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
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.
MILLIMETERS INCHES
DIM MIN MAX MIN MAX
D 1.60 1.70 0.063 0.067
F 0.41 0.55 0.016 0.022
G 3.30 3.70 .130 .146
G1 2.54 REF. .100 REF.
S 0.03 MIN. .001 MIN.
• 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
NOTE 1 Zener impedance is derived by superimposing on lZTA 60Hz rms a.c. current
equal to 10% of lZT.
NOTE 2 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.
CDI ZENER ZENER MAXIMUM VOLTAGE TEMPERATURE EFFECTIVE
TYPE VOLTAGE TEST ZENER TEMPERATURE RANGE TEMPERATURE
NUMBER CURRENT IMPEDANCE STABILITY COEFFICIENT
VZ@ I ZT I ZT ZZT ∆V ZT
MAXIMUM
(Note 1) (Note 2)
VOLTS mA OHMS mV °C % / °C
CDLL935 8.55 - 9.45 7.5 20 67 0 to + 75 0.01
CDLL935A 8.55 - 9.45 7.5 20 139 -55 to +100 0.01
CDLL935B 8.55 - 9.45 7.5 20 184 -55 to +150 0.01
CDLL936 8.55 - 9.45 7.5 20 34 0 to + 75 0.005
CDLL936A 8.55 - 9.45 7.5 20 70 -55 to +100 0.005
CDLL936B 8.55 - 9.45 7.5 20 92 -55 to +150 0.005
CDLL937 8.55 - 9.45 7.5 20 13 0 to + 75 0.002
CDLL937A 8.55 - 9.45 7.5 20 28 -55 to +100 0.002
CDLL937B 8.55 - 9.45 7.5 20 37 -55 to +150 0.002
CDLL938 8.55 - 9.45 7.5 20 6.7 0 to + 75 0.001
CDLL938A 8.55 - 9.45 7.5 20 13.9 -55 to +100 0.001
CDLL938B 8.55 - 9.45 7.5 20 19 -55 to +150 0.001
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 & VR= 6 Vdc
ELECTRICAL CHARACTERISTICS @ 25°C, unless otherwise specified.
CDLL935
thru
CDLL938B
0 25 50 75 100 125 150 175
TL, Ambient temperature (°C)
FIGURE 2
POWER DERATING CURVE
600
500
400
300
200
100
0
Pd, Rated Power
Dissipation (mW)
5678910
OPERATING CURRENT lZT (mA)
FIGURE 3
ZENER IMPEDANCE VS. OPERATING CURRENT
CHANGE IN TEMPERATURE COEFFICIENT ( %/°C)
100
50
40
30
20
10
5
4
3
2
1
ZENER IMPEDANCE ZZT (OHMS)
+.0015
+.0010
+.0005
0
-.0005
-.0010
-.0015
56 78 910
OPERATING CURRENT lZT (mA)
FIGURE 4
TYPICAL CHANGE OF TEMPERATURE COEFFICIENT
WITH CHANGE IN OPERATING CURRENT
