Renesas 709289L7PF8

Overview

IDT709289L7PF8 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 cycle time in pipelined mode, industrial temperature range (–40°C to +85°C), and TTL-compatible 5V ±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 IDT709289L7PF8 datasheet, IDT709289L7PF8 pinout, IDT709289L7PF8 application, or IDT709289L7PF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-port depth expansion capability via CE0/CE1, byte-selectable write control (UB/LB), and industrial-grade reliability for deterministic memory access in safety-critical embedded systems.

Technical Context

This device implements fully synchronous dual-port architecture with independent left/right clock domains (CLKL/CLKR), registered address/data/control inputs, and self-timed internal write pulses decoupled from clock edge timing. Each port features dedicated address strobe (ADSL/ADSR), counter enable (CNTENL/CNTENR), and reset (CNTRSTL/CNTRSTR) for autonomous address sequencing.

It supports two distinct output modes per port: pipelined (FT/PIPE = VIH, 7.5 ns tCD2 typical) or flow-through (FT/PIPE = VIL, 18 ns tCD1 max), selectable independently on left and right sides. Dual chip enables (CE0/CE1 per port) allow seamless depth expansion without external logic, while separate upper- and lower-byte controls (UB/LB) ensure compatibility with multiplexed 16-bit buses.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), PN100 footprint, body size 14 mm × 14 mm × 1.4 mm. All V_CC pins must be connected to 5V supply; all GND pins require solid ground plane connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AC and R1EX24064ASAS0I#U0, IDT709289L7PF8 uniquely combines industrial temperature support, programmable pipelined/flow-through output modes per port, integrated address counter with reset, and native 5V operation - making it the sole choice for deterministic latency-critical upgrades of legacy telecom and rail infrastructure.

Availability

IDT709289L7PF8 is available at Aetrix Electronics and suitable for telecom line card buffering, FPGA-based motor control, railway signaling interlocking, and avionics display refresh requiring stable component supply across extended product lifecycles.

Supply support for IDT709289L7PF8 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, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

IDT709289L7PF8 belongs to IDT's synchronous dual-port SRAM product line, engineered for deterministic latency, concurrent multi-processor memory access, and ruggedized operation in mission-critical infrastructure equipment.

FAQ

What is the maximum operating frequency of IDT709289L7PF8 in pipelined mode?

IDT709289L7PF8 supports up to 83 MHz operation in pipelined output mode, corresponding to a 12 ns clock cycle time (tCYC2). This timing is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply voltage, enabling high-throughput data exchange between FPGAs and microprocessors without timing margin compromises.

Does IDT709289L7PF8 support independent output modes on left and right ports?

Yes, IDT709289L7PF8 allows independent configuration of pipelined (FT/PIPE = VIH) or flow-through (FT/PIPE = VIL) output timing on each port via dedicated FT/PIPEL and FT/PIPER pins. This enables hybrid system architectures - for example, pipelined mode on the processor port for maximum bandwidth and flow-through mode on the peripheral port for zero-latency response.

How does the address counter function in IDT709289L7PF8?

IDT709289L7PF8 integrates a 16-bit address counter per port, controlled by CNTENL/CNTENR and CNTRSTL/CNTRSTR. When CNTEN = VIL on the rising clock edge, the counter advances automatically; CNTRST = VIL resets it to address 0. The counter operates independently of ADS, enabling autonomous sequential access for DMA engines or waveform generators without host CPU involvement.

Can IDT709289L7PF8 be used for depth expansion without external logic?

Yes, IDT709289L7PF8 supports seamless depth expansion using only its dual chip enables (CE0/CE1 per port). By cascading CE0 and CE1 signals across multiple devices - for example, tying CE0 of Device N+1 to CE1 of Device N - designers achieve arbitrary memory depth extension with no additional gates, simplifying layout and improving signal integrity in high-density routing.

What is the power consumption profile of IDT709289L7PF8 in standby mode?

IDT709289L7PF8 consumes 2.5 mW typical standby power (ISB3) when both ports are fully disabled (CE0 and CE1 set to high-impedance states with CMOS-level inputs). In partial standby (one port active), ISB4 is 190 mA typical at 5V - optimized for systems requiring rapid wake-up from low-power states while maintaining real-time responsiveness.