Renesas HI1-0546-5

Overview

HI1-0546-5 from Intersil is a single 16-channel CMOS analog multiplexer with active overvoltage protection, ±15V analog signal range, guaranteed r_ON matching (±7%), and break-before-make switching. It operates from -55°C to +125°C in a 28-lead CERDIP package and is used in high-reliability data acquisition systems interfacing external sensors.

For engineers reviewing the HI1-0546-5 datasheet, HI1-0546-5 pinout, HI1-0546-5 application, or HI1-0546-5 equivalent, key selection criteria include its 70V_P-P analog overvoltage tolerance, 500ns typical access time, ±20V absolute analog input rating, and dielectrically isolated CMOS process enabling fault resilience in mixed-supply industrial environments.

Technical Context

The HI1-0546-5 integrates active clamp circuitry that isolates faulted channels without disturbing signal integrity on other paths, sustaining continuous ±33V analog overvoltage while limiting off-state leakage to 4nA. Its decoder/driver architecture uses level-shifted TTL-compatible address inputs (A0–A3) and enable control to select one of 16 inputs to a common output.

Dielectric isolation prevents latch-up and enables operation across wide supply ranges (±15V typical, up to ±22V), with internal 1kΩ current-limiting resistors protecting inputs during supply loss. The device implements true break-before-make switching with 80ns typical t_OPEN, ensuring no channel-to-channel crosstalk during transitions.

Key Specifications

Pinout & Package

HI1-0546-5 is housed in a 28-lead Ceramic Dual-In-Line Package (CERDIP) with frit seal, rated for -55°C to +125°C operation and qualified per MIL-STD-883. The package provides hermetic reliability and low thermal resistance (θ_JA = 55°C/W, θ_JC = 18°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HI1-0546-5, HI1-0548-2 offers identical fault resilience in a smaller package but halves channel count, while ADG506AKRZ trades overvoltage immunity for lower r_ON and broader commercial temperature support - making HI1-0546-5 uniquely suited for high-reliability, high-transient industrial and aerospace signal routing.

Availability

HI1-0546-5 is available at Aetrix Electronics and suitable for industrial data acquisition, aerospace sensor conditioning, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for HI1-0546-5 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 is a leader in precision analog and power management ICs, now part of Renesas Electronics, with deep expertise in high-reliability, radiation-tolerant, and MIL-qualified components.

The HI-546 family was designed specifically for fault-tolerant analog signal routing in harsh environments - emphasizing overvoltage resilience, channel isolation, and hermetic packaging for mission-critical industrial and defense applications.

FAQ

What is the maximum analog input voltage the HI1-0546-5 can withstand without damage?

The HI1-0546-5 can withstand continuous analog input voltages up to ±33V relative to its supplies (70V_P-P) without damage or signal path disruption. This is enabled by integrated active clamp circuitry and 1kΩ series protection resistors on each input. Operation remains functional within ±15V analog signal range under normal ±15V supply conditions, and the device maintains <4nA off-leakage even during overvoltage events. HI1-0546-5 is specified for this performance across its full -55°C to +125°C operating range.

Does the HI1-0546-5 require external protection diodes when interfacing with external sensors?

No, the HI1-0546-5 does not require external protection diodes due to its built-in active overvoltage protection circuitry. Each analog input includes clamping structures and 1kΩ series resistors that limit current during ±33V transients, preventing damage and eliminating channel interaction. This integrated protection simplifies design, reduces bill-of-materials cost, and improves reliability in systems connecting to externally powered or field-installed sensors. HI1-0546-5 delivers this capability without compromising r_ON matching or access time.

What is the purpose of the VREF pin on the HI1-0546-5?

The VREF pin on the HI1-0546-5 sets the reference voltage for the internal level shifter that conditions digital address and enable inputs. When logic high levels exceed 6V, VREF must be tied to that voltage to ensure proper decoding; otherwise, it is left open for standard TTL/CMOS inputs (0.8V/4.0V thresholds). This dual-mode interface allows compatibility with both 5V logic families and higher-voltage control systems. HI1-0546-5 uses VREF to maintain noise margin and switching accuracy across its full operating temperature range.

How does the HI1-0546-5 achieve break-before-make switching, and why is it important?

The HI1-0546-5 achieves break-before-make switching through an internal decoder architecture that guarantees a minimum 80ns gap (t_OPEN) between turn-off of the previously selected channel and turn-on of the newly addressed channel. This prevents momentary shorting between analog inputs, which could cause signal corruption, ground loops, or damage in systems with mismatched source impedances. HI1-0546-5 implements this timing deterministically across temperature and supply variations, making it essential for high-accuracy multiplexed data acquisition where channel crosstalk must be eliminated.

Is the HI1-0546-5 compatible with modern Pb-free reflow soldering processes?

Yes, the HI1-0546-5 is supplied in a Pb-free plus anneal CERDIP package compliant with RoHS and qualified for Pb-free reflow soldering. Its 100% matte tin termination finish meets IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for peak reflow temperatures up to 260°C. Unlike Pb-free PDIP variants, the CERDIP package is fully compatible with standard convection reflow profiles - no wave soldering restriction applies. HI1-0546-5 maintains its hermetic seal and electrical specifications after reflow, supporting automated assembly in high-reliability manufacturing.