Renesas 70V9279L7PRFGI8

Overview

70V9279L7PRFGI8 from IDT (now 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 (10 ns cycle, 100 MHz) and flow-through output modes, and features industrial temperature range (–40°C to +85°C), making it suitable for real-time inter-processor communication in telecom line cards and packet buffering systems.

For engineers reviewing the 70V9279L7PRFGI8 datasheet, 70V9279L7PRFGI8 pinout, 70V9279L7PRFGI8 application, or 70V9279L7PRFGI8 equivalent, key selection criteria include its dual-clock synchronous operation, 128-pin TQFP package, 10 ns pipelined cycle time, separate upper/lower byte controls, and counter-enable/reset functionality for burst-mode address sequencing.

Technical Context

This device implements fully synchronous dual-port architecture with independent clock inputs (CLKL/CLKR), data input registers, and address strobe (ADSL/ADSR) for precise timing control. Both ports support identical setup/hold requirements (4 ns setup, 1 ns hold) and register-controlled inputs for minimal timing latitude.

It provides two configurable output modes via FT/PIPE pins: pipelined (6.5 ns clock-to-data, 10 ns cycle) for high-throughput streaming, and flow-through (7.5 ns max access) for low-latency deterministic reads. The integrated address counter-enabled by CNTEN and reset by CNTRST-supports auto-incrementing sequential access without external logic.

Key Specifications

Pinout & Package

70V9279L7PRFGI8 is housed in a 128-pin TQFP package (JEDEC MO-220, body size 14 mm × 20 mm × 1.4 mm). All VDD pins require local 3.3V decoupling; all VSS pins must be connected to ground. Pin numbering follows standard top-view orientation with pin 1 marked by corner notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and AS7C33256P-15JIN, the 70V9279L7PRFGI8 uniquely combines 100 MHz pipelined throughput, integrated address counter, TQFP packaging, and industrial temperature support - delivering balanced performance, integration, and manufacturability for real-time embedded systems.

Availability

70V9279L7PRFGI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, and broadcast video equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for 70V9279L7PRFGI8 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 (formerly IDT) is a global semiconductor leader specializing in microcontrollers, analog, and memory solutions for automotive, industrial, and communications markets.

The 70V9279L7PRFGI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication and real-time buffering in multi-clock-domain systems.

FAQ

What is the maximum operating frequency of the 70V9279L7PRFGI8 in pipelined mode?

The 70V9279L7PRFGI8 achieves a 10 ns clock cycle time in pipelined output mode, supporting up to 100 MHz operation. This is confirmed in the AC Electrical Characteristics table (Table 11a) for the X7 speed grade, which matches the "L7" suffix in 70V9279L7PRFGI8. Performance remains stable across the full industrial temperature range (–40°C to +85°C).

Does the 70V9279L7PRFGI8 support independent configuration of pipelined and flow-through modes on left and right ports?

Yes - the 70V9279L7PRFGI8 provides dedicated FT/PIPEL and FT/PIPER pins, allowing independent selection of pipelined (FT/PIPE = VIH) or flow-through (FT/PIPE = VIL) output behavior per port. This enables asymmetric timing configurations, such as pipelined writes on the left port and flow-through reads on the right port, as documented in Table 11a timing notes.

How does the address counter function in the 70V9279L7PRFGI8, and what signals control it?

The 70V9279L7PRFGI8 integrates a hardware address counter per port, controlled by CNTENL/CNTENR (enable) and CNTRSTL/CNTRSTR (reset) pins. When CNTEN = VIL on the rising clock edge, the counter advances regardless of CE or OE state. CNTRST asynchronously resets the counter to address 0. ADS input determines whether external or counter-generated addresses are used, as shown in Truth Table III.

What is the power consumption profile of the 70V9279L7PRFGI8 during active and standby operation?

The 70V9279L7PRFGI8 draws 429 mW typical active power (both ports enabled, outputs disabled, f = fMAX) and only 1.32 mW typical full standby current (ISB3) when both ports are deselected with CMOS-level inputs. These values are specified in Table 9a for the "L" power grade and verified across the industrial temperature range.

Is the 70V9279L7PRFGI8 pin-compatible with other members of the IDT70V9279/69 family, such as the 70V9269?

No - while functionally similar, the 70V9279L7PRFGI8 is not pin-compatible with the 70V9269. The datasheet explicitly states "A14X is a NC for IDT70V9269", confirming A14 is no-connect on the 70V9269 but functional on the 70V9279 for full 32K addressing. Pin configurations differ, and direct substitution would require PCB redesign.