X9C104PI Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The X9C104PI is a digital potentiometer manufactured by Renesas Electronics Corporation, featuring 100k Ohm resistance with 100 taps and Up/Down (U/D, INC, CS) interface control. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part operates on 5V supply with non-volatile memory, suitable for applications requiring programmable resistance adjustment in 8-PDIP through-hole packaging.

Substiute Parts

X9C104PI

Renesas Electronics CorporationIn Stock: 1011X9C104PI Datasheet

Current PartRFQ

DS1804-100+

Analog Devices Inc./Maxim IntegratedIn Stock: 3808DS1804-100+ Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the X9C104PI is determined by strict equivalence across the following critical parameters:

• Resistance value: 100k Ohm (exact match required)
• Number of taps: 100 (exact match required)
• Interface protocol: Up/Down (U/D, INC, CS) (exact match required)
• Memory type: Non-Volatile (exact match required)
• Package: 8-DIP through-hole (exact match required)
• Taper characteristic: Linear (exact match required)

The DS1804-100+ meets all substitution criteria. While secondary parameters such as supply voltage range, temperature coefficient, and wiper resistance differ, these variations remain within acceptable operational boundaries for applications originally designed for the X9C104PI.

Parameter Comparison

Engineering Selection Recommendations

The DS1804-100+ serves as the primary functional equivalent for the obsolete X9C104PI. Selection between these components should be based on the following engineering criteria:

For direct replacement in existing designs: The DS1804-100+ is suitable for applications where the X9C104PI is currently deployed. The identical interface protocol, resistance value, tap count, and package ensure pin-compatible operation. The wider supply voltage range (2.7V ~ 5.5V) of the DS1804-100+ provides additional design flexibility compared to the X9C104PI's fixed 5V requirement.

For new designs: The DS1804-100+ is the recommended choice due to its active product status and ROHS3 compliance. The component is currently manufactured and available in production quantities.

Compliance considerations: The X9C104PI is RoHS non-compliant and obsolete. The DS1804-100+ is ROHS3 compliant and actively supported, making it the appropriate selection for applications subject to RoHS regulations or requiring long-term component availability.

Secondary parameter differences: The DS1804-100+ exhibits a higher temperature coefficient (750ppm/°C versus ±300ppm/°C) and higher typical wiper resistance (400 Ohms versus 40 Ohms). These differences should be evaluated within the context of specific application requirements, particularly in precision analog circuits where temperature stability or wiper impedance are critical parameters.

Frequently Asked Questions (FAQ)

Q: Can the DS1804-100+ be used as a direct replacement for the X9C104PI in existing PCB designs?

A: Yes. Both components share identical 8-DIP package dimensions (0.300", 7.62mm), through-hole mounting, and Up/Down (U/D, INC, CS) interface protocol. Pin-for-pin compatibility is confirmed. No PCB modifications are required.

Q: What are the key differences between the X9C104PI and DS1804-100+?

A: The primary differences are: (1) Supply voltage range—X9C104PI requires 5V, while DS1804-100+ operates across 2.7V to 5.5V; (2) Temperature coefficient—X9C104PI is ±300ppm/°C, DS1804-100+ is 750ppm/°C; (3) Wiper resistance—X9C104PI is 40 Ohms typical, DS1804-100+ is 400 Ohms typical; (4) Product status—X9C104PI is obsolete, DS1804-100+ is active; (5) RoHS compliance—X9C104PI is non-compliant, DS1804-100+ is ROHS3 compliant.

Q: Are there any circuit design considerations when switching from X9C104PI to DS1804-100+?

A: The higher wiper resistance of the DS1804-100+ (400 Ohms versus 40 Ohms) may affect circuit impedance in applications sensitive to source impedance. The wider temperature coefficient of the DS1804-100+ should be evaluated in precision applications requiring tight temperature stability. Both components maintain identical resistance value, tap count, and interface protocol, ensuring functional compatibility in standard applications.

Q: Why is the X9C104PI listed as obsolete?

A: The X9C104PI is an older Renesas Electronics design. The DS1804-100+ from Analog Devices Inc./Maxim Integrated represents the current-generation equivalent, offering improved compliance status, wider supply voltage range, and active manufacturing support.

Q: Is the DS1804-100+ available in the same packaging options as the X9C104PI?

A: Both components are available in 8-DIP through-hole packaging with identical physical dimensions. The DS1804-100+ is supplied in tube packaging format.

Q: What is the impact of the different temperature coefficients on system performance?

A: The X9C104PI temperature coefficient of ±300ppm/°C is tighter than the DS1804-100+ at 750ppm/°C. In applications operating across the full -40°C to 85°C temperature range (125°C span), the DS1804-100+ will exhibit greater resistance variation. For applications where resistance stability across temperature is critical, this difference should be evaluated against specific system requirements.