Renesas 7035L15PFG

Overview

IDT7035L15PFG from IDT (Integrated Device Technology) is a high-speed, 8K × 18 true dual-port static RAM with independent left/right ports, 15 ns max access time (commercial grade), 5 V ±10% single-supply operation, and integrated hardware semaphore and BUSY arbitration logic-used in real-time inter-processor communication systems such as telecom line cards and industrial motion controllers.

For engineers reviewing the IDT7035L15PFG datasheet, IDT7035L15PFG pinout, IDT7035L15PFG application, or IDT7035L15PFG equivalent, key selection considerations include simultaneous read capability, master/slave cascading support for 36-bit+ data width, battery-backed 2 V data retention, TTL-compatible I/O, and on-chip port arbitration without external logic.

Technical Context

The IDT7035L15PFG implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration uses push-pull BUSY outputs (master mode) or BUSY inputs (slave mode) triggered by address/CE match detection, with tAPS = 5 ns priority setup time.

It integrates eight dedicated semaphore flag registers accessed via A0–A2 and controlled by SEM pin, supporting atomic read/write operations across ports. Semaphore state transitions are validated by truth table sequencing, and interrupt flags (INTL/INTR) are set/cleared at fixed addresses (1FFEh/1FFFh) using standard R/W cycles.

Key Specifications

Pinout & Package

100-pin Thin Quad Flatpack (TQFP), body size 14 mm × 14 mm × 1.4 mm; all VCC and GND pins require proper decoupling per 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 AS7C33160B-15JCIN, the IDT7035L15PFG uniquely delivers true dual-port operation with on-die semaphore, BUSY arbitration, and master/slave expansion-all in a 5 V, 100-pin TQFP package-making it optimal for deterministic real-time embedded inter-processor communication where hardware-enforced synchronization is critical.

Availability

IDT7035L15PFG is available at Aetrix Electronics and suitable for telecom infrastructure, industrial automation, avionics data acquisition, and medical imaging systems requiring stable component supply and long-term lifecycle support.

Supply support for IDT7035L15PFG 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 signal conditioning solutions, acquired by Renesas Electronics in 2019.

The IDT7035L15PFG belongs to IDT's high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in real-time embedded systems where hardware arbitration and low-latency memory sharing are essential.

FAQ

What is the maximum guaranteed access time for IDT7035L15PFG?

The IDT7035L15PFG has a maximum access time (tAA) of 15 ns under commercial temperature and voltage conditions (0°C to +70°C, VCC = 5.0 V ±10%). This value is production-tested and applies to both left and right ports independently. The 15 ns specification ensures deterministic timing for systems operating up to 66.7 MHz clock domains without wait states.

Does IDT7035L15PFG support battery backup operation, and what is the minimum retention voltage?

Yes, the IDT7035L15PFG 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. This enables reliable operation during main power failure when backed by a coin-cell or supercapacitor.

How does the BUSY arbitration logic function in master versus slave configuration of IDT7035L15PFG?

In master mode (M/S = VIH), IDT7035L15PFG drives BUSYL/BUSYR as push-pull outputs that assert LOW when address/CE contention is detected, inhibiting writes on the contending port. In slave mode (M/S = VIL), BUSYL/BUSYR become inputs used to gate writes externally. The master's BUSY output can be routed to multiple slaves' BUSY inputs to synchronize write access across a width-expanded array.

Can IDT7035L15PFG be used in a 36-bit or wider memory system, and how is that implemented?

Yes, IDT7035L15PFG supports 36-bit+ data width expansion using its Master/Slave (M/S) select feature. One device is configured as master (M/S = VIH) to manage BUSY arbitration, while additional devices operate as slaves (M/S = VIL) sharing the same address space. This eliminates external logic and preserves full-speed operation across the expanded word width.

What are the dedicated interrupt address locations for IDT7035L15PFG, and how are they cleared?

IDT7035L15PFG uses fixed addresses 1FFEh (left port INTL) and 1FFFh (right port INTR) for interrupt flag control. Writing to either address with the opposite port asserts the corresponding interrupt flag. Clearing is performed by reading the same address with the local port (e.g., left port reads 1FFEh to clear INTL). Both flags must be initialized at power-up per datasheet requirements.