Renesas 7027L15PF8

Overview

IDT7027L15PF8 from IDT (now Renesas) is a high-speed 32K × 16 dual-port static RAM with true dual-ported memory cells enabling simultaneous read/write access to the same address, 15 ns maximum access time (commercial grade), 1 mW typical standby power, and full on-chip semaphore and arbitration logic - deployed in real-time interprocessor communication systems requiring deterministic data exchange between independent bus domains.

For engineers reviewing the IDT7027L15PF8 datasheet, IDT7027L15PF8 pinout, IDT7027L15PF8 application, or IDT7027L15PF8 equivalent, key selection criteria include port-to-port contention resolution timing (tBDD ≤ 15 ns), BUSY flag behavior under M/S = VIH configuration, TTL-compatible 5V ±10% operation, and TQFP-100 package compatibility with legacy board layouts.

Technical Context

The IDT7027L15PF8 implements fully asynchronous dual-port architecture with independent left/right control, address, and I/O buses - each port supports separate chip enables (CE0/CE1), read/write (R/W), output enable (OE), upper/lower byte selects (UB/LB), and semaphore enables (SEM). Port arbitration is hardware-managed via internal logic that asserts BUSY when address contention occurs.

It integrates eight semaphore flags accessible via A0–A2 and I/O0 (write) / all I/Os (read), with interrupt support triggered by writes to dedicated mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR). The device operates exclusively at 5.0 V ±10% and supports industrial temperature range (–40°C to +85°C) per its L-grade designation.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (Pb-free, RoHS-compliant), body size 14 mm × 14 mm × 1.4 mm, thermal pad exposed on underside.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-15ZXI, IDT7027L15PF8 delivers native 5V operation and hardware semaphore support without external logic; versus 70V27L15PF8, it offers identical functionality but with earlier production revision - both share TQFP-100 footprint and interprocessor timing guarantees.

Availability

IDT7027L15PF8 is available at Aetrix Electronics and suitable for real-time interprocessor communication, digital signal processing subsystems, and industrial motion control systems requiring stable component supply, guaranteed long-term availability, and consistent parametric performance across production lots.

Supply support for IDT7027L15PF8 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

Renesas Electronics Corporation (formerly Integrated Device Technology) is a global semiconductor leader specializing in microcontrollers, analog, power management, and memory solutions for industrial, automotive, and communications markets.

IDT7027L15PF8 belongs to the legacy IDT7000 family of high-speed dual-port SRAMs, engineered specifically for deterministic interprocessor communication in hard real-time embedded systems where bus arbitration latency and power efficiency are critical.

FAQ

What is the maximum operating frequency supported by the IDT7027L15PF8?

The IDT7027L15PF8 does not operate at a fixed clock frequency but supports asynchronous access with a 15 ns maximum access time (tAA). This corresponds to a theoretical maximum sustained transfer rate of approximately 67 MHz for consecutive random accesses - however, actual system throughput depends on address setup, hold, and cycle timing constraints defined in the AC specifications table.

Does the IDT7027L15PF8 require external arbitration logic when used in a multi-processor system?

No, the IDT7027L15PF8 includes full on-chip hardware arbitration logic. When address contention occurs between ports, the device automatically asserts the BUSY signal within 15 ns (tBDD) to inhibit conflicting writes - eliminating the need for external glue logic or software-based coordination in dual-processor configurations.

How does the semaphore functionality work on the IDT7027L15PF8?

The IDT7027L15PF8 integrates eight hardware semaphore flags accessible via address lines A0–A2 and data line I/O0. Writing "0" to a semaphore sets it for exclusive access; writing "1" releases it. All 16 I/O lines reflect the flag state during reads - enabling atomic resource locking across processors without CPU intervention or bus cycles.

Can the IDT7027L15PF8 be used in a 32-bit data bus configuration?

Yes, the IDT7027L15PF8 supports 32-bit expansion via Master/Slave cascading. When configured as Master (M/S = VIH), its BUSY output controls Slave devices (M/S = VIL); multiple IDT7027L15PF8 units can be combined using CE0/CE1 and BUSY handshaking to construct wider memory interfaces without external decoding logic.

What is the power consumption difference between active and standby modes for the IDT7027L15PF8?

In active operation, the IDT7027L15PF8 consumes 200 mA typical dynamic current (ICC), equating to ~1 W at 5V. In full standby (ISB3), it draws only 0.2 mA typical - reducing power to 1 mW. This >1000× reduction enables energy-efficient hold states during processor idle periods while retaining memory contents.