Renesas 709289L12PFI8

Overview

IDT709289L12PFI8 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 5V ±10% supply. It serves real-time interprocessor communication and video frame buffering in embedded control systems.

For engineers reviewing the IDT709289L12PFI8 datasheet, IDT709289L12PFI8 pinout, IDT709289L12PFI8 application, or IDT709289L12PFI8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual-chip-enable depth expansion capability, counter enable/reset functionality, and industrial-grade reliability for deterministic memory coherency across asynchronous domains.

Technical Context

This device 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 self-timed write cycles and provides separate upper-byte (UB/LBR) and lower-byte (LBL/UBR) controls for multiplexed bus compatibility.

The integrated address counter advances on CNTENL/CNTENR low with CNTRSTL/CNTRSTR enabling reset to address zero. FT/PIPEL and FT/PIPER pins independently configure each port for flow-through (zero-latency read) or pipelined (one-cycle latency, 83 MHz max) output modes - confirmed for IDT709289L12PFI8 per AC Electrical Characteristics Table 11.

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 1–2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV18-167BZI and IDT70V9289L12PFI, the IDT709289L12PFI8 offers unique industrial-temperature-rated dual-counter capability and 5V TTL compatibility - making it optimal for legacy industrial systems where voltage translation and timing predictability are non-negotiable.

Availability

IDT709289L12PFI8 is available at Aetrix Electronics and suitable for industrial motion controllers, avionics display processors, telecom packet buffers, and video frame buffering systems requiring stable component supply across extended product lifecycles.

Supply support for IDT709289L12PFI8 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 sensor solutions for communications, computing, and industrial markets.

IDT709289L12PFI8 belongs to IDT's high-performance synchronous dual-port SRAM product line, designed specifically for deterministic interprocessor communication and real-time data buffering in safety-critical embedded systems.

FAQ

What is the maximum operating frequency of IDT709289L12PFI8 in pipelined mode?

IDT709289L12PFI8 supports up to 50 MHz operation in pipelined mode, corresponding to a 20 ns clock cycle time (tCYC2) as specified in Table 11 of the datasheet. This enables sustained 800 MB/s throughput per port when used with full 16-bit data bursts and proper PCB layout.

Does IDT709289L12PFI8 support independent output mode selection for left and right ports?

Yes, IDT709289L12PFI8 supports independent output mode configuration: FT/PIPEL controls the left port and FT/PIPER controls the right port. When driven low, each port operates in flow-through mode (zero-latency read); when driven high, it enters pipelined mode (1-cycle latency, higher frequency).

Can IDT709289L12PFI8 perform simultaneous read and write to the same memory location?

Yes, IDT709289L12PFI8 uses true dual-ported memory cells that allow simultaneous read from one port and write to the same address on the other port - a core feature confirmed in the Functional Block Diagram and Features section of the datasheet.

What is the purpose of the dual chip enables (CE0 and CE1) on each port of IDT709289L12PFI8?

The dual chip enables CE0X and CE1X per port allow flexible depth expansion: CE0X = low and CE1X = high enables the port; CE0X = high or CE1X = low disables it. This enables stacking multiple IDT709289L12PFI8 devices without external logic, as shown in Figure 4 of the datasheet.

Is IDT709289L12PFI8 compatible with 3.3 V logic interfaces?

No, IDT709289L12PFI8 requires a single 5.0 V ±10% supply and is TTL-compatible - its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output levels (VOH = 2.4 V min, VOL = 0.4 V max) are specified for 5 V operation. Direct connection to 3.3 V logic requires level translation.