
ed Zener 
6.4 Volt Temperature Compensat
Reference Diodes 
Microsemi 
Scottsdale Division 
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503 
Page 1
Copyright 
 2003 
10-27-2003  REV B 
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M
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SCOTTSDALE DIVISION
1N4565 thru 1N4584A-1 DO-7 
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DESCRIPTION 
APPEARANCE 
The popular 1N4565 thru 1N4584A-1 series of Zero-TC Reference Diodes 
provides a selection of both 6.4 V nominal voltages and temperature 
coefficients to as low as 0.0005%/
o
C for minimal voltage change with 
temperature.  Four different operating currents are available for selection at 
0.5 mA, 1.0 mA, 2.00 mA, and 4.00 mA.  These glass axial-leaded DO-7 
reference diodes are internal-metallurgical-bonded and are also available in 
JAN, JANTX, and JANTXV military qualifications.  Microsemi also offers 
numerous other Zener Reference Diode products for a variety of other 
voltages up to 200 V.         
DO-7 
(DO-204AA)
IMPORTANT:  
For the most current data, consult 
MICROSEMI’s 
 website:  
FEATURES  
JEDEC registered 1N4565 thru 1N4584 series . 
 
Reference voltage diodes of nominal 6.4 V +/- 5% 
with tighter tolerance options available  
 
Temperature Coefficient range:  0.01%/
o
C to 
0.0005%/
C. 
 
Zener Test Current selection range:  0.500 mA, 1.00 
mA, 2.00 mA and 4.00 mA. 
 
Internal metallurgical bonded  
 
1N4565 thru 1N4584 also have qualification to MIL-
PRF-19500/452 by adding the JAN, JANTX, 
JANTXV, or JANS prefixes to part numbers a well as 
the “-1” suffix; e.g. JANTX1N4574A-1, etc. 
 
Military surface mount equivalents also available in 
DO-213AA by adding UR-1 suffix and the JAN, 
JANTX, and JANTXV prefix, e.g. 
JANTX1N4569AUR-1 (see separate data sheet) 
 
Also available in DO-35 package including military 
qualifications up to JANTXV (see separate data 
sheet) 
MAXIMUM RATINGS 
 
Operating Temperatures:  -65
o
C to +175
o
C 
 
Storage Temperatures:  -65
o
C to +175
o
C 
 
DC Power Dissipation:  500 mW @ T
L
 = 25
o
C with 
maximum current I
ZM
 70 mA.  NOTE:  For optimum 
voltage-temperature stability, the operating test 
current (I
ZT
) should be as specified in the Electrical 
Characteristics Table (power less than 30 mW)  
 
Solder Temperatures:  260
o
C for 10 s (max)  
APPLICATIONS / BENEFITS 
 
Provides minimal voltage change over a broad 
operating temperature range for instrumentation and 
other circuit designs requiring a voltage reference  
Temperature coefficient selections available from 
0.01%/oC to 0.0005%/oC  
Tight reference voltage tolerances available with 
nominal value of 6.4 V by adding tolerance 1%, 2%, 
3%, etc. after the part number for identification, e.g. 
1N4569-2%, 1N4579A-1%, 1N4574A-1-1%, etc.  
 Flexible axial-leaded mounting terminals 
 Nonsensitive to ESD per MIL-STD-750 Method 1020 
 
 
 
 
MECHANICAL AND PACKAGING 
 
CASE:  Hermetically sealed glass case.  DO-7 (DO-
204AA) package 
 
TERMINALS:  Leads, tin-lead plated solderable per 
MIL-STD-750, Method 2026 
 
MARKING:  Part number and cathode band   
 
POLARITY:  Reference diode to be operated with the 
banded end positive with respect to the opposite end 
 
TAPE & REEL option:  Standard per EIA-296 (add 
“TR” suffix to part number) 
 
WEIGHT:  0.2 grams. 
 
See package dimensions on last page