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Microchip Technology 1N4570/TR
- Part No.:
- 1N4570/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4570/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:2,731
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Product details
Overview
1N4570/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 0.5 mA test current, 0.01 %/°C temperature coefficient, and 100 Ω dynamic impedance at IZT. It delivers stable voltage reference performance across -65°C to +175°C for precision analog instrumentation.
For engineers reviewing the 1N4570/TR datasheet, 1N4570/TR pinout, 1N4570/TR application, or 1N4570/TR equivalent, key selection criteria include its low TC (0.01 %/°C), hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness, and tight 6.4 V ±5% nominal tolerance under 0.5 mA bias.
Technical Context
This device belongs to Microsemi's zero-TC Zener series optimized for minimal voltage drift over temperature. Its 6.4 V nominal Zener voltage leverages silicon junction characteristics near the temperature-invariant point of ~6.2–6.4 V, enabling intrinsic compensation without external circuitry.
The 0.5 mA Zener test current and 100 Ω dynamic impedance reflect design optimization for low-power, high-stability reference use. Operating within 30 mW dissipation ensures thermal stability while maintaining voltage accuracy across military-grade temperature extremes (-65°C to +175°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.4 V ±5% at IZT = 0.5 mA - defines primary reference accuracy under standard test condition |
| Temperature Coefficient | 0.01 %/°C - enables <0.7 mV/°C drift over 0 to +75°C operating range |
| Zener Impedance | 100 Ω at IZT = 0.5 mA - limits AC error contribution in buffered reference circuits |
| Max Power Dissipation | 500 mW @ TL = 25°C - supports short-term surge handling; recommended ≤30 mW for optimal TC stability |
| Operating Temperature | -65°C to +175°C - qualified for aerospace, downhole, and extended industrial environments |
| Package | DO-7 (DO-204AA) - hermetically sealed glass axial package with tin-lead solderable leads |
| Reverse Current | ≤2.0 µA at 3 V - ensures negligible leakage error in high-impedance reference nodes |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass package with axial leads. Cathode identified by black band; anode is unbanded lead. Leads are tin-lead plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference diode cathode-connected node | Connected to circuit ground or lower potential; reverse-biased operation requires cathode > anode |
| Cathode | Zener voltage output terminal | Provides stable 6.4 V reference when biased with 0.5 mA through external resistor; marked with black band |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener voltage | 6.4 V with 0.01 %/°C TC enables <±1.5 mV total drift over 0 to +75°C |
| Hermetic DO-7 glass package | Ensures long-term parameter stability and moisture resistance in harsh environments |
| MIL-PRF-19500/452 qualification path | Supports JAN/JANTX/JANTXV versions with "-1" suffix for defense/aerospace programs |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for on-board ESD protection |
| Tape-and-reel option | "TR" suffix denotes EIA-296 compliant packaging for automated SMT placement compatibility |
Applications
| High-Precision Instrumentation | Aerospace Avionics Reference |
|---|---|
Use Scenario: Analog front-end calibration in portable multimeters and data acquisition systems requiring sub-10 ppm/°C reference stability. IC Role / Device Role / Timing Role: Primary voltage reference for ADC/DAC biasing and offset trimming circuits. Use Value: 0.01 %/°C TC and hermetic DO-7 construction maintain accuracy over wide ambient swings without recalibration. |
Use Scenario: Power supply monitoring and sensor signal conditioning in flight control computers operating from -55°C to +100°C. IC Role / Device Role / Timing Role: Stable 6.4 V reference for voltage supervisors and analog comparators in radiation-tolerant designs. Use Value: -65°C to +175°C rating and MIL-PRF-19500 qualification path support full lifecycle deployment in certified avionics hardware. |
| Downhole Oil & Gas Sensors | Industrial Process Controllers |
Use Scenario: Pressure and temperature transducer excitation in borehole tools exposed to >150°C ambient and high-vibration conditions. IC Role / Device Role / Timing Role: Precision excitation source for Wheatstone bridge sensors requiring low-drift bias. Use Value: Hermetic glass package prevents parameter shift due to hydrogen diffusion or thermal cycling fatigue. |
Use Scenario: Programmable logic controller (PLC) analog I/O modules needing repeatable 4–20 mA loop calibration across factory floor temperatures. IC Role / Device Role / Timing Role: Reference element in voltage-to-current conversion and DAC output scaling networks. Use Value: 100 Ω Zener impedance minimizes interaction with op-amp feedback networks, preserving linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4570A/TR | Same 6.4 V / 0.01 %/°C / 0.5 mA spec but tighter initial tolerance (±2% vs ±5%) and enhanced screening per JANTX-level requirements | Required where tighter initial accuracy or extended reliability testing is mandated (e.g., space-grade subsystems) | Select 1N4570A/TR when ±2% VZ tolerance and MIL-PRF-19500 compliance are contractually required |
| LM399H | 2 ppm/°C TC, 6.95 V output, buried-Zener architecture, TO-99 metal can, 10 mA operating current | Used in metrology-grade instruments demanding <0.1 ppm/°C stability; not drop-in due to different package, bias, and voltage | Choose LM399H only for ultra-high-precision lab equipment; 1N4570/TR remains optimal for ruggedized field-deployable systems |
Compared with 1N4570A/TR, the 1N4570/TR offers cost-effective baseline stability for industrial use; versus LM399H, it trades ultimate TC performance for hermetic DO-7 robustness, wider temperature range, and simpler biasing at 0.5 mA.
