Renesas 70V24L20PFGI8

Overview

70V24L20PFGI8 from IDT (Integrated Device Technology) is an industrial-grade, 4K x 16-bit true dual-port static RAM with independent left/right asynchronous ports, 20 ns maximum access time, 3.3 V single supply, and 660 µW typical standby power. It supports on-chip semaphore arbitration and BUSY flag signaling for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 70V24L20PFGI8 datasheet, 70V24L20PFGI8 pinout, 70V24L20PFGI8 application, or 70V24L20PFGI8 equivalent, key selection criteria include dual-port timing compatibility, PLCC-84 package footprint, industrial temperature range (–40°C to +85°C), and semaphore coherency support in multi-CPU architectures.

Technical Context

This device implements fully asynchronous dual-port SRAM architecture with separate address, data, and control buses per port. It integrates hardware semaphore logic accessible via A0–A2 and I/O0, enabling atomic read-modify-write operations across ports without external logic.

Port arbitration uses dedicated BUSY output (Master) / BUSY input (Slave) and INT flag signals, with M/S pin configuration determining master/slave role in cascaded configurations. The device operates exclusively at 3.3 V ±0.3 V and requires no external voltage translation for LVTTL-compatible interfacing.

Key Specifications

Pinout & Package

84-pin Plastic Leaded Chip Carrier (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in. 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 CY7C024AV-20AXC and IDT70V25L20PF, the 70V24L20PFGI8 uniquely delivers industrial-temperature-rated dual-port operation in a legacy-friendly 84-pin PLCC package with built-in BUSY/INT signaling-critical for retrofitting or space-constrained avionics and medical designs.

Availability

70V24L20PFGI8 is available at Aetrix Electronics and suitable for industrial PLC communication buffers, dual-core DSP shared memory, avionics data loggers, and medical imaging control subsystems requiring stable component supply across extended product lifecycles.

Supply support for 70V24L20PFGI8 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 IDT70V24 family was designed specifically for real-time, multi-processor embedded systems requiring deterministic, contention-free memory sharing-targeting industrial automation, aerospace, and medical equipment where reliability and timing predictability are paramount.

FAQ

What is the maximum operating temperature range for the 70V24L20PFGI8?

The 70V24L20PFGI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is guaranteed across all electrical parameters in the datasheet, including 20 ns access time and 660 µW standby power, making it suitable for harsh-environment applications such as factory automation controllers and vehicle-mounted systems.

Does the 70V24L20PFGI8 support true simultaneous read operations on both ports?

Yes, the 70V24L20PFGI8 implements true dual-port SRAM cells that permit simultaneous reads from the same memory location on left and right ports without contention or delay. This capability is intrinsic to its architecture and does not require external arbitration-enabling deterministic behavior in tightly coupled multi-processor systems using the 70V24L20PFGI8.

How is semaphore functionality implemented in the 70V24L20PFGI8?

The 70V24L20PFGI8 provides eight hardware semaphore flags accessed via address lines A0–A2 and data line I/O0. When SEM is asserted low and CE/UB/LB are high, the device enters semaphore mode-allowing atomic read-modify-write operations. This eliminates race conditions between processors sharing resources, a core feature confirmed in the 70V24L20PFGI8 functional block diagram and truth tables.

What package type is used for the 70V24L20PFGI8, and are there any special layout considerations?

The 70V24L20PFGI8 uses an 84-pin PLCC (PLG84) package with approximate dimensions of 1.15 in × 1.15 in × 0.17 in. Layout requires connection of all VDD and VSS pins to appropriate power/ground planes, placement of 0.1 µF ceramic decoupling capacitors near each VDD pin, and adherence to controlled-impedance routing for address/data buses to maintain 20 ns timing integrity.

Can the 70V24L20PFGI8 be used in a master/slave configuration with other dual-port RAMs?

Yes, the 70V24L20PFGI8 supports master/slave cascading via the M/S pin: when set high, BUSYL becomes an output flag indicating port contention; when set low, BUSYR functions as an input to detect contention from a master device. This enables scalable memory expansion to 32-bit or wider data paths without external logic-explicitly documented in the 70V24L20PFGI8 pin configuration and functional description.