My Inquiry
My Account
Microchip Technology 1N4565
- Part No.:
- 1N4565
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AA, DO-7, Axial
- Datasheet:
-
1N4565.pdf
- Description:
- DIODE ZENER 6.4V 500MW DO7
- Quantity:
- Payment:
- Shipping:
Inventory:9,473
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N4565 from Microsemi is a JEDEC-registered, temperature-compensated 6.4 V Zener reference diode in DO-7 (DO-204AA) glass axial-leaded package, rated for ±5% nominal voltage tolerance, 0.5 mA Zener test current, and 0.01%/°C temperature coefficient over 0 to +75°C. It delivers stable voltage reference performance in high-reliability analog instrumentation and precision power supply feedback loops.
For engineers reviewing the 1N4565 datasheet, 1N4565 pinout, 1N4565 application, or 1N4565 equivalent, key selection criteria include its low TC (0.01%/°C), hermetic DO-7 packaging, MIL-PRF-19500/452 qualification readiness via prefix/suffix options, and operation at 0.5 mA test current with 200 Ω dynamic impedance.
Technical Context
The 1N4565 implements a dual-junction, temperature-compensated Zener structure optimized for minimal voltage drift across temperature-achieving ±0.01%/°C TC over 0 to +75°C and ±0.0005%/°C in higher-grade variants. Its internal metallurgical bond ensures long-term stability under thermal cycling and high-temperature storage up to +175°C.
Designed for low-power reference use, it operates at 0.5 mA IZT, dissipating ≤30 mW under typical test conditions, with reverse leakage limited to 2.0 µA at 3 V and dynamic impedance specified at 200 Ω. Polarity requires cathode band to be biased positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.4 V ±5% - defines primary reference point for analog calibration and feedback circuits |
| Zener Test Current (IZT) | 0.5 mA - operating point where VZ and TC are guaranteed per JEDEC spec |
| Temperature Coefficient (αVZ) | 0.01%/°C - enables <1.5 mV total drift over 0 to +75°C ambient range |
| Dynamic Impedance (ZZT) | 200 Ω @ IZT - limits AC ripple rejection capability in low-noise references |
| Max Reverse Current (IR) | 2.0 µA @ 3 V - ensures negligible loading error in high-impedance bias networks |
| Package | DO-7 (DO-204AA) - hermetically sealed glass axial-leaded package rated for -65°C to +175°C operation |
| Power Dissipation | 500 mW @ TL = 25°C - derates linearly above 25°C; 30 mW max recommended for optimal TC stability |
Pinout & Package
DO-7 (DO-204AA) hermetically sealed glass axial-leaded package with tin-lead plated leads per MIL-STD-750 Method 2026; cathode identified by black band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode > anode |
| Cathode | Reference output node | Banded end; supplies stable 6.4 V when reverse-biased at 0.5 mA |
Key Features
| Feature | Design Value |
|---|---|
| Temperature compensation | 0.01%/°C TC over 0 to +75°C - minimizes calibration drift in field-deployed instruments |
| Hermetic DO-7 packaging | Sealed glass construction - ensures reliability in harsh environments including aerospace and military systems |
| MIL-PRF-19500/452 readiness | Qualifiable as JAN/JANTX/JANTXV with "-1" suffix - supports defense and space-grade procurement paths |
| Low reverse leakage | 2.0 µA @ 3 V - preserves accuracy in high-Z divider networks and battery-powered references |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - eliminates need for external ESD protection in handling |
Applications
| High-Precision Instrumentation | Aerospace Power Monitoring |
|---|---|
|
Use Scenario: Calibration of 16-bit ADC reference inputs in portable multimeters and data loggers. IC Role / Device Role / Timing Role: Primary voltage reference source establishing absolute measurement scale. Use Value: 0.01%/°C TC ensures <±0.75 mV drift over operating range, meeting Class A metrology requirements. |
Use Scenario: Feedback sensing in radiation-tolerant DC-DC converters on satellite bus regulators. IC Role / Device Role / Timing Role: Stable reference for error amplifier in isolated flyback control loop. Use Value: Hermetic DO-7 package and -65°C to +175°C rating support extended mission life in orbital thermal cycles. |
| Military Analog Signal Conditioning | Industrial Process Controller Reference |
|
Use Scenario: Biasing of op-amp input stages in ruggedized signal conditioning modules for battlefield sensors. IC Role / Device Role / Timing Role: Low-drift reference for offset nulling and gain-setting networks. Use Value: 0.5 mA IZT enables direct drive from low-current bias sources without active buffering. |
Use Scenario: Setpoint generation in PLC analog I/O modules requiring long-term stability over 10+ year deployments. IC Role / Device Role / Timing Role: Primary reference for DAC output scaling and sensor excitation circuits. Use Value: Internal metallurgical bond and 500 mW power rating ensure drift <10 ppm/year under continuous operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4566 | Same DO-7 package and 6.4 V nominal voltage, but 0.005%/°C TC (vs. 0.01%/°C for 1N4565) | Lower TC suits ultra-stable lab-grade references; requires tighter thermal management due to narrower temp range (–55°C to +100°C) | Select 1N4566 when sub-0.5 mV total drift over full industrial range is required and board-level thermal gradients can be controlled. |
