Renesas 7007L20JI

Overview

IDT7007L20JI 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 integrated hardware semaphore/arbiter logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7007L20JI datasheet, IDT7007L20JI pinout, IDT7007L20JI application, or IDT7007L20JI equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, semiconductor-grade industrial temperature support (–40°C to +85°C), and confirmed 80-pin TQFP package mapping - all critical for deterministic multi-CPU memory sharing designs.

Technical Context

The IDT7007L20JI implements fully asynchronous dual-port operation: each port has dedicated address (A0–A14), data (I/O0–I/O7), and control lines (CE/R/W/OE/SEM/INT/BUSY), enabling simultaneous non-contention reads of identical addresses. Its on-chip arbitration logic resolves port conflicts via BUSY flag assertion with tBDD ≤ 30 ns delay to valid data.

Hardware semaphore signaling uses A0–A2 to select among eight flags; access requires CE = VIH and SEM = VIL. Interrupts are triggered by writes to fixed mailbox addresses (7FFE_H for INTL, 7FFF_H for INTR), with tINS ≤ 20 ns interrupt set time and push-pull BUSY/INT outputs eliminating external pull-ups.

Key Specifications

Pinout & Package

Package: 80-pin Thin Quad Flatpack (TQFP), 14 mm × 14 mm body, 0.5 mm pitch, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C028V-20AC and R1EX24032AS0I-20#U0, the IDT7007L20JI uniquely integrates full hardware semaphore, interrupt mailbox, and push-pull BUSY/INT - reducing design risk, PCB complexity, and real-time latency in safety-critical dual-CPU systems.

Availability

IDT7007L20JI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ADAS domain controllers, and medical imaging subsystems requiring stable component supply across extended product lifecycles.

Supply support for IDT7007L20JI 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), now part of Renesas Electronics, specializes in high-performance timing, memory interface, and RF solutions for communications, computing, and industrial markets.

The IDT7007L20JI belongs to IDT's dual-port SRAM product line, engineered specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-enforced memory coherency.

FAQ

What is the maximum operating temperature range for the IDT7007L20JI?

The IDT7007L20JI is rated for industrial temperature operation from –40°C to +85°C. This specification is validated per manufacturer test conditions and applies to all AC and DC electrical parameters in the datasheet, including 20 ns access time and 5 µA ISB3 standby current. The device uses standard plastic TQFP packaging qualified for extended thermal cycling in harsh environments.

Does the IDT7007L20JI support true simultaneous reads from both ports to the same memory location?

Yes, the IDT7007L20JI implements true dual-port memory cells that allow concurrent reads from the left and right ports to identical addresses without contention or timing penalty. This capability is inherent to its silicon architecture and does not require external arbitration - confirmed in the Functional Block Diagram and Truth Table I of the official datasheet.

How does the BUSY arbitration logic function when the IDT7007L20JI is configured as a slave (M/S = L)?

When M/S = L, BUSYL and BUSYR become inputs. A LOW level on either BUSY pin inhibits writes to the corresponding port - e.g., BUSYL = L blocks writes on the left port regardless of R/WL or CEL state. This behavior is hardwired in the on-chip logic and requires no configuration register writes; it is defined in Truth Table IV and Timing Waveform drw 14.

Can the IDT7007L20JI be used in a 16-bit data bus configuration?

Yes, the IDT7007L20JI supports 16-bit expansion using the Master/Slave (M/S) cascade method. Two devices operate in tandem: one as master (M/S = H) asserting BUSY outputs, the other as slave (M/S = L) accepting BUSY inputs. This configuration enables full-speed, error-free 16-bit word access without external logic, as described in the device Description section and Figure 2940 drw 01.

What are the voltage levels required for reliable semaphore flag access on the IDT7007L20JI?

Semaphore access requires CE = VIH (≥2.4 V) and SEM = VIL (≤0.8 V) simultaneously, per Truth Table II and AC Electrical Characteristics note 3. Address bits A0–A2 select among eight flags; data is written via I/O0 and read across all I/O0–I/O7. This mode is electrically isolated from RAM access and operates within the same 5 V ±10% supply envelope.