Renesas 70V25L15PFG

Overview

70V25L15PFG from Integrated Device Technology (IDT) is a high-speed 4K x 16 true dual-port static RAM with independent left/right asynchronous ports, 15 ns maximum access time, 3.3 V single-supply operation, and on-chip semaphore arbitration-designed for real-time inter-processor communication in telecom line cards and industrial motion controllers.

For engineers reviewing the 70V25L15PFG datasheet, 70V25L15PFG pinout, 70V25L15PFG application, or 70V25L15PFG equivalent, this page delivers verified electrical specs, validated TQFP-100 pin mapping, industrial-grade (-40°C to +85°C) thermal performance, and direct alternatives for bus-width expansion or power-optimized replacement.

Technical Context

This device implements fully asynchronous dual-port architecture with separate address, control, and I/O buses per port-enabling simultaneous read/write operations to the same memory location without contention. It integrates hardware semaphore logic across eight flags (A0–A2 addressed), supporting atomic resource locking between master/slave configurations.

Port arbitration is handled entirely on-chip via BUSY flag signaling and M/S select pin configuration: when M/S = VIH, the device acts as Master with BUSY output; when M/S = VIL, it operates as Slave with BUSY input. All I/Os are LVTTL-compatible with 3.3 V ±0.3 V supply and support upper/lower byte enable (UB/LB) for multiplexed bus compatibility.

Key Specifications

Pinout & Package

70V25L15PFG is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, JEDEC MO-137AC compliant, body size 14 mm × 14 mm × 1.4 mm. All VDD pins require local 3.3 V decoupling; all VSS pins must be connected to ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C024AV-15AXC and 70V24L15PF, the 70V25L15PFG uniquely delivers on-chip semaphore arbitration and TQFP-100 compatibility-making it the only option that preserves both timing determinism and board-level reuse in new industrial designs.

Availability

70V25L15PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, and medical imaging systems requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for 70V25L15PFG 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 sensor signal conditioning ICs for communications and computing markets.

The IDT70V25 product line was engineered specifically for deterministic, low-latency inter-processor communication in real-time embedded systems-prioritizing hardware arbitration, dual-port throughput, and industrial reliability over density or cost-per-bit.

FAQ

What is the maximum operating frequency supported by the 70V25L15PFG?

The 70V25L15PFG supports a maximum read cycle time (tRC) of 15 ns, enabling sustained operation at 66.7 MHz. This is validated across the full industrial temperature range (-40°C to +85°C) with 3.3 V ±0.3 V supply. The device achieves this without an external clock-relying instead on asynchronous control timing with CE, OE, UB/LB, and R/W signals. Performance remains stable under worst-case voltage and temperature corners per datasheet Table 11d.

Does the 70V25L15PFG support true simultaneous read/write to the same address?

Yes, the 70V25L15PFG implements true dual-port SRAM cells that allow concurrent read and write operations to the identical memory location-one port reading while the other writes-without data corruption or arbitration delay. This capability is intrinsic to its cell architecture and is explicitly confirmed in the "Features" section of the datasheet (DSC-5624/10, p.2). No external logic or timing constraints are required to enable this behavior.

How is semaphore functionality implemented in the 70V25L15PFG?

The 70V25L15PFG integrates eight dedicated hardware semaphore flags accessible via address bits A0–A2. When SEM = VIL and CE = VIH (or UB & LB = VIH), the device enters semaphore mode: I/O0 writes to the selected flag, and all I/O pins (I/O0–I/O15) reflect its value on read. Contention is resolved automatically using tSPS (5 ns minimum) and tSWRD (5 ns) timing windows-guaranteeing atomicity without CPU intervention. This is documented in Truth Table II and Figures 11–12 of DSC-5624/10.

Can the 70V25L15PFG be used in a Master/Slave configuration with other IDT dual-port RAMs?

Yes, the 70V25L15PFG supports cascaded Master/Slave operation using the M/S pin: set M/S = VIH for Master (BUSY output), or M/S = VIL for Slave (BUSY input). When multiple devices are chained, the Master's BUSY output connects to Slaves' BUSY inputs to coordinate access across wider data buses (e.g., 32-bit). This capability is confirmed in the "Features" list and Pin Names table (DSC-5624/10, pp.2,5), and requires no external arbitration logic.

What are the power supply requirements and decoupling recommendations for the 70V25L15PFG?

The 70V25L15PFG requires a single 3.3 V ±0.3 V supply (VDD) with all VDD pins connected and decoupled locally using 0.1 µF ceramic capacitors placed within 5 mm of each VDD pin. All VSS pins must be tied to a low-impedance ground plane. Total active current is 120 mA typ. (both ports active); standby drops to 0.2 mA typ. (ISB3). These values are specified in DC Electrical Characteristics Tables 9b and 9c (DSC-5624/10, pp.8–9) and assume proper PCB layout per IDT Application Note AN-xx.