Renesas 7005L25JI8

Overview

7005L25JI8 from IDT is a high-speed 8K × 8 dual-port static RAM with true independent left/right ports, 25 ns maximum read cycle time (tRC), 1 mW typical standby power, and industrial temperature range (–40°C to +85°C). It enables simultaneous asynchronous access to the same memory location and supports master/slave cascading for 16-bit+ bus expansion in real-time embedded control systems.

For engineers reviewing the 7005L25JI8 datasheet, 7005L25JI8 pinout, 7005L25JI8 application, or 7005L25JI8 equivalent, this page delivers verified timing parameters, BUSY/SEM/INT arbitration behavior, dual-port DC/AC electrical specs, TQFP-64 package mapping, and validated alternatives for real-time multiprocessing designs requiring deterministic memory coherency.

Technical Context

The 7005L25JI8 implements fully asynchronous dual-port architecture with on-chip hardware semaphore logic (8 flags addressed via A0–A2), automatic port arbitration using BUSYL/BUSYR push-pull signals, and M/S pin-controlled master/slave configuration. It supports both CE-controlled and R/W-controlled write cycles with tEW = 20 ns max and tWP = 20 ns min.

Its low-power L-version uses CMOS process to achieve 1 mW typical standby current (ISB3) at 5 V and retains data down to 2 V (VDR), enabling battery-backed operation. All I/Os are TTL-compatible with VIH = 2.2 V min and VOL = 0.4 V max under 4 mA load.

Key Specifications

Pinout & Package

Ceramic-enhanced 64-pin TQFP (PNG64) package with 0.5 mm pitch; requires all VCC pins connected to 5 V and all GND pins tied to system ground. Body dimensions: 14 mm × 14 mm × 1.4 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-25AXC and AS7C38098B-25JCIN, the 7005L25JI8 uniquely integrates BUSY arbitration, semaphore registers, and master/slave configuration in a 5 V/64-pin footprint - eliminating external glue logic and reducing BOM count for real-time deterministic systems.

Availability

7005L25JI8 is available at Aetrix Electronics and suitable for real-time digital signal processing, industrial PLC memory buffering, and avionics data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 7005L25JI8 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 IDT7005 product line was engineered for deterministic multiprocessing systems requiring zero-wait-state shared memory with hardware-enforced coherency - targeting military, industrial, and telecom infrastructure applications.

FAQ

What is the maximum operating temperature range for the 7005L25JI8?

The 7005L25JI8 is rated for industrial temperature operation from –40°C to +85°C, as confirmed in the Absolute Maximum Ratings table and Operating Conditions section of the official IDT datasheet. This range applies specifically to the 'L' (low-power) version with 25 ns speed grade, and is validated across all DC and AC parameters including tRC, ISB3, and VDR.

Does the 7005L25JI8 support true simultaneous read operations on both ports to the same memory address?

Yes, the 7005L25JI8 features true dual-ported memory cells that permit simultaneous reads of the identical memory location from both left and right ports without contention or arbitration delay. This capability is explicitly stated in the Features section and enabled by its independent address/data/control paths - a core architectural differentiator from pseudo-dual-port or pipelined SRAMs.

How does the M/S pin affect BUSY signal behavior on the 7005L25JI8?

When M/S = H, the 7005L25JI8 operates as a master: BUSYL and BUSYR are push-pull outputs asserting low during port contention. When M/S = L, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This configuration enables hierarchical arbitration in multi-device systems without external logic.

What is the data retention voltage specification for the 7005L25JI8?

The 7005L25JI8 guarantees data retention down to 2.0 V (VDR = 2.0 V min), as specified in Table 9 (Data Retention Characteristics). This allows battery backup operation during main power loss, with ICCDR ≤ 4000 µA (military/industrial) ensuring >100 hours of retention on a typical 100 µAh coin cell - a key requirement for fail-safe industrial controllers.

Can the 7005L25JI8 be used in a 16-bit data bus configuration?

Yes, the 7005L25JI8 supports 16-bit expansion via master/slave cascading: two devices are connected with M/S = H on the master and M/S = L on the slave, using BUSY handshaking to coordinate access. The datasheet confirms this topology enables full-speed, error-free 16-bit operation without additional discrete logic - a documented capability of the IDT7005 family.