• 1N935BUR-1, 1N937BUR-1 and 1N938BUR-1 AVAILABLE IN
JAN, JANTX, JANTXV AND JANS
PER MIL-PRF-19500/156
• TEMPERATURE COMPENSATED ZENER REFERENCE DIODES
• LEADLESS PACKAGE FOR SURFACE MOUNT
• 9.0 VOLT NOMINAL ZENER VOLTAGE
• METALLURGICALLY BONDED, DOUBLE PLUG CONSTRUCTION
1N935BUR-1 thru 1N938BUR-1
and
CDLL935 thru CDLL938B
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
= 10
µ
A @ 25°C & V
R
= 6 Vdc
ELECTRICAL CHARACTERISTICS
@ 25°C, unless otherwise specified.
DIM
D
F
G
G1
S
CDI
TYPE
NUMBER
ZENER
VOLTAGE
VZ@ I ZT
ZENER
TEST
CURRENT
I ZT
MAXIMUM
VOLTAGE
TEMPERATURE
EFFECTIVE
ZENER
TEMPERATURE
RANGE
TEMPERATURE
IMPEDANCE
STABILITY
COEFFICIENT
ZZT
³V ZT
MAXIMUM
(Note 1)
(Note 2)
mV
67
139
184
34
70
92
13
28
37
6.7
13.9
19
°C
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
0 to + 75
-55 to +100
-55 to +150
% / °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
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
CDLL935
CDLL935A
CDLL935B
CDLL936
CDLL936A
CDLL936B
CDLL937
CDLL937A
CDLL937B
CDLL938
CDLL938A
CDLL938B
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
8.55 - 9.45
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
OHMS
20
20
20
20
20
20
20
20
20
20
20
20
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.
NOTE 1
Zener impedance is derived by superimposing on lZTA 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
6 LAKE STREET, LAWRENCE, MASSACHUSETTS 01841
PHONE (978) 620-2600
FAX (978) 689-0803
WEBSITE: http://www.microsemi.com
99
thru
Pd, Rated Power
Dissipation (mW)
CDLL935
CDLL938B
600
500
400
300
200
100
0
0
25
50
75
100
125
150
175
TL, Ambient temperature (°C)
FIGURE 2
POWER DERATING CURVE
100
50
40
30
20
ZENER IMPEDANCE Z
(OHMS)
ZT
10
5
4
3
2
1
5
6
7
8
9
OPERATING CURRENT lZT (mA)
10
FIGURE 3
ZENER IMPEDANCE VS. OPERATING CURRENT
+.0015
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
+.0010
+.0005
0
-.0005
-.0010
-.0015
5
6
7
8
OPERATING CURRENT lZT (mA)
9
10
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT
100
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