Renesas 7008L15PF

Overview

IDT7008L15PF from Integrated Device Technology (IDT) is a high-speed 64K × 8 true dual-ported static RAM with independent left/right ports, 15 ns max read cycle time, TTL-compatible 5V ±10% operation, and integrated semaphore/arbitration logic for inter-processor communication in real-time embedded systems.

For engineers reviewing the IDT7008L15PF datasheet, IDT7008L15PF pinout, IDT7008L15PF application, or IDT7008L15PF equivalent, this page delivers verified timing specs, master/slave BUSY arbitration behavior, dual-port power-down modes, and TQFP-100 package layout - all critical for deterministic multi-CPU memory sharing designs.

Technical Context

The IDT7008L15PF implements fully asynchronous dual-port access with separate address, control, and I/O buses per port, enabling simultaneous reads from the same memory location. Its on-chip arbitration logic resolves contention via BUSY flag assertion (push-pull output) when address matches occur between ports.

It supports MASTER/SLAVE cascading using the M/S pin to expand data width beyond 8 bits without external logic; as MASTER (M/S = VIH), BUSYL/BUSYR are outputs; as SLAVE (M/S = VIL), they become inputs that inhibit writes during contention. Semaphore flags (8 total, addressed by A0–A2) are accessed via CE = VIH / SEM = VIL mode.

Key Specifications

Pinout & Package

Package: 100-pin Thin Quad Flatpack (TQFP), body size ≈ 14 mm × 14 mm × 1.4 mm, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C136-15VC and AS7C364B-15JC, the IDT7008L15PF uniquely integrates BUSY arbitration, semaphore registers, and MASTER/SLAVE cascading in a 5V 100-pin TQFP - making it the only drop-in solution for deterministic multi-CPU memory sharing without added logic.

Availability

IDT7008L15PF is available at Aetrix Electronics and suitable for real-time industrial PLCs, telecom line card buffering, and avionics flight control interfaces requiring stable component supply across extended production lifecycles.

Supply support for IDT7008L15PF 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

Integrated Device Technology (IDT) is a fabless semiconductor company specializing in timing, memory interface, and RF solutions for communications and computing infrastructure.

The IDT7008L15PF belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems requiring hardware-enforced memory coherency.

FAQ

What is the maximum operating frequency supported by the IDT7008L15PF?

The IDT7008L15PF has a 15 ns maximum read cycle time (tRC), supporting up to 66.7 MHz sustained operation per port under commercial conditions. This timing is guaranteed across voltage (4.5–5.5 V) and temperature (0°C to +70°C), with no derating required for simultaneous dual-port access.

How does the BUSY arbitration logic function in MASTER vs. SLAVE configuration for the IDT7008L15PF?

In MASTER mode (M/S = VIH), BUSYL and BUSYR are push-pull outputs that assert low when address contention occurs between ports. In SLAVE mode (M/S = VIL), they become inputs that internally inhibit writes when driven low by a MASTER device - enabling hierarchical arbitration in multi-chip systems without external logic.

Can the IDT7008L15PF operate with only one port enabled while the other remains powered down?

Yes. The IDT7008L15PF supports asymmetric power management: CE0L/CE1L can disable the left port while CE0R/CE1R keep the right port active, achieving ISB2 = 100 mA typ. (one port active, one in TTL standby) or ISB4 = 80 mA typ. (one port active, one in CMOS full standby), per datasheet Table 10b.

What are the valid address ranges for interrupt flag generation in the IDT7008L15PF?

The IDT7008L15PF uses fixed mailbox addresses: writing to FFFE_H (65534) via the right port asserts INTL, and writing to FFFF_H (65535) via the left port asserts INTR. Clearing is performed by reading those same addresses - both locations remain accessible as general SRAM when interrupts are unused.

Does the IDT7008L15PF require external pull-up resistors on BUSY or interrupt pins?

No. The IDT7008L15PF features push-pull (totem-pole) outputs for BUSYL, BUSYR, INTL, and INTR - confirmed in Note 2 of the Functional Block Diagram and Truth Table II. External pull-ups are unnecessary and may cause contention; direct connection to FPGA/DSP inputs is supported.