X9315WST2 Digital Potentiometer Equivalent & Substitute Parts

Part Overview

The X9315WST2 is a digital potentiometer manufactured by Renesas Electronics Corporation, featuring 10kΩ resistance with 32 taps and Up/Down (U/D, INC, CS) interface control. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part operates at 5V supply voltage with linear taper configuration and non-volatile memory, suitable for precision analog signal adjustment applications in data acquisition systems.

Key Parameters

Parameter	Value
Resistance (Ohms)	10k
Number of Taps	32
Interface Type	Up/Down (U/D, INC, CS)
Memory Type	Non-Volatile
Voltage - Supply	5V
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
Operating Temperature	0°C ~ 70°C
Tolerance	±20%
Temperature Coefficient (Typ)	±300ppm/°C

Substitute Part Grouping Explanation

Substitution for the X9315WST2 is determined by strict equivalence across the following critical parameters:

Resistance value: 10kΩ (exact match required)
Number of taps: 32 (exact match required)
Interface protocol: Up/Down (U/D, INC, CS) (exact match required)
Memory type: Non-Volatile (exact match required)
Supply voltage: 5V (exact match required)
Package: 8-SOIC (exact match required)
Taper: Linear (exact match required)
Configuration: Single circuit potentiometer (exact match required)

Substitutes are classified into two categories: Direct Manufacturer Substitutes (same base part number with different packaging) and Parametric Equivalents (different base part number but identical electrical specifications). Packaging variations (Tape & Reel, Cut Tape, Digi-Reel) do not affect electrical compatibility.

Parameter Comparison

Parameter	X9315WST2	X9315WSZT1	X9313WSZT1
Manufacturer	Renesas Electronics	Renesas Electronics	Renesas Electronics
Resistance (Ohms)	10k	10k	10k
Number of Taps	32	32	32
Interface	Up/Down (U/D, INC, CS)	Up/Down (U/D, INC, CS)	Up/Down (U/D, INC, CS)
Memory Type	Non-Volatile	Non-Volatile	Non-Volatile
Voltage - Supply	5V	5V	5V
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SOIC	8-SOIC	8-SOIC
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Tolerance	±20%	±20%	±20%
Temperature Coefficient (Typ)	±300ppm/°C	±300ppm/°C	±300ppm/°C
Resistance - Wiper (Ohms) (Typ)	200	200	40
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Inventory Availability	754 Pcs	1145 Pcs	5176 Pcs

Engineering Selection Recommendations

X9315WSZT1 is the primary direct substitute for X9315WST2. Both parts share the same base part number (X9315) and are manufactured by Renesas Electronics. The X9315WSZT1 offers improved compliance status (ROHS3 Compliant versus RoHS non-compliant) and superior moisture sensitivity rating (MSL 1 Unlimited versus MSL 3 168 Hours). The X9315WSZT1 maintains active product status, ensuring long-term availability and supply chain stability compared to the obsolete X9315WST2.

X9313WSZT1 is a parametric equivalent with identical electrical specifications across all critical parameters. The primary distinction is the wiper resistance (40Ω typical versus 200Ω typical), which does not affect functional substitution for standard applications. X9313WSZT1 also provides ROHS3 compliance and MSL 1 rating. This part offers the highest inventory availability (5176 Pcs) and is available in Cut Tape and Digi-Reel packaging formats.

Selection between X9315WSZT1 and X9313WSZT1 depends on wiper resistance requirements for specific circuit implementations. Both parts are active products with superior compliance certifications and moisture sensitivity ratings compared to the obsolete X9315WST2.

Frequently Asked Questions (FAQ)

Q: Can X9315WSZT1 directly replace X9315WST2 in existing designs?

A: Yes. X9315WSZT1 is electrically and mechanically identical to X9315WST2 across all critical parameters: 10kΩ resistance, 32 taps, Up/Down interface, non-volatile memory, 5V supply, and 8-SOIC package. The primary advantages are active product status, ROHS3 compliance, and improved moisture sensitivity rating (MSL 1 versus MSL 3).

Q: What is the difference between X9315WSZT1 and X9313WSZT1?

A: Both parts are parametrically equivalent with identical resistance, tap count, interface, memory type, supply voltage, and package. The difference is wiper resistance: X9315WSZT1 has 200Ω typical wiper resistance, while X9313WSZT1 has 40Ω typical wiper resistance. Selection depends on circuit requirements for wiper impedance.

Q: Are packaging format differences between these substitutes significant?

A: Packaging format (Tube, Tape & Reel, Cut Tape, Digi-Reel) affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility. All formats contain identical components in the same 8-SOIC package.

Q: Why is X9315WST2 listed as obsolete?

A: X9315WST2 is obsolete per manufacturer status. Active alternatives (X9315WSZT1 and X9313WSZT1) are available from Renesas Electronics with improved compliance and availability characteristics.

Q: Do all three parts meet current RoHS requirements?

A: X9315WSZT1 and X9313WSZT1 are ROHS3 Compliant. X9315WST2 is RoHS non-compliant. For new designs and applications requiring RoHS compliance, X9315WSZT1 or X9313WSZT1 are required.

Q: What is the moisture sensitivity difference between these parts?

A: X9315WST2 has MSL 3 (168 Hours maximum floor life). X9315WSZT1 and X9313WSZT1 have MSL 1 (Unlimited floor life). MSL 1 rating provides superior protection against moisture absorption during storage and handling.

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