Model: HC18U21-4MHZ

Quartz Crystal Unit

Properties:

Overall Length
0.530 inches
Terminal Length
0.500 inches
Overall Width
0.435 inches
Body Width
0.402 inches
Body Thickness
0.150 inches
Overall Thickness
0.183 inches
Terminal Diameter
Between 0.016 inches and 0.019 inches
Mode Of Oscillation
Third overtone
Circuit Resonance
Series resonance
Shunt Capacitance In Picofarads
7.0
Specified Frequency
21.400 megahertz
Holder Cover Material
Metal
Operating Tempurature Range
-55.0/+105.0 degrees celsius
Center To Center Distance Between Terminals
0.184 mils and 0.200 centimeters
Center To Center Distance Between Terminals
0.184 mils and 0.200 inches
Drive Level Rating
Between 1.6 milliwatts and 2.4 milliwatts
Frequency Tolerance For Operating Tempurature In Percent
-0.005/+0.005
Frequency Tolerance For Operating Tempurature In Percent
-0.005 to 0.005
Equivalent Resistance Value In Ohms
40.0
Style Designator
Oval body, wire leads
Test Data Document
81349-mil-c-3098 specification (includes engineering type bulletins, brochures, etc., that reflect specification type data in specification format; excludes commercial catalogs, industry directories, and similar trade publications, reflecting general type data on certain environmental and performance requirements and test conditions that are shown as "typical", "average", "", etc.).
Specification Data
81349-mil-c-3098/33 government specification
NSN
5955-00-119-8994
Part Number
HC18U21-4MHZ
Description
Crystal Unit,quartz
CAGE
81349

An item which consists of a quartz crystal resonator(s), suitably mounted in a holder, quartz crystal.

Part HC18U21-4MHZ NSN 5955-00-119-8994

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00196
FIIG:
A059A0
Concept No.:
App. Key:
A
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
0.1000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
061700
UFC:
34580
LTL:
RATING VARIABLE
LCL:
--
WCC:
657
TCC:
Z
SHC:
9
ACC:
Instruments/Radio

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Schedule B and Export
  • Schedule B: 8541900000
  • SITC: 77688
  • End Use: Semiconductors
  • NAICS: 334413
  • USDA: 1

Freight Class: Diode, transistor & similar semiconductor device parts

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