Renesas 70V27L15PFGI

Overview

70V27L15PFGI from Integrated Device Technology is a high-speed 3.3V 32K × 16 dual-port static RAM with true simultaneous access capability, 15 ns maximum read cycle time (tRC), industrial temperature range (−40°C to +85°C), and ultra-low standby power (660 µW typ.). It enables error-free 32-bit memory expansion via Master/Slave cascading in real-time control systems requiring deterministic inter-processor communication.

For engineers reviewing the 70V27L15PFGI datasheet, 70V27L15PFGI pinout, 70V27L15PFGI application, or 70V27L15PFGI equivalent, key selection criteria include bus-matching byte controls (UBL/LBL), on-chip semaphore arbitration, BUSY flag timing (tBAA ≤ 15 ns), and LVTTL-compatible 3.3V operation with no external logic required for depth or width expansion.

Technical Context

The 70V27L15PFGI implements fully asynchronous dual-port architecture with independent left/right address, control, and I/O buses-enabling concurrent read/write to identical memory locations without contention. Its on-chip arbitration logic resolves port conflicts via address-match or chip-enable priority, with BUSY outputs (push-pull) asserting within 15 ns of conflict detection when configured as Master (M/S = VIH).

It integrates full hardware semaphore support across eight flags (addressed by A0–A2), allowing atomic resource locking between ports. The device uses CMOS process technology and supports three standby modes-including ISB3 full standby (0.2 mA typ.) with all inputs at CMOS levels-making it suitable for low-power embedded controllers where deterministic latency and power gating are critical.

Key Specifications

Pinout & Package

70V27L15PFGI is housed in a 100-pin Thin Quad Flatpack (TQFP) with 0.5 mm pitch, 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 CY7C028V-15ZXC and R1EX24032ASAS-15, the 70V27L15PFGI delivers integrated arbitration, industrial temperature support, and seamless width expansion-reducing design risk, PCB area, and firmware complexity in mission-critical embedded systems.

Availability

70V27L15PFGI is available at Aetrix Electronics and suitable for industrial PLC backplanes, motor drive controllers, avionics data acquisition units, and digital signal processor co-processing systems requiring stable component supply, long-term lifecycle assurance, and guaranteed industrial temperature performance.

Supply support for 70V27L15PFGI 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 IDT70V27 family was designed specifically for deterministic, low-latency inter-processor communication in real-time embedded systems-prioritizing hardware arbitration, power efficiency, and seamless bus expansion over raw density or cost-per-bit.

FAQ

What is the maximum operating frequency supported by the 70V27L15PFGI?

The 70V27L15PFGI does not specify a clock frequency but guarantees a 15 ns maximum read cycle time (tRC), supporting effective data rates up to 66.7 MHz in synchronous systems. Its fully asynchronous design means timing depends on individual signal transitions-not a global clock-so actual throughput is determined by the slowest of tRC, tAA, or tACE, all rated ≤15 ns.

Does the 70V27L15PFGI support true simultaneous read/write to the same memory address?

Yes, the 70V27L15PFGI features true dual-ported memory cells that allow independent, concurrent read and write operations to the exact same memory location. This capability is fundamental to its role in inter-processor communication and is validated in the functional block diagram and Truth Table II of the official datasheet.

How does the BUSY arbitration mechanism work on the 70V27L15PFGI?

When configured as Master (M/S = VIH), the 70V27L15PFGI asserts BUSYL or BUSYR within 15 ns (tBAA) if address or chip-enable contention is detected. The BUSY signal blocks writes on the contending port until resolution. As Slave (M/S = VIL), BUSY is an input that must be monitored before initiating writes-ensuring deterministic, hardware-enforced mutual exclusion.

Can the 70V27L15PFGI be used in a 32-bit data path without external logic?

Yes-the 70V27L15PFGI supports native 32-bit expansion using its Master/Slave select (M/S) pin and cascading architecture. When two devices are connected with M/S = VIH (Master) and M/S = VIL (Slave), they form a coherent 32-bit-wide memory space with automatic BUSY coordination and no external gates or arbiters required.

What is the standby power consumption of the 70V27L15PFGI in full shutdown mode?

In full standby mode (ISB3), where both ports have CMOS-level inputs (CE > VDD − 0.2 V, all control inputs at rail), the 70V27L15PFGI draws just 0.2 mA typical (660 µW at 3.3 V). This ultra-low quiescent current is confirmed in Table 10a of the datasheet and enables use in always-on industrial sensors with multi-year battery life.