Infineon Technologies CY7C1563V18-375BZC

Overview

CY7C1563V18 from Cypress Semiconductor is a 72-Mbit QDR-II+ SRAM with 4M × 18 organization, 2.5-cycle read latency, and dual DDR interfaces operating at 400 MHz (800 MT/s effective data rate). It features separate read/write ports, echo clocks (CQ/CQ), QVLD data-valid indicator, and HSTL I/O for high-speed networking and packet buffering applications.

For engineers reviewing the CY7C1563V18 datasheet, CY7C1563V18 pinout, CY7C1563V18 application, or CY7C1563V18 equivalent, key selection criteria include burst depth (4-word), core voltage (1.8 V ± 0.1 V), I/O voltage range (1.4 V to 1.8 V), 165-ball FBGA package, and DLL-enabled timing alignment for 375 MHz operation.

Technical Context

This device implements QDR-II+ architecture with fully independent read and write ports sharing a single multiplexed address bus. Address latching occurs on alternating rising edges of K and K clocks, enabling concurrent access without bus turnaround. The internal Delay Lock Loop (DLL) aligns CQ/CQ echo clocks to K/K for precise DDR data capture at 375 MHz.

All synchronous inputs (D[17:0], A[19:0], RPS, WPS, BWS[1:0]) are registered on K or K edges; outputs (Q[17:0], QVLD) are edge-aligned with CQ/CQ. Write operations are self-timed and synchronous, while read bursts deliver four 18-bit words per access-ensuring full coherency and deterministic latency.

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, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1565V18, CY7C1563V18 offers narrower 18-bit bus and lower pin count for space-constrained layouts; compared with AS7C3256A-15JCIN, it delivers >4× bandwidth and deterministic latency but requires precise DDR timing design and DLL calibration.

Availability

CY7C1563V18 is available at Aetrix Electronics and suitable for network packet buffering, high-speed test equipment memory, telecom baseband processing, and FPGA-based protocol acceleration requiring stable component supply across production lifecycles.

Supply support for CY7C1563V18 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.

CY7C1563V18 belongs to the QDR-II+ SRAM product line, engineered specifically for deterministic, high-bandwidth memory access in packet-switched infrastructure and real-time signal processing systems.

FAQ

What is the minimum VDDQ voltage supported by CY7C1563V18?

The device supports VDDQ from 1.4 V to 1.8 V, exceeding the QDR Consortium's 1.5 V ± 0.1 V specification. Operation at 1.4 V is validated and enables compatibility with 1.5 V HSTL-15 systems while maintaining full timing compliance at 375 MHz.

How does the DOFF pin affect timing behavior?

When DOFF is pulled low, the internal DLL is disabled and the device reverts to QDR-I timing mode with maximum frequency reduced to 167 MHz. All timing parameters shift to QDR-I specifications, including longer read latency and loss of echo clock alignment - requiring complete redesign of timing constraints.

Can CY7C1563V18 be used with a single-ended clock source?

No - the architecture requires true differential K/K clock inputs. Driving K and K from the same source violates setup/hold requirements and disables proper DDR operation. A dedicated differential clock generator or FPGA clock buffer with complementary outputs is mandatory.

What is the function of the ZQ pin during system initialization?

ZQ must be connected to a 240 Ω resistor to ground before power-up to calibrate output driver impedance. This sets CQ, CQ, and Q[17:0] drive strength to match 48 Ω PCB traces. Leaving ZQ unconnected or tied to VSS causes undefined output impedance and signal integrity failure at 375 MHz.