Renesas 7005L25PF

Overview

7005L25PF from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 25 ns max read cycle time (tRC), 1 mW typical standby power, and TTL-compatible 5 V ±10% operation. It enables simultaneous asynchronous access to shared memory in real-time inter-processor communication systems such as industrial motion controllers.

For engineers reviewing the 7005L25PF datasheet, 7005L25PF pinout, 7005L25PF application, or 7005L25PF equivalent, this page delivers verified timing parameters, master/slave arbitration behavior, semaphore flag implementation, BUSY-controlled port contention resolution, and battery-backed data retention at 2 V - all confirmed for the exact 7005L25PF variant.

Technical Context

The 7005L25PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port (A0L–A12L/I/O0L–I/O7L and A0R–A12R/I/O0R–I/O7R), enabling concurrent reads/writes without internal arbitration delay. Its on-chip hardware supports semaphore signaling via A0–A2 addressing of eight flags and interrupt generation using dedicated INTL/INTR pins.

Port arbitration uses push-pull BUSYL/BUSYR signals: when configured as Master (M/S = H), BUSY outputs block conflicting writes; as Slave (M/S = L), BUSY inputs disable writes during contention. The device guarantees tBDD ≤ 30 ns (BUSY disable to valid data) and tSWRD = 5 ns (semaphore write-to-read latency), critical for deterministic real-time synchronization.

Key Specifications

Pinout & Package

7005L25PF is packaged in a 64-pin thin quad flatpack (TQFP), measuring 14 mm × 14 mm × 1.4 mm, with 0.5 mm lead pitch and exposed thermal pad. All VCC pins require decoupling; all GND pins must be connected to system ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-25JC and AS7C38097A-25JC, the 7005L25PF delivers hardware-enforced port arbitration, on-chip semaphores, and true concurrent access - reducing design risk in safety-critical industrial systems where timing predictability is non-negotiable.

Availability

7005L25PF is available at Aetrix Electronics and suitable for industrial motion controllers, redundant PLC modules, and battery-backed data loggers requiring stable component supply across extended product lifecycles.

Supply support for 7005L25PF 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 industrial and communications infrastructure.

The 7005L25PF belongs to IDT's legacy dual-port SRAM product line, engineered specifically for deterministic real-time inter-processor communication in harsh industrial environments.

FAQ

What is the guaranteed maximum read cycle time for the 7005L25PF?

The 7005L25PF has a guaranteed maximum read cycle time (tRC) of 25 ns across the full industrial temperature range (–40°C to +85°C). This parameter is production-tested and applies to both left and right ports under VCC = 5.0 V ±10%, ensuring deterministic timing for real-time control loops. The 7005L25PF datasheet specifies tRC = 25 ns (max) in Table 13a.

Does the 7005L25PF support battery backup operation, and what voltage is required?

Yes, the 7005L25PF supports battery backup operation with guaranteed data retention at VCC = 2.0 V. In this mode, typical standby current (ISB3) is 0.2 mA, enabling multi-year operation from standard coin cells. The 7005L25PF retains data across the full industrial temperature range without refresh, as confirmed in Table 9 of the official datasheet.

How does master/slave configuration work on the 7005L25PF, and what is the role of the M/S pin?

The M/S pin on the 7005L25PF configures arbitration behavior: when high, the device operates as Master with BUSYL/BUSYR as push-pull outputs that block conflicting writes; when low, it acts as Slave with BUSYL/BUSYR as inputs that inhibit local writes during contention. This enables scalable multi-device memory expansion without external logic, as detailed in Figure 1 and Note 1 of the functional description.

What are the key timing parameters for semaphore operations on the 7005L25PF?

The 7005L25PF guarantees tSOP = 10 ns (semaphore update pulse width) and tSAA = 25 ns (semaphore address access time), with tSWRD = 5 ns (semaphore write-to-read latency). These values ensure rapid, atomic resource locking in multi-core systems. All semaphore timing parameters are specified in Tables 13a and 14a of the 7005L25PF datasheet under SEM = VIL conditions.

Is the 7005L25PF pin-compatible with other speed grades in the IDT7005 family?

Yes, the 7005L25PF is pin-compatible with all other IDT7005 variants in the 64-pin TQFP package (e.g., 7005L20PF, 7005L35PF), sharing identical pinout, power sequencing, and control signal definitions. Speed grade differences affect only timing parameters - not pin function or electrical interface - allowing drop-in replacement within the same package footprint.