Renesas 7027L20PFI8

Overview

IDT7027L20PFI8 from IDT (Integrated Device Technology) is a high-speed 32K × 16 dual-port static RAM with true dual-port architecture enabling simultaneous read/write access to the same memory location, 20 ns maximum access time (industrial grade), 1 mW typical standby power, and full on-chip semaphore and BUSY arbitration logic - deployed in real-time embedded systems requiring deterministic inter-processor communication.

For engineers reviewing the IDT7027L20PFI8 datasheet, IDT7027L20PFI8 pinout, IDT7027L20PFI8 application, or IDT7027L20PFI8 equivalent, key selection considerations include industrial temperature support (–40°C to +85°C), TQFP-100 packaging, dual 16-bit independent data buses, master/slave cascading capability for 32-bit+ systems, and hardware semaphore signaling without external logic.

Technical Context

The IDT7027L20PFI8 implements fully asynchronous dual-port operation with separate address, control, and I/O pins per port, enabling concurrent access without timing interlock. Its on-chip arbitration logic resolves contention via address-match or chip-enable priority, with BUSY flag assertion (push-pull output) when write conflicts occur.

It supports both RAM array access (CE = VIL, SEM = VIH) and semaphore register access (CE = VIH, SEM = VIL), using A0–A2 to select among eight semaphore flags. The M/S pin configures master (BUSY output) or slave (BUSY input) mode for depth expansion, and upper/lower byte enables (UB/LB) allow 8-bit bus matching.

Key Specifications

Pinout & Package

Package: 100-pin TQFP (Thin Quad Flatpack), JEDEC MS-026AC, body size 14 mm × 14 mm × 1.4 mm; requires all VCC and GND pins to be connected per datasheet note.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C33256B-20TIN, the IDT7027L20PFI8 uniquely delivers 5 V compatibility, push-pull BUSY signaling, integrated semaphores, and M/S-configurable cascading - making it irreplaceable in legacy industrial and aerospace designs demanding hardware-enforced determinism.

Availability

IDT7027L20PFI8 is available at Aetrix Electronics and suitable for real-time motor control, avionics flight management, and industrial PLC I/O modules requiring stable component supply across extended product lifecycles.

Supply support for IDT7027L20PFI8 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, and RF solutions, acquired by Renesas Electronics in 2019.

The IDT7027L20PFI8 belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in industrial, aerospace, and medical embedded systems where hardware arbitration and zero-software-overhead synchronization are mandatory.

FAQ

What is the operating temperature range of the IDT7027L20PFI8?

The IDT7027L20PFI8 is rated for industrial temperature operation from –40°C to +85°C, verified across all electrical parameters including 20 ns access time and 1 mW standby power. This range is explicitly confirmed in the DC Electrical Characteristics table (Table 6) and Recommended Operating Conditions (Table 7) of the official datasheet, making IDT7027L20PFI8 suitable for under-hood automotive, factory automation, and outdoor telecom equipment.

Does the IDT7027L20PFI8 support true simultaneous access to the same memory location?

Yes, the IDT7027L20PFI8 features true dual-ported memory cells that permit simultaneous read and write operations to the identical address location - a capability explicitly stated in the "Features" section and enabled by its internal cell architecture. This allows lock-free data exchange between processors, and is distinct from pseudo-dual-port devices requiring external arbitration. The IDT7027L20PFI8 implements this with on-chip BUSY flag assertion to manage write-write contention.

How does the M/S pin function on the IDT7027L20PFI8?

The M/S pin on the IDT7027L20PFI8 configures the device as either Master (M/S = VIH) or Slave (M/S = VIL). In Master mode, BUSYL and BUSYR are push-pull outputs signaling port contention; in Slave mode, they become inputs that inhibit writes when asserted. This enables seamless depth expansion for 32-bit+ systems without external logic, as documented in the Functional Block Diagram and Pin Names table (page 3) of the datasheet.

What is the standby current consumption of the IDT7027L20PFI8?

The IDT7027L20PFI8 exhibits 1 mW typical standby power (equivalent to ~200 µA at 5 V), specified under ISB3 Full Standby Current conditions (both ports disabled with CMOS-level inputs). This value is confirmed in Table 10a for the "L" variant at 20 ns speed grade and is significantly lower than the "S" variant (5 mW), making IDT7027L20PFI8 optimal for power-sensitive industrial controllers with frequent idle states.

Can the IDT7027L20PFI8 be used for semaphore-based inter-processor synchronization?

Yes, the IDT7027L20PFI8 integrates full on-chip hardware semaphore logic supporting eight independent flags, accessed via A0–A2 while CE = VIH and SEM = VIL. Each flag can be written via I/O0 and read across all 16 I/O lines, enabling atomic lock acquisition/release without software intervention. This capability is detailed in Truth Table III and the Functional Description section (page 16), confirming IDT7027L20PFI8's suitability for real-time OS messaging and resource sharing.