Renesas 70V9289L7PFG8

Overview

70V9289L7PFG8 from Integrated Device Technology is a high-speed 3.3V synchronous dual-port static RAM with true dual-ported 64K × 18-bit memory architecture, 12 ns pipelined cycle time (83 MHz), 7.5 ns 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 and right ports in telecom switching fabric and real-time DSP co-processing systems.

For engineers reviewing the 70V9289L7PFG8 datasheet, 70V9289L7PFG8 pinout, 70V9289L7PFG8 application, or 70V9289L7PFG8 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 70V9289L7PFG8 implements fully synchronous dual-port operation with separate clock inputs (CLKL/CLKR), address strobe (ADSL/ADSR), and counter control (CNTENL/CNTRSTL, CNTENR/CNTRSTR) on each port. All inputs-including address, data, and control signals-register on the rising edge of their respective clocks with 4 ns setup and 0 ns hold times.

It supports two distinct output modes: pipelined (FT/PIPE = VIH, 7.5 ns tCD2, 12 ns tCYC2) and flow-through (FT/PIPE = VIL, 18 ns tCD1, 22 ns tCYC1), selectable per port via dedicated FT/PIPEL and FT/PIPER pins. Internal self-timed write eliminates external write-pulse generation.

Key Specifications

Pinout & Package

70V9289L7PFG8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14 mm × 20 mm × 1.4 mm, with 0.4 mm lead pitch and exposed thermal pad (not electrically connected). All VDD (pins 20, 48, 70, 91, 100, 122) and VSS (pins 19, 47, 69, 90, 99, 121) pins require local decoupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100AXC and IS61WV6418BLL-10MLI, the 70V9289L7PFG8 uniquely delivers per-port pipelined/flow-through selection, integrated address counter with reset, and dual chip enables - making it the only option for deterministic burst-buffering in telecom and real-time control systems.

Availability

70V9289L7PFG8 is available at Aetrix Electronics and suitable for telecom switching fabric, DSP co-processor buffering, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 70V9289L7PFG8 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 high-performance silicon solutions for communications, computing, and industrial markets.

The 70V9289L7PFG8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic, low-latency inter-processor communication and real-time data buffering in telecom infrastructure and embedded control systems.

FAQ

What is the maximum operating frequency of the 70V9289L7PFG8 in pipelined mode?

The 70V9289L7PFG8 achieves a 12 ns clock cycle time in pipelined output mode (FT/PIPE = VIH), supporting a maximum operating frequency of 83 MHz. This timing is guaranteed across the industrial temperature range (–40°C to +85°C) and 3.3 V ± 0.3 V supply, enabling sustained high-throughput data transfer in telecom and DSP applications without wait states.

Does the 70V9289L7PFG8 support independent output timing modes on left and right ports?

Yes, the 70V9289L7PFG8 supports fully independent output timing modes: FT/PIPEL configures the left port and FT/PIPER configures the right port. Each can be set to pipelined (VIH) or flow-through (VIL) mode, allowing one port to optimize for low latency (e.g., 7.5 ns tCD2) while the other maintains deterministic timing (e.g., 18 ns tCD1) - critical for mixed-interface systems.

How does the address counter function in the 70V9289L7PFG8, and what signals control it?

The 70V9289L7PFG8 includes a per-port address counter controlled by CNTENL/CNTENR (enable) and CNTRSTL/CNTRSTR (reset). When CNTEN = VIL on the rising clock edge, the counter advances automatically. ADSL/ADSR loads external addresses. The counter resets synchronously to address 0 on CNTRST assertion - enabling efficient burst transfers without external address generation logic in the 70V9289L7PFG8.

What power-saving features does the 70V9289L7PFG8 provide during inactive periods?

The 70V9289L7PFG8 provides multi-level power management: full standby draws just 0.4–2 mA (ISB3) when both ports are deselected with CMOS-level inputs; partial standby draws 90–130 mA (ISB2/ISB4) when one port is active; and automatic power-down occurs when CE0 = VIH or CE1 = VIL for one clock cycle - reducing active current to 1.5 mW typical standby power without external control.

Can the 70V9289L7PFG8 be used for depth expansion, and how is it implemented?

Yes, the 70V9289L7PFG8 supports seamless depth expansion using its dual chip enables (CE0/CE1). For example, two devices can be stacked using A16 to select CE0 on one device and CE1 on the other - no external decoding logic required. Truth Table I confirms that CE0 = VIH or CE1 = VIL places a port in power-down, enabling clean bank selection and minimizing inter-bank timing skew in the 70V9289L7PFG8-based memory subsystems.