Renesas 70V24L15PF8

Overview

70V24L15PF8 from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 15 ns maximum read cycle time, 3.3 V single-supply operation, and industrial temperature range (–40°C to +85°C). It integrates on-chip semaphore logic, BUSY/INT flags, and master/slave arbitration for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 70V24L15PF8 datasheet, 70V24L15PF8 pinout, 70V24L15PF8 application, or 70V24L15PF8 equivalent, this device is selected for deterministic low-latency memory sharing between two independent bus masters-especially where simultaneous access, hardware semaphore coordination, and power-constrained industrial operation are required.

Technical Context

The 70V24L15PF8 implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations-even to the same memory location-without external arbitration logic. Its on-chip port arbitration resolves contention via BUSY flag signaling and supports MASTER/SLAVE cascading for wider data bus expansion.

It features dedicated semaphore registers (A0–A2 addressed, 8 flags), full LVTTL-compatible I/Os, and automatic power-down via chip enable (CE). The device uses CMOS process technology and operates at 3.3 V ±0.3 V, with typical active power of 400 mW and standby current as low as 660 µA under TTL-level inputs.

Key Specifications

Pinout & Package

70V24L15PF8 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 require local 3.3 V decoupling; all VSS pins must be solidly grounded.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-15ZXI and IDT70V25L15PF8, the 70V24L15PF8 offers identical performance and PLCC packaging optimized for through-hole reliability and serviceability, while its industrial-only rating simplifies qualification for harsh-environment applications without commercial-grade overhead.

Availability

70V24L15PF8 is available at Aetrix Electronics and suitable for industrial PLCs, dual-core DSP subsystems, motor drive controllers, and avionics data acquisition modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 70V24L15PF8 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 sensor solutions for communications, computing, and industrial markets.

The IDT70V24 family delivers high-speed, low-power dual-port SRAMs designed specifically for real-time inter-processor communication in deterministic embedded systems-emphasizing hardware arbitration, semaphore support, and industrial reliability.

FAQ

What is the maximum operating frequency supported by the 70V24L15PF8?

The 70V24L15PF8 has a 15 ns maximum read cycle time (tRC), supporting up to 67 MHz effective bus operation when interfaced with controllers meeting setup/hold timing. Its fully asynchronous design means no internal clock is required-the limiting factor is external signal propagation and timing margin compliance, not an internal oscillator.

Does the 70V24L15PF8 support simultaneous read and write operations to the same memory address?

Yes, the 70V24L15PF8 implements true dual-port SRAM cells that allow simultaneous read and write operations to the same address location-one port reading while the other writes. The BUSY flag signals contention only when both ports attempt writes to the same location, ensuring deterministic resolution.

How is semaphore functionality implemented in the 70V24L15PF8?

The 70V24L15PF8 includes eight dedicated hardware semaphore flags accessed via A0–A2 address lines and controlled by the SEML/SEMR pins. When SEM is low, I/O0 writes to or reads from the selected flag; all I/O pins reflect the flag value during read cycles, enabling atomic inter-port synchronization without software intervention.

What is the role of the M/S pin on the 70V24L15PF8?

The M/S (Master/Slave Select) pin configures port behavior: when driven high (VIH), the device operates as MASTER and drives BUSY as an output; when driven low (VIL), it operates as SLAVE and accepts BUSY as an input. This enables daisy-chained arbitration in multi-device memory systems without external logic.

Is the 70V24L15PF8 pin-compatible with other members of the IDT70V24/25 family?

Yes-the 70V24L15PF8 shares identical 84-pin PLCC pinout and signal mapping with IDT70V24S15PF8 and IDT70V25L15PF8. Differences are limited to speed grade (S vs. L) and temperature grade (industrial-only vs. commercial/industrial), making it a drop-in replacement within the same package variant.