Renesas 70V9079L7PFG

Overview

70V9079L7PFG from IDT (now Renesas) is a high-speed 32K × 8-bit synchronous dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 3.3V, supports pipelined (12 ns cycle, 83 MHz) and flow-through (30 ns cycle) output modes, and features integrated address counters with reset/enable control - used in real-time DSP inter-processor communication buffers and FPGA co-processor data exchange.

For engineers reviewing the 70V9079L7PFG datasheet, 70V9079L7PFG pinout, 70V9079L7PFG application, or 70V9079L7PFG equivalent, key selection criteria include synchronous dual-port timing compliance (tCD2 ≤ 12 ns), industrial temperature support (–40°C to +85°C), TQFP-100 package footprint, and LVTTL-compatible 3.3V I/O with low standby power (1.32 mW typ).

Technical Context

This device implements fully synchronous operation on both ports: all inputs (address, data, control) are registered on the rising edge of CLK, with 4 ns setup / 1 ns hold timing. Its self-timed write architecture decouples internal write pulse generation from clock edge timing, enabling minimal cycle time without external wait-state logic.

The dual-port memory array supports independent address strobe (ADS) and counter enable (CNTEN) per port, allowing flexible burst addressing - either external address loading or auto-incremented internal counter mode. FT/PIPE pin selects between flow-through (zero-latency output) and pipelined (one-cycle latency, higher throughput) data paths, with CE0/CE1 enabling per-port power-down.

Key Specifications

Pinout & Package

70V9079L7PFG is housed in a 100-pin TQFP (Pb-free, RoHS-compliant) with 0.5 mm lead pitch and 14 mm × 14 mm body size. Pin 1 is marked by a corner cut; VDD (pins 25, 50, 75, 100) and VSS (pins 26, 51, 76, 1) require local decoupling. A15R and A15L are No Connect (NC) 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-25AXC and AS7C33256B-20JIN, the 70V9079L7PFG uniquely combines 32K×8 synchronous dual-port operation, integrated address counter, industrial temperature range, and 1.32 mW standby - making it optimal for resource-constrained, timing-critical embedded systems requiring deterministic latency and low power.

Availability

70V9079L7PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, aerospace avionics, and medical imaging systems requiring stable component supply, long-term lifecycle support, and guaranteed industrial-grade performance.

Supply support for 70V9079L7PFG 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 70V9079L7PFG belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where concurrent access and precise timing control are mandatory.

FAQ

What is the maximum operating frequency of the 70V9079L7PFG in pipelined mode?

The 70V9079L7PFG supports up to 50 MHz in pipelined output mode (FT/PIPE = VIH) under industrial conditions (–40°C to +85°C), based on its 20 ns minimum clock cycle time (tCYC2). At 25°C, it achieves 83 MHz (12 ns cycle), but system design must use the industrial-spec 20 ns limit for guaranteed operation across temperature.

Does the 70V9079L7PFG support true simultaneous read and write to the same memory address?

Yes, the 70V9079L7PFG uses true dual-port SRAM cells that allow independent, concurrent read and write operations to the exact same memory location - one port reading while the other writes - with no bus contention or arbitration overhead. This is confirmed in the Functional Block Diagram and Truth Table I.

How does the address counter function in the 70V9079L7PFG, and what pins control it?

The 70V9079L7PFG integrates a 15-bit address counter per port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When ADS is deasserted (VIH) and CNTEN is asserted (VIL), the counter auto-increments on each CLK rising edge. CNTRST resets the counter to address 0. This eliminates external counter logic in burst-mode applications.

What is the standby power consumption of the 70V9079L7PFG, and how is it achieved?

The 70V9079L7PFG achieves 1.32 mW typical standby power (ISB3) by disabling both ports via CMOS-level chip enables (CE0/CE1 > VDD – 0.2 V). This places all internal circuitry - including registers and memory array - into deep-sleep mode, verified across the full industrial temperature range.

Is the 70V9079L7PFG pin-compatible with other members of the IDT70V9089/79 family?

Yes, the 70V9079L7PFG shares identical pinout and package (100-pin TQFP) with IDT70V9089L7PFG and IDT70V9079S7PFG. Differences are limited to internal configuration (32K vs. 64K depth) and power grade (L = low-power, S = standard), with A15 pins designated NC on all 70V9079 variants per datasheet Note 1.