Renesas 7025L35PF

Overview

IDT7025L35PF from Integrated Device Technology (IDT) is a high-speed 8K × 16-bit true dual-port static RAM with 35 ns maximum read cycle time, TTL-compatible 5V ±10% operation, and 1 mW typical standby power. It supports simultaneous independent access from left and right ports, on-chip semaphore arbitration, and battery backup data retention down to 2V - used in real-time digital signal processors, military avionics bus controllers, and industrial motion control systems requiring deterministic memory coherency.

For engineers reviewing the IDT7025L35PF datasheet, IDT7025L35PF pinout, IDT7025L35PF application, or IDT7025L35PF equivalent, key selection considerations include its 84-pin PGA package, dual-port arbitration timing (tBAA ≤ 20 ns), 2V data retention capability, M/S-selectable master/slave cascading for 32-bit expansion, and industrial temperature range (–40°C to +85°C).

Technical Context

The IDT7025L35PF implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port, enabling concurrent read/write operations without external logic. Its on-chip arbitration logic resolves port contention via BUSY flag assertion and supports eight hardware semaphores addressed by A0–A2 for inter-processor synchronization.

It features separate upper-byte (UB/UBR) and lower-byte (LB/LBR) enables for multiplexed bus compatibility, and operates in three power modes: active (750 mW typ.), standby with TTL-level inputs (13 mA max at 35 ns), and full CMOS-level standby (0.2 mA typ.). Battery backup mode maintains data integrity at VCC = 2V with ICCDR ≤ 4000 µA across military/industrial ranges.

Key Specifications

Pinout & Package

Package: 84-pin ceramic PGA (PLG84), body size ≈ 1.15 in × 1.15 in × 0.17 in, with 16 ground pins and 4 VCC pins distributed for low-noise power delivery.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-35AXC and AS7C38099B-35PCN, the IDT7025L35PF uniquely delivers integrated BUSY arbitration, 2V data retention, and M/S-configurable cascading - making it irreplaceable in deterministic real-time systems where external logic would add latency or reduce reliability.

Availability

IDT7025L35PF is available at Aetrix Electronics and suitable for industrial motion control, avionics data concentrators, and secure bootloader implementations requiring stable component supply across extended product lifecycles.

Supply support for IDT7025L35PF 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), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, memory interface, RF, and power management ICs for communications, computing, and industrial markets.

The IDT7025 family was designed specifically for high-reliability dual-ported memory applications in military, aerospace, and industrial control systems - emphasizing deterministic arbitration, wide temperature operation, and long-term obsolescence resilience.

FAQ

What is the guaranteed data retention voltage for IDT7025L35PF?

IDT7025L35PF guarantees data retention down to 2.0 V (VDR = 2.0 V), with ICCDR ≤ 4000 µA over the full industrial temperature range (–40°C to +85°C). This specification is validated per device characterization and enables reliable operation during brown-out events or battery-backed hold conditions without external supervision circuitry.

Does IDT7025L35PF support true simultaneous read operations from both ports to the same memory location?

Yes, IDT7025L35PF implements true dual-ported memory cells that allow simultaneous reads from both left and right ports to the identical address location without contention or arbitration delay. This behavior is intrinsic to its silicon architecture and is explicitly confirmed in the Functional Block Diagram and Truth Table I of the official datasheet.

What is the function of the M/S pin on IDT7025L35PF, and how does it affect BUSY pin behavior?

On IDT7025L35PF, the M/S pin configures the device as Master (M/S = H) or Slave (M/S = L). In Master mode, BUSYL/BUSYR are outputs indicating port contention; in Slave mode, they become inputs that gate write operations. This enables automatic hardware arbitration in cascaded configurations without external logic.

Can IDT7025L35PF be used in a 32-bit memory system, and if so, how is width expansion implemented?

Yes, IDT7025L35PF supports 32-bit expansion via Master/Slave cascading: two devices are connected with M/S = H (Master) and M/S = L (Slave), using BUSY signaling to coordinate access. The IDT7025L35PF datasheet confirms this method eliminates need for discrete arbitration logic and preserves full-speed operation in wide-word systems.

What are the DC leakage current specifications for IDT7025L35PF at maximum operating voltage?

At VCC = 5.5 V and ambient temperature, IDT7025L35PF specifies |ILI| ≤ 5 µA (input leakage) and |ILO| ≤ 5 µA (output leakage) - measured across the full industrial temperature range. These values reflect the low-leakage CMOS process used in the L-version, contributing to its 1 mW standby power rating.