Renesas 70V9289L12PRF8

Overview

70V9289L12PRF8 from Integrated Device Technology is a high-speed 3.3V 64K × 18-bit synchronous dual-port pipelined SRAM with true dual-ported memory cells, 12ns clock cycle time in pipelined mode, 7.5ns clock-to-data access, and industrial temperature support (–40°C to +85°C). It enables simultaneous read/write access from independent left and right ports in telecom switching fabric, network packet buffering, and real-time DSP co-processing systems.

For engineers reviewing the 70V9289L12PRF8 datasheet, 70V9289L12PRF8 pinout, 70V9289L12PRF8 application, or 70V9289L12PRF8 equivalent, key selection criteria include pipelined vs. flow-through output timing, dual chip enable depth expansion capability, LVTTL-compatible 3.3V operation, and counter-enabled address auto-increment for burst transfers.

Technical Context

The 70V9289L12PRF8 implements fully synchronous operation on both ports with registered address, data, and control inputs-requiring only 4ns setup and 0ns hold 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 (FT/PIPE = VIH) for 12ns cycle time at 83MHz, and flow-through (FT/PIPE = VIL) for 30ns cycle time. Separate upper-byte (UB/UBR) and lower-byte (LB/LBR) controls allow multiplexed bus compatibility and byte-level granularity during concurrent port operations.

Key Specifications

Pinout & Package

70V9289L12PRF8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14mm × 20mm × 1.4mm, with 32 dedicated I/O pins per port (I/O0L–I/O17L and I/O0R–I/O17R), dual independent clocks (CLKL/CLKR), and separate 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 CY7C1362BV33-12BGXI and AS7C362000B-12TIN, the 70V9289L12PRF8 uniquely combines 3.3V-only operation, pipelined 12ns timing, and integrated address counter - making it optimal for high-speed, self-synchronizing data pipelines where power, pin count, and timing predictability are jointly constrained.

Availability

70V9289L12PRF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial PLCs, medical imaging subsystems, and real-time DSP modules requiring stable component supply across extended product lifecycles.

Supply support for 70V9289L12PRF8 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 ICs for communications, computing, and industrial markets.

The 70V9289L12PRF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, engineered specifically for deterministic, low-latency inter-processor and inter-subsystem data exchange in bandwidth-constrained real-time systems.

FAQ

What is the maximum operating frequency of the 70V9289L12PRF8 in pipelined mode?

The 70V9289L12PRF8 supports a maximum operating frequency of 83MHz in pipelined output mode, derived from its guaranteed 12ns clock cycle time (tCYC2). This timing is validated across the full industrial temperature range (–40°C to +85°C) and 3.3V ±0.3V supply, making it suitable for sustained high-throughput applications such as packet buffering and real-time signal processing where deterministic latency is essential. The 70V9289L12PRF8 achieves this without requiring external PLLs or clock doublers.

Does the 70V9289L12PRF8 support independent byte-enable control on both ports?

Yes, the 70V9289L12PRF8 provides fully independent upper-byte (UB/UBR) and lower-byte (LB/LBR) select controls for each port. These signals operate synchronously with the port clock and allow granular 9-bit or 8-bit writes to either half of the 18-bit data bus - critical for bus-matching with 16-bit microcontrollers or FPGAs and for minimizing write amplification in descriptor-based architectures. The 70V9289L12PRF8 maintains this capability in both pipelined and flow-through output modes.

How does the address counter function in the 70V9289L12PRF8, and what signals control it?

The 70V9289L12PRF8 integrates a programmable address counter per port, controlled by ADS (Address Strobe) and CNTEN (Counter Enable). When ADS = VIL, the external address is latched; when CNTEN = VIL on the rising CLK edge, the counter advances automatically. CNTRST resets the counter to address zero. This enables efficient burst transfers without continuous address bus updates - a feature leveraged in DMA engines and video frame buffers. The 70V9289L12PRF8 implements this entirely on-die with no external logic required.

Can the 70V9289L12PRF8 be used in depth-expanded configurations, and how is it implemented?

Yes, the 70V9289L12PRF8 supports depth expansion using its dual chip enable (CE0/CE1) architecture per port. By tying CE0 of one device to CE1 of the next (or using an external address bit like A16), multiple 70V9289L12PRF8 devices can be cascaded to form larger memory arrays without additional decoding logic. This is explicitly documented in the datasheet's "Depth and Width Expansion" section and validated for industrial temperature operation. The 70V9289L12PRF8's CE logic ensures seamless power-down of deselected banks to minimize standby current.

What is the power consumption profile of the 70V9289L12PRF8 in active and standby modes?

The 70V9289L12PRF8 draws 150mA typical (500mW) in active mode with both ports enabled and outputs disabled at 83MHz, and only 0.4mA typical (1.5mW) in full standby mode when both CE0 and CE1 are deasserted at CMOS levels. Its dual CE architecture allows partial standby - e.g., disabling one port while keeping the other active - drawing 90–130mA depending on configuration. All values are specified over the full –40°C to +85°C range and are production-tested per the 70V9289L12PRF8 datasheet revision DSC-4856/9.