HC494H-3L データシートの表示（PDF） - Unspecified
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HC494H-3L Datasheet PDF : 3 Pages
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HC49/4H Crystals
ISSUE 11; 13 MAY 2004
Delivery Options
s Common frequencies maybe available from stock
s Lower height holders available please contact sales
office
Holder Style
s HC49/4H crystals are resistance welded, hermetically
sealed in an inert atmosphere with glass to metal seals
securing the lead wires
s Holders suffixed ‘–3L have a centre third wire which
grounds the case
General Specifications
s Load Capacitance (CL): 10pF to 75pF or Series
s Drive Level: 500µW max.
s Static Capacitance (C0): 7pF max.
s Ageing: ±5ppm typical per year, ±1ppm available on
request
Standard Frequency Tolerances and Stabilities
s ±10ppm, ±20ppm, ±30ppm, ±50ppm, ±100ppm, tighter
tolerances and stabilites available on request.
Operating Temperature Ranges
s 0 to 50°C –30 to 80°C
–10 to 60°C –40 to 90°C
–20 to 70°C –55 to 105°C
Storage Temperature Range
s –55 to 125°C
Environmental Specification
s Shock: 981m/s-2 for 6ms, three shocks in each
direction along three mutually perpendicular planes
s Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s-2 acceleration, 30 minutes in each of
three mutually perpendicular planes
Marking
s Frequency only
Minimum Order Information Required
s Frequency + Holder + Frequency Tolerance @ 25°C +
Frequency Stability + Operating Temperature Range +
Circuit Condition + Overtone Order + Tape & Reel
Packaging Available
Outline in mm - HC49/4H & HC49/4H-3L
∅0.45
4.88±0.2
∅0.45
4.88±0.2 = =
12 3
11.05 max
11.05
Pin connecitons
1. Crystal
2. Case & ground
3. Crystal
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
+25
0
–25
–50
–20
+25
+70
Temperature (°C)
Typical Frequency vs Temperature Curves
for various angles of BT-cut crystals
+10
0
+100
–50
–50
–20
+25
+70
Temperature (°C)
+100
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578
Website: www.cmac.com/mt/
Eur
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
1
Asia Tel: +86 (21) 6468 6663 Fax: +86 (21) 6428 2466
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