Infineon Technologies CY7C1292DV18-167BZC

Overview

CY7C1292DV18-167BZC from Cypress Semiconductor is a 9-Mbit QDR-II™ SRAM with 512K × 18 organization, 167 MHz maximum operating frequency, 1.8 V core supply (±0.1 V), and 1.4–1.8 V I/O supply (VDDQ). It features separate read/write ports, DDR interfaces on both ports (1000 Mbps effective data rate per port), and echo clocks (CQ/CQ) for high-speed data capture in networking and packet buffering applications.

For engineers reviewing the CY7C1292DV18-167BZC datasheet, CY7C1292DV18-167BZC pinout, CY7C1292DV18-167BZC application, or CY7C1292DV18-167BZC equivalent, this device supports concurrent read/write transactions without bus turnaround, requires precise K/K and C/C clock alignment, implements byte-write select (BWS0/BWS1), and delivers full data coherency in depth-expanded memory systems.

Technical Context

The CY7C1292DV18-167BZC implements QDR-II architecture with fully independent synchronous read and write ports sharing a multiplexed 18-bit address bus (A[17:0]). Read address latching occurs on the rising edge of K; write address latching on the rising edge of K. Both ports use double data rate transfers - two 18-bit words per access - with output timing referenced to C and C clocks.

It integrates a Delay Lock Loop (DLL) for accurate data placement, supports JTAG 1149.1 boundary scan via TDI/TDO/TCK/TMS, and enables impedance tuning via ZQ pin connected to external resistor-to-ground. The device operates in dual-clock mode by default but supports single-clock mode when C and C are strapped HIGH at power-on.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 13 mm × 15 mm × 1.4 mm body, RoHS-compliant lead-free option available.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar QDR-II SRAM applications.

Compared with IDT72T3615L167BG and IS61WV102418B-167BLI, the CY7C1292DV18-167BZC uniquely combines 1.8 V core operation, integrated DLL, echo clocks, and byte-write select - making it optimal for new 1.8 V high-speed networking designs requiring precise timing control and partial-write efficiency.

Availability

CY7C1292DV18-167BZC is available at Aetrix Electronics and suitable for network packet buffering, high-speed switch fabric memory, and telecom line card buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for CY7C1292DV18-167BZC 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.

The CY7C1292DV18 belongs to Cypress's QDR-II SRAM product line, engineered specifically for deterministic, low-latency, concurrent-access memory subsystems in packet-switched infrastructure and high-speed test equipment.

FAQ

What is the minimum VDDQ voltage supported for reliable operation?

The CY7C1292DV18-167BZC supports VDDQ from 1.4 V to 1.8 V. Operation below 1.4 V violates HSTL Class I specifications and causes output drive strength degradation and input threshold shift, risking timing violations and data corruption. Designers must maintain VDDQ ≥ 1.4 V across all operating conditions.

Can C and C be driven from the same differential clock source as K and K?

No - C and C must be generated independently from K and K to achieve optimal deskew. While they may share the same PLL source, C/C require dedicated routing with matched length and phase to Q[17:0] and CQ/CQ signals. Using K/K as C/C substitutes disables echo clock functionality and increases output timing uncertainty beyond AC specification limits.

How does DOFF affect DLL behavior and timing parameters?

Asserting DOFF (LOW) disables the internal DLL, reverting output timing to fixed delay paths. This increases clock-to-output skew to ±150 ps (vs. ±50 ps with DLL enabled) and invalidates all DLL-dependent AC parameters in the datasheet. DOFF should only be used for debug or legacy compatibility - not in production timing-critical systems.

Is ZQ pin required to be connected for functional operation?

Yes - ZQ must be connected either to an external resistor to ground (for impedance tuning) or directly to VDDQ (for minimum impedance mode). Leaving ZQ floating or tied to VSS violates the absolute maximum ratings and causes undefined output driver behavior, including excessive current draw and signal integrity failure on Q[17:0] and CQ/CQ lines.