Renesas 7024S35PF

Overview

7024S35PF from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 35 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic-used in real-time embedded systems requiring concurrent memory access, such as digital signal processors interfacing with host controllers.

For engineers reviewing the 7024S35PF datasheet, 7024S35PF pinout, 7024S35PF application, or 7024S35PF equivalent, key selection criteria include dual-port arbitration timing (tBDD ≤ 35 ns), battery-backed data retention at 2V (IDT7024L variant), and Master/Slave cascading support for 32-bit bus expansion without external logic.

Technical Context

The 7024S35PF implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port, enabling simultaneous reads from the same memory location. Its on-chip arbitration logic resolves contention via BUSY flag signaling and supports semaphore flag exchange across ports using A0–A2 addressing.

It features dedicated upper-byte (UBR/UBL) and lower-byte (LBR/LBL) enables for multiplexed bus compatibility, and supports both R/W-controlled and CE/UB/LB-controlled write cycles. The device enters low-power standby (ISB3 ≤ 0.2 mA typ.) when chip enables are deasserted and inputs held at CMOS levels.

Key Specifications

Pinout & Package

7024S35PF is packaged in a 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green-part qualified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-35AXC and AS7C34096B-35PCN, the 7024S35PF uniquely integrates Master/Slave arbitration, semaphore registers, and 5V TTL compatibility-enabling drop-in replacement in legacy 5V dual-processor systems without redesigning control logic.

Availability

7024S35PF is available at Aetrix Electronics and suitable for DSP subsystems, avionics data buffers, and industrial motion controllers requiring stable component supply across extended production lifecycles.

Supply support for 7024S35PF 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 designed for high-reliability embedded systems requiring deterministic, contention-free memory sharing between heterogeneous processors-targeting aerospace, defense, and industrial automation markets.

FAQ

What is the maximum operating frequency supported by the 7024S35PF?

The 7024S35PF does not operate at a fixed clock frequency but supports asynchronous operation with a maximum read cycle time (tRC) of 35 ns. This corresponds to a theoretical maximum sustained access rate of approximately 28.6 MHz per port under ideal conditions. Actual system throughput depends on address/data setup/hold timing and bus protocol overhead-not a synchronous clock domain.

Does the 7024S35PF support battery backup for data retention?

No-the 7024S35PF is the "S" (standard power) version and does not support battery backup. Data retention at 2V is specified only for the "L" (low-power) variant (e.g., 7024L35PF). The 7024S35PF requires continuous 5V supply for volatile operation; removing VCC results in immediate data loss.

How does the Master/Slave configuration work on the 7024S35PF?

When M/S = HIGH, the 7024S35PF operates as Master: BUSYR and BUSYL are outputs that assert during address contention. When M/S = LOW, it operates as Slave: BUSYR and BUSYL become inputs, allowing external arbitration from a Master device. Cascading multiple units enables 32-bit+ word systems without external logic.

Can the 7024S35PF perform simultaneous read and write operations on the same memory location?

Yes-true dual-port architecture allows simultaneous reads from the same address on both ports. However, simultaneous write-to-read or write-to-write on the same location triggers BUSY arbitration. The winning port completes its operation; the losing port's BUSY input (if Slave) or output (if Master) signals the conflict, preventing data corruption.

What package type is used for the 7024S35PF, and is it RoHS compliant?

The 7024S35PF uses a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm lead pitch and 14 mm × 14 mm body. It is RoHS-compliant and qualifies as a green part per IDT's ordering information-containing no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.