Renesas 7025L15JG

Overview

IDT7025L15JG from Integrated Device Technology (IDT) is a high-speed 8K × 16-bit true dual-port static RAM with 15 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and industrial temperature range (–40°C to +85°C). It supports simultaneous independent access from left and right ports, on-chip semaphore arbitration, and battery-backed data retention at 2V - enabling use in real-time interprocessor communication systems requiring deterministic latency and conflict-free shared memory.

For engineers reviewing the IDT7025L15JG datasheet, IDT7025L15JG pinout, IDT7025L15JG application, or IDT7025L15JG equivalent, key selection considerations include its 15 ns access timing, dual-port arbitration logic, BUSY/INT flag behavior, and 84-pin PGA package compatibility with legacy military and industrial backplane designs.

Technical Context

The IDT7025L15JG implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via hardware BUSY flag generation when both ports access the same address, with priority determined by M/S pin state and tAPS setup timing.

It supports two distinct operational modes: MASTER (BUSY output, interrupt generation) and SLAVE (BUSY input, write blocking), enabling cascaded 32-bit+ memory expansion without external logic. Semaphore signaling uses dedicated SEM pins and A0–A2 addressing for eight independent flags, accessible independently of main memory array.

Key Specifications

Pinout & Package

Package: 84-pin Ceramic PGA (PLG84), pin-compatible with IDT7025S/L family variants. Requires all VCC and GND pins to be connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V25L15PF, the IDT7025L15JG uniquely supports 5 V TTL operation, 2 V battery retention, and 84-pin PGA packaging - making it irreplaceable in legacy avionics, industrial control, and military platforms where voltage compatibility, long-term component availability, and nonvolatile backup are mandatory.

Availability

IDT7025L15JG is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing buffering, and avionics data concentrator applications requiring stable component supply across extended product lifecycles.

Supply support for IDT7025L15JG 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

Integrated Device Technology (IDT) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019.

The IDT7025L15JG belongs to the IDT7025 dual-port SRAM product line, designed specifically for deterministic, low-latency shared-memory architectures in military, industrial, and telecommunications systems demanding hardware-enforced arbitration and battery-backed reliability.

FAQ

What is the guaranteed maximum access time for IDT7025L15JG under industrial temperature conditions?

The IDT7025L15JG guarantees a maximum read cycle time (tRC) of 15 ns across the full industrial temperature range (–40°C to +85°C) at VCC = 5.0 V ±10%, as specified in Table 12a of the official datasheet. This timing is validated for both commercial and industrial grades, distinguishing it from slower variants like the 20 ns or 25 ns versions.

Does IDT7025L15JG support true simultaneous read operations from both ports to the same memory location?

Yes, the IDT7025L15JG implements true dual-ported memory cells that permit simultaneous reads from both left and right ports to identical addresses without contention or data corruption. This capability is explicitly stated in the "Features" section and enabled by independent sense amplifiers and I/O paths per port.

How does the BUSY arbitration mechanism function in IDT7025L15JG when both ports access the same address?

When both ports attempt access to the same address, the IDT7025L15JG asserts BUSY on the contending port within 15 ns (tBAA) if configured as MASTER (M/S = H), or blocks write initiation if configured as SLAVE (M/S = L). The arbitration priority is fixed by M/S pin state and requires tAPS ≥5 ns setup to guarantee deterministic resolution.

What is the minimum supply voltage required to maintain data integrity in IDT7025L15JG during power loss?

The IDT7025L15JG guarantees data retention down to 2.0 V (VDR), as confirmed in Table 10. At this voltage, typical data retention current (ICCDR) is ≤4000 µA over the industrial temperature range, enabling reliable battery backup operation without external supervision circuitry.

Is IDT7025L15JG pin-compatible with other members of the IDT7025 family such as IDT7025S15JG?

Yes, the IDT7025L15JG shares identical pinout, package (84-pin PGA), and functional interface with all IDT7025S/L variants including IDT7025S15JG. The 'L' suffix denotes low-power standby characteristics (1 mW typ vs. 5 mW typ for 'S'), but electrical signaling, timing, and mechanical footprint are fully interchangeable.