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UM5 & UM4 CRYSTALS
ISSUE 6; 12 JANUARY 1996
Delivery Options
Please contact our sales office for current leadtimes
Holder Style
UM5 & UM4 crystals are resistance welded, hermeti-
cally sealed in an inert atmosphere with glass to metal
seals securing the lead wires
Holders suffixed ‘–3L have a centre third wire which
grounds the case
General Specifications
Load Capacitance (C
L
): 10pF to 75pF or Series
Drive Level: 1mW max.
Static Capacitance (C
0
): 6pF max
Ageing: ±3ppm typical per year
Standard Frequency Tolerances and Stabilities
±5ppm, ±10ppm, ±15ppm, ±20ppm, ±30ppm,
±50ppm, ±100ppm
Operating Temperature Ranges
0 to 50°C
–10 to 60°C
–20 to 70°C
–30 to 80°C
–40 to 90°C
–55 to 105°C
Storage Temperature Range
–55 to 125°C
Environmental Specification
Shock: 981m/s
2
for 6ms, three shocks in each direc-
tion along three mutually perpendicular planes
Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s
acceleration, 30 minutes in each of
three mutually perpendicular planes
Marking
Includes Frequency
Minimum Order Information Required
Frequency + Holder + Frequency Tolerance @ 25°C
+ Frequency Stability + Operating Temperature
Range + Circuit Condition + Overtone Order
EuropeTel:+44(0)146074433
Fax:+44(0)146072578
18
Americas Tel:+19199410430
Fax:+19199410530
Q
C
," "
) + - *
) *. / + #
) + - *
Outline in mm (inches) - UM5 & UM5-3L
," "
) + - *
) *. / + #
) + - *
Outline in mm (inches) - UM4 & UM4-3L
' +# + )
%
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals