Renesas 7027L15PFG8

Overview

7027L15PFG8 from IDT is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous access to the same address, 15 ns maximum read cycle time (commercial grade), 1 mW typical standby power, and TTL-compatible 5V ±10% operation - used in real-time interprocessor communication and shared-memory embedded systems.

For engineers reviewing the 7027L15PFG8 datasheet, 7027L15PFG8 pinout, 7027L15PFG8 application, or 7027L15PFG8 equivalent, key selection criteria include port arbitration timing (tAPS = 5 ns), BUSY flag behavior under M/S = VIH/VIL configuration, semaphore addressing via A0–A2, and compatibility with 100-pin TQFP layout constraints.

Technical Context

The 7027L15PFG8 implements full on-chip hardware semaphore signaling across two independent asynchronous ports, with dedicated SEM, INT, and BUSY logic supporting master/slave cascading for 32-bit+ word systems. Its arbitration logic resolves contention via address-match detection or chip-enable timing, not software polling.

It supports separate upper-byte (UB/UBR) and lower-byte (LB/LBR) control for bus-matching, dual chip enables (CE0/CE1 per port) for depth expansion without external logic, and automatic power-down when CE = VIH - delivering 1 mW standby current at 5V.

Key Specifications

Pinout & Package

7027L15PFG8 is housed in a 100-pin TQFP (Pb-free, RoHS-compliant) with 0.5 mm pitch and 14 mm × 14 mm body size. All VCC and GND pins require local decoupling per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15AXC and IDT70V27L15PF, the 7027L15PFG8 uniquely delivers 5V TTL compatibility, 1 mW standby, and proven 15 ns timing in commercial-temperature systems - making it optimal for legacy 5V embedded controllers where voltage translation or thermal derating is unacceptable.

Availability

7027L15PFG8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing subsystems, and industrial motion control requiring stable component supply and long-term obsolescence management.

Supply support for 7027L15PFG8 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 timing, memory interface, RF, and sensor solutions, now part of Renesas Electronics.

The IDT7027 family was designed specifically for deterministic, low-latency shared-memory architectures in dual-CPU, DSP-host, and real-time control systems - emphasizing hardware arbitration, semaphore signaling, and 5V interoperability.

FAQ

What is the maximum operating frequency supported by the 7027L15PFG8?

The 7027L15PFG8 has a 15 ns maximum read cycle time (tRC), supporting up to 66.7 MHz sustained operation per port under commercial conditions. This is derived directly from tRC = 15 ns in the AC Electrical Characteristics table; no higher frequency is guaranteed, and timing margins must account for board-level propagation delays and load capacitance.

Does the 7027L15PFG8 support true simultaneous read/write to the same memory location?

Yes, the 7027L15PFG8 uses true dual-ported memory cells that allow simultaneous access to the same address - one port may read while the other writes, with BUSY flag assertion only if both attempt writes concurrently. This capability is explicitly stated in the Features section and confirmed by the Functional Block Diagram and Truth Table V.

How does the M/S pin affect BUSY functionality in the 7027L15PFG8?

When M/S = VIH, BUSYL and BUSYR are outputs indicating port contention; when M/S = VIL, they become inputs accepting BUSY signals from a master device. This dual-mode behavior is documented in Note 1 of the Functional Block Diagram and Truth Table V, enabling flexible master/slave cascading topologies without external logic.

What are the valid address ranges for interrupt flag triggering in the 7027L15PFG8?

The 7027L15PFG8 triggers INTL when the right port writes to address 7FFE_H, and INTR when the left port writes to 7FFF_H. These are fixed, non-configurable locations defined in Truth Table IV and the Functional Description section - no register programming is required to enable this mailbox behavior.

Can the 7027L15PFG8 be used in industrial temperature applications?

No - the 7027L15PFG8 is rated for commercial temperature range (0°C to +70°C) only. Industrial variants such as 7027L20PFG8 specify –40°C to +85°C operation and appear in separate speed bins (e.g., 20 ns). The "15" in 7027L15PFG8 explicitly denotes the 15 ns commercial-grade speed grade.