Renesas 7027L55PF

Overview

IDT7027L55PF from IDT (Integrated Device Technology) 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, 55 ns maximum access time, 1 mW typical standby power, TTL-compatible 5 V ±10% supply, and integrated hardware semaphore/arbiration logic - deployed in real-time embedded systems requiring deterministic inter-processor communication.

For engineers reviewing the IDT7027L55PF datasheet, IDT7027L55PF pinout, IDT7027L55PF application, or IDT7027L55PF equivalent, key selection considerations include its 100-pin TQFP package, master/slave cascading capability for 32-bit+ bus expansion, BUSY-flag arbitration timing (tBDD ≤ 55 ns), industrial temperature range (–40°C to +85°C), and dual-byte control for flexible bus matching.

Technical Context

The IDT7027L55PF implements fully asynchronous dual-port operation with independent left/right address, control, and I/O buses, supporting concurrent access without external arbitration logic. Its on-chip arbitration resolves port contention via BUSY flag assertion based on address match or chip enable timing, with tAPS = 5 ns priority setup and tBDD ≤ 55 ns disable-to-valid-data delay.

Hardware semaphore signaling uses dedicated SEM pins and A0–A2 addressing to manage eight shared flags across both ports; interrupt generation is triggered by writes to fixed mailbox addresses (7FFE_H/7FFF_H). Power management employs CE0/CE1-controlled automatic power-down, achieving 1 µA full-standby current (ISB3) under CMOS-level inputs.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-55AXC and R1EX24032AS0A, IDT7027L55PF delivers unique value through integrated hardware semaphore support, M/S-configurable cascading, and 1 µA full-standby current - making it optimal for tightly coupled multi-processor systems demanding deterministic, low-power IPC.

Availability

IDT7027L55PF is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control systems, and medical imaging data buffers requiring stable component supply across extended product lifecycles.

Supply support for IDT7027L55PF 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 signal conditioning ICs, now part of Renesas Electronics since 2019.

The IDT7027L55PF belongs to IDT's high-speed dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and low-latency memory sharing are critical.

FAQ

What is the maximum access time specification for the IDT7027L55PF?

The IDT7027L55PF has a maximum access time of 55 ns under commercial temperature conditions, as confirmed in the AC Electrical Characteristics table (Table 12). This parameter applies to address access (tAA), chip enable access (tACE), and read cycle time (tRC), ensuring deterministic timing for real-time system design. The 55 ns rating is specific to the '55' speed grade and validated across the full industrial temperature range (–40°C to +85°C).

Does the IDT7027L55PF support hardware semaphore functionality?

Yes, the IDT7027L55PF includes full on-chip hardware semaphore signaling between ports, controlled by SEML/SEMR pins and addressed via A0–A2. Eight semaphore flags can be written via I/O0 and read across all 16 I/O lines, with tSOP ≤ 15 ns update pulse width and tSPS ≤ 5 ns contention window - eliminating software polling and enabling atomic resource locking in multi-processor systems.

How does the M/S pin configure the IDT7027L55PF for master/slave operation?

The M/S pin configures the IDT7027L55PF as Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL/BUSYR are push-pull outputs asserting busy flags during contention; in Slave mode, they become inputs that inhibit writes when driven low. This enables cascaded 32-bit+ memory systems without external logic, with the IDT7027L55PF acting as either endpoint or intermediate node.

What is the standby power consumption of the IDT7027L55PF?

The IDT7027L55PF achieves 1 mW typical standby power (1 µA at 5 V) in full-standby mode (ISB3), verified under CMOS-level inputs with both ports deselected. This ultra-low power state is enabled by CE0/CE1-controlled automatic power-down circuitry and is critical for battery-operated industrial controllers and portable medical devices requiring extended sleep periods.

Which package type is used for the IDT7027L55PF?

The IDT7027L55PF is packaged in a 100-pin Thin Quad Flatpack (TQFP) with dimensions 14 mm × 14 mm × 1.4 mm and 0.5 mm lead pitch. This RoHS-compliant surface-mount package is explicitly listed in the Pin Configurations section (page 2) and supports standard reflow soldering processes used in industrial and automotive PCB assembly.