Renesas HI1-0506A-5

Overview

HI1-0506A-5 from Intersil is a single 16-channel CMOS analog multiplexer with active overvoltage protection, designed for high-reliability data acquisition in mixed-supply systems. It supports ±15V analog signal range, withstands continuous 70V_P-P overvoltage, features 500ns access time, and operates across 0°C to +75°C. Its primary role is fault-tolerant channel selection in industrial telemetry interfaces where external sensors may exceed supply rails.

For engineers reviewing the HI1-0506A-5 datasheet, HI1-0506A-5 pinout, HI1-0506A-5 application, or HI1-0506A-5 equivalent, key selection criteria include its 28-lead CERDIP package, break-before-make switching, 1.5kΩ typical on-resistance, fail-safe behavior during power loss, and compatibility with TTL/DTL logic drive via internal level shifters.

Technical Context

The HI1-0506A-5 implements dielectrically isolated CMOS (CMOS-DI) technology with dedicated overvoltage clamp circuitry that isolates faulted inputs without disturbing other channels. Its decoder/driver stage accepts four address bits (A0–A3) and an enable signal to select one of 16 analog inputs to a common output.

Signal integrity under fault is maintained by 1kΩ input resistance during supply loss and bidirectional clamping diodes that limit analog input voltage to (V−) −20V and (V+) +20V. Digital inputs tolerate faults up to 4V beyond either supply rail, and the device exhibits no latch-up under overvoltage or power-loss conditions.

Key Specifications

Pinout & Package

HI1-0506A-5 is housed in a 28-lead Ceramic Dual-In-Line Package (CERDIP) per drawing F28.6, featuring hermetic sealing, frit-sealed ceramic lid, and gold-plated leads suitable for high-reliability military and aerospace applications.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplexer applications.

Compared with HI1-0506A-2 and HI3-0506A-5, the HI1-0506A-5 offers the optimal balance of commercial temperature range, hermetic CERDIP reliability, and proven field performance in telemetry and control systems without requiring burn-in overhead or plastic-package derating.

Availability

HI1-0506A-5 is available at Aetrix Electronics and suitable for data acquisition systems, industrial controls, and telemetry interfaces requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for HI1-0506A-5 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

Intersil Corporation, now part of Renesas Electronics, specializes in high-performance analog and mixed-signal ICs for demanding industrial, aerospace, and defense applications.

The HI-506A family was engineered specifically for fault-tolerant analog signal routing in harsh environments where external sensor overvoltage, supply loss, and EMI are persistent design constraints.

FAQ

What is the maximum analog overvoltage the HI1-0506A-5 can sustain continuously?

The HI1-0506A-5 sustains continuous ±33V analog overvoltage relative to its supplies, with full 70V_P-P capability under specified conditions. This is achieved via integrated clamp circuitry that limits input current to <4nA at 25°C and <2µA over temperature-ensuring no degradation of adjacent channels or output fidelity. The HI1-0506A-5 maintains this protection without external components.

Does the HI1-0506A-5 require external pull-up resistors on its address lines?

No, the HI1-0506A-5 includes internal level-shifting circuitry that accepts standard TTL/DTL logic levels. However, Intersil recommends using 1kΩ pull-up resistors to +5V on digital inputs when driving from DTL/TTL sources to ensure reliable VAH recognition at 4.0V. This requirement applies only when VREF is left open; tying VREF to +5V removes the need for external pull-ups for logic levels ≤6V.

How does the HI1-0506A-5 behave during complete power loss?

During total power loss, the HI1-0506A-5 enters a fail-safe state where each analog input presents 1kΩ resistance to external sources-preventing back-driving and eliminating latch-up risk. This behavior is intrinsic to its dielectrically isolated CMOS process and requires no external circuitry. The HI1-0506A-5 remains electrically benign even if sensors remain powered while the multiplexer supply is removed.

What is the significance of the "A" suffix in HI1-0506A-5?

The "A" in HI1-0506A-5 denotes the second-generation revision of the HI-506 product family, incorporating improved overvoltage clamp response, tighter on-resistance matching (<10% variation), and enhanced ESD robustness per HBM Class 2. This revision supersedes the original HI-506 and is the only version currently manufactured and supported by Intersil/Renesas for new designs.

Can the HI1-0506A-5 be used with ±12V supplies instead of ±15V?

Yes, the HI1-0506A-5 operates reliably with ±12V supplies, delivering 1.2kΩ typical on-resistance and maintaining full 70V_P-P overvoltage capability. Electrical specifications are characterized at ±15V but remain valid across the full ±5V to ±22V supply range (V+ to GND ≤ +22V, V− to GND ≥ −25V). Performance curves in the HI1-0506A-5 datasheet confirm normalized r_ON stability down to ±10V.