Renesas 70V9079S7PF

Overview

70V9079S7PF from IDT (now part of Renesas) is a high-speed 32K × 8-bit synchronous dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location from independent left and right ports. It operates at 3.3V, supports pipelined (12 ns cycle, 83 MHz) and flow-through (30 ns cycle) output modes, and integrates address counters with enable/reset for burst data handling in telecom and packet buffering applications.

For engineers reviewing the 70V9079S7PF datasheet, 70V9079S7PF pinout, 70V9079S7PF application, or 70V9079S7PF equivalent, key selection criteria include dual-port timing latency, industrial temperature support (–40°C to +85°C), TQFP-100 package compatibility, low standby power (1.32 mW typ.), and synchronous LVTTL interface compliance.

Technical Context

The 70V9079S7PF implements fully synchronous operation on both ports with 4 ns setup / 1 ns hold on all control, address, and data inputs. Its internal architecture includes dedicated address/data/control registers per port, self-timed write logic, and independent clock domains synchronized to rising-edge-triggered CLKL/CLKR signals.

It supports two configurable output modes via FT/PIPE pins: pipelined (1-cycle latency, 7.5 ns clock-to-data in commercial grade) and flow-through (0-cycle latency, 12 ns max access in industrial grade). Address counter logic enables automatic sequential addressing across bursts without external increment logic.

Key Specifications

Pinout & Package

70V9079S7PF is housed in a 100-pin Thin Quad Flatpack (TQFP) with exposed thermal pad, body dimensions 14 mm × 14 mm × 1.4 mm. All VDD pins require local 0.1 µF decoupling; all GND pins must be connected 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 AS7C33256P-20JCN, the 70V9079S7PF uniquely combines industrial temperature rating, integrated address counter, and selectable pipelined/flow-through output modes - making it optimal for real-time embedded buffering where deterministic latency and burst efficiency are critical.

Availability

70V9079S7PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, medical imaging, and automated test equipment requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V9079S7PF 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, is a fabless semiconductor company specializing in high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 70V9079S7PF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency data buffering in multi-processor and packet-processing systems where concurrent access and precise timing control are essential.

FAQ

What is the maximum operating frequency of the 70V9079S7PF in pipelined mode?

The 70V9079S7PF achieves a 20 ns clock cycle time in pipelined mode under industrial conditions (–40°C to +85°C), supporting a maximum operating frequency of 50 MHz. This is confirmed in Table 11b of the datasheet for the 70V9079X12 variant, which matches the 70V9079S7PF's industrial-grade specification. The 70V9079S7PF maintains full functionality at this rate with guaranteed timing margins.

Does the 70V9079S7PF support true simultaneous read/write to the same address?

Yes, the 70V9079S7PF uses true dual-ported memory cells that allow independent, concurrent read and write operations to the exact same memory location from its left and right ports - without arbitration, collision detection, or data corruption. This capability is explicitly stated in the "Features" section and verified by the functional block diagram showing separate I/O paths and control logic per port.

What is the purpose of the FT/PIPE pin on the 70V9079S7PF?

The FT/PIPE pin on the 70V9079S7PF selects between two output timing modes: Flow-Through (FT/PIPE = VIL) provides zero-cycle latency with data appearing on the bus within one clock cycle, while Pipelined (FT/PIPE = VIH) adds one-cycle latency for improved timing margin and higher clock rates. Each port has its own FT/PIPE pin (FT/PIPEL and FT/PIPER), enabling independent configuration per port.

Can the 70V9079S7PF be used in depth-expansion configurations without external logic?

Yes, the 70V9079S7PF supports depth expansion using only its dual chip enables (CE0X/CE1X per port) - no external decoding logic is required. As shown in Figure 4 of the datasheet, cascading multiple 70V9079S7PF devices is achieved by routing higher-order address bits to CE0/CE1 inputs, allowing seamless extension of memory depth while preserving full dual-port functionality across all devices.

What is the standby power consumption of the 70V9079S7PF at industrial temperature?

At industrial temperature (–40°C to +85°C), the 70V9079S7PF consumes 1.32 mW typical standby power (ISB3, full standby with CMOS-level inputs), as specified in the "Low-power operation" feature list and confirmed in Table 9b for the 70V9079X12 variant. This ultra-low quiescent power enables use in always-on industrial systems with strict thermal and energy budgets.