HC49/4H Crystals
ISSUE 11; 13 MAY 2004
Delivery Options
s
Outline in mm - HC49/4H & HC49/4H-3L
4.0 max
4.0 max
鈭?.45
4.88鹵0.2
==
1 2 3
11.05
Pin connecitons
1. Crystal
2. Case & ground
3. Crystal
Common frequencies maybe available from stock
Lower height holders available please contact sales
office
鈭?.45
Holder Style
s
4.88鹵0.2
HC49/4H crystals are resistance welded, hermetically
sealed in an inert atmosphere with glass to metal seals
securing the lead wires
Holders suffixed 鈥樷€?L have a centre third wire which
grounds the case
11.05 max
12.7 min
LEADED
QUARTZ CRYSTALS
s
General Specifications
s
Load Capacitance (CL): 10pF to 75pF or Series
Drive Level: 500碌W max.
Static Capacitance (C0): 7pF max.
Ageing: 鹵5ppm typical per year, 鹵1ppm available on
request
Typical Frequency vs Temperature Curves
for various angles of AT-cut crystals
+25
s
s
s
Standard Frequency Tolerances and Stabilities
s
鈭唂/f0
(ppm)
鹵10ppm, 鹵20ppm, 鹵30ppm, 鹵50ppm, 鹵100ppm, tighter
tolerances and stabilites available on request.
Operating Temperature Ranges
s
0
0 to 50擄C
鈥?0 to 60擄C
鈥?0 to 70擄C
鈥?0 to 80擄C
鈥?0 to 90擄C
鈥?5 to 105擄C
Storage Temperature Range
s
鈥?5 to 125擄C
鈥?5
鈥?0
鈥?0
Environmental Specification
s
+25
Temperature (擄C)
4.7
4.7
12.7 min
s
+70
+100
Shock: 981m/s
-2
for 6ms, three shocks in each
direction along three mutually perpendicular planes
Vibration: 10 to 60Hz 0.75mm displacement, 60 to
500Hz 98.1m/s
-2
acceleration, 30 minutes in each of
three mutually perpendicular planes
Typical Frequency vs Temperature Curves
for various angles of BT-cut crystals
s
+10
0
Marking
s
Frequency only
Minimum Order Information Required
s
Frequency + Holder + Frequency Tolerance @ 25擄C +
Frequency Stability + Operating Temperature Range +
Circuit Condition + Overtone Order + Tape & Reel
Packaging Available
鈥?0
鈭唂/f0
(ppm)
鈥?0
鈥?0
+25
Temperature (擄C)
+70
+100
Europe Tel: +44 (0)1460 270200 Fax: +44 (0)1460 72578
Americas Tel: +1 919 941 9333 Fax: +1 919 941 9371
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Website: www.cmac.com/mt/
Asia Tel: +86 (21) 6468 6663 Fax: +86 (21) 6428 2466
Eur
Am
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