Renesas 70V9289L9PRF

Overview

70V9289L9PRF 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, pipelined/flow-through output modes, 9ns max clock-to-data access in pipelined mode, and industrial temperature support (–40°C to +85°C). It enables simultaneous read/write access from independent left/right ports in real-time communication buffers and FPGA co-processing systems.

For engineers reviewing the 70V9289L9PRF datasheet, 70V9289L9PRF pinout, 70V9289L9PRF application, or 70V9289L9PRF equivalent, this device is selected for deterministic latency control in bidirectional data exchange between heterogeneous processors, where synchronous timing, byte-selectable I/O, and depth-expansible chip enables are critical.

Technical Context

The 70V9289L9PRF implements fully synchronous operation on both ports with registered address, data, and control inputs-requiring only 4ns setup and 0ns hold time relative to CLK. Its self-timed write architecture decouples internal write pulse generation from clock edge timing, enabling minimal cycle time.

It supports two distinct output modes: pipelined (12ns cycle, 83MHz operation, 7.5ns tCD2) and flow-through (25ns cycle, 40MHz, 20ns tCD1), selected per port via FT/PIPE pins. Dual chip enables (CE0/CE1) allow seamless depth expansion without external logic, while separate UBL/LBL controls enable multiplexed bus compatibility.

Key Specifications

Pinout & Package

70V9289L9PRF is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14mm × 20mm × 1.4mm, with 32 dedicated I/O pins (I/O0L–I/O17L and I/O0R–I/O17R), dual independent clocks (CLKL/CLKR), and separate byte controls (UBL/LBL, UBR/LBR) for each port.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100AXC and IS61WV6416BLL-10MLI, the 70V9289L9PRF uniquely delivers industrial-temperature-rated synchronous pipelining with integrated address counter and dual CE-based depth expansion - making it the only option for new designs requiring all three features simultaneously.

Availability

70V9289L9PRF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and avionics applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V9289L9PRF 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 and computing markets.

The 70V9289L9PRF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered for deterministic-latency inter-processor communication in telecom, test equipment, and real-time control systems.

FAQ

What is the maximum operating frequency of the 70V9289L9PRF in pipelined mode?

The 70V9289L9PRF supports up to 66.7 MHz in pipelined output mode, derived from its 15ns maximum clock cycle time (tCYC2). This is validated across the full industrial temperature range (–40°C to +85°C) and 3.3V ±0.3V supply, with guaranteed 9ns max clock-to-data access (tCD2) and 5ns min clock high/low times (tCH2/tCL2).

Does the 70V9289L9PRF support independent output modes on left and right ports?

Yes, the 70V9289L9PRF allows independent configuration of pipelined or flow-through output mode per port using FT/PIPEL and FT/PIPER pins. This enables mixed-mode operation - for example, left port in pipelined mode for low-latency CPU access and right port in flow-through mode for FPGA burst writes - without cross-port timing constraints.

How does the address counter function in the 70V9289L9PRF, and what signals control it?

The 70V9289L9PRF integrates a hardware address counter controlled by ADSL/ADSR (address strobe), CNTENL/CNTENR (counter enable), and CNTRSTL/CNTRSTR (counter reset). When ADS = VIL, the external address loads on CLK rise; when CNTEN = VIL, the counter auto-increments on each CLK rise. CNTRST = VIL forces reset to address 0 - enabling efficient FIFO or circular buffer implementation without CPU intervention.

What power-saving features does the 70V9289L9PRF offer, and how are they activated?

The 70V9289L9PRF provides four standby modes. Full standby (ISB3 = 0.4mA max) activates when both CE0 and CE1 are held >VDD–0.2V. Per-port standby (ISB2/ISB4) engages when one CE pair is active and the other is inactive. Power-down occurs within one clock cycle of CE0=VIH or CE1=VIL, reducing active current to sub-µA levels - critical for battery-backed or thermally constrained systems.

Can the 70V9289L9PRF be used for depth expansion, and what is required to implement it?

Yes, the 70V9289L9PRF supports seamless depth expansion using its dual chip enables (CE0/CE1). To expand two devices, tie CE0 of Device 1 to ground and CE1 to a higher-order address bit (e.g., A16), while reversing the assignment for Device 2. No additional logic is needed - the internal CE decoding handles banking automatically, preserving timing integrity and eliminating layout complexity.