DS1834S/T&R Equivalent & Substitute Parts

Part Overview

The DS1834S/T&R is a multi-voltage supervisor IC from Analog Devices Inc./Maxim Integrated, designed for power management applications requiring dual-channel voltage monitoring. This component operates as a Push-Pull, Totem Pole output supervisor with active-low reset functionality, housed in an 8-SOIC surface mount package. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

DS1834S/T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 992DS1834S/T&R Datasheet

Current PartRFQ

DS1834S+T&R

Analog Devices Inc./Maxim IntegratedIn Stock: 1176DS1834S+T&R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DS1834S/T&R is determined by the following critical parameters:

• Dual-channel voltage monitoring capability with 3.3V and 5V threshold support
• Active-low reset output with 200ms minimum timeout
• 8-SOIC surface mount package for PCB compatibility
• Operating temperature range of -40°C to 85°C
• Output stage configuration (Push-Pull/Totem Pole vs. Open Drain/Open Collector)

The DS1834S+T&R qualifies as a direct substitute based on matching all core functional parameters: identical voltage thresholds, reset logic, timeout specification, package geometry, and operating temperature range. The primary distinction lies in output configuration and product status compliance.

Parameter Comparison

Engineering Selection Recommendations

The DS1834S+T&R is the direct functional equivalent of the DS1834S/T&R. Selection of the substitute part is justified on the following grounds:

• Product Status: The main part is obsolete, while the substitute maintains active product status, ensuring long-term availability and supply chain continuity.
• Regulatory Compliance: The substitute achieves ROHS3 compliance, whereas the main part is RoHS non-compliant. This distinction is critical for applications subject to environmental regulations.
• Functional Equivalence: Both parts share identical voltage monitoring thresholds, reset timing, package geometry, and operating temperature specifications.
• Output Stage Difference: The substitute employs Open Drain or Open Collector output configuration instead of Push-Pull/Totem Pole. Circuit designs must accommodate this output stage difference through appropriate pull-up resistor implementation if required by the application.

Frequently Asked Questions (FAQ)

Q: Can DS1834S+T&R directly replace DS1834S/T&R without circuit modifications?

A: Functional replacement is possible with consideration of output stage differences. The DS1834S+T&R uses Open Drain or Open Collector output, whereas the original uses Push-Pull/Totem Pole. Applications relying on push-pull drive capability may require circuit redesign to incorporate external pull-up resistors.

Q: What is the significance of the packaging designation difference (S/T&R vs. S+T&R)?

A: Both designations indicate Tape & Reel packaging for surface mount assembly. The difference in notation reflects manufacturer documentation conventions and does not affect physical package dimensions or PCB compatibility.

Q: Are the voltage threshold specifications identical between the two parts?

A: Yes. Both the DS1834S/T&R and DS1834S+T&R monitor identical voltage thresholds of 3.3V and 5V with matching reset timeout of 200ms minimum and active-low reset logic.

Q: Why is RoHS compliance important for this substitution?

A: RoHS compliance is mandatory for products destined for markets with environmental regulations. The substitute's ROHS3 compliance ensures compatibility with modern procurement standards and regulatory requirements, whereas the obsolete main part's non-compliance may restrict its use in new designs.

Q: Is the 8-SOIC package footprint identical for both parts?

A: Yes. Both parts use the 8-SOIC package with 0.154" (3.90mm) width, ensuring identical PCB footprint and assembly compatibility.

Q: What operating conditions are supported by both parts?

A: Both parts operate across the temperature range of -40°C to 85°C (TA) with MSL rating of 1 (Unlimited moisture sensitivity level), providing identical environmental performance specifications.