Infineon Technologies CY7C1418AV18-250BZC

Overview

CY7C1418AV18-250BZC from Cypress Semiconductor is a 36 Mbit (2M × 18) synchronous pipelined DDR II SRAM with two-word burst architecture, 250 MHz maximum operating frequency, 1.8 V core supply, and HSTL I/O compatible with 1.4–1.8 V output drive range. It delivers 600 Mbps effective data rate via double-data-rate transfers synchronized to K/K and C/C clock pairs, deployed in high-bandwidth packet buffering for telecom line cards.

For engineers reviewing the CY7C1418AV18-250BZC datasheet, CY7C1418AV18-250BZC pinout, CY7C1418AV18-250BZC application, or CY7C1418AV18-250BZC equivalent, key selection criteria include DDR II burst timing compliance, echo clock (CQ/CQ) synchronization capability, DLL-enabled data placement accuracy, and FBGA-165 package thermal/mechanical compatibility with dense PCB layouts.

Technical Context

This SRAM implements a synchronous pipelined architecture where all address, control, and data inputs are registered on rising edges of complementary K/K clocks, and all outputs are edge-aligned to C/C or K/K in single-clock mode. The internal burst counter uses A0 to generate sequential 18-bit word addresses during each access.

Read and write operations are fully synchronous and self-timed; writes use on-chip circuitry to complete without external wait states. Echo clocks CQ/CQ are free-running, phase-aligned to C/C, enabling controller-side deskewing across multiple devices without per-pin delay tuning.

Key Specifications

Pinout & Package

Package: 165-ball Fine-Pitch Ball Grid Array (FBGA), 15 mm × 17 mm × 1.4 mm body height, RoHS-compliant, 0.8 mm ball pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IS61WV102418BLL-250BLI and R1EX24016ASB-250#U0, CY7C1418AV18-250BZC uniquely combines echo clocks, DLL, and HSTL I/O in a single package-enabling robust 600 Mbps operation across multi-device memory banks without custom timing compensation.

Availability

CY7C1418AV18-250BZC is available at Aetrix Electronics and suitable for telecom line card design, network processor integration, and high-speed test equipment requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.

Supply support for CY7C1418AV18-250BZC 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, with emphasis on signal integrity and timing-critical applications.

CY7C1418AV18 belongs to Cypress's DDR II synchronous SRAM product line, engineered specifically for deterministic-latency, high-throughput buffering in packet-switched infrastructure where echo-clock synchronization and DLL-based data placement are essential.

FAQ

What is the function of the ZQ pin on CY7C1418AV18-250BZC?

The ZQ pin is an impedance calibration reference input. It must be connected to a 240 Ω resistor tied to ground to calibrate the output driver strength of DQ[17:0], CQ, and CQ pins to match 50 Ω transmission lines. Direct connection to VDDQ enables minimum impedance mode; leaving it unconnected or tying to GND violates specification and causes undefined output behavior.

Can CY7C1418AV18-250BZC operate without the DLL enabled?

Yes - the DOFF pin (pin A13) disables the DLL when pulled LOW. In DLL-off mode, timing parameters change significantly: tAC increases to 2.8 ns (vs. 1.8 ns typical with DLL), and data-to-clock alignment degrades beyond ±150 ps. This mode is intended only for validation or fallback operation; full 250 MHz performance requires DLL enabled.

How does the two-word burst architecture affect address sequencing?

The burst counter uses A0 to generate consecutive addresses: on a read or write with LD asserted, the device accesses the location specified by A[20:1], then automatically increments A0 to fetch or store the second 18-bit word from the next sequential address. No external address increment logic is required - the entire 2-word transfer completes in two C/C clock cycles.

Is CY7C1418AV18-250BZC pin-compatible with other speeds in the same family?

Yes - all CY7C1418AV18 variants (e.g., -300BZC, -278BZC, -250BZC, -200BZC) share identical 165-ball FBGA pinout, electrical interface, and command protocol. Speed grade differences reflect tested maximum frequency; lower-speed grades may operate at higher frequencies but are not guaranteed, and timing margins shrink accordingly.