TL432ACDBZRG4 Equivalent & Substitute Parts

Part Overview

The TL432ACDBZRG4 is a shunt voltage reference IC manufactured by Texas Instruments, designed for adjustable output voltage regulation in power management applications. This component operates with an adjustable output range of 2.495V to 36V, delivering up to 100 mA with ±1% tolerance in a compact SOT-23-3 surface mount package.

The TL432ACDBZRG4 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers including Diodes Incorporated and Fairchild Semiconductor, offering comparable or enhanced electrical characteristics while maintaining mechanical compatibility.

Key Parameters

Parameter	Value
Reference Type	Shunt
Output Type	Adjustable
Voltage - Output (Min/Fixed)	2.495V
Voltage - Output (Max)	36V
Current - Output	100 mA
Tolerance	±1%
Current - Cathode	600 µA
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TL432ACDBZRG4 is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the SOT-23-3 package (TO-236-3, SC-59) to ensure direct PCB footprint compatibility.

Electrical Compatibility: Substitute parts must maintain the adjustable output voltage range (minimum 2.495V to 36V maximum) and deliver 100 mA output current. The tolerance specification (±1% or better) ensures functional equivalence in voltage regulation circuits.

Thermal Operating Range: The original part operates 0°C to 70°C. Substitute parts with extended temperature ranges (-40°C to 125°C) provide enhanced performance margins but remain functionally compatible.

Cathode Current: The original specification requires 600 µA cathode current. Substitute parts with lower cathode current (1 mA, 50 µA) are electrically compatible as they represent different bias point designs within the same functional class.

Compliance: All substitute parts maintain ROHS3 compliance and EAR99 export classification, matching the original part's regulatory status.

Parameter Comparison

Part Number	Manufacturer	Output Voltage (Min)	Output Voltage (Max)	Output Current	Tolerance	Cathode Current	Operating Temperature	Package	Product Status
TL432ACDBZRG4	Texas Instruments	2.495V	36V	100 mA	±1%	600 µA	0°C ~ 70°C	SOT-23-3	Discontinued
TL432ACDBZR	Texas Instruments	2.495V	36V	100 mA	±1%	600 µA	0°C ~ 70°C	SOT-23-3	Active
AS431ANTR-E1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
AS431ANTR-G1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
AS431BNTR-G1	Diodes Incorporated	2.5V	36V	100 mA	±1%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
AS431IANTR-G1	Diodes Incorporated	2.5V	36V	100 mA	±0.5%	50 µA	-40°C ~ 125°C	SOT-23-3	Active
AS431IBNTR-G1	Diodes Incorporated	2.5V	36V	100 mA	±1%	50 µA	-40°C ~ 125°C	SOT-23-3	Active
AZ431AN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±0.4%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
AZ431AN-ATRG1	Diodes Incorporated	2.5V	36V	100 mA	±0.4%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
AZ431BN-ATRE1	Diodes Incorporated	2.5V	36V	100 mA	±0.8%	1 mA	-40°C ~ 125°C	SOT-23-3	Active
LM431SACM32X	Fairchild Semiconductor	2.5V	36V	100 mA	±2%	1 mA	-25°C ~ 85°C	SOT-23-3	Active

Engineering Selection Recommendations

Primary Recommendation: TL432ACDBZR (Texas Instruments) is the direct equivalent to the discontinued TL432ACDBZRG4, offering identical electrical specifications and packaging. This part maintains active product status with substantial inventory availability (50,200 units).

Alternative Selection - Tolerance Priority: AS431ANTR-G1 or AS431ANTR-E1 (Diodes Incorporated) provide ±0.5% tolerance, improving voltage regulation accuracy compared to the original ±1% specification. Both parts maintain 100 mA output current and SOT-23-3 packaging with extended operating temperature range (-40°C to 125°C).

Alternative Selection - Tolerance Match: AS431BNTR-G1 (Diodes Incorporated) matches the original ±1% tolerance while offering extended temperature range and active product status with high inventory (519,400 units).

Alternative Selection - Low Cathode Current: AS431IANTR-G1 or AS431IBNTR-G1 (Diodes Incorporated) feature reduced cathode current (50 µA versus 600 µA), reducing circuit power consumption while maintaining electrical compatibility.

Alternative Selection - Precision Grade: AZ431AN-ATRE1 or AZ431AN-ATRG1 (Diodes Incorporated) deliver ±0.4% tolerance for applications requiring enhanced voltage reference accuracy, with extended temperature range and active status.

All recommended substitutes maintain ROHS3 compliance and SOT-23-3 packaging, ensuring direct PCB compatibility and regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can TL432ACDBZR directly replace TL432ACDBZRG4?

A: Yes. TL432ACDBZR is the active equivalent with identical electrical specifications (2.495V to 36V adjustable output, 100 mA, ±1% tolerance) and SOT-23-3 packaging. The only difference is product status (active versus discontinued).

Q: What is the difference between AS431 and TL432 series parts?

A: Both are adjustable shunt voltage reference ICs with identical output voltage range (2.5V to 36V) and 100 mA output current. Key differences include tolerance grades (AS431 offers ±0.4% to ±1%, TL432 offers ±1%), operating temperature ranges, and cathode current specifications. All maintain SOT-23-3 compatibility.

Q: Are Diodes Incorporated AS431 parts compatible with Texas Instruments TL432 circuits?

A: Yes. AS431 parts are functionally equivalent substitutes with the same adjustable output voltage range, 100 mA output current, and SOT-23-3 package. Circuit performance depends on tolerance and temperature range requirements rather than manufacturer.

Q: Does lower cathode current (50 µA vs. 600 µA) affect circuit operation?

A: No. Lower cathode current represents a different internal bias design but maintains electrical compatibility. Parts with 50 µA cathode current (AS431IANTR-G1, AS431IBNTR-G1) reduce circuit power consumption without affecting voltage regulation performance.

Q: Can I use a ±0.5% tolerance part (AS431ANTR-G1) in place of ±1% (TL432ACDBZRG4)?

A: Yes. Lower tolerance specifications are directly compatible and provide improved voltage regulation accuracy. No circuit modifications are required.

Q: What is the significance of the extended temperature range (-40°C to 125°C)?

A: Extended temperature range indicates the part maintains specified electrical performance across a wider operating environment. Diodes Incorporated parts with -40°C to 125°C range provide enhanced reliability in temperature-sensitive applications compared to the original 0°C to 70°C specification.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and EAR99 export classification, matching the original part's regulatory status.

Q: Which substitute offers the best accuracy?

A: AZ431AN-ATRE1 and AZ431AN-ATRG1 deliver ±0.4% tolerance, the tightest specification among available substitutes. These parts are suitable for precision voltage reference applications requiring enhanced accuracy.

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