Renesas 70V9289L7PF

Overview

70V9289L7PF 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 read/write access to the same address on independent left and right ports. It delivers pipelined output mode with 12 ns cycle time (83 MHz), 7.5 ns clock-to-data access, and industrial-grade operation from –40°C to +85°C - used in real-time DSP co-processing, FPGA interconnect buffering, and telecom packet switching.

For engineers reviewing the 70V9289L7PF datasheet, 70V9289L7PF pinout, 70V9289L7PF application, or 70V9289L7PF equivalent, key selection criteria include its dual-chip-enable depth expansion capability, flow-through/pipelined output mode selection via FT/PIPE pins, LVTTL-compatible 3.3V single-supply interface, and support for address counter auto-increment in burst-access systems.

Technical Context

The 70V9289L7PF implements fully synchronous dual-port operation with registered address, data, and control inputs on both ports - all sampled on the rising edge of CLKL/CLKR. Its self-timed write pulse decouples internal write timing from clock edge transitions, enabling minimal cycle time without external wait-state logic.

It supports two distinct output modes: Flow-Through (FT/PIPE = VIL) with 18 ns max clock-to-data and Pipelined (FT/PIPE = VIH) with 7.5 ns max clock-to-data and 12 ns cycle time. Separate upper-byte (UB/LB) and lower-byte (UBL/LBL) controls enable multiplexed bus compatibility and byte-level granularity for 16-bit or 18-bit data paths.

Key Specifications

Pinout & Package

70V9289L7PF is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 32 dedicated I/O pins per port (I/O0L–I/O17L and I/O0R–I/O17R), dual clock inputs (CLKL/CLKR), and independent control sets including CE0/CE1, R/W, OE, UB/LB, ADS, CNTEN, and CNTRST per 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 AS7C362000B-12JIN, the 70V9289L7PF uniquely combines industrial temperature rating, integrated address counter with ADS strobe, and dual CE-based depth expansion - making it optimal for ruggedized, high-reliability embedded systems requiring deterministic burst memory access.

Availability

70V9289L7PF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics display systems, and FPGA/DSP co-processing applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 70V9289L7PF 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 70V9289L7PF belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for real-time, low-latency inter-processor and FPGA-ASIC bridging applications demanding concurrent access, deterministic timing, and industrial reliability.

FAQ

What is the maximum operating frequency of the 70V9289L7PF in pipelined mode?

The 70V9289L7PF achieves a 12 ns clock cycle time in pipelined output mode (FT/PIPE = VIH), corresponding to a maximum operating frequency of 83 MHz per port. This specification is guaranteed across the full industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, enabling sustained high-bandwidth data transfer without wait states in the 70V9289L7PF.

Does the 70V9289L7PF support true simultaneous read and write to the same memory location?

Yes, the 70V9289L7PF uses true dual-ported memory cells that permit independent, concurrent read and write operations to the exact same address - one port reading while the other writes. This capability is fundamental to its role in lock-free inter-processor communication and real-time buffering, and is explicitly confirmed in the functional description and truth tables of the 70V9289L7PF datasheet.

How does the address counter function in the 70V9289L7PF, and what signals control it?

The 70V9289L7PF integrates a synchronous address counter per port, controlled by CNTENL/CNTENR (enable), CNTRSTL/CNTRSTR (reset), and ADSL/ADSR (address strobe). When CNTEN = VIL on the rising CLK edge, the counter advances; when ADS = VIL, the external address is loaded. This allows automatic burst addressing - critical for DMA engines - and is a distinguishing feature of the 70V9289L7PF versus basic dual-port SRAMs.

What is the purpose of the dual chip enable (CE0 and CE1) signals on each port of the 70V9289L7PF?

Each port of the 70V9289L7PF has two independent chip enables (CE0X and CE1X) to support depth expansion without external logic: CE0 = VIH or CE1 = VIL places the port in low-power standby (1.5 mW), while CE0 = VIL and CE1 = VIH enables normal operation. This dual-CE scheme allows stacking multiple 70V9289L7PF devices to increase memory depth - e.g., two devices yield 128K × 18 - using only one address bit for bank selection.

Is the 70V9289L7PF pin-compatible with other members of the IDT70V9389/289 family, such as the 70V9389L7PF?

No, the 70V9289L7PF is not pin-compatible with the 70V9389L7PF. While both share the same 128-pin TQFP package and core architecture, the 70V9289L7PF implements I/O0–I/O15 (16-bit data path) plus I/O16–I/O17 (two additional bits), whereas the 70V9389L7PF supports full 18-bit I/O0–I/O17. Pin assignments for I/O16L/I/O17L and I/O16R/I/O17R differ, and the 70V9289L7PF datasheet explicitly notes distinct pin configurations - confirming non-interchangeability at the board level.