| 1N4570 | Same 0.01%/°C TC and 0.5 mA IZT, but 100 Ω ZZT (vs. 200 Ω for 1N4565) and extended temp range (–55°C to +100°C) | Better AC rejection in switching regulator feedback; validated for wider ambient extremes in avionics enclosures | Choose 1N4570 for designs needing improved dynamic impedance without changing layout or bias network. |
Compared with 1N4566 and 1N4570, the 1N4565 offers the highest TC among the 0.5 mA group while maintaining lowest cost and broadest legacy qualification path-making it optimal for cost-sensitive, high-volume industrial instrumentation where moderate TC is acceptable.
Availability
1N4565 is available at Aetrix Electronics and suitable for high-reliability analog instrumentation, aerospace power monitoring, and military signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 1N4565 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 belongs to Microsemi's Scottsdale Division legacy Zener reference diode family, engineered specifically for precision voltage referencing in mission-critical systems where long-term stability and environmental resilience are mandatory.
FAQ
What is the Zener test current for the 1N4565?
The 1N4565 is specified at a Zener test current (IZT) of 0.5 mA. This current level is used to measure and guarantee its nominal 6.4 V Zener voltage and 0.01%/°C temperature coefficient. Operating the 1N4565 significantly above or below this current may shift VZ and degrade TC performance, so bias networks should be designed to maintain ~0.5 mA under all operating conditions.
Is the 1N4565 available in military-grade versions?
Yes-the 1N4565 can be qualified to MIL-PRF-19500/452 as JAN, JANTX, or JANTXV by adding the appropriate prefix and the "-1" suffix (e.g., JANTX1N4565-1). These versions undergo additional screening for temperature cycling, hermeticity, and long-term reliability, making them suitable for defense and space applications where standard commercial parts are insufficient.
What is the maximum operating temperature for the 1N4565?
The 1N4565 is rated for continuous operation from –65°C to +175°C. Its hermetic DO-7 glass package and internal metallurgical bonding enable reliable performance across this full range. However, for optimal temperature coefficient stability, the datasheet recommends limiting power dissipation to ≤30 mW-requiring thermal design consideration at elevated ambient temperatures.
How does the 1N4565 differ from the 1N4565A variant?
The 1N4565A shares identical electrical specifications-including 6.4 V nominal voltage, 0.5 mA IZT, and 0.01%/°C TC-but is characterized over a wider temperature range (–55°C to +100°C vs. 0 to +75°C for the base 1N4565). Both use the same DO-7 package and marking scheme; the "A" suffix denotes extended characterization, not a physical or functional change in the 1N4565 device itself.
Can the 1N4565 be used in surface-mount designs?
No-the 1N4565 is exclusively offered in the axial-leaded DO-7 (DO-204AA) through-hole package. For surface-mount equivalents, Microsemi provides military-qualified DO-213AA variants (e.g., JANTX1N4569AUR-1), but these are distinct part numbers-not drop-in replacements for the 1N4565. Board redesign and requalification would be required to migrate to SMT.
1N4565 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AA, DO-7, Axial
- Packaging:
- Bulk
- 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 FAQ
1.How can I place an order for 1N4565 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4565 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 reliable?
The price and inventory of 1N4565 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4565 is usually 5 days.
3.What payment methods are accepted for 1N4565?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4565 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4565?
1N4565 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4565 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?
For technical support, including 1N4565 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4565 requirements.
6.How does Aetrix verify that 1N4565 is sourced from the original manufacturer or authorized distributors?
All 1N4565 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 meets industry standards.
7.What is the process for return or replacement of 1N4565?
All 1N4565 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4565, 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 part is unused and in its original packaging.
Return procedure for 1N4565:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4565 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
