Renesas 70V9289L9PRFI

Overview

70V9289L9PRFI from IDT (Integrated Device Technology) is a high-speed, 3.3V, 64K × 18-bit synchronous dual-port static RAM with pipelined and flow-through output modes, 9ns max clock-to-data access in pipelined mode, industrial temperature range (–40°C to +85°C), and true dual-ported memory cells enabling simultaneous read/write access to the same address - used in real-time DSP co-processing and FPGA-based communication buffers.

For engineers reviewing the 70V9289L9PRFI datasheet, 70V9289L9PRFI pinout, 70V9289L9PRFI application, or 70V9289L9PRFI equivalent, key selection criteria include pipelined vs. flow-through timing control, dual chip enable for depth expansion, LVTTL-compatible 3.3V operation, and industrial-grade reliability for embedded telecom and test equipment.

Technical Context

This device implements fully synchronous dual-port architecture with independent left/right ports, each featuring clocked address, data, and control registers, 4ns setup/0ns hold timing, and self-timed write for minimal cycle time. It supports both pipelined (12ns cycle, 83MHz) and flow-through (25ns cycle) output modes selected per port via FT/PIPE pins.

The integrated address counter enables burst-mode sequential access without external address generation; counter enable (CNTEN) and reset (CNTRST) are synchronized to CLK, and separate upper-byte (UB/UBR) and lower-byte (LB/LBR) controls support multiplexed bus interfacing and byte-level granularity in mixed-width systems.

Key Specifications

Pinout & Package

70V9289L9PRFI is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14mm × 20mm × 1.4mm, with 28 dedicated VDD/VSS power/ground pins distributed across all four sides for low-noise operation and robust decoupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and AS7C362000B-12JIN, the 70V9289L9PRFI delivers guaranteed industrial temperature operation, true synchronous pipelining with counter support, and native 3.3V LVTTL compatibility - making it the sole choice for new designs requiring deterministic low-latency dual-port memory in harsh environments.

Availability

70V9289L9PRFI is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, and test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for 70V9289L9PRFI 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 70V9289L9PRFI belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time embedded systems requiring concurrent, low-latency memory access between heterogeneous processors or data paths.

FAQ

What is the maximum operating frequency of the 70V9289L9PRFI in pipelined mode?

The 70V9289L9PRFI supports up to 67MHz operation in pipelined mode, corresponding to a 15ns maximum clock cycle time (tCYC2) over the industrial temperature range. This is validated by AC electrical characteristics in Table 11a of the datasheet and enables high-throughput data buffering in FPGA and DSP subsystems. The 70V9289L9PRFI achieves this while maintaining 9ns max clock-to-data-out timing, critical for minimizing inter-processor latency.

Does the 70V9289L9PRFI support independent output modes on left and right ports?

Yes, the 70V9289L9PRFI provides independent flow-through/pipelined mode selection per port via dedicated FT/PIPEL and FT/PIPER pins. When FT/PIPEL = VIH, the left port operates in pipelined mode (1-cycle latency); when FT/PIPEL = VIL, it operates in flow-through mode (0-cycle latency). The same applies to the right port. This flexibility allows asymmetric optimization - for example, using pipelined reads on one port for throughput and flow-through writes on the other for timing determinism - all within a single 70V9289L9PRFI device.

How does the address counter in the 70V9289L9PRFI function during burst access?

The 70V9289L9PRFI's address counter advances on the rising edge of CLK when CNTEN = VIL, regardless of chip enable or byte select states. With ADS = VIH, the counter increments automatically; with ADS = VIL, an external address is loaded instead. This enables seamless burst-mode sequential access - for example, reading 64 consecutive 18-bit words from the 70V9289L9PRFI without external address generation. CNTRST synchronously resets the counter to address 0, ensuring repeatable pattern replay in test equipment applications.

What power-saving features does the 70V9289L9PRFI offer in standby mode?

The 70V9289L9PRFI offers multi-level standby power management: full standby (ISB3) draws just 0.4mA typ (1.3mW) when both ports are disabled with CMOS-level inputs; partial standby (ISB2) draws 110mA typ (363mW) when one port is active and outputs disabled. Power-down is controlled per port via dual chip enables - asserting CE0 = VIH or CE1 = VIL for one clock cycle disables that port's internal circuitry. These features make the 70V9289L9PRFI suitable for battery-backed or low-duty-cycle industrial monitoring systems.

Can the 70V9289L9PRFI be used for depth expansion without external logic?

Yes, the 70V9289L9PRFI supports logic-free depth expansion using its dual chip enables (CE0/CE1) per port. As shown in Figure 4 of the datasheet, connecting A16 to CE0 of a second device while tying its CE1 to VDD enables seamless 128K×18 expansion. Each port's CE0/CE1 pair allows independent activation - for example, CE0L = VIL & CE1L = VIH enables left port, while CE0R = VIH deselects right port. This eliminates address decoding logic, reduces PCB area, and improves signal integrity in multi-chip memory banks built with the 70V9289L9PRFI.