Renesas 70V9279L7PRFG8

Overview

70V9279L7PRFG8 from IDT (now part of Renesas) is a high-speed, 32K x 16-bit synchronous dual-port SRAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports. It operates at 3.3V ±0.3V, supports pipelined output mode with 10ns cycle time (100MHz), and delivers 6.5ns clock-to-data-out in pipelined mode. It is used in real-time inter-processor communication, network packet buffering, and FPGA co-processor data exchange.

For engineers reviewing the 70V9279L7PRFG8 datasheet, 70V9279L7PRFG8 pinout, 70V9279L7PRFG8 application, or 70V9279L7PRFG8 equivalent, this page provides verified functional identity, industrial-grade timing specs (–40°C to +85°C), package mapping to 128-pin TQFP, confirmed dual-port synchronous operation, and validated alternatives for depth expansion or power-optimized replacement.

Technical Context

This device implements fully synchronous dual-port architecture with independent clock, control, and data registers on both ports - enabling 4ns setup and 1ns hold times for all inputs. It supports two output modes: flow-through (max 20ns tCD1) and pipelined (max 9ns tCD2), selected per port via FT/PIPE pins.

The memory includes address counter logic with independent CNTEN/CNTRST per port, separate upper- and lower-byte controls (UBL/LBL, UBR/LBR), and dual chip enables (CE0/CE1) for seamless depth expansion. Power management features include four standby current states (ISB1–ISB4), with full CMOS-level standby drawing only 0.4mA typ.

Key Specifications

Pinout & Package

70V9279L7PRFG8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package with exposed thermal pad (not electrically connected). All VDD pins must be decoupled locally; all VSS pins require low-inductance ground connections. Pin 1 is marked by a dot or notch orientation indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1371DV33-100AXC and AS7C33256PFSI-10BIN, the 70V9279L7PRFG8 uniquely combines per-port address counters, dual-mode output selection (flow-through/pipelined), and industrial temperature support in a 128-pin footprint - making it optimal for deterministic, low-software-overhead dual-processor interfaces.

Availability

70V9279L7PRFG8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for 70V9279L7PRFG8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V9279L7PRFG8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V9279L7PRFG8 in pipelined mode?

The 70V9279L7PRFG8 supports a maximum clock frequency of 100 MHz in pipelined output mode, corresponding to a 10 ns clock cycle time (tCYC2). This is validated across the full industrial temperature range (–40°C to +85°C) and 3.3V ±0.3V supply. The device achieves 6.5 ns clock-to-data-out (tCD2) under these conditions, enabling tight-tolerance timing in high-throughput systems.

Does the 70V9279L7PRFG8 support independent address counters on both ports?

Yes, the 70V9279L7PRFG8 provides fully independent address counter logic on both left and right ports, controlled by dedicated CNTENL/CNTRSTL and CNTENR/CNTRSTR pins. Each counter advances on the rising edge of its respective clock when CNTEN = VIL, regardless of chip enable or byte select states - enabling autonomous FIFO-style operation without CPU intervention.

What is the standby current consumption of the 70V9279L7PRFG8 under full CMOS-level disable?

In full standby mode (ISB3), where both ports have CE0/CE1 driven to CMOS-high levels (> VDD – 0.2V) and all inputs held static, the 70V9279L7PRFG8 draws only 0.4 mA typical (5 mA max) at VDD = 3.3V and TA = 25°C. This ultra-low quiescent current is critical for battery-backed industrial controllers and always-on avionics modules.

Can the 70V9279L7PRFG8 be used for depth expansion without additional logic gates?

Yes, the 70V9279L7PRFG8 integrates dual chip enables (CE0X and CE1X) per port, allowing direct depth expansion to 64K × 16 or larger configurations using only wire-OR logic or simple gate fanout. When CE0X = VIL and CE1X = VIH, the port is selected; mismatched CE states place the port in power-down - eliminating need for external address decoders or enable logic.

Is the 70V9279L7PRFG8 pin-compatible with earlier IDT dual-port SRAMs like the 70V9269?

No, the 70V9279L7PRFG8 is not pin-compatible with the 70V9269. While both are 128-pin TQFP dual-port SRAMs, the 70V9269 has NC (no-connect) on A14L/A14R, whereas the 70V9279L7PRFG8 uses A14L/A14R as valid address lines for its 32K × 16 configuration. Pin mappings for ADS, CNTEN, and CNTRST also differ - PCB redesign is required for migration.