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Microchip Technology 1N4574A/TR
- Part No.:
- 1N4574A/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N4574A/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO204AH
- Quantity:
- Payment:
- Shipping:
Inventory:6,219
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Product details
Overview
1N4574A/TR from Microsemi is a temperature-compensated 6.4 V Zener reference diode in DO-7 (DO-204AA) glass axial package, rated for 1.0 mA test current, 0.0005 %/°C temperature coefficient, 100 Ω dynamic impedance, and operation from –65 °C to +175 °C. It delivers high-stability voltage reference in precision instrumentation and military-grade analog circuits.
For engineers reviewing the 1N4574A/TR datasheet, 1N4574A/TR pinout, 1N4574A/TR application, or 1N4574A/TR equivalent, key selection criteria include its ultra-low TC (0.0005 %/°C), tight 6.4 V ±5% nominal tolerance, hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness, and TR tape-and-reel availability.
Technical Context
This device belongs to Microsemi's 1N4565–1N4584A-1 series of zero-temperature-coefficient Zener references. Its 6.4 V nominal output is achieved via internal metallurgical bonding of complementary Zener and forward-biased junctions, enabling cancellation of intrinsic TC over –55 °C to +100 °C.
It operates at IZT = 1.0 mA with ≤30 mW dissipation for optimal stability, exhibits ≤2 µA reverse leakage at 3 V, and maintains <100 Ω dynamic impedance under specified test conditions - critical for low-noise, low-drift reference designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.4 V ±5% at IZT = 1.0 mA - defines primary reference accuracy under standard bias |
| Temperature Coefficient | 0.0005 %/°C - enables minimal drift (<0.32 mV/°C) across –55 °C to +100 °C operating range |
| Zener Test Current | 1.0 mA - required bias for specified VZ and TC performance; power <30 mW |
| Dynamic Impedance | 100 Ω at IZT = 1.0 mA - determines AC regulation sensitivity and noise rejection capability |
| Max Reverse Current | 2.0 µA at 3 V - ensures low leakage in high-impedance reference node applications |
| Operating Temperature | –65 °C to +175 °C - supports extended-range industrial, aerospace, and downhole electronics |
| Package | DO-7 (DO-204AA) glass axial - hermetically sealed, MIL-qualified, lead-tin plated per MIL-STD-750 |
Pinout & Package
DO-7 (DO-204AA) glass axial package with two leads: cathode marked by band, anode unmarked. Hermetically sealed, tin-lead plated, weight 0.2 g. Solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reference output terminal | Connected to positive supply rail; voltage referenced to anode; polarity must be observed for stable regulation |
| Anode (unbanded end) | Reference ground/reference return | Serves as circuit common; reverse-biased configuration requires anode at lower potential than cathode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low temperature coefficient | 0.0005 %/°C - achieves <±1.5 mV total drift over –55 °C to +100 °C, critical for metrology-grade references |
| Hermetic DO-7 construction | Glass-sealed axial package - ensures long-term parameter stability and immunity to humidity-induced degradation |
| MIL-PRF-19500/452 qualification path | JANTXV prefix + "-1" suffix option (e.g., JANTXV1N4574A-1) - enables use in defense/aerospace programs requiring screening and traceability |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling and assembly |
| Tape-and-reel packaging | "TR" suffix indicates EIA-296 compliant reel - supports automated SMT placement despite axial form factor |
Applications
| High-Accuracy Data Acquisition | Military Power Supply Reference |
|---|---|
|
Use Scenario: Precision ADC/DAC reference in portable test equipment requiring <10 ppm/°C drift. IC Role / Device Role / Timing Role: Primary voltage reference source for analog front-end signal conditioning and conversion stages. Use Value: 0.0005 %/°C TC and 100 Ω ZZT ensure <±0.5 LSB error contribution over full temperature range. |
Use Scenario: Voltage setpoint in radiation-tolerant DC-DC converters for satellite subsystems. IC Role / Device Role / Timing Role: Stable reference for error amplifier feedback loop in regulated power modules. Use Value: –65 °C to +175 °C rating and MIL-PRF-19500 qualification path support mission-critical reliability requirements. |
| Industrial Sensor Signal Conditioning | Calibration Equipment Reference |
|
Use Scenario: Bridge excitation and offset compensation in strain-gauge transmitters deployed in oilfield environments. IC Role / Device Role / Timing Role: Low-drift excitation reference and zero-point calibration anchor. Use Value: Hermetic DO-7 package prevents parameter shift due to thermal cycling and moisture ingress over 15+ year service life. |
