HT506DC Equivalent & Substitute Parts

Part Overview

The HT506DC is a high-temperature analog multiplexer IC manufactured by Honeywell Aerospace, designed for 16:1 multiplexing applications in extreme temperature environments. This component is classified as an Interface IC with a 16-channel single multiplexer/demultiplexer circuit in a 28-DIP package.

The HT506DC operates across an extended temperature range of -55°C to 225°C, making it suitable for aerospace and high-temperature industrial applications. However, the product status is listed as Obsolete, necessitating the identification of functionally equivalent active alternatives for new designs and ongoing system support.

Substiute Parts

HT506DC

Honeywell AerospaceIn Stock: 799HT506DC Datasheet

Current PartRFQ

ADG506ATQ

Analog Devices Inc.In Stock: 2158ADG506ATQ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the HT506DC is determined by the following critical parameters:

Functional Equivalence Requirements:

• Multiplexer/Demultiplexer circuit configuration: 16:1
• Number of circuits: 1
• Package type: 28-CDIP (compatible with 28-DIP footprint)
• Mounting type: Through Hole

Electrical Compatibility Criteria:

• On-state resistance within acceptable tolerance for the application
• Supply voltage compatibility or step-up capability
• Operating temperature range sufficient for the intended application

The ADG506ATQ from Analog Devices Inc. meets the functional multiplexer configuration (16:1, 1 circuit) and package requirements (28-CDIP). However, critical differences exist in supply voltage specifications and maximum operating temperature, which must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The ADG506ATQ is functionally equivalent to the HT506DC for 16:1 multiplexing applications in 28-DIP package form factor. Both components share identical multiplexer circuit configuration and through-hole mounting characteristics.

Critical Limitations:

1. Operating Temperature Range: The ADG506ATQ maximum operating temperature is 125°C, which is 100°C lower than the HT506DC specification of 225°C. Applications requiring operation above 125°C cannot use the ADG506ATQ as a direct substitute.

2. Supply Voltage: The ADG506ATQ requires 10.8V to 16.5V single supply or ±10.8V to ±16.5V dual supply, whereas the HT506DC operates on 5V single supply. Circuit redesign or voltage regulation is necessary for compatibility.

3. On-State Resistance: The ADG506ATQ provides superior performance with 300Ω maximum on-state resistance compared to the HT506DC at 400Ω, representing a 25% improvement in switch conductivity.

4. Compliance Status: The ADG506ATQ is ROHS3 compliant and Active product status, whereas the HT506DC is Obsolete and RoHS non-compliant. For new designs and regulated applications, the ADG506ATQ is the preferred selection.

Application-Specific Considerations:

• For high-temperature applications exceeding 125°C, alternative high-temperature multiplexer solutions must be sourced.
• For 5V single-supply systems, power supply modification or alternative components must be evaluated.
• For applications with existing 5V infrastructure, the voltage incompatibility requires circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the ADG506ATQ directly replace the HT506DC in existing designs?

A: Direct replacement is not possible without circuit modifications. The ADG506ATQ requires higher supply voltages (10.8V to 16.5V) compared to the HT506DC (5V), and has a lower maximum operating temperature (125°C vs. 225°C). Physical package compatibility exists (28-DIP/28-CDIP), but electrical redesign is necessary.

Q: What is the primary reason the HT506DC requires substitution?

A: The HT506DC is classified as Obsolete product status. The ADG506ATQ provides an active, commercially available alternative with improved on-state resistance performance and modern RoHS3 compliance.

Q: Are there applications where the ADG506ATQ cannot substitute for the HT506DC?

A: Yes. Applications requiring operation above 125°C ambient temperature cannot use the ADG506ATQ. High-temperature aerospace and industrial applications operating in the 125°C to 225°C range require alternative component selection or continued use of the HT506DC if available from inventory.

Q: What is the package compatibility between HT506DC and ADG506ATQ?

A: Both components use 28-pin DIP packages with identical 0.600" (15.24mm) body dimensions. The HT506DC uses 28-DIP designation while the ADG506ATQ uses 28-CDIP designation. These are mechanically compatible for through-hole PCB mounting.

Q: How does the on-state resistance difference affect circuit performance?

A: The ADG506ATQ on-state resistance of 300Ω is lower than the HT506DC specification of 400Ω. This 100Ω difference reduces signal attenuation and improves bandwidth performance in multiplexing applications. For applications sensitive to on-state resistance, the ADG506ATQ provides superior electrical characteristics.

Q: What compliance advantages does the ADG506ATQ offer?

A: The ADG506ATQ is ROHS3 compliant and carries Active product status with ongoing manufacturer support. The HT506DC is RoHS non-compliant and Obsolete. For regulated industries and new product certifications, the ADG506ATQ meets current environmental and supply-chain requirements.