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Microchip Technology 1N4565/TR
- Part No.:
- 1N4565/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4565/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:5,467
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Product details
Overview
1N4565/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, 200 Ω dynamic impedance, and operation from –65°C to +175°C. It delivers stable voltage reference in precision analog instrumentation requiring minimal drift over temperature.
For engineers reviewing the 1N4565/TR datasheet, 1N4565/TR pinout, 1N4565/TR application, or 1N4565/TR equivalent, key selection criteria include its 6.4 V nominal Zener voltage with ±5% tolerance, ultra-low TC option availability across the family, hermetic glass packaging, MIL-PRF-19500/452 qualification path, and TR tape-and-reel packaging format.
Technical Context
The 1N4565/TR uses internal metallurgical bonding to achieve stable Zener breakdown at 6.4 V with tightly controlled temperature coefficient of ±0.01%/°C over 0°C to +75°C. Its low 200 Ω dynamic impedance at 0.5 mA test current ensures minimal output voltage variation under load changes.
This device operates as a two-terminal passive voltage reference, requiring reverse-bias connection (cathode band positive), and is specified for ≤30 mW power dissipation during precision reference use-well below its 500 mW absolute maximum rating at 25°C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at IZT = 0.5 mA - defines nominal reference point for calibration-critical circuits |
| Temp. Coefficient (αVZ) | ±0.01%/°C over 0°C to +75°C - enables <0.7 mV/°C drift in high-stability analog references |
| Zener Impedance (ZZT) | 200 Ω at IZT = 0.5 mA - limits AC ripple rejection degradation under varying load currents |
| Max Reverse Current (IR) | 2.0 µA at 3 V - ensures negligible leakage error in high-impedance reference divider networks |
| Operating Temp Range | –65°C to +175°C - supports deployment in aerospace, downhole, and military environments |
| Package | DO-7 (DO-204AA) glass axial - hermetically sealed, MIL-qualified mechanical form factor |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass package with axial leads; cathode identified by black band. Tin-lead plated leads per MIL-STD-750 Method 2026. Weight: 0.2 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference diode cathode-connected terminal | Connected to circuit ground or lower potential node in reverse-biased configuration |
| Cathode | Reference diode anode-connected terminal | Marked with black band; connected to positive reference output node |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | ±0.01%/°C TC enables sub-millivolt drift over industrial temperature range |
| Hermetic glass construction | DO-7 package provides long-term stability and moisture resistance for mission-critical references |
| MIL-PRF-19500/452 qualification path | Add JAN/JANTX/JANTXV prefix + "-1" suffix for screened military-grade versions |
| Tape-and-reel packaging | "TR" suffix denotes EIA-296 compliant reel format for automated SMT placement compatibility |
Applications
| High-Precision ADC Reference | Aerospace Power Monitor |
|---|---|
Use Scenario: Provides stable 6.4 V reference for 16-bit SAR ADCs in data acquisition systems where gain/offset calibration must remain valid across –40°C to +85°C. IC Role / Device Role / Timing Role: Two-terminal passive voltage reference supplying excitation to ADC reference input. Use Value: ±0.01%/°C TC ensures <±0.5 mV total drift over operating range-within 1 LSB of 16-bit full-scale (≈0.0015%). |
Use Scenario: Monitors regulated bus voltage in satellite power distribution units exposed to thermal cycling from –65°C to +125°C. IC Role / Device Role / Timing Role: Primary voltage reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: Hermetic DO-7 package and –65°C to +175°C rating ensure reliability in vacuum and radiation-prone environments. |
| Military Grade Instrumentation | Downhole Oilfield Sensor |
Use Scenario: Calibrates front-end signal conditioning in portable field test equipment used for avionics maintenance. IC Role / Device Role / Timing Role: Precision reference for programmable gain amplifier offset nulling and DAC output scaling. Use Value: MIL-PRF-19500/452 qualification path (via JANTX1N4565-1) satisfies DoD sourcing requirements. |
Use Scenario: Supplies reference voltage for pressure/temperature transducer signal chains in oil well logging tools operating at 150°C+. IC Role / Device Role / Timing Role: Stable bias source for Wheatstone bridge excitation and analog front-end gain setting. Use Value: Verified operation up to +175°C ambient enables direct mounting near high-temp sensors without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4566/TR | Same DO-7 package and 6.4 V nominal, but ±0.005%/°C TC (lower drift) | Better suited for extended temperature range applications where <0.4 mV/°C drift is required | Select 1N4566/TR when tighter TC is needed without changing layout or bias current |
| 1N4570/TR | Same 6.4 V and ±0.01%/°C TC, but 100 Ω ZZT (vs. 200 Ω) at same 0.5 mA IZT | Improved AC line regulation in switching reference buffers or fast-settling DAC references | Choose 1N4570/TR when lower dynamic impedance is prioritized over cost or legacy design continuity |
Compared with 1N4565/TR, 1N4566/TR offers half the temperature coefficient for enhanced stability, while 1N4570/TR halves dynamic impedance for improved ripple rejection-both retain identical pinout, package, and bias requirements.
