Renesas 70V9389L7PRF

Overview

70V9389L7PRF from IDT (Integrated Device Technology) is a high-speed, 3.3V, 64K × 18/16-bit synchronous dual-port pipelined static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports. It supports pipelined output mode with 7.5 ns clock-to-data access, 12 ns cycle time at 83 MHz, and industrial temperature range (–40°C to +85°C). It is used in real-time digital signal processing systems requiring deterministic latency and concurrent data path arbitration.

For engineers reviewing the 70V9389L7PRF datasheet, 70V9389L7PRF pinout, 70V9389L7PRF application, or 70V9389L7PRF equivalent, key selection criteria include pipelined vs. flow-through timing modes, dual chip enable depth expansion capability, separate upper/lower byte controls for multiplexed bus compatibility, and low-power standby operation (1.5 mW typ.) under CE-driven power-down.

Technical Context

The 70V9389L7PRF implements fully synchronous operation on both ports with registered address, data, and control inputs - all latched on the rising edge of CLKL/CLKR. Its self-timed internal write pulse decouples write completion from clock edge timing, enabling fast cycle times independent of clock low/high asymmetry.

It features dual independent address counters (CNTENL/CNTRSTL and CNTENR/CNTRSTR), each controllable via dedicated strobe (ADSL/ADSR) and reset signals, supporting burst-addressing in pipelined or flow-through modes. Flow-through/pipelined output behavior is selected per port via FT/PIPEL and FT/PIPER pins, with corresponding timing parameters (tCD1/tCD2, tCYC1/tCYC2) strictly segregated by mode.

Key Specifications

Pinout & Package

70V9389L7PRF is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring approximately 14 mm × 20 mm × 1.4 mm. All VDD pins require connection to 3.3 V supply; all VSS pins must be grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-100AXC and IDT70V289L12PF, the 70V9389L7PRF uniquely integrates dual address counters and per-port flow-through/pipelined mode selection - reducing BOM count and PCB area in systems requiring burst-mode memory access without external sequencing logic.

Availability

70V9389L7PRF is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, avionics sensor fusion, and real-time DSP applications requiring stable component supply, long-term lifecycle support, and industrial-grade temperature performance.

Supply support for 70V9389L7PRF 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 computing solutions.

The 70V9389L7PRF belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for real-time embedded systems requiring deterministic latency, concurrent multi-master access, and industrial environmental resilience.

FAQ

What is the maximum operating frequency of the 70V9389L7PRF in pipelined mode?

The 70V9389L7PRF achieves a 12 ns clock cycle time in pipelined mode, supporting operation up to 83 MHz. This is confirmed in the AC Electrical Characteristics table (Table 11a) for the L7 speed grade under industrial temperature conditions. The 70V9389L7PRF does not support 100 MHz operation - that requires the faster L12 variant.

Does the 70V9389L7PRF support true simultaneous read and write to the same memory address?

Yes, the 70V9389L7PRF uses true dual-ported memory cells explicitly stated in its Features section, enabling concurrent read from one port and write to the same address on the other port without collision or arbitration delay - a defining characteristic validated in the Functional Block Diagram and Truth Table I.

How does the address counter function on the 70V9389L7PRF, and which pins control it?

The 70V9389L7PRF includes independent address counters for each port, controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTEN = VIL on the rising CLK edge, the counter advances; CNTRST = VIL resets it to address 0. ADSL/ADSR selects between external address loading or counter-based auto-increment - all detailed in Truth Table II and Figure 15.

What power-saving features does the 70V9389L7PRF offer, and how are they activated?

The 70V9389L7PRF offers automatic power-down via dual chip enables: asserting CE0 = VIH or CE1 = VIL places the respective port in low-power standby (1.5 mW typ.). This is documented in the Features list and DC Electrical Characteristics (Table 9a), where ISB3 shows full standby current of 0.4 mA typ. No external circuitry is needed - activation is purely logic-level driven.

Is the 70V9389L7PRF pin-compatible with other members of the IDT70V9389/289 family, such as the 70V9289L7PRF?

No, the 70V9389L7PRF is not pin-compatible with the 70V9289L7PRF. Although both share the same 128-pin TQFP package and core functionality, the 70V9289L7PRF supports only 64K × 16-bit organization and maps I/O0–I/O15 differently - I/O16/I/O17 are NC on the 70V9289L7PRF but functional on the 70V9389L7PRF, as shown in Pin Configuration diagrams (Figures 02 and 02b).