Cypress Semiconductor Corp CY7C1512V18-200BZI

Overview

CY7C1512V18 from Cypress Semiconductor is a 4M × 18-bit (72-Mbit), 1.8V QDR-II SRAM with separate read/write ports, 250 MHz clock operation, DDR interfaces on both ports (500 MT/s effective data rate), and 165-ball FBGA (15 × 17 × 1.4 mm) packaging. It delivers concurrent read/write transactions for high-bandwidth packet buffering in network line cards.

For engineers reviewing the CY7C1512V18 datasheet, CY7C1512V18 pinout, CY7C1512V18 application, or CY7C1512V18 equivalent, key selection criteria include its dual-clock DDR timing (K/K and C/C), echo clocks (CQ/CQ) for source-synchronous capture, 18-bit burst width, HSTL I/O compatibility, and DLL-enabled precise data placement at 250 MHz.

Technical Context

The CY7C1512V18 implements QDR-II architecture with fully independent read and write ports sharing a multiplexed 21-bit address bus. Each port uses dedicated synchronous registers clocked by K/K for inputs and C/C for outputs, enabling true concurrency without bus turnaround.

It employs a Delay Lock Loop (DLL) to align internal timing with external clocks, supports variable-drive HSTL output buffers, and uses VREF-referenced input thresholds. Write operations are internally self-timed, and depth expansion is enabled via BWS[1:0] byte write selects for 18-bit data width.

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 AS7C3256B-20TIN and IS61WV102418BLL-10BLI, the CY7C1512V18 uniquely delivers 72 Mbit density with true dual-port DDR, echo clocks, and DLL-enabling deterministic 500 MT/s operation essential for packet-switched infrastructure.

Availability

CY7C1512V18 is available at Aetrix Electronics and suitable for high-speed packet buffering, network switch fabric interface, telecom baseband processing, and test equipment data capture requiring stable component supply and long-term lifecycle assurance.

Supply support for CY7C1512V18 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 networking, automotive, and industrial systems.

The QDR-II SRAM product line targets applications demanding deterministic, high-bandwidth memory access-specifically packet buffering, switch fabrics, and baseband signal processing where bus turnaround latency must be eliminated.

FAQ

What is the minimum VDDQ voltage supported for CY7C1512V18 operation?

The device supports VDDQ from 1.4 V to 1.8 V. Operation below 1.4 V violates HSTL Class I specifications and may cause output drive failure or input threshold shift. The recommended operating range is 1.4 V to VDD (1.8 V), with 1.5 V commonly used to balance power and noise margin.

Can CY7C1512V18 operate in single-clock mode using only K and K?

Yes. When C and C are tied to K and K respectively, the device operates in single-clock mode. In this configuration, Q[17:0] is driven on the rising edges of K/K, and CQ/CQ are generated relative to K/K. All timing parameters shift per Table 11 in the datasheet, and echo clock utility is reduced.

How does the ZQ pin affect output impedance calibration?

ZQ connects to an external resistor (RQ) to ground, setting output driver impedance to 0.2 × RQ for Q[17:0], CQ, and CQ. For example, a 50 Ω system bus requires RQ = 250 Ω. Connecting ZQ directly to VDDQ forces minimum impedance (~20 Ω), which may increase crosstalk in dense layouts.

Is CY7C1512V18 pin-compatible with other devices in the CY7C15xxV18 family?

No. While all share the same 165-ball FBGA footprint, pin functions differ significantly across configurations: CY7C1510V18 (x8) uses NWS[1:0], CY7C1525V18 (x9) uses BWS0 only, CY7C1514V18 (x36) uses BWS[3:0], and CY7C1512V18 (x18) uses BWS[1:0]. Address width (A[20:0]) and data width (D/Q[17:0]) also vary.