Infineon Technologies CY7C09349A-12AC

Overview

CY7C09349A from Cypress Semiconductor is a 4K × 18-bit synchronous dual-port static RAM with true dual-ported architecture, pipelined/flow-through mode selection (FT/PIPE pin), 100 MHz max clock frequency in pipelined mode, and 6.5 ns clock-to-data access time (tCD2). It supports independent simultaneous read/write on left and right ports and is used in high-speed inter-processor communication and FPGA co-processor buffering.

For engineers reviewing the CY7C09349A datasheet, CY7C09349A pinout, CY7C09349A application, or CY7C09349A equivalent, key selection criteria include dual-port timing coordination, byte-selectable I/O (UBL/LBL), burst counter support (CNTEN/CNTRST), and 100-pin TQFP package compatibility with legacy memory bus layouts.

Technical Context

This device implements two fully synchronous, independently clocked ports (CLKL/CLKR) with register-controlled address, data, and control paths-enabling zero-wait-state operation at up to 100 MHz in pipelined mode. Each port features dedicated burst counters (CNTENL/CNTENR, CNTRSTL/CNTRSTR) and address strobes (ADSL/ADSR) for automatic sequential addressing.

Mode selection between flow-through (tCD1 = 15 ns) and pipelined (tCD2 = 6.5 ns) is hardware-controlled via FT/PIPE pin; output enable (OEL/OER), chip enables (CE0L/CE1L, CE0R/CE1R), and byte controls (LBL/UBL, LBR/UBR) provide granular port-level access management without external logic.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Plastic Flatpack (TQFP), 0.5 mm pitch, body size 14 mm × 14 mm, exposed thermal pad (optional).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V25L15PF and CY7C028V-25AC, CY7C09349A uniquely delivers 4K×18 capacity, 5 V operation, pipelined 6.5 ns access, and integrated burst counters-making it irreplaceable in high-speed, byte-flexible, legacy-compatible dual-port systems.

Availability

CY7C09349A is available at Aetrix Electronics and suitable for inter-processor communication, FPGA co-processor buffering, and digital signal processing applications requiring stable component supply, long-lifecycle support, and drop-in replacement capability for legacy Cypress designs.

Supply support for CY7C09349A 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 industrial, automotive, and communications systems.

The CY7C093xx family targets high-speed deterministic data exchange between heterogeneous processors and logic fabrics, emphasizing low-latency dual-port access, flexible timing modes, and robust 5 V interoperability.

FAQ

Is CY7C09349A compatible with 3.3 V logic interfaces?

No. CY7C09349A operates exclusively at 5.0 V ±10% and specifies VIH = 2.2 V, VIL = 0.8 V-designed for TTL/5 V CMOS compatibility. Direct connection to 3.3 V devices requires level-shifting circuitry on all control, address, and data lines to prevent damage and ensure valid logic thresholds.

Can both ports access the same memory location simultaneously?

Yes-true dual-port architecture permits concurrent read and write operations to the same address. However, the datasheet explicitly warns that simultaneous writes to the same location yield indeterminate final data; this behavior is inherent to the SRAM cell design and must be managed in system software or arbitration logic.

What is the function of the FT/PIPE pin, and how does it affect timing?

The FT/PIPE pin selects between pipelined (HIGH) and flow-through (LOW) output modes. In pipelined mode, data is registered, yielding tCD2 = 6.5 ns but adding one-cycle latency; in flow-through mode, data appears combinatorially after tCD1 = 15 ns with zero-cycle latency-critical for applications requiring immediate read-after-write visibility.

Does CY7C09349A support burst addressing without external logic?

Yes. Each port includes a dedicated burst counter controlled by CNTEN and CNTRST inputs. When CNTEN is asserted LOW, the counter increments on every CLK rising edge, automatically generating sequential addresses-eliminating need for external address generators in streaming applications like DMA or FIFO management.