Renesas 7005L15PF

Overview

7005L15PF from IDT is a high-speed 8K × 8 (64 Kbit) true dual-port static RAM with independent left/right ports, 15 ns max read cycle time (commercial grade), 5 V ±10% single supply, and integrated hardware semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the 7005L15PF datasheet, 7005L15PF pinout, 7005L15PF application, or 7005L15PF equivalent, this page delivers verified electrical specs, master/slave port arbitration behavior, BUSY/INT timing constraints, low-power standby operation (1 µA typ), and TQFP-64 package compatibility for deterministic multi-CPU memory sharing.

Technical Context

The 7005L15PF implements fully asynchronous dual-port access with separate address, data, and control buses per port (A0L–A12L/I/O0L–I/O7L/R/WL/CEL/OEL on left; A0R–A12R/I/O0R–I/O7R/R/WR/CER/OER on right), enabling simultaneous reads-even to the same location-without contention. Its on-chip arbitration logic uses BUSY flags and M/S select to manage port priority during write conflicts.

It supports two distinct operational modes: RAM mode (CE = LOW, SEM = HIGH) and semaphore mode (CE = HIGH, SEM = LOW), with dedicated 3-bit address decoding (A0–A2) for eight semaphore flags. The device guarantees tBDD ≤ 30 ns (BUSY disable to valid data) and tSWRD = 5 ns (SEM write-to-read delay), critical for lock-free synchronization in real-time OS kernels.

Key Specifications

Pinout & Package

7005L15PF is housed in a 64-pin thin quad flatpack (TQFP) with 0.5 mm pitch, 14 mm × 14 mm body, and exposed thermal pad. Pin 1 is marked by a dot or beveled corner; all VCC pins require local 0.1 µF decoupling, and all GND pins must be connected to solid ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and IDT70V25L15PF, the 7005L15PF uniquely combines 5 V TTL compatibility, 2 V battery retention, and proven military-grade reliability in TQFP-64 - making it irreplaceable for retrofitting legacy industrial controllers without board redesign.

Availability

7005L15PF is available at Aetrix Electronics and suitable for real-time multi-core control, dual-processor communication bridges, and industrial PLC memory expansion requiring stable component supply across extended product lifecycles.

Supply support for 7005L15PF 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 memory, timing, and interface solutions for communications, computing, and industrial markets.

The 7005L15PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in hard real-time systems where hardware arbitration and sub-microsecond latency are mandatory.

FAQ

What is the maximum operating frequency supported by the 7005L15PF?

The 7005L15PF guarantees a 15 ns maximum read cycle time (tRC), enabling reliable operation at 66.7 MHz per port under commercial temperature conditions (0°C to +70°C). This timing is validated across voltage (4.5 V–5.5 V) and process corners, and does not require derating for simultaneous dual-port access - a key advantage over pseudo-dual-port alternatives.

Does the 7005L15PF support battery backup operation, and what is the minimum retention voltage?

Yes, the 7005L15PF supports battery backup operation with guaranteed data retention down to 2.0 V (VDR), as specified in Table 9. In this mode, typical data retention current (ICCDR) is 100 µA, allowing multi-year operation on standard coin cells. The device maintains full functionality - including BUSY arbitration and semaphore access - at 2 V, unlike many SRAMs that disable control logic below 3 V.

How does the M/S pin affect BUSY signal behavior on the 7005L15PF?

When M/S = HIGH, the 7005L15PF operates as a master: BUSYL and BUSYR are push-pull outputs that assert LOW during write contention to block conflicting accesses. When M/S = LOW, it operates as a slave: BUSYL and BUSYR become inputs, and external BUSY signals from a master device inhibit local writes - enabling hierarchical arbitration in multi-device systems without additional logic.

Can the 7005L15PF perform simultaneous reads from both ports to the same memory address?

Yes, the 7005L15PF uses true dual-port memory cells that allow completely independent, simultaneous read operations - even to identical addresses - with no timing penalty or bus turnaround delay. This capability is intrinsic to its cell design and requires no special configuration; both ports deliver valid data within their respective tAA (15 ns max) windows without arbitration overhead.

What are the valid address ranges for interrupt flag set/clear operations on the 7005L15PF?

Interrupt flags are controlled via dedicated addresses: writing any value to left port address 1FFEh sets the INTL flag, while writing to 1FFFh clears it; similarly, right port address 1FFEh sets INTR and 1FFFh clears it. These addresses are decoded exclusively in RAM mode (SEM = HIGH) and do not overlap with memory array locations - ensuring safe, side-effect-free interrupt signaling.