Renesas 7007L20PFI8

Overview

7007L20PFI8 from IDT (Integrated Device Technology) is a high-speed 32K × 8 dual-port static RAM with true independent left/right ports, 20 ns max access time (industrial grade), 5 V ±10% single supply, and on-chip semaphore/interrupt arbitration logic. It enables simultaneous asynchronous reads of the same memory location and supports master/slave cascading for 16-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the 7007L20PFI8 datasheet, 7007L20PFI8 pinout, 7007L20PFI8 application, or 7007L20PFI8 equivalent, key selection criteria include BUSY flag timing (tBDD ≤ 30 ns), dual-port contention resolution via M/S pin, industrial temperature range (–40°C to +85°C), and compatibility with TTL-level control signals without level-shifting.

Technical Context

The 7007L20PFI8 implements fully asynchronous dual-port operation with separate address, data, and control buses per port. Its on-chip arbitration logic resolves port contention using either CE-driven or address-match–driven BUSY assertion, with tAPS = 5 ns priority setup time ensuring deterministic resolution when both ports access overlapping addresses.

It integrates dedicated semaphore registers (8 flags, addressed by A0–A2) accessible via SEM = VIL mode, and interrupt flags (INTL/INTR) triggered by writes to fixed mailbox addresses (7FFE_H/7FFF_H). All I/Os are TTL-compatible, and power-down is controlled independently per port via CEL/CER.

Key Specifications

Pinout & Package

7007L20PFI8 is packaged in an 80-pin TQFP (Thin Quad Flat Package), body size 14 mm × 14 mm × 1.4 mm, lead pitch 0.5 mm, RoHS-compliant and green (halogen-free).

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AXC and AS7C33256P-20JIN, the 7007L20PFI8 uniquely delivers integrated BUSY arbitration, semaphore, and interrupt logic in a 5 V, 80-pin TQFP package-enabling drop-in replacement in legacy industrial designs without redesigning control firmware or PCB layout.

Availability

7007L20PFI8 is available at Aetrix Electronics and suitable for motor control systems, telecom line cards, industrial PLC backplanes, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for 7007L20PFI8 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 solutions, now part of Renesas Electronics since 2019.

The IDT7007 family was designed specifically for deterministic inter-processor communication in real-time embedded systems, emphasizing hardware-accelerated arbitration and industrial-grade reliability over raw density or speed.

FAQ

What is the operating temperature range specified for the 7007L20PFI8?

The 7007L20PFI8 is rated for industrial temperature operation from –40°C to +85°C. This specification is production-tested and guaranteed across all DC and AC electrical parameters in the datasheet, making it suitable for deployment in uncooled industrial enclosures, factory automation controllers, and outdoor telecom infrastructure where ambient temperatures exceed commercial limits.

Does the 7007L20PFI8 support true simultaneous read access to the same memory location from both ports?

Yes, the 7007L20PFI8 implements true dual-ported memory cells that allow concurrent reads of identical addresses on the left and right ports without contention or delay. This capability is inherent to the silicon architecture-not dependent on external logic-and is explicitly confirmed in the device's functional description and truth tables under non-contention conditions.

How does the M/S pin affect BUSY signal behavior on the 7007L20PFI8?

When M/S = HIGH, the 7007L20PFI8 operates as a Master: BUSYL and BUSYR become push-pull outputs that assert LOW during port contention. When M/S = LOW, it operates as a Slave: BUSYL and BUSYR become inputs that must be driven LOW by an external Master to inhibit writes. This pin configures the device for cascaded multi-RAM topologies without external logic.

What are the valid mailbox addresses used for interrupt generation in the 7007L20PFI8?

The 7007L20PFI8 uses fixed hexadecimal addresses for interrupt triggering: writing to address 7FFE_H asserts the left-port interrupt flag (INTL), and writing to 7FFF_H asserts the right-port flag (INTR). Clearing is performed by reading those same addresses with OE enabled-no additional control registers or configuration is required.

Can the 7007L20PFI8 be operated with a 3.3 V supply?

No, the 7007L20PFI8 requires a 5.0 V ±10% supply (4.5 V to 5.5 V) and is not rated for 3.3 V operation. Its input thresholds (VIH = 2.2 V min, VIL = 0.8 V max) and output drive strength are optimized for TTL compatibility at 5 V. Using 3.3 V risks undefined logic states, timing violations, and potential damage due to internal biasing constraints.