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Microchip Technology 1N4575/TR
- Part No.:
- 1N4575/TR
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4575/TR.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
1N4575/TR from Microsemi is a 6.4 V temperature-compensated Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for 2.0 mA test current, ±0.01%/°C temperature coefficient, 50 Ω dynamic impedance, and operating across –65°C to +175°C. It delivers stable voltage reference in precision instrumentation and aerospace power supply feedback loops.
For engineers reviewing the 1N4575/TR datasheet, 1N4575/TR pinout, 1N4575/TR application, or 1N4575/TR equivalent, key selection criteria include its 2.0 mA Zener test current, low 0.01%/°C TC, hermetic DO-7 packaging, MIL-PRF-19500/452 qualification eligibility, and TR tape-and-reel availability.
Technical Context
This device belongs to Microsemi's zero-temperature-coefficient Zener family optimized for minimal voltage drift over temperature. Its 6.4 V nominal Zener voltage is achieved via internal metallurgical bonding and dual-junction compensation architecture.
The 1N4575/TR operates at 2.0 mA IZT, yielding 50 Ω dynamic impedance and <2.0 µA reverse leakage at 3 V. Its TC of ±0.01%/°C applies over 0°C to +75°C, with full operational range extending to –65°C to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.4 V ±5% at 2.0 mA - provides tight baseline reference for calibration-critical circuits |
| Temperature Coefficient | ±0.01%/°C over 0°C to +75°C - ensures <0.64 mV/°C drift in mid-range thermal environments |
| Zener Test Current (IZT) | 2.0 mA - defines optimal bias point for specified VZ and impedance performance |
| Dynamic Impedance (ZZT) | 50 Ω at IZT - limits AC ripple coupling into reference node under dynamic load |
| Max Reverse Current (IR) | 2.0 µA at 3 V - guarantees high DC blocking integrity below breakdown threshold |
| Operating Temperature | –65°C to +175°C - supports deployment in extended-environment military and downhole systems |
| Power Dissipation | 500 mW @ TL = 25°C - enables use in low-power analog rails without forced cooling |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass axial-leaded package with cathode band marking; leads are tin-lead plated per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference diode cathode-connected terminal | Connected to circuit ground or lower-potential node when used in reverse-biased configuration |
| Cathode | Zener breakdown terminal | Banded end; connected to positive supply rail to establish 6.4 V reference potential relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Temperature-compensated Zener structure | Internal dual-junction design achieves ±0.01%/°C TC over 0°C to +75°C, minimizing calibration drift |
| Hermetic DO-7 glass package | Enables operation from –65°C to +175°C with long-term stability in harsh environments |
| MIL-PRF-19500/452 qualification path | Supports JAN/JANTX/JANTXV versions with "-1" suffix for defense-grade reliability and screening |
| Tape-and-reel packaging (TR) | EIA-296 compliant format enables automated SMT placement despite axial-leaded form factor |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special handling during assembly |
Applications
| High-Precision ADC Reference | Aerospace Power Supply Feedback |
|---|---|
Use Scenario: Provides stable reference voltage for 16-bit+ analog-to-digital converters in flight control sensor interfaces. IC Role / Device Role / Timing Role: Voltage reference source establishing exact 6.4 V full-scale input range for SAR ADCs. Use Value: ±0.01%/°C TC ensures <±0.5 LSB error contribution over 0°C to +75°C ambient range. |
Use Scenario: Sets regulated output voltage in radiation-tolerant DC-DC converters aboard satellites. IC Role / Device Role / Timing Role: Precision shunt reference in optocoupler-isolated feedback loop of isolated flyback regulator. Use Value: Hermetic DO-7 package and –65°C to +175°C rating support operation in vacuum and thermal cycling environments. |
| Calibration Equipment Reference | Downhole Oilfield Instrumentation |
Use Scenario: Serves as primary voltage standard in handheld multimeter calibration modules. IC Role / Device Role / Timing Role: Primary reference element in four-terminal Kelvin-connected reference divider network. Use Value: 2.0 mA IZT and 50 Ω ZZT enable low-noise, low-drift operation with minimal self-heating effect. |
Use Scenario: Stabilizes bias voltage for pressure transducer signal conditioning in deep-well drilling tools. IC Role / Device Role / Timing Role: Shunt reference maintaining excitation voltage accuracy under extreme thermal gradients. Use Value: Operational capability to +175°C allows direct mounting near high-temperature sensor elements 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 |
|---|---|---|---|
| 1N4575A/TR | Same 6.4 V nominal, 2.0 mA IZT, but tighter ±1% VZ tolerance (vs. ±5% for 1N4575/TR) | Preferred where absolute initial accuracy > stability over temperature | Select 1N4575A/TR when system-level calibration budget requires <±64 mV initial error |
| LM399H | 2 ppm/°C TC, 6.95 V output, buried-Zener topology, TO-99 metal can, 10 mA operating current | Used in metrology-grade instruments requiring sub-ppm stability; not drop-in compatible | Choose LM399H only when ultra-low TC and long-term drift (<5 ppm/year) outweigh cost and layout constraints |
Compared with 1N4575/TR, the 1N4575A/TR offers improved initial tolerance without changing TC or package, while the LM399H delivers orders-of-magnitude better TC at the expense of higher power, larger footprint, and non-axial form factor.
