Renesas 709079S9PF8

Overview

709079S9PF8 from Integrated Device Technology is a 32K × 8-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from left and right ports, 15 ns clock-to-data access in pipelined mode, 25 ns flow-through cycle time, and industrial temperature support (–40°C to +85°C), used in high-speed packet buffering and real-time DSP co-processing systems.

For engineers reviewing the 709079S9PF8 datasheet, 709079S9PF8 pinout, 709079S9PF8 application, or 709079S9PF8 equivalent, this page delivers verified timing parameters, port-synchronous control logic, TTL-compatible 5V operation, and confirmed TQFP-100 packaging - all critical for deterministic latency design in telecom line cards and FPGA-based data acquisition.

Technical Context

The 709079S9PF8 implements fully synchronous dual-port architecture with independent clocked registers on address, data, and control inputs for both left and right ports, supporting 4 ns setup / 1 ns hold timing. Its self-timed write pulse operates independently of clock edge transitions, enabling minimal cycle time without external timing constraints.

It features dual chip enables (CE0/CE1) per port for seamless depth expansion, asynchronous output enable (OE), and configurable flow-through or pipelined output modes via FT/PIPE pin. The integrated address counter supports burst-mode addressing with CNTEN/CNTRST control, eliminating external address sequencing logic.

Key Specifications

Pinout & Package

709079S9PF8 is housed in a 100-pin TQFP (PN100) package with 0.5 mm pitch, 14 mm × 14 mm body size, and 1.4 mm height. All VCC and GND pins must be connected per datasheet note; A15 is No Connect (NC) for this 32K variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 709079S9PF8, CY7C028V-15AXC demands voltage translation and layout changes, while IDT70V9079S15PF offers identical functionality at 3.3 V with 30% lower active power - making it ideal for power-sensitive upgrades without architectural change.

Availability

709079S9PF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and test equipment requiring stable component supply across extended product lifecycles.

Supply support for 709079S9PF8 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) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, acquired by Renesas Electronics in 2019.

The IDT7090xx family was designed for deterministic-latency shared-memory applications in communications and embedded systems, emphasizing simultaneous dual-port access, synchronous timing control, and industrial-grade reliability.

FAQ

What is the memory capacity and organization of the 709079S9PF8?

The 709079S9PF8 is a 32K × 8-bit synchronous dual-port static RAM, providing 256 Kbits of storage. Unlike the 64K IDT709089 variant, it uses only A0–A14 address lines; A15 is designated No Connect (NC) per the datasheet. This fixed 32K configuration simplifies address decoding and reduces routing complexity in cost-sensitive industrial designs where full 64K is unnecessary.

Does the 709079S9PF8 support both flow-through and pipelined output modes?

Yes, the 709079S9PF8 supports both modes via the FT/PIPE pin on each port. When FT/PIPE = VIL, outputs are flow-through with 30 ns max access time; when FT/PIPE = VIH, outputs are pipelined with 15 ns max access time and one-cycle latency. This per-port configurability allows mixed-mode operation - for example, left port in pipelined mode for high-throughput streaming and right port in flow-through for low-latency control register access.

What is the operating temperature range certified for the 709079S9PF8?

The 709079S9PF8 is specified for industrial temperature operation from –40°C to +85°C, with all AC and DC electrical characteristics fully guaranteed across this range. This qualification is explicitly stated in the "Recommended Operating Temperature and Supply Voltage" table and confirmed in the ordering information footnote for the 'I' grade. It meets requirements for deployment in harsh environments such as factory-floor controllers and outdoor wireless base stations.

How does the address counter function in the 709079S9PF8?

The 709079S9PF8 includes independent address counters on both left and right ports, controlled by CNTEN and CNTRST inputs. When CNTEN = VIL on the rising clock edge, the counter advances to the next address regardless of CE or OE states. CNTRST = VIL resets the counter to address 0. This hardware counter eliminates the need for external address generation logic in burst-mode applications like FIFO emulation or waveform table playback, reducing FPGA gate count and system latency.

Is the 709079S9PF8 pin-compatible with other members of the IDT7090xx family?

The 709079S9PF8 shares the same 100-pin TQFP (PN100) package and pinout with IDT709089 variants, but A15 is NC for 709079 while functional for 709089. All other signals - including dual CE, R/W, OE, CLK, and counter controls - are identically mapped. This allows direct substitution in 32K-limited designs, though firmware must not reference A15. Full pin-compatibility is confirmed in the Pin Configuration diagram and Truth Table I of the datasheet.