Renesas 7024L17J

Overview

7024L17J from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 17 ns maximum read cycle time (commercial grade), 2V data retention capability, and full on-chip semaphore arbitration logic-designed for real-time inter-processor communication in embedded control systems.

For engineers reviewing the 7024L17J datasheet, 7024L17J pinout, 7024L17J application, or 7024L17J equivalent, this page delivers verified timing specs, master/slave BUSY flag behavior, byte-select control semantics, and industrial-grade thermal validation for deterministic dual-port memory integration.

Technical Context

The 7024L17J implements fully asynchronous dual-port access with separate address, control, and I/O buses per port, enabling simultaneous reads from identical memory locations without contention. Its on-chip arbitration logic resolves port conflicts via hardware semaphore flags addressed by A0–A2 and controlled by SEM/UB/LB signals.

It supports MASTER/SLAVE cascading via M/S pin: when M/S = H, BUSY is an output flag indicating internal arbitration delay; when M/S = L, BUSY serves as input to stall the slave port during master write cycles. Battery backup operation at 2V retains data with ≤5 µA standby current.

Key Specifications

Pinout & Package

7024L17J is packaged in a 100-pin TQFP (PNG100) measuring 14 mm × 14 mm × 1.4 mm, with exposed thermal pad and standard 0.5 mm pitch. All VCC and GND pins require proper decoupling per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15JC and IDT70V24L17PF, the 7024L17J uniquely delivers 16-bit width, integrated semaphores, and 5V TTL compatibility in a single 100-pin TQFP-reducing BOM count and eliminating external arbitration logic in legacy industrial control systems.

Availability

7024L17J is available at Aetrix Electronics and suitable for industrial PLC communication, avionics data bus interface, and medical imaging frame buffer applications requiring stable component supply across extended product lifecycles.

Supply support for 7024L17J 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 high-performance timing, memory, and interface solutions for communications, computing, and industrial markets.

The 7024L17J belongs to IDT's legacy dual-port SRAM product line, engineered for deterministic real-time inter-processor communication in mission-critical embedded systems with strict timing and reliability requirements.

FAQ

What is the maximum operating temperature range for the 7024L17J?

The 7024L17J is specified for commercial temperature operation from 0°C to +70°C. It is not rated for industrial (–40°C to +85°C) or military ranges-those variants use different suffixes (e.g., 7024L17JI for industrial). Always verify ambient conditions against this rating to ensure timing and retention compliance.

Does the 7024L17J support true simultaneous read operations from both ports to the same memory address?

Yes, the 7024L17J uses true dual-port SRAM cells that allow concurrent reads from identical addresses on left and right ports without contention or data corruption. This is confirmed in the Functional Block Diagram and "True Dual-Ported memory cells" feature statement in the datasheet.

How does the BUSY signal function in master versus slave configuration for the 7024L17J?

When M/S = H (master), BUSYR is an output flag asserting during internal arbitration; when M/S = L (slave), BUSYL is an input that must be monitored to stall writes until BUSYR deasserts. This behavior is explicitly defined in Note 1 of the Pin Names table and Truth Table I.

What is the purpose of the SEM pin on the 7024L17J, and how is it used?

The SEM (Semaphore Enable) pin activates the on-chip 8-bit semaphore register. When SEM = L and CE/UB/LB are high, A0–A2 select one of eight flags for atomic read/write-enabling hardware-based resource locking between ports without software overhead or external logic.

Can the 7024L17J retain data at 2.0 V, and what is the typical current draw in that mode?

Yes, the 7024L17J guarantees data retention at VCC = 2.0 V. In full standby (ISB3 mode), typical current is 0.2 µA-verified in Table 9a under "7024L" column and "Full Standby Current" row, confirming suitability for battery-backed hold applications.