Renesas 70V9179L9PF8

Overview

70V9179L9PF8 from Renesas Electronics is a high-speed, 32K × 9-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address on left and right ports. It operates at 3.3 V ±0.3 V, supports pipelined (12 ns cycle, 83 MHz) and flow-through output modes, and features dual chip enables for depth expansion-used in real-time DSP co-processing, network packet buffering, and FPGA-based protocol accelerators.

For engineers reviewing the 70V9179L9PF8 datasheet, 70V9179L9PF8 pinout, 70V9179L9PF8 application, or 70V9179L9PF8 equivalent, key selection criteria include synchronous dual-port timing (tCD2 ≤ 9 ns), industrial temperature support (−40°C to +85°C), 100-pin TQFP package compatibility, and integrated address counter with ADS/CNTEN/CNTRST control.

Technical Context

The 70V9179L9PF8 implements fully synchronous operation on both ports with 4 ns setup / 0 ns hold on all inputs, using edge-triggered registers for address, data, and control signals. Its self-timed write architecture enables fast cycle time independent of clock low time, while dual CE0/CE1 logic allows per-port power-down without external gating.

It supports two configurable output modes via FT/PIPE pins: pipelined mode delivers 7.5 ns clock-to-data (tCD2) with 1-cycle latency and 12 ns minimum cycle time; flow-through mode provides asynchronous-like output enable response (tOE ≤ 12 ns) but requires tCD1 ≤ 20 ns. Address counter operation is decoupled from external address bus via ADS strobe and CNTEN/CNTRST controls.

Key Specifications

Pinout & Package

70V9179L9PF8 is housed in a 100-pin TQFP (PNG100) package with 0.5 mm pitch, 14 mm × 14 mm footprint, and 1.4 mm maximum height. Pin 1 is located at top-left corner (notch-marked side), with VDD and VSS distributed across multiple pins for low-impedance power delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1375D-100AXC and AS7C33256PFS-12BIN, the 70V9179L9PF8 uniquely combines industrial-grade 32K × 9 dual-port operation, integrated address counter, and pipelined timing in a compact 100-pin TQFP-making it optimal for real-time embedded systems requiring deterministic latency and minimal external logic.

Availability

70V9179L9PF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, FPGA co-processing, and real-time DSP applications requiring stable component supply across extended product lifecycles.

Supply support for 70V9179L9PF8 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

Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and memory solutions for automotive, industrial, and enterprise applications.

The 70V9179L9PF8 belongs to Renesas' legacy IDT dual-port SRAM product line, engineered specifically for deterministic, low-latency memory interfacing in real-time embedded systems with strict timing and reliability requirements.

FAQ

What is the maximum operating frequency of the 70V9179L9PF8 in pipelined output mode?

The 70V9179L9PF8 supports up to 83 MHz operation in pipelined output mode, derived from its 12 ns minimum clock cycle time (tCYC2). This frequency is guaranteed across the industrial temperature range (−40°C to +85°C) and 3.3 V ±0.3 V supply, with tCD2 ≤ 9 ns ensuring predictable read latency for time-critical applications.

Does the 70V9179L9PF8 support true simultaneous read and write to the same memory location?

Yes, the 70V9179L9PF8 uses true dual-ported memory cells that allow concurrent read and write operations to the identical address on left and right ports. This capability is fundamental to its use in lock-free inter-processor communication and real-time buffering-no arbitration or collision handling is required by the system designer.

How does the address counter function on the 70V9179L9PF8, and what signals control it?

The 70V9179L9PF8 integrates a per-port address counter controlled by CNTEN (enable), CNTRST (reset), and ADS (address strobe). When ADS = VIL and CNTEN = VIL on the rising CLK edge, the counter advances automatically; CNTRST = VIL resets it to address 0. This eliminates external counter logic in sequential-access applications like DMA buffers or FIFOs.

What power-saving modes are available on the 70V9179L9PF8, and how are they activated?

The 70V9179L9PF8 offers multiple power-saving modes: full standby (ISB3 ≤ 0.4 mA) is activated when both CE0 and CE1 are held at CMOS high/low thresholds (e.g., CE0 > VDD − 0.2 V and CE1 < 0.2 V); per-port standby (ISB2 ≤ 190 mA) occurs when one port's CE0 = VIL and CE1 = VIH while the other is deselected. These modes require no additional control logic.

Is the 70V9179L9PF8 pin-compatible with other speed grades in the same family, such as the 70V9179L7PF8 or 70V9179L12PF8?

Yes, the 70V9179L9PF8 is pin-compatible with other speed grades in the 70V9179L family-including 70V9179L7PF8 (7 ns) and 70V9179L12PF8 (12 ns)-all share identical 100-pin TQFP (PNG100) packaging, pinout, and electrical interface. Speed grade selection affects only AC timing parameters; no PCB redesign is needed when upgrading or downgrading within the family.