Cypress Semiconductor Corp CY7C1414BV18-200BZI

Overview

CY7C1414BV18-200BZI from Cypress Semiconductor is a 1M × 36-bit, 36-Mbit QDR® II SRAM with synchronous pipelined architecture, dual independent read/write ports, 200 MHz operation (500 MT/s DDR), 1.5-cycle read latency (DLL enabled), and HSTL I/O interface. It delivers high-bandwidth buffering for network packet processing in telecom line cards.

For engineers reviewing the CY7C1414BV18-200BZI datasheet, CY7C1414BV18-200BZI pinout, CY7C1414BV18-200BZI application, or CY7C1414BV18-200BZI equivalent, key selection criteria include burst depth (2-word), DLL-enabled timing mode, x36 data width, FBGA-165 package compatibility, and QDR II–specific echo clock (CQ/CQ) synchronization requirements.

Technical Context

This device implements true dual-port QDR II architecture: separate K/K clocks latch write addresses and data, while C/C clocks drive read outputs with echo clocks CQ/CQ referenced to output clocks for precise deskew. All inputs are registered on rising edges of K or K; all outputs are edge-aligned to C or C.

It supports both DLL-on (1.5-cycle read latency, up to 250 MHz) and DLL-off (1-cycle latency, QDR I mode, ≤167 MHz) operation via DOFF pin control. Internal organization is two 512K × 36 arrays, accessed via 19-bit multiplexed address bus (A[18:0]), with byte write select (BWS[3:0]) enabling partial-word writes without read-modify-write overhead.

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-bandwidth synchronous SRAM applications.

Compared with AS7C33618B-200BIN and IS61WV102436B-200TQLI, CY7C1414BV18-200BZI uniquely combines DLL configurability (via DOFF), JTAG testability, ZQ impedance tuning, and FBGA packaging optimized for 500 MT/s signal integrity-making it preferred for telecom infrastructure upgrades requiring field-programmable timing modes.

Availability

CY7C1414BV18-200BZI is available at Aetrix Electronics and suitable for network packet buffering, telecom line card memory, and baseband processing requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.

Supply support for CY7C1414BV18-200BZI 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 connectivity solutions for industrial and communications markets.

CY7C1414BV18 belongs to the QDR II SRAM product line, designed specifically for deterministic, high-bandwidth memory interfacing in networking and telecom infrastructure where dual-port concurrency and sub-cycle latency are critical.

FAQ

What is the function of the DOFF pin on CY7C1414BV18-200BZI?

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 a maximum frequency of 167 MHz. When HIGH (typically via 10-kΩ pull-up), DLL is enabled, supporting 200 MHz operation with 1.5-cycle latency and tighter timing margins. This pin directly determines timing mode and frequency ceiling.

How does the ZQ pin affect output drive strength?

The ZQ pin connects to an external resistor (RQ) tied to ground, enabling on-die impedance calibration. The device tunes its Q[35:0] and CQ/CQ output drivers to 0.2 × RQ, matching system trace impedance for optimal signal integrity. If ZQ is tied directly to VDDQ, minimum output impedance is selected; connecting ZQ to GND or leaving it floating is prohibited and may cause functional failure.

Can CY7C1414BV18-200BZI operate with a single clock domain?

Yes. In single-clock mode, K and C are driven by the same clock source (and similarly K and C), allowing all registers to be clocked from one differential pair. This simplifies clock distribution but reduces flexibility in deskewing-echo clocks CQ/CQ remain referenced to C/C, so timing margin analysis must account for combined clock-to-out and clock-to-CQ delays under this configuration.

What is the purpose of BWS[3:0] in x36 configuration?

BWS[3:0] are four independent active-low byte write select signals, each controlling a 9-bit lane of the 36-bit data bus (BWS0: D[8:0], BWS1: D[17:9], BWS2: D[26:18], BWS3: D[35:27]). They allow partial-word writes without requiring a prior read-modify-write cycle-critical for efficient header updates in packet processing where only specific fields change per frame.