Infineon Technologies CY7C1412AV18-167BZXI

Overview

CY7C1412AV18-167BZXI from Cypress Semiconductor is a 36-Mbit QDR-II™ SRAM with 2M × 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 (effectively 334 MT/s), and echo clocks (CQ/CQ) for high-speed data capture in networking packet buffers and switch fabric memory.

For engineers reviewing the CY7C1412AV18-167BZXI datasheet, CY7C1412AV18-167BZXI pinout, CY7C1412AV18-167BZXI application, or CY7C1412AV18-167BZXI equivalent, key selection criteria include burst depth (2-word), port independence (RPS/WPS control), HSTL-18-compatible variable-drive outputs, DLL-enabled timing accuracy, and 165-ball FBGA (15 × 17 × 1.4 mm) package compatibility with high-density routing.

Technical Context

The CY7C1412AV18-167BZXI implements true dual-port synchronous pipelined architecture: Read address latched on K rising edge, Write address on K rising edge, with independent RPS and WPS controls enabling concurrent access. Its 2M × 18 array is internally split into two 1M × 18 banks, accessed via 20-bit multiplexed address bus (A[19:0]).

All data transfers occur in fixed 2-word bursts - each read or write accesses two consecutive 18-bit words in one clock cycle. Output data is registered to C/C clocks (or K/K in single-clock mode), while echo clocks CQ/CQ are phase-aligned to C/C to simplify source-synchronous capture at the controller, eliminating flight-time skew across wide buses.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant lead-free finish (BZXI suffix).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1412AV18-200BZXI, the -167BZXI trades peak bandwidth for lower power and relaxed timing closure; versus AS7C33618B-167BIN, it delivers superior signal integrity at 1.8 V with calibrated outputs and DLL-assisted timing - critical for >150 MHz systems.

Availability

CY7C1412AV18-167BZXI is available at Aetrix Electronics and suitable for networking switch fabric, telecom baseband processing, high-speed test equipment, and real-time video frame buffering requiring stable component supply across extended product lifecycles.

Supply support for CY7C1412AV18-167BZXI 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 mixed-signal ICs for demanding communications and industrial applications, emphasizing signal integrity, timing precision, and long-term reliability.

The QDR-II SRAM product line targets high-bandwidth, low-latency memory subsystems in networking, test, and telecom infrastructure - specifically engineered to replace asynchronous SRAMs and simplify DDR-based buffer design with deterministic dual-port access.

FAQ

What is the function of the ZQ pin on CY7C1412AV18-167BZXI?

The ZQ pin is an output impedance calibration input that connects to an external resistor (RQ) tied to ground. The device uses this connection to tune its Q[17:0], CQ, and CQ output drivers to 0.2×RQ, ensuring precise impedance matching to the PCB data bus. It must never be left floating or tied directly to GND.

Can CY7C1412AV18-167BZXI operate in single-clock mode?

Yes - the device supports single-clock mode where K and K are tied together, and C and C are tied together. In this configuration, K serves as both address/control clock and output data clock, simplifying system clocking at the cost of reduced deskew capability compared to differential clocking.

How does the 2-word burst architecture affect memory access timing?

Each read or write access automatically retrieves or stores two consecutive 18-bit words in a single clock cycle, with the second word appearing on the next rising edge of the respective clock. This eliminates the need for external burst counters and guarantees predictable, fixed-latency transfers essential for pipeline synchronization.

What happens when DOFF is pulled LOW?

Pulling DOFF LOW disables the internal Delay Lock Loop (DLL), causing output timing parameters (e.g., tAC, tQH) to shift outside datasheet specifications. This mode is intended only for specific debug or low-power scenarios and invalidates guaranteed timing performance at 167 MHz.