Infineon Technologies CY7C09279V-12AC

Overview

CY7C09279V-12AC from Cypress Semiconductor is a 3.3V, 32K × 16-bit synchronous dual-port SRAM with true dual-ported memory cells enabling simultaneous read/write access to the same address, pipelined output mode supporting 50 MHz operation (f_MAX2), 12 ns max clock-to-data access time (t_CD2), and 100-pin TQFP package for industrial temperature range (–40°C to +85°C). It serves in high-speed inter-processor communication buffers requiring deterministic latency and burst-addressed data streaming.

For engineers reviewing the CY7C09279V-12AC datasheet, CY7C09279V-12AC pinout, CY7C09279V-12AC application, or CY7C09279V-12AC equivalent, key selection criteria include pipelined vs. flow-through timing modes, dual-chip-enable depth expansion capability, byte-selectable I/O bus matching, and CMOS-level standby current of 10 μA.

Technical Context

This device implements two fully independent synchronous ports-left and right-each with dedicated clock (CLKL/CLKR), address (A0L–A14L / A0R–A14R), control (CE0/CE1, R/W, OE, LB/UB), and data (I/O0–I/O15) interfaces. Address strobe (ADSL/ADSR) loads burst counters, while CNTEN/CNTRST enable hardware-accelerated sequential addressing without external logic.

It supports three operational modes selected via FT/PIPE pin: pipelined (6.5–12 ns t_CD2, 50–100 MHz f_MAX2), flow-through (15–25 ns t_CD1, 33–53 MHz f_MAX1), and burst (internal counter increment on CLK edge). Dual chip enables allow seamless depth expansion across multiple devices without external address decoding.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Plastic Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm pitch, RoHS-compliant, Pb-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT70V27L12PF8, CY7C09279V-12AC delivers higher bandwidth via pipelined mode and better thermal profile in TQFP; versus CY7C09469V-12AC, it offers cost-optimized capacity for fixed 32K buffer requirements without over-provisioning.

Availability

CY7C09279V-12AC is available at Aetrix Electronics and suitable for telecom line card buffering, industrial PLC dual-CPU interfacing, medical imaging frame stores, and avionics sensor fusion buffers requiring stable component supply across extended production lifecycles.

Supply support for CY7C09279V-12AC 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 infrastructure markets.

The CY7C092xxV series targets deterministic, low-latency inter-processor communication in systems requiring concurrent access to shared memory without arbitration overhead or software intervention.

FAQ

What is the maximum operating frequency in pipelined mode for CY7C09279V-12AC?

The CY7C09279V-12AC supports up to 50 MHz in pipelined mode, corresponding to a 20 ns clock cycle time (t_CYC2). This is verified by the –12 speed grade designation and confirmed in the Switching Characteristics table on page 7 of the official datasheet (Document #: 38-06056 Rev. *C).

Can both ports access the same memory location simultaneously?

Yes - the CY7C09279V-12AC uses true dual-ported SRAM cells that permit simultaneous read and write operations to the same address. However, the datasheet explicitly states that when writing to the same location from both ports concurrently, the final stored value is indeterminate and must be avoided in system design.

Does CY7C09279V-12AC support burst addressing, and how is it configured?

Yes - each port includes a dedicated burst counter loaded via ADS (Address Strobe) and incremented on CLK edges when CNTEN is asserted. The counter automatically wraps within the 32K address space (A0–A14), enabling continuous sequential access without external address generation 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, output data is registered, yielding faster max frequency (50 MHz) but adding one clock cycle of latency. In flow-through mode, data appears combinatorially after t_CD1 = 25 ns max, eliminating latency at the cost of reduced speed (33 MHz max).