DS1867E-10 Equivalent & Substitute Parts

Part Overview

The DS1867E-10 is a digital potentiometer manufactured by Analog Devices Inc./Maxim Integrated, designed for data acquisition applications requiring programmable resistance control. This component features a 10kΩ resistance value with 256 taps, dual-circuit configuration, and serial interface control. The DS1867E-10 is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Resistance (Ohms)	10k
Number of Circuits	2
Number of Taps	256
Interface Type	Serial
Memory Type	Non-Volatile
Voltage Supply	5V
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-TSSOP

Substitute Part Grouping Explanation

Substitution of the DS1867E-10 is determined by the following critical parameters:

Resistance Value: Must be 10kΩ
Number of Circuits: Must be 2
Number of Taps: Must be 256
Memory Type: Must be Non-Volatile
Operating Temperature Range: Must support -40°C ~ 85°C
Voltage Supply Compatibility: Substitute must operate within or encompass the 5V supply requirement
Interface Type: Serial or SPI protocols are functionally compatible for digital control applications
Mounting Type: Surface mount configuration required

The MAX5487ETE+ qualifies as a direct substitute based on matching all critical electrical parameters while offering enhanced specifications in supply voltage range and improved temperature coefficient performance.

Parameter Comparison

Parameter	DS1867E-10	MAX5487ETE+	Compatibility Notes
Resistance (Ohms)	10k	10k	Identical
Number of Circuits	2	2	Identical
Number of Taps	256	256	Identical
Interface	Serial	SPI	Both digital control protocols
Memory Type	Non-Volatile	Non-Volatile	Identical
Voltage Supply	5V	2.7V ~ 5.25V	Substitute supports wider range
Tolerance	±20%	±25%	Substitute tolerance slightly wider
Temperature Coefficient (Typ)	750ppm/°C	35ppm/°C	Substitute offers superior stability
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Resistance - Wiper (Ohms) Typ	400	325	Minor difference in wiper resistance
Package Type	20-TSSOP	16-TQFN (3x3)	Different package; PCB layout modification required
Mounting Type	Surface Mount	Surface Mount	Identical
Product Status	Obsolete	Active	Substitute actively manufactured
RoHS Status	Non-compliant	ROHS3 Compliant	Substitute meets current compliance

Engineering Selection Recommendations

The MAX5487ETE+ serves as the primary substitute for the obsolete DS1867E-10 based on the following factors:

Electrical Compatibility: Both devices maintain identical core specifications for resistance value (10kΩ), circuit count (2), tap resolution (256), and non-volatile memory architecture. The operating temperature range (-40°C ~ 85°C) is identical, ensuring thermal performance equivalence.

Supply Voltage: The MAX5487ETE+ operates across 2.7V to 5.25V, encompassing the DS1867E-10's 5V requirement with additional margin for system flexibility.

Product Status and Availability: The DS1867E-10 is classified as obsolete with limited inventory. The MAX5487ETE+ is actively manufactured with substantial stock availability (272,800 units), ensuring long-term supply chain reliability.

Compliance Status: The MAX5487ETE+ achieves ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The DS1867E-10 is RoHS non-compliant, making the substitute preferable for new designs and compliance-sensitive applications.

Interface Consideration: The DS1867E-10 uses serial interface while the MAX5487ETE+ employs SPI protocol. Both are digital control methods compatible with standard microcontroller implementations, though firmware adaptation may be required.

Package Transition: The substitute requires PCB layout modification due to package change from 20-TSSOP to 16-TQFN (3x3). This is a standard engineering consideration for component obsolescence management.

Frequently Asked Questions (FAQ)

Q: Can the MAX5487ETE+ directly replace the DS1867E-10 without PCB modifications?

A: No. The MAX5487ETE+ uses a 16-TQFN (3x3) package versus the DS1867E-10's 20-TSSOP package. PCB layout redesign is required. However, the electrical functionality is fully compatible.

Q: What is the difference between Serial and SPI interfaces on these devices?

A: Both are digital communication protocols for potentiometer control. Serial interface (DS1867E-10) and SPI interface (MAX5487ETE+) require different firmware implementations but achieve identical functional results. Microcontroller support for both protocols is standard.

Q: Are there any performance differences between these parts?

A: The MAX5487ETE+ offers superior temperature coefficient performance (35ppm/°C versus 750ppm/°C), resulting in better resistance stability across temperature variations. Wiper resistance differs slightly (325Ω versus 400Ω). Tolerance is marginally wider on the substitute (±25% versus ±20%).

Q: Is the MAX5487ETE+ suitable for new designs?

A: Yes. The MAX5487ETE+ is actively manufactured, ROHS3 compliant, and offers improved specifications. It is the recommended choice for new product development requiring 10kΩ dual-circuit digital potentiometer functionality.

Q: What supply voltage should be used with the MAX5487ETE+?

A: The MAX5487ETE+ operates across 2.7V to 5.25V. For applications previously using 5V with the DS1867E-10, 5V operation is fully supported and recommended for compatibility.

Q: Are both devices non-volatile?

A: Yes. Both the DS1867E-10 and MAX5487ETE+ feature non-volatile memory, preserving potentiometer settings during power-down cycles.

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