Availability
1N4570/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace avionics, and downhole oil & gas sensing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for 1N4570/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4570/TR belongs to Microsemi's legacy 1N45xx temperature-compensated Zener reference diode family, engineered specifically for applications demanding stable voltage references under extreme thermal and environmental stress.
FAQ
What is the Zener test current for 1N4570/TR?
The 1N4570/TR is specified at a Zener test current (IZT) of 0.5 mA. This current level is used to measure its nominal 6.4 V Zener voltage and 0.01 %/°C temperature coefficient. Operating at this bias ensures optimal TC performance and aligns with JEDEC registration requirements for the 1N4570/TR series.
Is 1N4570/TR suitable for military applications?
Yes, the 1N4570/TR serves as the commercial baseline for MIL-PRF-19500/452 qualified variants. By adding prefixes such as JANTX or JANTXV and the "-1" suffix (e.g., JANTX1N4570-1), the same die and DO-7 package meet military screening and reliability standards. The base 1N4570/TR itself is fully compatible with those qualification paths.
What does the "TR" suffix mean in 1N4570/TR?
The "TR" suffix in 1N4570/TR indicates tape-and-reel packaging per EIA-296 standards. This format supports automated pick-and-place assembly in high-volume manufacturing. The electrical and mechanical specifications of the 1N4570/TR remain identical to the bulk version - only the packaging differs.
How does the temperature coefficient of 1N4570/TR compare to standard Zeners?
The 1N4570/TR achieves a temperature coefficient of 0.01 %/°C - over 10× better than typical 5.6 V Zeners (~0.1 %/°C) and 100× better than non-compensated 12 V Zeners (~1 %/°C). This low TC results from junction engineering near the 6.4 V silicon zero-TC point, making the 1N4570/TR ideal for applications where thermal drift must be minimized.
Can 1N4570/TR replace 1N4565/TR in an existing design?
No - although both are 6.4 V DO-7 Zeners, the 1N4565/TR has a higher 0.01 %/°C TC but significantly higher 200 Ω dynamic impedance versus the 1N4570/TR's 100 Ω. Substituting them may increase AC noise coupling and reduce regulation accuracy under varying load conditions. Always verify impedance and TC match in the target operating current before replacement.
1N4570/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, 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-7
1N4570/TR FAQ
1.How can I place an order for 1N4570/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4570/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 1N4570/TR reliable?
The price and inventory of 1N4570/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4570/TR is usually 5 days.
3.What payment methods are accepted for 1N4570/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4570/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4570/TR?
1N4570/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4570/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 1N4570/TR?
For technical support, including 1N4570/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4570/TR requirements.
6.How does Aetrix verify that 1N4570/TR is sourced from the original manufacturer or authorized distributors?
All 1N4570/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 1N4570/TR meets industry standards.
7.What is the process for return or replacement of 1N4570/TR?
All 1N4570/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4570/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 1N4570/TR part is unused and in its original packaging.
Return procedure for 1N4570/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4570/TR Tags
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