Availability
1N4575/TR is available at Aetrix Electronics and suitable for high-reliability instrumentation, aerospace power management, and downhole sensing applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N4575/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, radiation-hardened, and precision analog components for defense, aerospace, and industrial markets.
The 1N4575/TR belongs to Microsemi's legacy 1N45xx series of temperature-compensated Zener references, engineered specifically for applications demanding minimal voltage drift over wide thermal excursions and long-term stability in mission-critical systems.
FAQ
What is the Zener test current for 1N4575/TR?
The 1N4575/TR is specified at a Zener test current (IZT) of 2.0 mA. This current defines the operating point at which the nominal 6.4 V Zener voltage and 50 Ω dynamic impedance are guaranteed. Operating significantly above or below this current increases voltage uncertainty and impedance deviation, so biasing circuits should target 2.0 mA for datasheet-compliant performance of the 1N4575/TR.
Does 1N4575/TR have military qualification options?
Yes - the base 1N4575/TR is eligible for MIL-PRF-19500/452 qualification by adding prefixes (JAN, JANTX, JANTXV) and the "-1" suffix, e.g., JANTX1N4575-1. These variants undergo additional screening for temperature cycling, burn-in, and parameter verification per military standards. The 1N4575/TR itself is commercial-grade but shares identical die and DO-7 construction with qualified versions.
What does the "TR" suffix indicate on 1N4575/TR?
The "TR" suffix on 1N4575/TR denotes EIA-296 compliant tape-and-reel packaging. Though the DO-7 package is axial-leaded, this format enables automated pick-and-place handling in high-mix manufacturing lines. The 1N4575/TR reel contains standard quantities and meets moisture sensitivity level (MSL) requirements for immediate surface-mount integration without baking.
How does the temperature coefficient of 1N4575/TR compare to standard Zeners?
The 1N4575/TR features a ±0.01%/°C temperature coefficient - over 10× tighter than typical 5.6 V Zeners (~0.1%/°C) and 100× tighter than basic 3.3 V Zeners (~1.0%/°C). This is achieved via compensated dual-junction design, making the 1N4575/TR suitable for applications where reference drift must remain below ±0.64 mV/°C across its specified 0°C to +75°C range.
Can 1N4575/TR be used in place of 1N4574/TR?
No - the 1N4575/TR and 1N4574/TR differ in Zener test current and temperature coefficient: 1N4575/TR uses 2.0 mA IZT and ±0.01%/°C TC, whereas 1N4574/TR uses 1.0 mA IZT and ±0.0005%/°C TC. Substituting them alters bias point, impedance, and thermal drift behavior. Circuit redesign is required to maintain performance, so the 1N4575/TR must be selected intentionally for its specific 2.0 mA/±0.01%/°C operating profile.
1N4575/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):
- 50 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
1N4575/TR FAQ
1.How can I place an order for 1N4575/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4575/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 1N4575/TR reliable?
The price and inventory of 1N4575/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4575/TR is usually 5 days.
3.What payment methods are accepted for 1N4575/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4575/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4575/TR?
1N4575/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4575/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 1N4575/TR?
For technical support, including 1N4575/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4575/TR requirements.
6.How does Aetrix verify that 1N4575/TR is sourced from the original manufacturer or authorized distributors?
All 1N4575/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 1N4575/TR meets industry standards.
7.What is the process for return or replacement of 1N4575/TR?
All 1N4575/TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4575/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 1N4575/TR part is unused and in its original packaging.
Return procedure for 1N4575/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4575/TR Tags
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