Renesas 70V24L15PFG8

Overview

70V24L15PFG8 from Integrated Device Technology (IDT) 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 bridges and FPGA co-processor memory buffers.

For engineers reviewing the 70V24L15PFG8 datasheet, 70V24L15PFG8 pinout, 70V24L15PFG8 application, or 70V24L15PFG8 equivalent, key selection criteria include its 84-pin PLCC package, 15 ns access timing at -40°C to +85°C, low 660 µW standby power, and hardware-supported semaphore flag management for deterministic port contention resolution.

Technical Context

This device implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling simultaneous read/write operations to the same memory location without external arbitration logic. It supports MASTER/SLAVE cascading via M/S pin to expand data width beyond 16 bits using BUSY flag handshaking.

On-chip semaphore logic uses A0–A2 addressing to manage eight shared flags accessible through I/O0–I/O15, with dedicated SEM, UB/LB, and INT pins per port. All timing parameters-including tAA (15 ns), tACE (15 ns), and tAOE (10 ns)-are specified over the full industrial temperature range (-40°C to +85°C) under 3.3 V ±0.3 V supply.

Key Specifications

Pinout & Package

84-pin Plastic Leaded Chip Carrier (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, with 4 corner leads designated as ground (VSS) and 4 as power (VDD); A12L and A12R are no-connect (NC) pins per datasheet note #1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1362BV33-15ZXI and IDT70V25L15PF, the 70V24L15PFG8 uniquely delivers industrial-grade 84-pin PLCC packaging with hardware BUSY arbitration and verified 15 ns performance across -40°C to +85°C - making it the sole option for legacy-replacement or through-hole constrained dual-processor interconnects.

Availability

70V24L15PFG8 is available at Aetrix Electronics and suitable for industrial motor control, FPGA data buffering, PLC communication bridging, and redundant safety controller applications requiring stable component supply and long-term lifecycle support.

Supply support for 70V24L15PFG8 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 signal conditioning ICs for communications, computing, and industrial markets.

The IDT70V24 product line delivers high-speed, low-power dual-port SRAMs optimized for deterministic inter-processor communication in real-time embedded systems - with emphasis on industrial temperature operation, hardware arbitration, and pin-compatible scalability.

FAQ

What is the maximum operating frequency supported by the 70V24L15PFG8?

The 70V24L15PFG8 does not operate at a fixed clock frequency but supports asynchronous operation with a 15 ns read cycle time (tRC), enabling effective data throughput up to approximately 66.7 MHz in burst-read configurations. Its timing is defined by access parameters (tAA, tACE, tAOE), not a system clock - making it suitable for glueless interfacing with microcontrollers, FPGAs, and DSPs without synchronous clock domain constraints. The 70V24L15PFG8 maintains this performance across the full -40°C to +85°C industrial temperature range.

Does the 70V24L15PFG8 support true simultaneous read/write operations to the same memory address?

Yes, the 70V24L15PFG8 implements true dual-port SRAM cells that allow concurrent read and write operations to the exact same memory location - one port reading while the other writes - without data corruption or bus contention. This behavior is guaranteed by the physical cell design and is independent of external arbitration. The 70V24L15PFG8 datasheet explicitly confirms "True Dual-Ported memory cells which allow simultaneous reads of the same memory location", and the architecture supports simultaneous R/W via independent left/right control paths.

How is semaphore functionality implemented in the 70V24L15PFG8?

The 70V24L15PFG8 integrates eight hardware semaphore flags accessible via A0–A2 address lines and controlled by the SEM pin. When SEM = VIL and CE = VIH (or UB & LB = VIH), the device enters semaphore mode: writing to I/O0 sets the selected flag, and reading any I/Ox returns the flag value. The 70V24L15PFG8 provides tSWRD (5 ns) and tSPS (5 ns) timing guarantees for flag write-to-read and contention window resolution - ensuring deterministic multi-processor synchronization without software polling.

What is the function of the M/S pin on the 70V24L15PFG8?

The M/S (Master/Slave Select) pin on the 70V24L15PFG8 configures the direction of the BUSY signal: when M/S = VIH, the left port operates as MASTER and asserts BUSYL as an output; when M/S = VIL, the left port becomes SLAVE and accepts BUSYR as an input. This enables daisy-chained MASTER/SLAVE configurations for expanding data bus width beyond 16 bits - for example, two 70V24L15PFG8 devices can form a 4K × 32-bit memory with automatic busy-flag handshaking between ports.

Is the 70V24L15PFG8 RoHS compliant and lead-free?

Yes, the 70V24L15PFG8 is a green-part variant as confirmed in the IDT datasheet (DSC-5624/10, October 2019), meeting RoHS Directive 2011/65/EU requirements. Its PLG84 package uses lead-free matte tin plating, and the device carries the "G" suffix in ordering information to denote compliance. The 70V24L15PFG8 is rated for reflow soldering per JEDEC J-STD-020, with peak temperature tolerance up to 260°C - consistent with standard lead-free assembly processes.