Renesas 7034S15PF

Overview

IDT7034S15PF from Integrated Device Technology (IDT) is a high-speed, 4K × 18 true dual-port static RAM with independent left/right ports, 15 ns max access time (commercial grade), TTL-compatible 5V ±10% supply, and integrated hardware semaphore/INT/BUSY arbitration logic. It enables simultaneous asynchronous reads of the same memory location and supports master/slave cascading for 36-bit+ bus expansion in real-time inter-processor communication systems.

For engineers reviewing the IDT7034S15PF datasheet, IDT7034S15PF pinout, IDT7034S15PF application, or IDT7034S15PF equivalent, key selection considerations include dual-port contention resolution via BUSY flag timing (tBDD ≤ 18 ns), 18-bit byte-selectable I/O (UBL/LBL), on-chip semaphore arbitration (A0–A2 addressed), and industrial-grade thermal operation up to +85°C - all critical for deterministic shared-memory embedded control.

Technical Context

The IDT7034S15PF implements fully asynchronous dual-port architecture with separate address, control, and bidirectional I/O buses per port. Its on-chip arbitration logic resolves port-to-port contention using BUSY assertion based on address match and chip enable timing (tAPS = 5 ns setup), not R/W state - enabling deterministic write inhibition during simultaneous access.

It integrates three co-located but functionally distinct subsystems: (1) main 4K×18 SRAM array with independent CE/R/W/OE per port; (2) eight dedicated semaphore flags accessed via SEM = VIL and A0–A2; and (3) interrupt mailbox at addresses FFEh (left INTL) and FFFh (right INTR), each triggered by cross-port writes and cleared by local read-enable cycles.

Key Specifications

Pinout & Package

100-pin TQFP (PN100), 14 mm × 14 mm × 1.4 mm body. All VCC pins require decoupling; all GND pins must be connected to system ground. Pin 1 marked by corner notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with IDT7034S15PF, CY7C024AV-15AXC offers voltage flexibility but removes on-chip semaphore/BUSY logic, increasing BOM count and design complexity; IS61LV25616AL-15TQLI provides higher density but lacks dual-port capability entirely - making it incompatible for true inter-processor shared-memory use cases.

Availability

IDT7034S15PF is available at Aetrix Electronics and suitable for industrial PLC communication modules, avionics flight control interfaces, and telecom baseband processor bridges requiring stable component supply despite end-of-life status.

Supply support for IDT7034S15PF 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 in 2019. IDT pioneered high-performance dual-port SRAM architectures for real-time embedded systems.

The IDT7034S15PF belongs to IDT's legacy high-speed dual-port SRAM product line, designed specifically for deterministic inter-processor communication in safety-critical and low-latency embedded applications where hardware arbitration and sub-20 ns access are mandatory.

FAQ

What is the maximum operating temperature range for IDT7034S15PF?

IDT7034S15PF is rated for commercial temperature range only: 0°C to +70°C. The industrial-grade variant is IDT7034S20PF (20 ns access, –40°C to +85°C). Using IDT7034S15PF outside 0°C–70°C violates datasheet specifications and may cause timing violations or data retention failure.

Does IDT7034S15PF support battery backup operation?

Yes - IDT7034S15PF supports data retention at VCC ≥ 2.0 V with ICCDR ≤ 1500 µA (typical). This allows connection to a backup battery or supercapacitor to preserve memory contents during main power loss, critical for systems requiring non-volatile state hold.

How does the BUSY arbitration work on IDT7034S15PF?

When configured as master (M/S = VIH), IDT7034S15PF asserts BUSYL/BUSYR within tBAA ≤ 15 ns if both ports access the same address. The BUSY signal gates internal write paths - preventing corrupted writes during contention. In slave mode (M/S = VIL), BUSY becomes a write-inhibit input.

Can IDT7034S15PF be used in a 36-bit data bus configuration?

Yes - IDT7034S15PF supports width expansion via MASTER/SLAVE cascading. One device operates as master (M/S = VIH) to generate BUSY arbitration signals; others operate as slaves (M/S = VIL) using BUSY as write-enable gate. This scales data width to 36 bits or more without external glue logic.

What are the interrupt mailbox addresses for IDT7034S15PF?

IDT7034S15PF uses fixed interrupt mailbox addresses: left-port interrupt flag (INTL) is set when the right port writes to address FFEh, and right-port flag (INTR) is set when the left port writes to FFFh. Both are cleared by local read cycles with OE enabled at those addresses.