Renesas 7024L15PFI

Overview

7024L15PFI from IDT is a high-speed 4K × 16 true dual-port static RAM with independent left/right ports, 15 ns max read cycle time (commercial grade), TTL-compatible 5V ±10% supply, and 2V data retention capability. It supports simultaneous asynchronous access to the same memory location and implements on-chip semaphore arbitration for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7024L15PFI datasheet, 7024L15PFI pinout, 7024L15PFI application, or 7024L15PFI equivalent, key selection considerations include its 15 ns access timing, low 1 µA standby current (L-version), Master/Slave BUSY flag signaling, full hardware semaphore support, and compatibility with 84-pin PLCC packaging for industrial temperature operation (–40°C to +85°C).

Technical Context

The 7024L15PFI implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling concurrent read/write operations without external arbitration logic. Its on-chip arbitration logic resolves port contention via BUSY flag assertion and supports semaphore flag exchange across ports using dedicated SEM, INT, and M/S signals.

It features battery backup operation down to 2V with guaranteed data retention, and integrates separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus interfacing. The L-version reduces standby power to 1 mW typical while maintaining identical AC timing to the S-version at 15 ns.

Key Specifications

Pinout & Package

7024L15PFI is packaged in an 84-pin Plastic Leaded Chip Carrier (PLCC), body size ≈ 1.15 in × 1.15 in × 0.17 in, with lead finish per JEDEC J-STD-020. Pin 1 marked by notch; pin numbering follows standard PLCC clockwise sequence starting from top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and AS7C34096B-15JCIN, the 7024L15PFI delivers unique value through integrated Master/Slave arbitration, hardware semaphore registers, and true concurrent access - reducing BOM count, PCB area, and firmware complexity in tightly coupled multi-CPU systems.

Availability

7024L15PFI is available at Aetrix Electronics and suitable for industrial automation, real-time control, and embedded communications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 7024L15PFI 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, now part of Renesas Electronics.

The 7024L15PFI belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in mission-critical embedded systems where hardware-enforced synchronization is mandatory.

FAQ

What is the maximum operating frequency supported by the 7024L15PFI?

The 7024L15PFI does not operate on a clock signal-it is a fully asynchronous static RAM. Its performance is defined by timing parameters: 15 ns maximum read cycle time (tRC) and 15 ns maximum address access time (tAA). These values set the upper bound for sustained random-access throughput, enabling up to ~66.7 million 16-bit words per second under ideal conditions. The 7024L15PFI achieves this without requiring clock distribution or setup/hold constraints typical of synchronous memories.

Does the 7024L15PFI support battery backup operation, and what voltage range is guaranteed for data retention?

Yes, the 7024L15PFI supports battery backup operation with guaranteed data retention down to 2.0 V (VDR = 2.0 V min). In retention mode, CE must be held high and all inputs biased to valid logic levels (V_HC or V_LC). The L-version draws only 0.2 µA typical ISB3 current at 2V, enabling multi-year backup from small coin cells. This feature is exclusive to the 'L' suffix variant and is verified across the full –40°C to +85°C industrial temperature range.

How does the Master/Slave (M/S) pin affect arbitration behavior in a multi-device configuration?

When M/S = HIGH, the 7024L15PFI operates as Master: BUSY is an output that asserts when the opposite port attempts conflicting access, blocking writes until resolution. When M/S = LOW, it operates as Slave: BUSY becomes an input monitored by the Master to detect contention. In cascaded systems, only one device should be configured as Master; all others must be Slaves. This eliminates external arbitration logic and ensures deterministic priority resolution without software intervention - a core capability of the 7024L15PFI.

Can the 7024L15PFI perform simultaneous read operations on both ports to the same memory address?

Yes, the 7024L15PFI uses true dual-port memory cells that allow completely independent, simultaneous reads from both ports-even to identical addresses-with no timing penalty or bus contention. This is confirmed in the Functional Block Diagram and explicitly stated in the Features section: "True Dual-Ported memory cells which allow simultaneous reads of the same memory location." No BUSY assertion or arbitration delay occurs during concurrent reads, making the 7024L15PFI ideal for mirrored data access in redundant architectures.

What package type and pin count does the 7024L15PFI use, and is it RoHS-compliant?

The 7024L15PFI uses an 84-pin Plastic Leaded Chip Carrier (PLCC) package, with body dimensions approximately 1.15 in × 1.15 in × 0.17 in. It is RoHS-compliant and qualifies as a "green part" per IDT's ordering information. The PLCC package offers robust thermal and mechanical performance for industrial reflow and wave soldering processes, and its surface-mount form factor supports high-density PCB layouts without through-hole constraints. Pin compatibility is maintained across all IDT7024 variants in this package.