AS3932-BTST Equivalent & Substitute Parts

Part Overview

The AS3932-BTST is an RFID Reader IC manufactured by ScioSense, designed for low-frequency RFID applications operating in the 110kHz to 150kHz frequency band. This component integrates SPI interface communication with a 2.4V to 3.6V supply voltage range, housed in a 16-TSSOP surface mount package. The product is currently marked as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and component procurement.

Substiute Parts

AS3932-BTST

ScioSenseIn Stock: 5669AS3932-BTST Datasheet

Current PartRFQ

AS3932-BQFT

ScioSenseIn Stock: 31976AS3932-BQFT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the AS3932-BTST is determined by strict equivalence across the following critical parameters:

• Frequency Range: 110kHz ~ 150kHz (exact match required)
• Interface Protocol: SPI (exact match required)
• Supply Voltage Range: 2.4V ~ 3.6V (exact match required)
• Operating Temperature Range: -40°C ~ 85°C (exact match required)
• Mounting Type: Surface Mount (exact match required)
• RoHS Compliance: RoHS Compliant (exact match required)
• Moisture Sensitivity Level: 3 (168 Hours) (exact match required)

The AS3932-BQFT meets all substitution criteria. While the package format differs (16-VQFN Exposed Pad versus 16-TSSOP), both packages are surface mount configurations with compatible pin counts and electrical characteristics. The functional performance, electrical specifications, and environmental ratings remain identical.

Parameter Comparison

Engineering Selection Recommendations

The AS3932-BQFT serves as a direct functional equivalent to the AS3932-BTST. Both components share identical electrical specifications, frequency range, interface protocol, and environmental operating parameters. The primary design consideration is package format: the AS3932-BQFT uses a 16-VQFN Exposed Pad configuration instead of the 16-TSSOP format of the original part.

Both components maintain RoHS compliance and identical moisture sensitivity ratings. The AS3932-BQFT is marked as "Not For New Designs," indicating limited future availability, while the AS3932-BTST is marked as "Obsolete." For applications requiring this RFID reader functionality, component selection should prioritize current inventory availability and PCB layout compatibility with the respective package formats.

Frequently Asked Questions (FAQ)

Q: Can the AS3932-BQFT directly replace the AS3932-BTST in existing designs?

A: Electrical substitution is complete. The AS3932-BQFT maintains identical frequency range, SPI interface, supply voltage, and operating temperature specifications. PCB layout modification is required due to package format differences (16-VQFN Exposed Pad versus 16-TSSOP).

Q: What is the primary difference between these two parts?

A: The AS3932-BTST uses a 16-TSSOP package (0.173" width, 4.40mm), while the AS3932-BQFT uses a 16-VQFN Exposed Pad package (4x4mm). All electrical and functional specifications are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the AS3932-BTST and AS3932-BQFT are RoHS Compliant with identical Moisture Sensitivity Level 3 (168 Hours) ratings.

Q: Why is the AS3932-BTST marked as Obsolete?

A: The Obsolete status indicates the manufacturer has discontinued production. The AS3932-BQFT, marked as "Not For New Designs," represents the transition phase before full discontinuation.

Q: What are the critical parameters for substitution?

A: Frequency range (110kHz ~ 150kHz), SPI interface, supply voltage (2.4V ~ 3.6V), operating temperature (-40°C ~ 85°C), and RoHS compliance must remain constant for functional equivalence.