Renesas 70V9079S7PF8

Overview

70V9079S7PF8 from Integrated Device Technology (IDT) 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 buffers and FPGA-based protocol bridging systems.

For engineers reviewing the 70V9079S7PF8 datasheet, 70V9079S7PF8 pinout, 70V9079S7PF8 application, or 70V9079S7PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing modes, dual-port depth expansion capability via CE0/CE1 control, industrial temperature support (−40°C to +85°C), and low-power standby current of 0.4mA (typ.) under CMOS-level inputs.

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 auto-increment (CNTEN = VIL), with counter state retained across chip-enable power-down events. FT/PIPE pin selects between flow-through (zero-latency output) and pipelined (one-cycle latency, faster 20ns cycle time) output modes.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), body size 14mm × 14mm × 1.4mm; all VDD pins require local 3.3V decoupling, all VSS pins must connect to solid ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C33256B-20JIN, the 70V9079S7PF8 uniquely combines pipelined timing, per-port address counters, and industrial-grade 3.3V operation - making it optimal for FPGA-integrated real-time systems requiring deterministic latency and minimal host intervention.

Availability

70V9079S7PF8 is available at Aetrix Electronics and suitable for telecom packet buffering, FPGA-based protocol translation, DSP co-processor memory, and motor drive real-time control applications requiring stable component supply across extended product lifecycles.

Supply support for 70V9079S7PF8 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

Integrated Device Technology (IDT), now part of Renesas Electronics, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The IDT70V90xx family was engineered specifically for deterministic, low-latency dual-port memory interfacing in FPGA, DSP, and real-time embedded systems - emphasizing synchronous timing integrity, power efficiency, and seamless depth/width scalability.

FAQ

What is the maximum operating frequency of the 70V9079S7PF8 in pipelined output mode?

The 70V9079S7PF8 supports up to 50MHz operation in pipelined output mode, corresponding to a 20ns maximum clock cycle time (tCYC2). This timing is guaranteed over the full industrial temperature range (−40°C to +85°C) and 3.3V ±0.3V supply, enabling reliable high-throughput data exchange between FPGAs and processors without timing margin violations.

Does the 70V9079S7PF8 support independent clock domains for left and right ports?

Yes, the 70V9079S7PF8 features fully independent CLKL and CLKR inputs, allowing asynchronous clocking of left and right ports. Each port's registers (address, data, control) are clocked only by their respective clock signal, enabling true clock-domain crossing without external synchronizers - critical for isolating real-time control logic from communication subsystems.

How does the address counter function in the 70V9079S7PF8, and what happens during chip enable power-down?

The 70V9079S7PF8 provides per-port CNTEN and CNTRST inputs to control an internal address counter that increments automatically on each clock cycle when CNTEN = VIL. The counter state is retained during chip-enable power-down (ISB3 mode), so address sequencing resumes from the last value upon reactivation - eliminating restart overhead in burst-oriented applications like packet header parsing.

What is the purpose of the dual chip enable (CE0/CE1) configuration in the 70V9079S7PF8?

The dual CE0/CE1 scheme per port in the 70V9079S7PF8 enables depth expansion without external logic: asserting CE0L = VIL and CE1L = VIH activates the left port, while CE0R = VIL and CE1R = VIH activates the right port. Cascading multiple devices uses CE1 of one device to gate CE0 of the next, simplifying memory bank decoding in systems scaling beyond 32K words.

Is the 70V9079S7PF8 pin-compatible with other members of the IDT70V90xx family, such as the 70V9089?

No, the 70V9079S7PF8 is not pin-compatible with the 70V9089. While both use 100-pin TQFP packages, the 70V9079 implements a 32K × 8 organization (A0–A14) with A15X marked NC, whereas the 70V9089 supports 64K × 8 (A0–A15). Pin functions differ - notably, A15R/A15L are No Connect on 70V9079S7PF8 but active address lines on 70V9089, requiring PCB layout revision for substitution.