Infineon Technologies CY7C1412BV18-167BZC

Overview

CY7C1412BV18-167BZC from Cypress Semiconductor is a 36-Mbit QDR® II SRAM with 2M × 18 organization, 167 MHz maximum operating frequency, 1.8 V core supply (VDD), 1.4–1.8 V I/O supply (VDDQ), and 165-ball FBGA package. It implements dual independent read/write ports with DDR interfaces, 2-word burst architecture, and DLL-enabled 1.5-cycle read latency - deployed in high-speed network packet buffers and switch fabric memory subsystems.

For engineers reviewing the CY7C1412BV18-167BZC datasheet, CY7C1412BV18-167BZC pinout, CY7C1412BV18-167BZC application, or CY7C1412BV18-167BZC equivalent, key selection criteria include burst timing compliance, echo clock (CQ/CQ) synchronization for data capture, HSTL-18 output drive matching, DLL on/off mode behavior, and depth expansion via RPS/WPS port selects.

Technical Context

The CY7C1412BV18-167BZC uses a synchronous pipelined QDR II architecture with physically separate read and write data paths, eliminating bus turnaround and enabling concurrent access. Its dual-clock domain employs K/K for address/data input latching and C/C for output timing, with echo clocks CQ/CQ referenced to C/C for skew-compensated data capture at 500 MT/s.

Internally organized as two 1M × 18 arrays, it supports 2-word bursts per access, 1.5-cycle read latency with DLL enabled (or 1-cycle in DLL-off mode), and byte-write select (BWS[1:0]) for selective 9-bit sub-word writes. All control signals (RPS, WPS, BWS) are registered on K/K rising edges, ensuring deterministic setup/hold timing.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body, RoHS-compliant, with 0.8 mm ball pitch and standard JEDEC MO-270AB footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT72T3615L10PA and IS61WV102418B, the CY7C1412BV18-167BZC uniquely delivers 167 MHz QDR II operation with echo clocks, ZQ calibration, and true dual-port concurrency - essential for modern packet buffer and switch fabric implementations where timing precision and bandwidth density are critical.

Availability

CY7C1412BV18-167BZC is available at Aetrix Electronics and suitable for network packet buffering, telecom line card design, and high-speed test equipment development requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for CY7C1412BV18-167BZC 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) is a fabless semiconductor company specializing in high-performance memory, microcontrollers, and programmable logic solutions for communications, industrial, and automotive markets.

The CY7C1412BV18 belongs to Cypress's QDR II SRAM product line, engineered specifically for ultra-low-latency, high-throughput memory subsystems in networking and telecommunications infrastructure where deterministic burst access and DDR timing integrity are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1412BV18-167BZC?

The DOFF (DLL Turn Off) pin is an active-low control that disables the internal Delay Lock Loop. When pulled LOW, the device operates in QDR I mode with 1-cycle read latency and reduced timing margins, supporting reliable operation up to 167 MHz without DLL calibration. In normal operation, DOFF must be tied HIGH via ≤10 kΩ pull-up to enable DLL-based 1.5-cycle latency and tighter jitter control.

How does the ZQ pin affect output driver performance?

The ZQ pin connects to an external 240 Ω resistor to ground to calibrate the output driver impedance of Q[17:0], CQ, and CQ pins to 50 Ω (0.2 × RQ). This ensures consistent signal integrity across voltage and temperature variations. Connecting ZQ directly to VDDQ enables minimum-impedance mode; leaving it unconnected or tying to GND violates specification and may cause output instability.

Can CY7C1412BV18-167BZC be used in single-clock mode?

Yes - the device supports single-clock mode where K and C are driven by the same clock source, and K and C are tied together. In this configuration, all input registers use K/K and all output registers use C/C (i.e., K/K), simplifying clock distribution at the cost of reduced skew compensation capability. Timing parameters shift accordingly, and echo clocks CQ/CQ track K/K instead of C/C.

What is the purpose of BWS[1:0] in write operations?

BWS[1:0] are active-low byte write select signals that control which 9-bit sub-word of D[17:0] is written during each half of the 2-word burst. BWS0 enables D[8:0]; BWS1 enables D[17:9]. When either is deasserted, the corresponding byte remains unchanged - enabling efficient read-modify-write sequences without full-word reads or external logic.