Use Scenario: Primary reference in handheld multimeters and benchtop calibrators requiring NIST-traceable stability. IC Role / Device Role / Timing Role: Master reference against which all internal scaling and gain stages are adjusted. Use Value: 6.4 V nominal value enables direct compatibility with legacy 5 V and 10 V reference ladder architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4574/TR | Same 6.4 V nominal, 1.0 mA IZT, but 0.001 %/°C TC (2× higher drift) and 100 Ω ZZT; no "A" grade tolerance enhancement | Acceptable where ±3 mV/°C drift is tolerable; not suitable for Class A metrology or space-grade designs | Select 1N4574/TR only when cost sensitivity outweighs ultra-low TC requirement |
| LM399H | 2.5 V buried-Zener IC with oven-controlled TC (0.05 ppm/°C), 6 V supply, TO-99 metal can; requires external heater control | Used in lab-grade standards and frequency synthesizers where sub-ppm stability justifies complexity and power overhead | Choose LM399H only when 1N4574A/TR's 0.0005 %/°C is insufficient and active temperature stabilization is feasible |
Compared with 1N4574/TR and LM399H, the 1N4574A/TR uniquely balances ultra-low TC, hermetic reliability, and simplicity - delivering 0.0005 %/°C drift without external circuitry or power overhead, making it optimal for embedded high-reliability analog systems.
Availability
1N4574A/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace power management, and industrial sensor conditioning requiring stable component supply and long-lifecycle support.
Supply support for 1N4574A/TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and radiation-hardened components for defense, aerospace, and industrial markets.
The 1N4574A/TR belongs to Microsemi's Scottsdale Division legacy Zener reference family, engineered specifically for applications demanding extreme temperature stability and hermetic integrity in harsh environments.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4574A/TR?
The 1N4574A/TR has a nominal Zener voltage of 6.4 V with a standard tolerance of ±5% at 1.0 mA test current. Tighter tolerances (e.g., ±1%, ±2%) are available via suffixes like "-1%" added to the part number, per Microsemi's ordering guidance.
Does the 1N4574A/TR require external temperature compensation?
No - the 1N4574A/TR integrates temperature-compensated Zener architecture with a 0.0005 %/°C coefficient, eliminating need for external thermistors or compensation networks. Its design inherently cancels TC over –55 °C to +100 °C without auxiliary circuitry.
What does the "TR" suffix indicate for the 1N4574A/TR?
The "TR" suffix on 1N4574A/TR denotes EIA-296 compliant tape-and-reel packaging, enabling automated pick-and-place assembly. This format is standardized for axial-leaded DO-7 devices and includes orientation control and moisture barrier sealing per industry requirements.
Can the 1N4574A/TR be used in military applications?
Yes - the 1N4574A/TR is designed for MIL-PRF-19500/452 qualification. By adding the JANTXV prefix and "-1" suffix (e.g., JANTXV1N4574A-1), it becomes a fully screened, tested, and documented military-grade device meeting DSCC requirements.
What is the maximum power dissipation rating for the 1N4574A/TR?
The 1N4574A/TR is rated for 500 mW DC power dissipation at 25 °C lead temperature (TL). However, for optimal voltage-temperature stability, Microsemi specifies operation below 30 mW - achieved by biasing at its 1.0 mA test current with ≤30 V across the device.
1N4574A/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.4 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 3 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AH (DO-35)
1N4574A/TR FAQ
1.How can I place an order for 1N4574A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4574A/TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N4574A/TR reliable?
The price and inventory of 1N4574A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4574A/TR is usually 5 days.
3.What payment methods are accepted for 1N4574A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4574A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4574A/TR?
1N4574A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4574A/TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N4574A/TR?
For technical support, including 1N4574A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4574A/TR requirements.
6.How does Aetrix verify that 1N4574A/TR is sourced from the original manufacturer or authorized distributors?
All 1N4574A/TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4574A/TR meets industry standards.
7.What is the process for return or replacement of 1N4574A/TR?
All 1N4574A/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4574A/TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N4574A/TR part is unused and in its original packaging.
Return procedure for 1N4574A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4574A/TR Tags
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MMBZ5240B-7-F
Diodes Incorporated
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