Renesas 7027L20PFGI

Overview

IDT7027L20PFGI 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, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and full on-chip semaphore and BUSY arbitration logic. It serves as a master/slave-configurable memory buffer in real-time inter-processor communication systems requiring deterministic contention resolution.

For engineers reviewing the IDT7027L20PFGI datasheet, IDT7027L20PFGI pinout, IDT7027L20PFGI application, or IDT7027L20PFGI equivalent, key selection considerations include its 100-pin TQFP package, industrial temperature range (–40°C to +85°C), dual independent port control (CE0/CE1, R/WL/R/WR, OEL/OER), and hardware-supported semaphore signaling for lock-free synchronization between heterogeneous processors.

Technical Context

The IDT7027L20PFGI implements fully asynchronous dual-port operation with separate address, data, and control buses per port - left (L) and right (R) - allowing concurrent access without external arbitration logic. Its on-chip arbitration uses address-match detection and chip-enable timing to assert BUSY flags, with M/S pin selecting master (BUSY output) or slave (BUSY input) mode.

It integrates eight dedicated semaphore registers addressed via A0–A2, writable by I/O0 and readable across all 16 I/O lines, enabling atomic resource locking between ports. All control signals (CE0/CE1, R/W, OE, UB/LB, SEM) are TTL-compatible and operate from a single 5.0 V ±10% supply.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C33256PFS-20TIN, the IDT7027L20PFGI uniquely delivers integrated hardware semaphore, BUSY arbitration, and 5 V TTL compatibility - eliminating external logic and ensuring sub-20 ns deterministic access in industrial and avionics inter-processor links.

Availability

IDT7027L20PFGI is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal processing buffering, and industrial PLC memory coherency requiring stable component supply across extended product lifecycles.

Supply support for IDT7027L20PFGI 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, IDT) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and memory solutions for industrial, automotive, and communications markets.

The IDT7027L20PFGI belongs to IDT's legacy high-speed dual-port SRAM product line, engineered specifically for deterministic, low-latency memory sharing between independent processors in mission-critical embedded systems.

FAQ

What is the operating temperature range of the IDT7027L20PFGI?

The IDT7027L20PFGI is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the DC Electrical Characteristics table (Table 6) and explicitly stated in the "Industrial temperature range (–40°C to +85°C) is available for selected speeds" note on page 1 of the datasheet. The "L" suffix denotes the low-power industrial variant, and the "20" indicates 20 ns access time.

Does the IDT7027L20PFGI support true simultaneous access to the same memory location?

Yes, the IDT7027L20PFGI features true dual-ported memory cells that allow simultaneous read/write access to the same address. This is explicitly stated in the "Features" section: "True Dual-Ported memory cells which allow simultaneous access of the same memory location." The functional block diagram and arbitration logic ensure deterministic resolution via BUSY flag assertion when contention occurs.

How does the M/S pin affect BUSY pin behavior on the IDT7027L20PFGI?

When M/S = VIH, the IDT7027L20PFGI operates as a master: BUSYL and BUSYR are active outputs asserting contention status. When M/S = VIL, it operates as a slave: BUSYL and BUSYR become inputs that inhibit writes when driven low by a master device. This is documented in Note 1 on page 1 ("BUSY is an input as a Slave… and an output as a Master") and Truth Table V (page 16).

What is the standby current consumption of the IDT7027L20PFGI under full CMOS-inactive conditions?

The IDT7027L20PFGI draws 0.2 mA typical (ISB3) when both ports are fully inactive with all inputs at CMOS levels (CE > VCC – 0.2 V, VIN < 0.2 V or > VCC – 0.2 V). This value is specified in Table 10a for the "7027L" variant under "ISB3 Full Standby Current (Both Ports)" at industrial temperature, confirming its ultra-low-power capability.

Can the IDT7027L20PFGI be used in a 32-bit data bus configuration?

Yes, the IDT7027L20PFGI supports 32-bit bus expansion using the Master/Slave cascade method. As stated in the Features section: "IDT7027 easily expands data bus width to 32 bits or more using the Master/Slave select when cascading more than one device." The M/S pin configures BUSY directionality, and dual CE0/CE1 enables seamless depth/width expansion without external logic.