DS1845E-050 Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The DS1845E-050 is a digital potentiometer IC manufactured by Analog Devices Inc./Maxim Integrated, classified as a data acquisition component. This 50kΩ dual-circuit device features an I2C interface with 100 and 256 tap configurations, housed in a 14-TSSOP surface mount package. The main part number DS1845E-050 is currently listed as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs.

Substiute Parts

DS1845E-050

Analog Devices Inc./Maxim IntegratedIn Stock: 2420DS1845E-050 Datasheet

Current PartRFQ

DS1845E-050+

Analog Devices Inc./Maxim IntegratedIn Stock: 2708DS1845E-050+ Datasheet

DirectRFQ

DS1855E-050+

Analog Devices Inc./Maxim IntegratedIn Stock: 2303DS1855E-050+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DS1845E-050 is determined by strict equivalence across the following critical parameters:

Core Electrical Parameters: Resistance value (50kΩ), number of circuits (2), tap configuration (100, 256 taps), interface protocol (I2C), and supply voltage range (2.7V ~ 5.5V) must remain identical.

Mechanical Compatibility: Package type (14-TSSOP) and mounting method (surface mount) must match to ensure PCB compatibility without redesign.

Environmental Specifications: Operating temperature range (-40°C ~ 85°C), tolerance (±20%), and temperature coefficient (750ppm/°C) define functional equivalence under specified conditions.

Memory and Features: Non-volatile memory type and selectable address feature must be present in substitute parts.

Based on these criteria, two substitute parts are identified: DS1845E-050+ (direct packaging variant) and DS1855E-050+ (parametric equivalent with differing wiper resistance).

Parameter Comparison

Engineering Selection Recommendations

DS1845E-050+ (Direct Substitute): This part is the primary replacement for the obsolete DS1845E-050. It maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The packaging format (Tube) differs from the main part but does not affect functional compatibility. This variant is recommended for direct substitution in new designs and production runs.

DS1855E-050+ (Parametric Equivalent): This part provides functional equivalence with one specification variance: typical wiper resistance of 400Ω compared to 500Ω in the main part. All other critical parameters remain identical. This part is also active and ROHS3 compliant. Selection of this variant depends on circuit requirements regarding wiper resistance tolerance and its impact on application performance.

Both substitute parts are manufactured by the same supplier, ensuring consistency in quality and reliability standards. The transition from the obsolete DS1845E-050 to either active substitute part eliminates supply chain risk and ensures compliance with current environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can DS1845E-050+ be used as a direct replacement for DS1845E-050? A: Yes. DS1845E-050+ maintains all critical electrical and mechanical parameters identical to the main part. The primary difference is product status (active vs. obsolete) and improved RoHS compliance. Packaging format change (Tube) does not affect functional compatibility.

Q: What is the difference between DS1845E-050+ and DS1855E-050+? A: Both parts share identical core specifications (50kΩ resistance, 2 circuits, I2C interface, 14-TSSOP package). The distinction is the typical wiper resistance: DS1845E-050+ has 500Ω while DS1855E-050+ has 400Ω. This parameter difference may affect circuit performance depending on application requirements.

Q: Are both substitute parts compatible with existing PCB designs? A: Yes. Both DS1845E-050+ and DS1855E-050+ use the 14-TSSOP surface mount package with identical pin configuration and footprint. No PCB redesign is required for either substitute.

Q: What compliance certifications apply to the substitute parts? A: Both DS1845E-050+ and DS1855E-050+ are ROHS3 compliant and REACH unaffected. The original DS1845E-050 is RoHS non-compliant, making the substitutes preferable for applications requiring environmental regulation adherence.

Q: How does the wiper resistance difference affect part selection? A: Wiper resistance (500Ω vs. 400Ω) impacts circuit loading and signal integrity in specific applications. Selection between DS1845E-050+ and DS1855E-050+ should be based on circuit design requirements and tolerance specifications for wiper resistance.

Q: Are inventory levels sufficient for both substitute parts? A: Current inventory shows DS1845E-050+ with 2,684 pieces and DS1855E-050+ with 2,240 pieces in stock, providing adequate supply for procurement planning.