Renesas 70V27L15PF

Overview

70V27L15PF from Integrated Device Technology (IDT) is a high-speed, low-power 32K × 16 dual-port static RAM with true simultaneous access capability, 15 ns maximum access time, 3.3 V single-supply operation, and integrated on-chip arbitration logic for inter-port synchronization. It serves as a stand-alone or master/slave-configured memory buffer in real-time embedded systems requiring deterministic data exchange between independent processors or bus domains.

For engineers reviewing the 70V27L15PF datasheet, 70V27L15PF pinout, 70V27L15PF application, or 70V27L15PF equivalent, key selection criteria include its 15 ns industrial-grade access timing, 660 µW standby power, full hardware semaphore support, and 100-pin TQFP package with separate byte enables and BUSY/INT flags for lock-free multi-processor communication.

Technical Context

The 70V27L15PF implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses-enabling concurrent read/write operations to the same memory location without external arbitration logic. Its on-chip port arbitration uses address-match and chip-enable priority detection to assert BUSY flags, while dedicated SEM pins enable hardware semaphore signaling across ports using A0–A2 addressing.

It supports MASTER/SLAVE cascading via M/S pin for 32-bit+ data width expansion, with BUSY acting as output (M/S = VIH) or input (M/S = VIL), and includes full LVTTL-compatible 3.3 V I/O with separate upper/lower byte controls (UBL/LBL, UBR/LBR) for flexible bus interfacing and partial-word writes.

Key Specifications

Pinout & Package

70V27L15PF is housed in a 100-pin TQFP (PN100-1) package with 0.5 mm pitch, 14 mm × 14 mm body, and 1.4 mm height. All VDD pins require local 3.3 V decoupling; all VSS pins must be connected to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and AS7C3256A-15JCIN, the 70V27L15PF uniquely delivers 3.3 V operation with full hardware arbitration and semaphore support-reducing BOM count, eliminating timing-critical software locks, and enabling deterministic multi-core communication in industrial and automotive safety-critical systems.

Availability

70V27L15PF is available at Aetrix Electronics and suitable for industrial motion control, avionics display systems, and medical imaging equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for 70V27L15PF 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 IDT70V27 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems-emphasizing hardware-accelerated arbitration, ultra-low standby power, and seamless 32-bit bus expansion via MASTER/SLAVE topology.

FAQ

What is the maximum operating temperature range for the 70V27L15PF?

The 70V27L15PF is rated for industrial temperature operation from −40°C to +85°C. This specification is validated across all electrical parameters including 15 ns access time, 660 µW standby current, and full functionality of BUSY arbitration and semaphore logic-making it suitable for deployment in harsh environments such as factory automation controllers and vehicle under-hood modules.

Does the 70V27L15PF support true simultaneous access to the same memory location?

Yes, the 70V27L15PF features true dual-ported memory cells that permit simultaneous read and write operations to the identical address location. When contention occurs, on-chip arbitration asserts BUSY on the later-arriving port, ensuring data integrity without external logic-this behavior is confirmed in Truth Table V and Timing Waveform 14 of the official IDT datasheet for 70V27L15PF.

How does the M/S pin affect BUSY functionality on the 70V27L15PF?

When M/S = VIH, the 70V27L15PF operates as a Master: BUSYL and BUSYR are push-pull outputs asserting active-low busy signals during address contention. When M/S = VIL, it operates as a Slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a Master device-enabling hierarchical multi-device memory systems without additional control logic.

What power savings does the 70V27L15PF deliver in standby mode compared to the IDT70V27S variant?

The 70V27L15PF achieves 660 µW typical full standby current (ISB3), whereas the IDT70V27S variant consumes 3.3 mW in the same condition-a 5× reduction. This difference stems from optimized CMOS design in the 'L' (low-power) version, making the 70V27L15PF ideal for battery-backed or energy-constrained applications where memory retention must coexist with ultra-low quiescent power.

Can the 70V27L15PF be used to expand data bus width beyond 16 bits?

Yes, the 70V27L15PF supports data bus expansion to 32 bits or wider using its MASTER/SLAVE cascade capability. By connecting multiple devices with M/S configured appropriately and routing BUSY/INT signals between them, designers can construct synchronized wide-memory subsystems without external decoding or arbitration logic-explicitly documented in the IDT70V27L15PF functional description and pin configuration diagrams.