Renesas 70V9289L9PRFGI

Overview

70V9289L9PRFGI 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 9ns max clock-to-data access, 15ns cycle time (67MHz), and industrial temperature operation (–40°C to +85°C) in a 128-pin TQFP package - used in real-time packet buffering for telecom line cards and FPGA co-processor memory interfaces.

For engineers reviewing the 70V9289L9PRFGI datasheet, 70V9289L9PRFGI pinout, 70V9289L9PRFGI application, or 70V9289L9PRFGI equivalent, key selection criteria include pipelined vs. flow-through output timing, dual chip enable depth expansion capability, LVTTL-compatible 3.3V I/O, separate upper/lower byte controls for multiplexed bus alignment, and counter-enable address auto-increment for burst transfers.

Technical Context

The 70V9289L9PRFGI implements fully synchronous dual-port operation with clocked address, data, and control registers on both ports - requiring only 4ns setup and 0ns hold time relative to CLK. Its self-timed internal write pulse decouples write completion from clock edge timing, enabling fast cycle times without external wait-state logic.

It supports two configurable output modes via FT/PIPE pins: pipelined (1-cycle latency, 15ns cycle time) and flow-through (0-cycle latency, 25ns cycle time). Address counters on each port are independently controlled by CNTEN and CNTRST signals, allowing automatic sequential addressing during burst transfers without host CPU intervention.

Key Specifications

Pinout & Package

70V9289L9PRFGI is housed in a 128-pin Thin Quad Flatpack (TQFP) with 0.4mm pitch, body size 14mm × 20mm × 1.4mm. All VDD (pins 20, 48, 70, 91, 103, 120) and VSS (pins 19, 47, 69, 90, 102, 119) must be properly decoupled. Pin functions are symmetrically distributed across left (L) and right (R) ports.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-133BZXI and AS7C362000B-15JIN, the 70V9289L9PRFGI uniquely integrates address counter control and ADS strobe - reducing FPGA logic utilization and enabling deterministic burst transfers without software overhead, while maintaining industrial temperature compliance.

Availability

70V9289L9PRFGI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and avionics subsystems requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V9289L9PRFGI 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.

The 70V9289L9PRFGI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency memory sharing between heterogeneous processors, FPGAs, and ASICs in real-time embedded systems.

FAQ

What is the maximum operating frequency of the 70V9289L9PRFGI in pipelined mode?

The 70V9289L9PRFGI supports a maximum clock frequency of 67MHz in pipelined output mode, corresponding to a 15ns cycle time (tCYC2) and 9ns max clock-to-data access (tCD2). This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3V ±0.3V supply voltage. The device achieves this using registered inputs and a self-timed write pulse that decouples internal write completion from clock timing.

Does the 70V9289L9PRFGI support independent address counters on both ports?

Yes, the 70V9289L9PRFGI provides fully independent address counters on the left and right ports, each controlled by dedicated CNTENL/CNTRSTL and CNTENR/CNTRSTR pins. When CNTEN is asserted low, the counter advances on each rising CLK edge regardless of CE or OE state. ADS input allows external address loading to override counter value - enabling hybrid burst/sequential access patterns essential for packet FIFOs and DMA buffers.

How does the dual chip enable (CE0/CE1) scheme simplify memory depth expansion with the 70V9289L9PRFGI?

The 70V9289L9PRFGI uses dual chip enables per port (CE0L/CE1L and CE0R/CE1R) to enable depth expansion without external logic. Per Truth Table I, asserting CE0 = VIH or CE1 = VIL deselects the port and places it in low-power standby. In a two-device stack, one device can be enabled via CE0L = VIL/CE1L = VIH while the other uses CE0L = VIH/CE1L = VIH - allowing simple address decoding via A16 or higher bits without additional gates or CPLDs.

Can the 70V9289L9PRFGI operate in both pipelined and flow-through output modes simultaneously on different ports?

Yes, the 70V9289L9PRFGI supports independent output mode selection per port via FT/PIPEL and FT/PIPER pins. Setting FT/PIPEL = VIH configures the left port for pipelined operation (1-cycle latency), while FT/PIPER = VIL configures the right port for flow-through (0-cycle latency). This flexibility allows system architects to optimize one port for minimum latency (e.g., real-time control reads) and the other for jitter-free output (e.g., display or audio streaming).

What is the power consumption profile of the 70V9289L9PRFGI in full standby mode?

In full standby mode (ISB3), where both ports are disabled with CMOS-level inputs (CE0/CE1 > VDD − 0.2V and all inputs at rail), the 70V9289L9PRFGI consumes only 0.4mA typical (1.3mW at 3.3V) across the industrial temperature range. This ultra-low standby current is achieved through complete gating of internal clock trees and I/O drivers - making it suitable for battery-backed or energy-harvesting systems requiring extended sleep periods without data loss.