• 1N821UR-1, 1N823UR-1, 1N825UR-1, 1N827UR-1 AND 1N829UR-1 AVAILABLE
IN
JAN, JANTX, JANTXV AND JANS
PER MIL-PRF-19500/159
• TEMPERATURE COMPENSATED ZENER DIODES
• LEADLESS PACKAGE FOR SURFACE MOUNT
• 6.2 AND 6.55 VOLT NOMINAL ZENER VOLTAGES
• METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION
1N821UR-1 thru 1N829UR-1
and
CDLL821 thru CDLL829A
MAXIMUM RATINGS
Operating Temperature: -65°C to +175°C
Storage Temperature: -65°C to +175°C
DC Power Dissipation: 500mW @ +50°C
Power Derating: 4 mW / °C above +50°C
REVERSE LEAKAGE CURRENT
l
R
= 2
µ
A @ 25°C & V
R
= 3 Vdc
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
DIM
D
F
G
G1
S
CDI
TYPE
NUMBER
ZENER
VOLTAGE
V @I
Z
ZT
ZENER
TEST
CURRENT
I
ZT
MAXIMUM
ZENER
IMPEDANCE
(Note 1)
Z
ZT
VOLTAGE
TEMPERATURE
STABILITY
∆V
ZT
-55° to +100°
(Note 2)
EFFECTIVE
TEMPERATURE
COEFFICIENT
MILLIMETERS
INCHES
MIN MAX MIN MAX
1.60
1.70 0.063 0.067
0.41
0.55 0.016 0.022
3.30
3.70 .130 .146
2.54 REF.
.100 REF.
0.03 MIN.
.001 MIN.
VOLTS
CDLL821
CDLL821A
CDLL822
†
CDLL823
CDLL823A
CDLL824
†
CDLL825
CDLL825A
CDLL826
CDLL827
CDLL827A
CDLL828
CDLL829
CDLL829A
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
5.9 - 6.5
6.2 - 6.9
5.9 - 6.5
5.9 - 6.5
6.2 - 6.9
5.9 - 6.5
5.9 - 6.5
mA
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
7.5
OHMS
15
10
15
15
10
15
15
10
15
15
10
15
15
10
mV
96
96
96
48
48
48
19
19
20
9
9
10
5
5
% / °C
0.01
0.01
0.01
0.005
0.005
0.005
0.002
0.002
0.002
0.001
0.001
0.001
0.0005
0.0005
FIGURE 1
DESIGN DATA
CASE:
DO-213AA, Hermetically sealed
glass case. (MELF, SOD-80, LL34)
LEAD FINISH:
Tin / Lead
POLARITY:
Diode to be operated with
the banded (cathode) end positive.
MOUNTING POSITION:
Any.
MOUNTING SURFACE SELECTION:
The Axial Coefficient of Expansion
(COE) Of this Device is Approximately
+6PPM/°C. The COE of the Mounting
Surface System Should Be Selected To
Provide A Suitable Match With This
Device.
† Double Anode: Electrical Specifications Apply Under Both Bias Polarities.
NOTE 1
Zener impedance is derived by superimposing on lZT A 60Hz rms a.c. current
equal to 10% of lZT.
The maximum allowable change observed over the entire temperature range i.e.,
the diode voltage will not exceed the specified mV at any discrete temperature
between the established limits, per JEDEC standard No.5.
NOTE 2
22 COREY STREET, MELROSE, MASSACHUSETTS 02176
PHONE (781) 665-1071
FAX (781) 665-7379
WEBSITE: http://www.cdi-diodes.com
E-mail: mail@cdi-diodes.com
CDLL821
thru
CDLL829A
500
Pd, Rated Power Dissipation (mW)
600
500
400
300
200
100
0
0
25
50
75
100
125
150
175
TL, Ambient temperature (°C)
ZENER IMPEDANCE ZZT (OHMS)
100
50
10
5
FIGURE 2
POWER DERATING CURVE
1
5
6
7
8
9
10
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE
VS.
OPERATING CURRENT
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
+.0010
+.0005
0
-.0005
-.0010
5.5
6.0
6.5
7.0
7.5
8.0
8.5
9.0
OPERATING CURRENT lZT (mA)
9.5
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE
COEFFICIENT WITH CHANGE IN
OPERATING CURRENT
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