Renesas 70V9079S6PF

Overview

70V9079S6PF from IDT (now Renesas) is a high-speed 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports, 12ns max clock-to-data access in pipelined mode, LVTTL-compatible 3.3V ±0.3V operation, and integrated address counter with enable/reset-used in real-time DSP co-processing and FPGA-based protocol bridging where deterministic latency and concurrent port arbitration are critical.

For engineers reviewing the 70V9079S6PF datasheet, 70V9079S6PF pinout, 70V9079S6PF application, or 70V9079S6PF equivalent, key selection criteria include pipelined vs. flow-through output timing (tCD2 = 7.5ns typ.), dual chip-enable depth expansion capability, counter-controlled burst addressing, and industrial-grade (-40°C to +85°C) operation with 1.32mW standby power.

Technical Context

This device implements fully synchronous dual-port architecture with independent clocked registers on all address, data, and control inputs (4ns setup / 1ns hold), supporting concurrent left/right port operations without arbitration logic. Its self-timed write pulse decouples internal write completion from clock edge timing, enabling minimal cycle time.

The integrated address counter operates independently per port via CNTEN/CNTRST signals and supports both external address loading (ADS = VIL) and automatic increment (CNTEN = VIL), with pipelined or flow-through output modes selected by FT/PIPE pin-critical for burst-mode FIFO emulation and ping-pong buffer applications.

Key Specifications

Pinout & Package

70V9079S6PF is housed in a 100-pin Thin Quad Flatpack (TQFP) package, body size 14mm × 14mm × 1.4mm, with exposed thermal pad (not electrically connected). All VDD pins must be decoupled locally; all GND pins require low-inductance grounding. A15R and A15L are no-connect (NC) pins per datasheet Note 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and AS7C33256B-12JIN, the 70V9079S6PF uniquely delivers 3.3V-synchronous dual-port operation with integrated counter and pipelined timing-enabling direct FPGA/DSP interfacing without glue logic or voltage translation, while maintaining industrial temperature reliability and ultra-low standby power.

Availability

70V9079S6PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and embedded DSP co-processing applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V9079S6PF 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

IDT (Integrated Device Technology), now part of Renesas Electronics, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V9079S6PF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic latency, concurrent port access, and low-power operation in harsh thermal environments.

FAQ

What is the maximum operating frequency of the 70V9079S6PF in pipelined mode?

The 70V9079S6PF supports up to 83MHz operation in pipelined output mode, corresponding to a 12ns clock cycle time (tCYC2). This is validated across the full industrial temperature range (-40°C to +85°C) with 3.3V ±0.3V supply. The device achieves this using registered inputs with 4ns setup/1ns hold timing and a self-timed internal write pulse that decouples write completion from clock edge alignment.

Does the 70V9079S6PF support true simultaneous read/write to the same memory location?

Yes, the 70V9079S6PF implements true dual-ported SRAM cells that allow simultaneous read from one port and write to the same address on the other port-without conflict or arbitration delay. This is confirmed in the Functional Block Diagram and Description section, which states "Dual-Port memory cells to allow simultaneous access of any address from both ports." The architecture guarantees atomicity and determinism for real-time inter-processor communication.

How does the address counter function on the 70V9079S6PF, and what signals control it?

The 70V9079S6PF features independent address counters on left and right ports, controlled by CNTENL/CNTRSTL and CNTENR/CNTRSTR. When CNTEN = VIL on the rising clock edge, the counter advances regardless of CE or OE state. CNTRST = VIL resets the counter to address 0. ADS = VIL loads external address; ADS = VIH enables counter-generated addressing-allowing burst transfers without external address sequencing logic.

What is the purpose of the dual chip enable (CE0/CE1) per port on the 70V9079S6PF?

The dual chip enable (CE0X and CE1X) per port enables flexible depth expansion without external decoding logic. For example, CE0L = VIL and CE1L = VIH activates the left port; asserting CE0R = VIL and CE1R = VIH activates the right port. In multi-device configurations, higher-order address bits can directly drive CE pairs to select banks-reducing PCB area and signal integrity risk compared to traditional single-CE schemes.

Is the 70V9079S6PF pin-compatible with the 70V9089S6PF, and what is the key difference between them?

No, the 70V9079S6PF is not pin-compatible with the 70V9089S6PF. While both share the same 100-pin TQFP package and core functionality, the 70V9079S6PF implements a 32K × 8 memory array (A0–A14), whereas the 70V9089S6PF implements 64K × 8 (A0–A15). Per datasheet Note 1, A15R and A15L are NC on the 70V9079S6PF but functional address lines on the 70V9089S6PF-making them functionally distinct parts with different pin assignments for A15.