Renesas 70V9389L9PRF8

Overview

70V9389L9PRF8 from IDT (Integrated Device Technology) is a high-speed, 3.3V, synchronous dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address from left and right ports. It delivers 64K × 18-bit (or 64K × 16-bit) capacity, 15ns pipelined clock-to-data access, and supports industrial temperature range (–40°C to +85°C). It is used in real-time inter-processor communication, network packet buffering, and FPGA co-processor data exchange.

For engineers reviewing the 70V9389L9PRF8 datasheet, 70V9389L9PRF8 pinout, 70V9389L9PRF8 application, or 70V9389L9PRF8 equivalent, key selection criteria include pipelined vs. flow-through output mode selection via FT/PIPE pins, dual chip enable depth expansion capability, separate upper/lower byte controls for bus matching, and guaranteed 15ns cycle time in pipelined mode at industrial temperature.

Technical Context

The 70V9389L9PRF8 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 timing from clock edge transitions, enabling fast cycle times independent of clock duty cycle.

It features dual independent address counters (one per port), each controllable via dedicated CNTEN and CNTRST signals, and supports automatic address incrementing for burst transfers. The device provides asynchronous OE for flexible bus interfacing and dual CE0/CE1 enables allowing selective port power-down without external logic.

Key Specifications

Pinout & Package

70V9389L9PRF8 is housed in a 128-pin Thin Quad Flatpack (TQFP) package measuring 14mm × 20mm × 1.4mm, with 32 VDD and 32 VSS pins distributed across the perimeter for robust power integrity and noise suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-15ZXI and AS7C362000B-15TIN, the 70V9389L9PRF8 uniquely combines 64K depth, dual output modes, and integrated address counters - making it optimal for systems requiring flexible burst access, mixed-latency requirements, and industrial temperature reliability.

Availability

70V9389L9PRF8 is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motion control, FPGA co-processing, and digital signal processing applications requiring stable component supply and long-term industrial-grade availability.

Supply support for 70V9389L9PRF8 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, computing, and industrial markets.

The 70V9389L9PRF8 belongs to IDT's high-speed synchronous dual-port SRAM product line, designed specifically for deterministic-latency, real-time inter-processor and ASIC-FPGA bridging applications demanding concurrent access and industrial environmental resilience.

FAQ

What is the maximum operating frequency of the 70V9389L9PRF8 in pipelined mode?

The 70V9389L9PRF8 supports a maximum clock frequency of 66.7MHz in pipelined output mode, corresponding to a 15ns clock cycle time as specified in the AC Electrical Characteristics table. This timing is guaranteed over the full industrial temperature range (–40°C to +85°C) and 3.3V ±0.3V supply, making the 70V9389L9PRF8 suitable for high-throughput embedded systems requiring deterministic latency.

Does the 70V9389L9PRF8 support both flow-through and pipelined output modes simultaneously?

Yes, the 70V9389L9PRF8 supports independent configuration of output mode per port: FT/PIPEL controls the left port and FT/PIPER controls the right port. This allows the left port to operate in flow-through mode (25ns cycle, zero-latency output) while the right port runs in pipelined mode (15ns cycle, one-cycle latency), enabling heterogeneous timing requirements within a single device.

How does the address counter function in the 70V9389L9PRF8, and what signals control it?

The 70V9389L9PRF8 integrates two independent address counters-one per port-controlled by CNTENL/CNTRSTL (left) and CNTENR/CNTRSTR (right). When CNTEN = low on a rising CLK edge, the counter advances; CNTRST = low resets it to address 0. ADS input determines whether external address or counter output is latched, enabling seamless transition between random and sequential access without CPU intervention.

What power-saving features does the 70V9389L9PRF8 offer, and how are they activated?

The 70V9389L9PRF8 offers multi-level power management: full standby (0.4mA) is achieved when both CE0 and CE1 are driven high on a port; partial standby (100mA typ.) occurs when one CE is low and the other high. These states are controlled entirely by CE0/CE1 logic levels-no command sequence or register programming is required, simplifying low-power design in battery-backed or thermally constrained systems.

Can the 70V9389L9PRF8 be used for depth expansion, and what is required to implement it?

Yes, the 70V9389L9PRF8 supports depth expansion using its dual CE0/CE1 inputs per port without external logic. For two-device expansion, connect A16 to CE0 of the second device and tie its CE1 high; the first device uses CE0 low/CE1 high. This leverages Truth Table I behavior where CE0=low + CE1=high enables the port, enabling seamless 128K × 18-bit expansion with identical timing and control signaling.