Renesas 7024S17PFI8

Overview

7024S17PFI8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 17 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% supply, and industrial temperature range (–40°C to +85°C). It supports simultaneous asynchronous access, on-chip semaphore arbitration, and battery-backed data retention down to 2V - used in real-time embedded systems requiring deterministic dual-processor memory coherency.

For engineers reviewing the 7024S17PFI8 datasheet, 7024S17PFI8 pinout, 7024S17PFI8 application, or 7024S17PFI8 equivalent, key selection criteria include port arbitration latency, BUSY flag timing (tBAA ≤17 ns), byte-selectable I/O control (UBL/LBL), low-power standby (1 mW typ. for L-version), and 84-pin PLCC package compatibility with legacy military/industrial PCB layouts.

Technical Context

The 7024S17PFI8 implements full hardware port arbitration using dedicated BUSY and M/S pins: when configured as Master (M/S = H), it asserts BUSY output during internal contention; as Slave (M/S = L), it samples BUSY input to stall writes. Semaphore logic operates via SEM, INT, and address A0–A2 to manage eight shared flags across both ports without external logic.

Its dual-port architecture enables concurrent reads from identical addresses - critical for inter-processor communication in radar signal processors and avionics flight control units. The device uses CMOS process technology, supports separate upper- and lower-byte enables (UBL/LBL), and enters ultra-low-power standby (<1 mW) when both CE inputs are high and all inputs are at valid TTL levels.

Key Specifications

Pinout & Package

7024S17PFI8 is housed in an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84), body size ≈1.15 in × 1.15 in × 0.17 in, with gull-wing leads suitable for automated assembly and thermal cycling reliability in harsh environments.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and IDT70V24S17PF8, the 7024S17PFI8 uniquely delivers 5V TTL compatibility, hardware master/slave configuration (M/S pin), and industrial temperature rating in a legacy PLCC package - making it irreplaceable in fielded 5V avionics and industrial control upgrades where PCB redesign is prohibited.

Availability

7024S17PFI8 is available at Aetrix Electronics and suitable for radar signal processing, avionics flight control units, industrial PLC motion controllers, and military communications radios requiring stable component supply across extended product lifecycles.

Supply support for 7024S17PFI8 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

IDT (Integrated Device Technology) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions, acquired by Renesas Electronics in 2019.

The IDT7024 family was engineered for deterministic dual-processor memory coherency in safety-critical aerospace, defense, and industrial systems - prioritizing hardware arbitration, battery backup, and ruggedized packaging over density or speed scaling.

FAQ

What is the maximum operating frequency supported by the 7024S17PFI8?

The 7024S17PFI8 does not specify a clock frequency; it is an asynchronous SRAM. Its performance is defined by timing parameters - notably 17 ns maximum read cycle time (tRC), which corresponds to a theoretical maximum sustained throughput of approximately 58.8 million operations per second under ideal conditions. Actual system bandwidth depends on address/data setup/hold times and bus protocol overhead.

Does the 7024S17PFI8 support true simultaneous read operations from both ports to the same memory location?

Yes, the 7024S17PFI8 features true dual-ported memory cells that allow concurrent reads from identical addresses on the left and right ports without contention or arbitration delay. This capability is explicitly confirmed in the datasheet's "Features" section and enables lock-free data sharing in symmetric multiprocessing architectures.

How does the M/S pin affect BUSY signal behavior on the 7024S17PFI8?

When M/S = H, the 7024S17PFI8 operates as Master: BUSYR becomes an output that asserts during internal port contention. When M/S = L, it operates as Slave: BUSYL becomes an input that must be driven low by the Master to stall writes. This hardware-configured role eliminates need for external BUSY routing logic in cascaded configurations.

Can the 7024S17PFI8 retain data during main power loss, and what voltage is required?

Yes, the 7024S17PFI8 (L-version) supports battery backup data retention at VCC = 2.0 V minimum, drawing ≤4000 µA in retention mode. This is validated across the full industrial temperature range (–40°C to +85°C) and enables nonvolatile storage in black-box recorders and fail-safe controllers without external NVSRAM.

What package type is used for the 7024S17PFI8, and is it RoHS-compliant?

The 7024S17PFI8 uses an 84-pin Plastic Leaded Chip Carrier (PLCC, package code PLG84) with dimensions ≈1.15 in × 1.15 in × 0.17 in. Per IDT documentation, "Green parts available" indicates lead-free, RoHS-compliant construction - confirmed by the 'PFI8' suffix denoting Pb-free PLCC packaging per JEDEC standards.