Renesas 7024S15PFI8

Overview

7024S15PFI8 from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 15 ns maximum read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and on-chip semaphore arbitration logic. It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 32-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7024S15PFI8 datasheet, 7024S15PFI8 pinout, 7024S15PFI8 application, or 7024S15PFI8 equivalent, key selection criteria include dual-port contention resolution timing (tBDD ≤ 30 ns), battery-backed data retention at 2V (IDT7024L variant), industrial temperature support (–40°C to +85°C), and compatibility with 84-pin PLCC packaging for legacy board designs.

Technical Context

The 7024S15PFI8 implements full hardware port arbitration with dedicated BUSY flag signaling (M/S = H for master output, M/S = L for slave input) and eight semaphore registers addressable via A0–A2. Its dual-port architecture permits concurrent read/write operations across independent address/data/control buses without external logic.

It features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus interfacing, interrupt flag generation (INTL/INTR), and automatic power-down via chip enable (CE) - reducing standby current to 5 mW (typ.) in IDT7024S configuration.

Key Specifications

Pinout & Package

84-pin PLCC package (PLG84), body size ≈ 29.2 mm × 29.2 mm × 4.3 mm, lead pitch 1.27 mm, RoHS-compliant plastic construction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1352BV18-167BZI and AS7C34098B-15JCIN, the 7024S15PFI8 uniquely delivers native 5V TTL dual-port operation with integrated BUSY arbitration and semaphore logic in legacy-compatible PLCC packaging - making it irreplaceable for maintaining existing industrial and avionics designs without PCB redesign.

Availability

7024S15PFI8 is available at Aetrix Electronics and suitable for real-time motion control, digital signal processing buffers, avionics data concentrators, and industrial PLC communication modules requiring stable component supply across extended product lifecycles.

Supply support for 7024S15PFI8 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, now part of Renesas Electronics.

The IDT7024 product line was engineered for deterministic, low-latency inter-processor communication in military, industrial, and aerospace systems - emphasizing hardware arbitration, dual-port concurrency, and ruggedized packaging.

FAQ

What is the maximum operating frequency supported by the 7024S15PFI8?

The 7024S15PFI8 has a 15 ns maximum read cycle time (tRC), supporting effective operation up to approximately 67 MHz per port under commercial conditions. This value is specified at VCC = 5.0 V ±10% and TA = 0°C to +70°C. The device operates fully asynchronously - no clock input is required - and timing compliance depends on meeting setup/hold windows for CE, OE, UB/LB, and address signals as defined in the AC characteristics tables.

Does the 7024S15PFI8 support battery backup for data retention?

No, the 7024S15PFI8 does not support battery backup data retention. That feature is exclusive to the IDT7024L variant (e.g., 7024L15PFI8), which specifies 2 V minimum VCC for data retention and 500 µW typical standby current from a 2 V source. The "S" suffix in 7024S15PFI8 denotes the standard-power version, with ISB1 = 20 mA max and no characterization for sub-4.5 V operation.

How does the BUSY signal function in master versus slave configuration for the 7024S15PFI8?

In master configuration (M/S = HIGH), BUSYL and BUSYR are outputs that assert when port contention occurs - e.g., simultaneous writes to the same address. In slave configuration (M/S = LOW), BUSYL and BUSYR become inputs; the device monitors the master's BUSY signal to delay its own write cycles. This hardware arbitration eliminates the need for software polling or external logic, and is validated in timing waveforms for port-to-port read with BUSY (Figure 2740 drw 13).

Can the 7024S15PFI8 be used in a 32-bit data bus system?

Yes, the 7024S15PFI8 supports 32-bit expansion via master/slave cascading. When two devices are connected with M/S = HIGH (master) and M/S = LOW (slave), the master's BUSY output drives the slave's BUSY input, enabling coordinated access. The datasheet confirms this topology allows "full-speed, error-free operation without additional discrete logic," and the IDT7024 easily expands data bus width to 32 bits or more using this method.

What package type is used for the 7024S15PFI8, and is it RoHS compliant?

The 7024S15PFI8 uses an 84-pin PLCC (plastic leaded chip carrier) package, designated PLG84 in IDT documentation, with dimensions approximately 29.2 mm × 29.2 mm × 4.3 mm. It is RoHS-compliant, as confirmed by IDT's green parts initiative referenced in the datasheet ("Green parts available, see ordering information") and consistent with Renesas' post-acquisition environmental compliance standards.