Availability
1N4565/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace power monitoring, and military-grade sensor interface designs requiring stable component supply and long-term obsolescence management.
Supply support for 1N4565/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 1N4565/TR belongs to Microsemi's legacy 1N45xx series of temperature-compensated Zener references, engineered specifically for precision voltage referencing in extreme-environment systems where long-term stability and MIL qualification readiness are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4565/TR?
The 1N4565/TR has a nominal Zener voltage of 6.4 V with a standard tolerance of ±5% at 0.5 mA test current. Tighter tolerances (e.g., ±1%, ±2%) are available via custom ordering with suffixes like "-1%" or "-2%", but the base 1N4565/TR adheres to the JEDEC-specified ±5% limit.
Does the 1N4565/TR require external current limiting?
Yes-the 1N4565/TR must be operated with a series current-limiting resistor to maintain its recommended test current of 0.5 mA. Without proper biasing, voltage regulation degrades due to insufficient Zener conduction or thermal runaway; typical designs use 10–20 kΩ resistors from a 12–15 V supply.
Is the 1N4565/TR qualified to military specifications?
The base 1N4565/TR is not inherently qualified, but it is the commercial version of a MIL-PRF-19500/452-compliant family. Adding the JANTX prefix and "-1" suffix (e.g., JANTX1N4565-1) yields the fully screened military-grade variant with tested reliability and environmental performance.
What is the maximum power dissipation rating for the 1N4565/TR?
The 1N4565/TR has a maximum DC power dissipation of 500 mW at 25°C lead temperature (TL). However, for optimal voltage-temperature stability, Microsemi recommends operating below 30 mW-achievable by limiting IZ to 0.5 mA and ensuring adequate heat sinking or ambient derating above 25°C.
How is polarity marked on the 1N4565/TR package?
The 1N4565/TR uses a cathode band-a single black stripe-on the glass body to identify the cathode terminal. The banded end must be held at a higher potential than the anode (unbanded) end for proper reverse-bias operation as a Zener reference diode.
1N4565/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):
- 200 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
1N4565/TR FAQ
1.How can I place an order for 1N4565/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4565/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 1N4565/TR reliable?
The price and inventory of 1N4565/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4565/TR is usually 5 days.
3.What payment methods are accepted for 1N4565/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4565/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4565/TR?
1N4565/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4565/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 1N4565/TR?
For technical support, including 1N4565/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4565/TR requirements.
6.How does Aetrix verify that 1N4565/TR is sourced from the original manufacturer or authorized distributors?
All 1N4565/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 1N4565/TR meets industry standards.
7.What is the process for return or replacement of 1N4565/TR?
All 1N4565/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4565/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 1N4565/TR part is unused and in its original packaging.
Return procedure for 1N4565/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4565/TR Tags
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