Renesas 7008L20PFGI

Overview

IDT7008L20PFGI from IDT (Integrated Device Technology) is a high-speed 64K × 8 true dual-ported static RAM with independent left/right ports, 20 ns max access time (industrial grade), TTL-compatible 5V ±10% supply, and integrated BUSY/INT/SEM arbitration logic - used in real-time interprocessor communication, FPGA co-processor buffering, and legacy bus bridging where simultaneous read/write to same address is required.

For engineers reviewing the IDT7008L20PFGI datasheet, IDT7008L20PFGI pinout, IDT7008L20PFGI application, or IDT7008L20PFGI equivalent, key selection criteria include port-to-port contention resolution timing (tBDD ≤20 ns), low standby power (1 mW typ.), Master/Slave cascading support via M/S pin, and TQFP-100 packaging for space-constrained industrial control modules.

Technical Context

The IDT7008L20PFGI implements fully asynchronous dual-port operation with separate address, data, and control buses per port (A0L–A15L/I/O0L–I/O7L/R/WL/CE0L/CE1L/OEL/SEML/INTL/BUSYL on left; mirrored on right), enabling concurrent reads/writes without external arbitration logic. Its on-chip semaphore logic uses A0–A2 addressing to manage eight shared flags via I/O0–I/O7.

When configured as Master (M/S = VIH), BUSYL/BUSYR are push-pull outputs asserting during port contention; as Slave (M/S = VIL), they become inputs that inhibit writes. Interrupts are triggered by writes to FFFE_H (left flag) or FFFF_H (right flag), with tINS/tINR ≤20 ns.

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 green variant available.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-20VC and AS7C364B-20TIN, IDT7008L20PFGI delivers integrated hardware arbitration and 5V tolerance - reducing BOM count and firmware overhead in industrial multi-processor systems, albeit at higher unit cost.

Availability

IDT7008L20PFGI is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA co-processor interfaces, and legacy bus bridges requiring stable component supply, long-lifecycle support, and guaranteed TQFP-100 packaging.

Supply support for IDT7008L20PFGI 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) was a fabless semiconductor company specializing in timing, memory interface, and RF solutions before its acquisition by Renesas Electronics in 2019. It pioneered high-performance dual-port SRAM architectures for real-time systems.

IDT7008L20PFGI belongs to the IDT7008 family of true dual-port SRAMs designed specifically for deterministic interprocessor communication in industrial automation, telecommunications infrastructure, and military/aerospace avionics.

FAQ

What is the maximum operating temperature range for the IDT7008L20PFGI?

IDT7008L20PFGI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated across all electrical parameters including 20 ns access time, standby current (1 mW typ.), and BUSY arbitration timing (tBDD ≤20 ns), making it suitable for deployment in uncontrolled industrial enclosures and outdoor control cabinets where thermal cycling occurs.

Does the IDT7008L20PFGI support true simultaneous read operations from both ports to the same memory location?

Yes, IDT7008L20PFGI implements true dual-ported SRAM cells that allow concurrent reads from both left and right ports to identical addresses without contention or timing penalty. This capability is fundamental to its use in mirrored status registers and lock-free data structures - confirmed in the Functional Description section and verified by the "True Dual-Ported memory cells" feature statement.

How does the M/S pin affect BUSY signal behavior on the IDT7008L20PFGI?

When M/S = VIH, IDT7008L20PFGI operates as Master: BUSYL and BUSYR are push-pull outputs asserting LOW during port contention to block writes. When M/S = VIL, it operates as Slave: BUSYL and BUSYR become inputs that must be driven LOW by a Master device to inhibit writes - enabling hierarchical arbitration in multi-device systems without external logic.

What are the valid address ranges for interrupt flag generation in the IDT7008L20PFGI?

IDT7008L20PFGI generates interrupt flags at two fixed addresses: writing to FFFE_H (hex) on the right port asserts INTL on the left port; writing to FFFF_H on the left port asserts INTR on the right port. These locations function as mailbox registers - their contents are user-defined SRAM data, and interrupt clearing follows defined read/write sequences per Truth Table IV.

Is the IDT7008L20PFGI pin-compatible with other members of the IDT7008 family such as the IDT7008S20PFGI?

IDT7008L20PFGI and IDT7008S20PFGI share identical pinout, package (TQFP-100), and functional interface - differing only in power profile: IDT7008L offers 1 mW standby (vs. 5 mW for S-grade), optimized for always-on industrial nodes. Both meet the same 20 ns access spec and support identical arbitration, semaphore, and interrupt features.