Texas Instruments LM4040C
LM4040C variants from Texas Instruments
LM4040C Overview
What changes between part numbers, and what to check before you lock the BOM — Voltage References.
Key Features
- Footprint / package: SOT-23-3, TO-226-3, TO-92-3 (TO-226AA) Formed LeadsLand pattern and thermal pad differ between these packages — run a quick footprint check before you swap variants.
- Lifecycle mix: ActiveConfirm lifecycle on the exact MPN, not just the base number prefix.
- 25 distinct suffix patternsExamples: 20IDBZTG4, 10IDBZR, 10IDCKR, 20IDBZR, 20IDBZT (+20 more). Decode suffix meaning in the ordering notes under the variant table.
Target Applications
- Voltage References — design-in and field replacement
- BOM scrub where only the base prefix is known but suffix is TBD
- Second-source checks when the original MPN is constrained
Ordering Variants
Compare 25 LM4040C part numbers by package, electrical parameters, lifecycle, and availability. Use RFQ for stock and lead-time confirmation.
| Part Number | Description | Package Type | Manufacturer | Lifecycle | RoHS | Availability | Action |
|---|---|---|---|---|---|---|---|
| LM4040C20IDBZTG4 | Package: SOT-23-3 | Output Voltage: 2.048V | Output Current: 15mA | Max Output Current: 15mA | Max Operating Temp: 125°C | Min Operating Temp: -40°C | SOT-23-3 | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C10IDBZR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C10IDCKR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 5-SC70 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C20IDBZR | 2.048V Shunt Voltage Reference, 15mA, 0.5% Tol, SOT-23 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C20IDBZT | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C20QDBZT | V-Ref Precision 2.048V 15mA Automotive 3-Pin SOT-23 T/R | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C25IDBZR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C25IDBZT | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C25IDCKR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 5-SC70 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C25IDCKT | Fixed voltage, 45-µA, precision micropower shunt voltage reference 5-SC70 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C30IDBZR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C30IDBZT | 3V Shunt Voltage Reference, 0.5% Tol, 15mA, SOT-23 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C30ILP | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-TO-92 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C30ILPR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-TO-92 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C30QDBZR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 125 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C41IDBZR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C41IDBZT | Fixed voltage, 45-µA, precision micropower shunt voltage reference 3-SOT-23 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C50IDBZR | V-Ref Precision 5V 15mA Automotive 3-Pin SOT-23 T/R | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C50IDBZT | 5V Shunt Voltage Reference, 0.5% Tol, SOT-23 | - | Texas Instruments | Active | Compliant | In Stock | |
| LM4040C50IDCKR | Fixed voltage, 45-µA, precision micropower shunt voltage reference 5-SC70 -40 to 85 | - | Texas Instruments | Active | Compliant | In Stock |
Ordering Code Differences
How suffixes on LM4040C map to package, grade, and reel options.
How to Choose the Right LM4040C Voltage References
Match the footprint first
Packages here: SOT-23-3, TO-226-3, TO-92-3 (TO-226AA) Formed Leads. Open the land-pattern drawing before you substitute a different suffix.
Electrical headroom
Compare voltage and current columns in the variant table. For LM4040C, a suffix with lower voltage or current rating will not survive the same circuit without recalculation.
Temp grade letter matters
Commercial (0–70 °C) and industrial (−40–85 °C+) suffixes look similar in the prefix — confirm ambient + self-heating, not just the first page of the datasheet.
Copy the full MPN
Do not BOM only "LM4040C" — include the full suffix (e.g. 20IDBZTG4, 10IDBZR, 10IDCKR). RFQ with reel/tube preference and required date code.
Technical Specifications
Core parameters for LM4040C product family
Identity
Base Model
LM4040C
Manufacturer
Texas Instruments
Listed Variants
25
Variant Parameters
Package Type
SOT-23-3, TO-226-3, TO-92-3 (TO-226AA) Formed Leads
Lifecycle Status
Active
RoHS Status
Compliant
Source LM4040C with Octatronics
Request stock confirmation, lead time, date code, and pricing for all 25 ordering variants from Texas Instruments. Our team supports active, EOL, and hard-to-find component sourcing.
- Original manufacturer parts with traceability options
- BOM upload and multi-line RFQ support
- Package, grade, and compliance verification
Frequently Asked Questions
Common technical questions about the LM4040C product family.
LM4040C is a base / family code from Texas Instruments. You order a full MPN such as LM4040C20IDBZTG4, LM4040C10IDBZR, LM4040C10IDCKR. The variant table lists 25 orderable lines with different suffixes.
Listed suffix fragments include: 20IDBZTG4, 10IDBZR, 10IDCKR, 20IDBZR, 20IDBZT, 20QDBZT. Typically they encode package (SOT-23-3, TO-226-3, TO-92-3 (TO-226AA) Formed Leads), temperature grade, and tape/reel option. Always decode on the Texas Instruments datasheet ordering guide — do not guess from pattern alone.
On this page the varying fields are: Package Type. Filter the table by the parameter you care about before picking an MPN.
Only after footprint and thermal review. Packages listed here (SOT-23-3, TO-226-3, TO-92-3 (TO-226AA) Formed Leads) use different land patterns and often different thermal resistance. Layout swaps need a new paste stencil at minimum, not just a BOM edit.
Lifecycle values in our listing: Active. Status is per MPN suffix — one variant can be Active while another is NRND. Check PCN for your exact suffix before multi-year commitments.
Full manufacturer MPN (not just LM4040C), quantity, needed date code, reel vs tube, and any compliance docs (CoC, RoHS, conflict minerals). If you only know the base prefix, include a photo of the existing label or reel.
Use the datasheet link in the page header. Cross-check electrical curves (SOA, saturation voltage, etc.) against your operating point — the table summarizes order codes, not every graph in the PDF.