Renesas 70V9289L9PRFI8

Overview

70V9289L9PRFI8 from IDT (Integrated Device Technology) is a high-speed, 3.3V synchronous dual-port static RAM with true dual-ported 64K × 18-bit memory architecture, supporting simultaneous independent read/write access on left and right ports. It delivers pipelined output mode with 15 ns cycle time (67 MHz), 9 ns max clock-to-data access, and industrial temperature operation (–40°C to +85°C). It is used in real-time digital signal processing systems requiring deterministic low-latency inter-processor communication.

For engineers reviewing the 70V9289L9PRFI8 datasheet, 70V9289L9PRFI8 pinout, 70V9289L9PRFI8 application, or 70V9289L9PRFI8 equivalent, key selection criteria include pipelined vs. flow-through timing modes, dual chip enable depth expansion capability, LVTTL-compatible 3.3V single-supply operation, and industrial-grade reliability for embedded control and telecom infrastructure designs.

Technical Context

The 70V9289L9PRFI8 implements fully synchronous dual-port operation with separate address, data, and control registers clocked on the rising edge of CLKL/CLKR. Its self-timed write architecture decouples internal write pulse generation from clock edge timing, enabling fast cycle times without external timing constraints.

It supports two configurable output modes via FT/PIPE pins: pipelined (15 ns cycle, 9 ns tCD2) for burst throughput or flow-through (25 ns cycle, 20 ns tCD1) for minimal latency. Dual chip enables (CE0/CE1 per port) allow seamless depth expansion without external logic, while independent upper/lower byte controls (UB/LB) support multiplexed bus interfacing and width expansion.

Key Specifications

Pinout & Package

70V9289L9PRFI8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 0.4 mm lead pitch and exposed thermal pad (not electrically connected). All VDD and VSS pins require local decoupling per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-166BZXI and AS7C362000B-15JIN, the 70V9289L9PRFI8 uniquely combines 18-bit width, industrial temperature rating, on-chip address counter, and dual chip enables - making it optimal for space-constrained, real-time embedded systems requiring deterministic dual-port behavior without external glue logic.

Availability

70V9289L9PRFI8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics data acquisition, and digital signal processor interfacing requiring stable component supply across extended product lifecycles.

Supply support for 70V9289L9PRFI8 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 solutions for communications, computing, and industrial markets.

The 70V9289L9PRFI8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems where concurrent access and timing predictability are critical.

FAQ

What is the maximum operating frequency of the 70V9289L9PRFI8 in pipelined mode?

The 70V9289L9PRFI8 supports a 15 ns clock cycle time in pipelined output mode, corresponding to a maximum operating frequency of 67 MHz. This is validated across the full industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, with all timing parameters guaranteed per the official IDT datasheet DSC-4856/9.

Does the 70V9289L9PRFI8 support independent timing domains for its left and right ports?

Yes, the 70V9289L9PRFI8 supports fully independent clock domains: CLKL and CLKR accept asynchronous clocks with no phase or frequency relationship required. Each port operates synchronously to its own clock, enabling heterogeneous system integration - for example, interfacing a 50 MHz FPGA port with a 67 MHz DSP port using the same 70V9289L9PRFI8 device.

How does the address counter function in the 70V9289L9PRFI8, and what signals control it?

The 70V9289L9PRFI8 includes a programmable address counter per port controlled by ADSL/ADSR (address strobe), CNTENL/CNTENR (counter enable), and CNTRSTL/CNTRSTR (counter reset). When CNTEN = VIL on a rising clock edge, the counter advances automatically - eliminating external address increment logic in sequential-access applications like circular buffers or DMA engines.

Can the 70V9289L9PRFI8 be used for depth expansion, and how is it implemented?

Yes, the 70V9289L9PRFI8 supports depth expansion using its dual chip enables (CE0X and CE1X per port). By tying CE0 of one device to CE1 of another and decoding a higher-order address bit (e.g., A16), two devices can be stacked to form a 128K × 18-bit memory without external logic - as confirmed in Figure 4 of the IDT datasheet DSC-4856/9.

What is the power consumption profile of the 70V9289L9PRFI8 in standby mode?

In full standby mode (both ports disabled with CMOS-level inputs), the 70V9289L9PRFI8 draws only 0.4 mA typical (2 mA max), per IDT datasheet Table 9a. This ultra-low ISB3 current is achieved when CE0X and CE1X are both held above VDD − 0.2 V, making it suitable for power-sensitive industrial applications with periodic wake-up cycles.