logic.