Renesas 70V9279S15PRFI

Overview

70V9279S15PRFI from Integrated Device Technology (IDT) is a high-speed, 32K × 16-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from independent left and right ports. It operates at 3.3 V ±0.3 V, supports pipelined output mode with 15 ns clock-to-data access, and delivers 10 ns cycle time at 100 MHz - ideal for real-time inter-processor communication in telecom line cards and packet buffering systems.

For engineers reviewing the 70V9279S15PRFI datasheet, 70V9279S15PRFI pinout, 70V9279S15PRFI application, or 70V9279S15PRFI equivalent, key selection criteria include its industrial-grade temperature range (–40°C to +85°C), dual chip-enable architecture for seamless depth expansion, flow-through/pipelined output mode selection via FT/PIPE pin, and LVTTL-compatible 3.3 V interface with full synchronous operation on both ports.

Technical Context

The 70V9279S15PRFI implements fully synchronous dual-port operation with independent clock inputs (CLKL/CLKR), address strobe (ADSL/ADSR), and counter enable/reset (CNTENL/CNTRSTL, CNTENR/CNTRSTR) per port. Its memory array uses true dual-ported SRAM cells, allowing concurrent access without arbitration logic.

It supports two output timing modes: flow-through (tCD1 = 20 ns max) and pipelined (tCD2 = 9 ns max), selected by the FT/PIPE pin. Each port features separate upper-byte (UB/LB) and lower-byte (UBL/LBL) controls, 4 ns setup/1 ns hold timing on all synchronous inputs, and self-timed write for minimal cycle overhead.

Key Specifications

Pinout & Package

70V9279S15PRFI is housed in a 128-pin Thin Quad Flatpack (TQFP) package with exposed pad (PKG128), measuring 14 mm × 20 mm × 1.4 mm. All VDD pins must be connected to 3.3 V supply; all VSS pins require solid ground connection. 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 CY7C028V-15AXC and IDT70V27L15PF, the 70V9279S15PRFI uniquely combines 32K × 16-bit capacity, pipelined/flow-through mode flexibility, integrated address counter, and 128-pin TQFP packaging - making it optimal for new designs requiring high-bandwidth, low-latency inter-processor memory with minimal external logic.

Availability

70V9279S15PRFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle assurance, and industrial-temperature-rated memory solutions.

Supply support for 70V9279S15PRFI 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, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.

The 70V9279S15PRFI 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 where concurrent access and precise timing control are critical.

FAQ

What is the maximum operating frequency of the 70V9279S15PRFI in pipelined mode?

The 70V9279S15PRFI 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 industrial temperature range (–40°C to +85°C) and 3.3 V ±0.3 V supply, with tCD2 ≤ 9 ns clock-to-data access guaranteed. The device achieves this performance using fully registered synchronous inputs and optimized internal pipeline staging.

Does the 70V9279S15PRFI support independent timing modes on left and right ports?

Yes, the 70V9279S15PRFI supports independent output timing modes: FT/PIPEL selects mode for the left port, and FT/PIPER selects mode for the right port. Either port can operate in flow-through (FT/PIPE = VIL) or pipelined (FT/PIPE = VIH) mode simultaneously - enabling asymmetric configurations such as pipelined reads on one port and flow-through writes on the other, with no cross-port timing dependency.

How does the address counter function in the 70V9279S15PRFI, and what signals control it?

The 70V9279S15PRFI includes an independent 15-bit address counter per port, controlled by CNTENX (counter enable) and CNTRSTX (counter reset). When CNTENX is asserted low on the rising edge of CLKX, the counter increments automatically - eliminating need for external address generation. CNTRSTX asynchronously resets the counter to address 0. ADSX must be high to enable counter-based addressing; when ADSX is low, external addresses take precedence.

What is the power consumption profile of the 70V9279S15PRFI in full standby mode?

In full standby mode (both ports disabled with CMOS-level inputs: CE0X > VDD − 0.2 V, CE1X < 0.2 V, and all inputs at rail extremes), the 70V9279S15PRFI draws ≤ 5 mA typical (1.0–5.0 mA max) at 3.3 V - equating to ≤ 16.5 mW. This ultra-low quiescent current is achieved via internal power-gating of unused circuit blocks and is specified over the full –40°C to +85°C industrial temperature range.

Is the 70V9279S15PRFI pin-compatible with other members of the IDT70V92xx family?

The 70V9279S15PRFI shares the same 128-pin TQFP package and pinout with IDT70V9269 and IDT70V9289, differing only in memory depth (32K vs. 16K vs. 64K × 16). A14 is no-connect on IDT70V9269 but functional on 70V9279/70V9289. All control, data, and address signals map identically - enabling hardware reuse across density variants with only firmware or address decoding changes required.