Renesas 7024S30J8

Overview

7024S30J8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent asynchronous left/right ports, 30 ns maximum read cycle time (tRC), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic - enabling simultaneous access to the same memory location in real-time digital signal processing and multiprocessing systems.

For engineers reviewing the 7024S30J8 datasheet, 7024S30J8 pinout, 7024S30J8 application, or 7024S30J8 equivalent, key selection considerations include BUSY flag timing (tBAA ≤ 30 ns), battery-backed data retention at 2V (IDT7024L variant), master/slave cascading capability, and 84-pin PLCC package compatibility with industrial temperature range (–40°C to +85°C).

Technical Context

The 7024S30J8 implements full hardware port arbitration with dedicated BUSY output (master) or input (slave), interrupt flag generation (INTL/INTR), and eight fully supported semaphore registers addressable via A0–A2. Its dual-port architecture permits concurrent read/write operations without external logic.

It supports byte-level control (UBL/UBR, LBL/LBR), separate chip enables per port (CEL/CER), and three power states: active (750 mW typ.), standby (5 mW typ. for S-version), and full standby (<0.2 mA). The device operates fully asynchronously - no clock required - and retains data down to 2V in low-power (L) variants.

Key Specifications

Pinout & Package

7024S30J8 is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC) with 0.050″ lead pitch and JEDEC MO-047A outline. Pin 1 is marked by a corner notch; body dimensions are approximately 1.15″ × 1.15″ × 0.17″.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-30AXC and AS7C34098B-30TIN, the 7024S30J8 delivers self-contained dual-port operation with hardware semaphore and BUSY signaling - reducing BOM count, PCB area, and firmware complexity in tightly coupled multiprocessing systems.

Availability

7024S30J8 is available at Aetrix Electronics and suitable for industrial automation, telecom infrastructure, and aerospace avionics requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for 7024S30J8 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 sensor solutions, now part of Renesas Electronics since 2019.

The IDT7024 family was engineered for high-reliability multiprocessing systems requiring deterministic memory access, hardware-based inter-processor synchronization, and seamless bus-width scalability - targeting military, industrial, and telecom applications.

FAQ

What is the maximum operating speed of the 7024S30J8?

The 7024S30J8 has a maximum read cycle time (tRC) of 30 ns, supporting sustained memory access rates up to 33.3 MHz per port. This specification is guaranteed over the full industrial temperature range (–40°C to +85°C) and 5.0 V ±10% supply voltage. The 30 ns rating applies to both read and write cycles under standard AC test conditions with TTL-level inputs and outputs.

Does the 7024S30J8 support battery backup data retention?

No, the 7024S30J8 does not support battery backup data retention. That feature is exclusive to the IDT7024L variant (e.g., 7024L30J8), which specifies 2 V minimum VCC for data retention. The "S" suffix in 7024S30J8 denotes the standard-power version with typical active current of 750 mW and standby current of 5 mW - optimized for performance rather than ultra-low-power retention.

How is port arbitration handled in the 7024S30J8?

The 7024S30J8 implements fully autonomous hardware port arbitration using dedicated BUSY flag signaling and on-chip logic. When both ports attempt simultaneous access to the same address, the BUSY output (on master configuration) asserts to block the lower-priority port. The M/S pin configures master/slave roles, and semaphore registers (accessed via SEM pins and A0–A2) provide additional software-coordinated resource locking - eliminating need for external arbitration circuitry.

Can the 7024S30J8 be used in a 32-bit data bus configuration?

Yes, the 7024S30J8 supports 32-bit bus expansion via master/slave cascading. Two devices can be connected with M/S = H (master) and M/S = L (slave); the master's BUSY output connects to the slave's BUSY input to coordinate access. IDT documentation confirms this configuration enables full-speed, error-free 32-bit word operation without additional discrete logic - a key design advantage over single-port alternatives.

What package type is used for the 7024S30J8?

The 7024S30J8 is supplied in an 84-pin Plastic Leaded Chip Carrier (PLCC) package, compliant with JEDEC MO-047A. It features a square body (approx. 1.15″ × 1.15″), gull-wing leads, and a corner notch for pin 1 identification. This package is RoHS-compliant, reflow-solderable, and widely supported in industrial PCB assembly processes - distinct from PGA, Flatpack, or TQFP variants offered in the broader IDT7024 family.