Renesas 7024S30J

Overview

7024S30J from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 30 ns max access time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous reads of the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time interprocessor communication systems.

For engineers reviewing the 7024S30J datasheet, 7024S30J pinout, 7024S30J application, or 7024S30J equivalent, key selection considerations include BUSY flag timing (tBAA ≤ 30 ns), dual-port arbitration latency, battery-backed data retention at 2V (L-version only), and compatibility with 84-pin PLCC/PGA/Flatpack or 100-pin TQFP footprints.

Technical Context

The 7024S30J implements full hardware port arbitration using dedicated BUSY and interrupt flags, with M/S pin selecting master (BUSY output) or slave (BUSY input) mode. Its dual-port architecture permits concurrent read/write operations across independent address/data/control buses without external logic.

It integrates full on-chip semaphore signaling-eight flags addressed via A0–A2-with dedicated SEM, SEML, SEMR pins and supports both RAM access (SEM = VIH) and semaphore access (SEM = VIL) under distinct enable conditions. The device operates fully asynchronously from either port with no clock required.

Key Specifications

Pinout & Package

7024S30J is packaged 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 and standard PLCC pin 1 index mark.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C133-35JC and IDT70V24S30PF, the 7024S30J uniquely delivers hardware semaphore arbitration and 5V TTL compatibility in PLCC packaging-enabling deterministic, glueless interprocessor communication without voltage translation or external logic.

Availability

7024S30J is available at Aetrix Electronics and suitable for real-time interprocessor communication, avionics data concentrators, redundant control systems, and digital signal processing subsystems requiring stable component supply across extended production lifecycles.

Supply support for 7024S30J 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, RF, and high-performance silicon solutions for communications, computing, and industrial markets.

The 7024S30J belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic, low-latency interprocessor communication in mission-critical embedded systems where hardware arbitration and 5V robustness are mandatory.

FAQ

What is the maximum access time specified for the 7024S30J?

The 7024S30J has a maximum access time of 30 ns under commercial operating conditions (0°C to +70°C, VCC = 5.0 V ±10%). This value corresponds to parameters tAA, tACE, tABE, and tAOE as defined in the AC Electrical Characteristics table for the X30 speed grade. It guarantees valid data at the outputs within 30 ns after address or control setup, enabling high-throughput data exchange between dual processors.

Does the 7024S30J support battery backup data retention?

No, the 7024S30J does not support battery backup data retention. That feature is exclusive to the 'L' version (e.g., 7024L30J), which specifies 2V data retention with ICCDR ≤ 4000 µA. The 'S' suffix denotes the standard power variant, with typical active power of 750 mW and standby of 5 mW at 5V-but no guaranteed retention below 4.5V. For battery-backed operation, the 7024L30J must be selected instead.

How does the M/S pin configure master versus slave operation in the 7024S30J?

The M/S pin on the 7024S30J configures port arbitration behavior: when driven high, the device operates as a master with BUSYL and BUSYR asserted as push-pull outputs indicating contention; when driven low, it operates as a slave with BUSYL and BUSYR functioning as inputs that must be driven by an external master. This enables cascaded configurations-for example, two 7024S30J devices can form a 32-bit wide memory where one is master and the other slave, eliminating external arbitration logic.

Can the 7024S30J perform simultaneous reads from both ports to the same memory address?

Yes, the 7024S30J uses true dual-port memory cells that permit simultaneous reads from both left and right ports to the exact same address location without contention, arbitration delay, or data corruption. This capability is fundamental to its architecture and requires no special timing or enable sequencing-both ports may assert valid addresses and enable signals concurrently, with valid data appearing on respective I/O buses within their specified access times (≤30 ns).

What package type is used for the 7024S30J, and are there thermal or mounting constraints?

The 7024S30J is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, designated PLG84, with dimensions approximately 1.15 in × 1.15 in × 0.17 in. It requires all VCC and GND pins to be connected per datasheet Note 1; thermal design must account for 750 mW typical active power dissipation, and the plastic body is rated for commercial temperature range (0°C to +70°C). Reflow profile must comply with JEDEC J-STD-020 for PLCC packages.