Renesas 70V24L15PFGI8

Overview

70V24L15PFGI8 from IDT (Integrated Device Technology) is an industrial-grade, 4K x 16-bit true dual-port static RAM with independent left/right asynchronous ports, 15 ns read cycle time, 3.3 V single-supply operation, and integrated semaphore arbitration logic - used in real-time inter-processor communication systems such as radar signal processors and avionics data concentrators.

For engineers reviewing the 70V24L15PFGI8 datasheet, 70V24L15PFGI8 pinout, 70V24L15PFGI8 application, or 70V24L15PFGI8 equivalent, this page delivers verified electrical specs, validated PLCC-84 pin mapping, industrial temperature support (–40°C to +85°C), low-power standby (660 µW typ.), and two confirmed drop-in alternatives for memory subsystem redesigns.

Technical Context

The 70V24L15PFGI8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write access to the same memory location without contention. It integrates on-chip port arbitration, BUSY flag signaling, and eight hardware semaphores addressed via A0–A2 for deterministic inter-core synchronization.

It supports MASTER/SLAVE cascading for wider bus expansion (e.g., 32-bit systems), uses LVTTL-compatible inputs/outputs, and features automatic power-down via CE-controlled standby mode. The device operates exclusively at 3.3 V ±0.3 V and is rated for industrial temperature range only - no commercial-grade variant exists for this speed grade.

Key Specifications

Pinout & Package

70V24L15PFGI8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84), with dimensions approximately 1.15 in × 1.15 in × 0.17 in. All VDD pins must be decoupled locally; all VSS pins require low-inductance ground connections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and IDT70V24L25PFGI8, the 70V24L15PFGI8 uniquely delivers 15 ns performance in the rugged PLCC-84 package with integrated BUSY signaling - making it irreplaceable in legacy through-hole systems requiring deterministic inter-processor handshaking.

Availability

70V24L15PFGI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics data concentration, and industrial PLC backplane applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature compliance.

Supply support for 70V24L15PFGI8 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 engineered for deterministic, low-latency inter-processor communication in safety-critical embedded systems - emphasizing hardware arbitration, industrial reliability, and seamless integration with FPGA and ASIC-based architectures.

FAQ

What is the maximum operating frequency supported by the 70V24L15PFGI8?

The 70V24L15PFGI8 supports a maximum read cycle time (tRC) of 15 ns, corresponding to a theoretical maximum operating frequency of 66.7 MHz per port under ideal conditions. This assumes proper signal integrity, matched trace lengths, and adherence to AC timing parameters including tACE, tAOE, and tABE - all specified at ≤15 ns for this speed grade. The device does not include internal clock circuitry and relies on external control timing.

Does the 70V24L15PFGI8 support MASTER/SLAVE configuration, and how is it implemented?

Yes, the 70V24L15PFGI8 supports MASTER/SLAVE cascading via the M/S pin: when M/S = VIH, BUSY is driven as an output indicating port contention; when M/S = VIL, BUSY is an input accepting the BUSY signal from a MASTER device. This enables synchronized access across multiple 70V24L15PFGI8 devices to build wider memory interfaces (e.g., 32-bit) without external arbitration logic.

What is the function of the semaphore feature in the 70V24L15PFGI8, and how is it accessed?

The 70V24L15PFGI8 includes eight hardware semaphore flags accessible via I/O0–I/O15 using address lines A0–A2. Semaphores are enabled by asserting SEML/SEMR low while keeping UB/LB high and CE high. A write to I/O0 sets the flag; a read returns its state across all I/O pins. This provides atomic lock/unlock capability essential for safe multi-processor resource sharing without software polling overhead.

Can the 70V24L15PFGI8 operate with a 2.5 V supply voltage?

No, the 70V24L15PFGI8 is strictly a 3.3 V device with absolute maximum ratings specifying VDD between 3.0 V and 3.6 V. Operation below 3.0 V is not characterized and may result in undefined behavior, increased access time, or failure to meet timing specifications. It is incompatible with 2.5 V or 1.8 V I/O domains without level translation.

Is the 70V24L15PFGI8 pin-compatible with other members of the IDT70V24 family?

The 70V24L15PFGI8 shares identical pinout and package (PLG84) with all IDT70V24 variants including 70V24L25PFGI8 and 70V24S15PFGI8. Differences are limited to speed grade (15 ns vs. 25 ns) and power profile (L = low-power, S = standard). A 70V24L15PFGI8 can directly replace any 70V24x15PFGI8 variant; however, substituting a 25 ns part requires design validation for timing margins.