Renesas 7035L15PFG8

Overview

IDT7035L15PFG8 from Integrated Device Technology (IDT) is a high-speed, 8K × 18 true dual-port static RAM with independent left/right ports, 15 ns maximum access time (commercial grade), TTL-compatible 5V ±10% supply, and integrated hardware semaphore and BUSY arbitration logic. It enables simultaneous read/write to the same memory location in real-time inter-processor communication systems.

For engineers reviewing the IDT7035L15PFG8 datasheet, IDT7035L15PFG8 pinout, IDT7035L15PFG8 application, or IDT7035L15PFG8 equivalent, key selection considerations include dual-port timing synchronization, master/slave BUSY flag behavior, 18-bit byte-select control for multiplexed bus compatibility, and battery-backed data retention at 2V.

Technical Context

The IDT7035L15PFG8 implements fully asynchronous dual-port operation with separate address, control, and I/O buses per port. Its on-chip arbitration logic resolves contention via push-pull BUSY outputs (when M/S = VIH) or BUSY inputs (when M/S = VIL), supporting master/slave cascading for 36-bit+ word systems without external logic.

It integrates eight dedicated semaphore flags addressed by A0–A2, writable via I/O0 and readable across all 18 I/O lines, with full hardware support for mutual exclusion between processors. Semaphore access requires CE = VIH or UB/LB = VIH and SEM = VIL - distinct from standard RAM access which requires CE = VIL, UB/LB = VIL, and SEM = VIH.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm; all VCC and GND pins must be connected per datasheet layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with CY7C1370D-133AXC and AS7C3616A-15JC, the IDT7035L15PFG8 delivers integrated hardware arbitration and 2V data retention - eliminating design risk from external logic timing mismatches and enabling fail-safe operation during brownouts.

Availability

IDT7035L15PFG8 is available at Aetrix Electronics and suitable for real-time inter-processor communication, digital signal co-processing, and industrial PLC memory expansion requiring stable component supply and long-term lifecycle support.

Supply support for IDT7035L15PFG8 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) was a fabless semiconductor company specializing in timing, memory interface, RF, and sensor solutions before its acquisition by Renesas Electronics in 2019. IDT pioneered high-performance dual-port SRAM architectures for real-time embedded systems.

The IDT7035L15PFG8 belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in telecom, industrial automation, and military/aerospace systems requiring hardware-enforced memory coherency.

FAQ

What is the maximum access time specification for the IDT7035L15PFG8?

The IDT7035L15PFG8 has a maximum address access time (tAA) of 15 ns under commercial temperature conditions (0°C to +70°C) and 5.0 V ±10% supply. This value is guaranteed across the full operating range and applies independently to both left and right ports during asynchronous operation.

Does the IDT7035L15PFG8 support battery backup operation, and what is the minimum retention voltage?

Yes, the IDT7035L15PFG8 supports battery backup operation with guaranteed data retention down to 2.0 V (VDR). At this voltage, typical data retention current (ICCDR) is 100 µA, with a maximum of 1500 µA over the commercial temperature range - enabling reliable non-volatile storage during main power loss.

How does the M/S pin affect BUSY pin functionality on the IDT7035L15PFG8?

When M/S = VIH, BUSYL and BUSYR operate as push-pull outputs indicating port contention; when M/S = VIL, they become inputs used for write-inhibit control in slave-mode cascades. This pin configures the device as either an arbitration master (output) or synchronized slave (input), enabling scalable multi-chip memory arrays.

What are the dedicated interrupt mailbox addresses for the IDT7035L15PFG8, and how are they triggered?

The IDT7035L15PFG8 uses address 1FFEh to set the left port interrupt flag (INTL) and 1FFFh to set the right port flag (INTR). A write to either address with the corresponding port's CE and R/W asserted low triggers the flag; clearing requires a read-enable access to the same address - enabling software-defined message passing.

Can the IDT7035L15PFG8 perform simultaneous reads from both ports to the same memory location without conflict?

Yes, the IDT7035L15PFG8 supports true simultaneous reads from both ports to the exact same memory location - a core capability of its dual-port SRAM cell architecture. No arbitration, delay, or BUSY assertion occurs during concurrent reads, ensuring deterministic latency for mirrored data access.