Renesas 709289L12PF8

Overview

IDT709289L12PF8 from Integrated Device Technology is a high-speed 64K × 16-bit synchronous pipelined dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address from both ports, 12 ns clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5 V ±10% single-supply operation - used in real-time DSP co-processing, FPGA-based communication buffers, and redundant control system memory arbitration.

For engineers reviewing the IDT709289L12PF8 datasheet, IDT709289L12PF8 pinout, IDT709289L12PF8 application, or IDT709289L12PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-chip-enable depth expansion capability, separate upper/lower byte controls for multiplexed bus compatibility, and industrial-grade reliability for embedded control subsystems.

Technical Context

This device implements fully synchronous dual-port architecture with registered address, data, and control inputs on both left and right ports - all latched on the rising edge of CLKL/CLKR. It supports two distinct output modes: pipelined (FT/PIPE = VIH) with 7.5 ns tCD2 and 12 ns cycle time at 83 MHz, or flow-through (FT/PIPE = VIL) with 25 ns tCD1 and 30 ns cycle time.

The integrated address counter enables burst-mode sequential access via CNTEN/CNTRST signals, while dual chip enables (CE0/CE1 per port) allow seamless depth expansion without external logic. Self-timed write and 4 ns setup / 0 ns hold timing minimize system-level timing margin requirements.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm. All V_CC and GND pins must be connected per datasheet note; package is RoHS-compliant and green (Pb-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT709289L12PF8, CY7C028V-15AC offers lower power but mandates 3.3 V infrastructure changes, while R1EX24064AS0C0I#U0 sacrifices synchronous timing guarantees for simpler interface - making IDT709289L12PF8 the sole choice for 5 V, industrial-grade, pipelined dual-port requirements.

Availability

IDT709289L12PF8 is available at Aetrix Electronics and suitable for real-time DSP co-processing, FPGA-based communication buffers, and redundant control system memory arbitration requiring stable component supply across extended product lifecycles.

Supply support for IDT709289L12PF8 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, designs high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

IDT709289L12PF8 belongs to IDT's synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in industrial control, telecom infrastructure, and test equipment.

FAQ

What is the maximum operating frequency of the IDT709289L12PF8 in pipelined mode?

The IDT709289L12PF8 supports up to 83 MHz operation in pipelined output mode, derived from its 12 ns maximum clock cycle time (tCYC2). This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply, with all timing margins met under AC test conditions per datasheet Table 11.

Does the IDT709289L12PF8 support independent clock domains on left and right ports?

Yes, the IDT709289L12PF8 features fully independent CLKL and CLKR inputs, each controlling synchronous registration of address, data, and control signals on its respective port. The device requires no phase alignment between clocks, enabling true asynchronous domain bridging - confirmed by timing waveforms in Figures 8 and 10 of the datasheet.

How does the address counter function in the IDT709289L12PF8, and what signals control it?

The IDT709289L12PF8 integrates an on-chip address counter per port, controlled by CNTENL/CNTENR (enable) and CNTRSTL/CNTRSTR (reset) signals. When CNTEN = VIL on a rising clock edge, the counter advances; when CNTRST = VIL, it resets to address 0. This enables burst-mode sequential access without external address generation logic - detailed in Truth Table II and Figure 15.

Can the IDT709289L12PF8 be used in depth-expanded configurations, and what pins enable this?

Yes, the IDT709289L12PF8 supports depth expansion using its dual chip enables CE0 and CE1 per port. As shown in Figure 4 of the datasheet, connecting CE0 of one device to CE1 of another enables seamless stacking without external decoding logic. This configuration maintains full 16-bit width while doubling depth to 128K × 16 - validated in Truth Table I and Application Description section.

What is the power consumption profile of the IDT709289L12PF8 in standby mode?

In full standby (ISB3), where both ports are disabled with CMOS-level inputs, the IDT709289L12PF8 draws just 0.5 mA typical (2.5 mW at 5 V). With one port active and outputs disabled (ISB2), current rises to 150 mA typical (750 mW). These values are specified for the industrial grade and measured at f = fMAX per Table 9 in the datasheet.