Infineon Technologies CY7C1570V18-375BZXC

Overview

CY7C1570V18 from Cypress Semiconductor is a 72-Mbit synchronous pipelined SRAM with DDR-II+ architecture, configured as 2M × 36 bits and operating at 375 MHz (2.5-cycle read latency). It features dual-edge DDR data transfer at 750 Mbps per pin, HSTL I/O with programmable drive strength, and integrated echo clocks (CQ/CQ) for precise high-speed data capture in memory subsystems. Used in network packet buffers and FPGA co-processor caches requiring deterministic low-latency burst access.

For engineers reviewing the CY7C1570V18 datasheet, CY7C1570V18 pinout, CY7C1570V18 application, or CY7C1570V18 equivalent, key selection criteria include its 2M × 36 organization, 165-ball FBGA package, 1.8V core / 1.4–1.8V I/O supply range, DLL-enabled timing alignment, and JTAG 1149.1 test port support for production validation.

Technical Context

The device implements a synchronous pipelined architecture where all address, control, and data signals are registered on rising edges of complementary K/K clocks. Read and write operations execute as 2-word bursts, with internal address decoding across two 1M × 36 arrays.

It integrates a Delay Lock Loop (DLL) to align CQ/CQ echo clocks with K/K for zero-skew data capture, supports nibble/byte write masking via BWS[3:0], and uses ZQ calibration to match output impedance to system bus termination (0.2 × R_Q).

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body height, RoHS-compliant Pb-free option available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1568V18, CY7C1570V18 delivers double data width at identical speed and latency-critical for 32+ bit processor buses-while AS7C3256A-15JCIN lacks all DDR-II+ timing features and cannot support burst or echo-clock–based capture.

Availability

CY7C1570V18 is available at Aetrix Electronics and suitable for network packet buffers, FPGA co-processor caches, and telecom line card memory requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for CY7C1570V18 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.

CY7C1570V18 belongs to the DDR-II+ SRAM product line, engineered specifically for deterministic, high-bandwidth memory interfacing in FPGA- and ASIC-based infrastructure equipment where DDR timing precision and burst efficiency are mandatory.

FAQ

What is the function of the DOFF pin on CY7C1570V18?

The DOFF (DLL Turn Off) pin is an active-low input that disables the internal Delay Lock Loop when pulled to ground. In this mode, the device operates with DDR-I timing specifications and supports maximum frequencies up to 167 MHz. For full DDR-II+ performance at 375 MHz, DOFF must be pulled up via a ≤10 kΩ resistor to VDDQ.

How does the ZQ pin affect output drive strength?

The ZQ pin connects to an external resistor (R_Q) tied to ground, enabling on-die calibration of CQ, CQ, and DQ[35:0] output driver impedance to precisely 0.2 × R_Q. This ensures consistent signal integrity across voltage and temperature variations. If ZQ is tied directly to VDDQ, the device enters minimum-impedance mode instead of calibrated mode.

Can CY7C1570V18 operate with VDDQ = 1.5V?

Yes. The device supports VDDQ from 1.4 V to VDD (1.8 V), including 1.5 V. At 1.5 V, it maintains full 375 MHz operation and complies with HSTL Class I specifications. System designers must ensure VDDQ decoupling meets transient current demands during 750 MT/s DDR transitions.

What is the role of QVLD in system timing design?

QVLD is an edge-aligned output validity signal synchronized to CQ/CQ, indicating when DQ[35:0] data is stable and ready for sampling. It eliminates reliance on fixed setup/hold margins, allowing system logic to latch data on the same clock edge as QVLD assertion-critical for achieving timing closure in multi-Gbps memory interfaces.