Renesas 709279S9PF8

Overview

709279S9PF8 from Integrated Device Technology is a high-speed 32K × 16-bit synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from both ports, 9 ns max clock-to-data access (flow-through mode), 15 ns cycle time (pipelined mode), and TTL-compatible 5 V ±10% operation - used in real-time interprocessor communication and high-bandwidth FIFO buffering.

For engineers reviewing the 709279S9PF8 datasheet, 709279S9PF8 pinout, 709279S9PF8 application, or 709279S9PF8 equivalent, key selection criteria include pipelined vs. flow-through output mode configuration via FT/PIPE pin, dual chip enable architecture for depth expansion, and industrial-grade temperature support (–40°C to +85°C) at 12 ns speed grade.

Technical Context

The 709279S9PF8 implements fully synchronous operation on both left and right ports, with all control, address, and data inputs registered on the rising edge of CLKL/CLKR. It supports two distinct output modes: flow-through (data valid after one clock, tCD1 ≤ 20 ns) or pipelined (data valid after two clocks, tCD2 ≤ 9 ns), selected per port via dedicated FT/PIPEL and FT/PIPER pins.

Each port features independent counter enable (CNTENL/CNTENR) and reset (CNTRSTL/CNTRSTR) controls, allowing autonomous address generation for burst transfers. Dual chip enables (CE0X/CE1X) provide selective power-down per port, with CE0X = VIL and CE1X = VIH enabling active operation while CE0X = VIH or CE1X = VIL forces standby (ISB3 ≤ 0.2 mA).

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), PN100 package; body dimensions 14 mm × 14 mm × 1.4 mm; lead finish SnPb (obsolete), RoHS-compliant green variants available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V9279S15PF, the 709279S9PF8 uniquely delivers 9 ns flow-through access at 5 V while maintaining full industrial temperature range support - making it optimal for latency-critical upgrades of existing 5 V platforms.

Availability

709279S9PF8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, high-speed FIFO buffering, telecom line card packet storage, and automated test equipment pattern memory requiring stable component supply and long-term industrial lifecycle support.

Supply support for 709279S9PF8 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 IDT709279 family was designed specifically for high-bandwidth, low-latency dual-ported memory applications in embedded systems where deterministic access timing and concurrent port operation are essential - such as baseband processors, network switches, and real-time controllers.

FAQ

What is the maximum operating frequency of the 709279S9PF8 in pipelined output mode?

The 709279S9PF8 supports up to 67 MHz in pipelined output mode, derived from its 15 ns minimum clock cycle time (tCYC2). This timing is guaranteed across the industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, enabling sustained high-throughput data transfer without wait states in FPGA or ASIC-based systems.

Does the 709279S9PF8 support independent address counters on both ports?

Yes, the 709279S9PF8 provides fully independent address counters on left and right ports, each controlled by dedicated CNTENL/CNTRSTL and CNTENR/CNTRSTR signals. The counter advances on the rising edge of CLKX when CNTENX = VIL, and resets to address zero when CNTRSTX is asserted - enabling autonomous burst transfers per port without host intervention.

How does the FT/PIPE pin affect timing behavior of the 709279S9PF8?

The FT/PIPEL and FT/PIPER pins configure output timing mode independently per port: logic low selects flow-through mode (data valid after one clock, tCD1 ≤ 20 ns), while logic high enables pipelined mode (data valid after two clocks, tCD2 ≤ 9 ns). These are DC-level inputs and must remain stable during operation - they are not sampled on clock edges.

Can the 709279S9PF8 be used in a 5 V-only system without level shifters?

Yes, the 709279S9PF8 is fully TTL-compatible with 5 V ±10% supply and input thresholds (VIH ≥ 2.2 V, VIL ≤ 0.8 V), allowing direct interface to legacy 5 V microcontrollers, CPLDs, and bus transceivers. Its outputs drive standard TTL loads, and no level-shifting circuitry is required for pure 5 V system integration.

What is the standby current consumption of the 709279S9PF8 in full standby mode?

In full standby mode - defined as both ports disabled with CE0X > VCC – 0.2 V and CE1X < 0.2 V, and all inputs at valid CMOS levels - the 709279S9PF8 consumes ≤ 0.2 mA typical (ISB3), verified across the industrial temperature range. This ultra-low quiescent current supports energy-sensitive applications like remote telemetry nodes and battery-backed systems.