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Metal Key Base Cover
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  • description
  • TECHNICAL PARAMETERS
  • As a professional keyboard (metal key base cover + capacitive sensing switch) manufacturer, Sierde is specialized in the R&D, design, manufacturing and integration of the keyboards (metal key base cover + capacitive sensing switch) used in the fields of industrial control, finance, telecommunications, tax administration, touch tablet, medical apparatus and instruments, security and protection entrance control and test instruments.

  • All stainless steel or organic boards and keys are supported by precise dies with beautiful and elegant surface treatment and able to provide PS2 and USB interface.
  • Keys produced with multiple processes with a variety of cutting and machining techniques, flexible in shape, firm and reliable.
  • The keys are etched with imported high-intensity printing ink, durable and wear-proof.
  • Service life: the service life of each key >500,000 times:
  • Response time: <5MS
  • Key journey: 0.45mm
  • Key force (optional): 200~420GF
  • Working temperature: -30℃~+80℃≤1500VDC
  • Storage temperature: -40℃~85℃
  • Operating humidity: <95%

Electric parameters:

  • Parameter

    Sign

    Condition

    Value

    Unit

    Working temperature

    TOP

    ---

    -20 ~ +70

    Storage temperature

    TSTG

    ---

    -50 ~ +125

    Power voltage

    VDD

    Ta=25°

    VSS-0.3 ~ VSS+5.5

    V

    Input voltage

    VIN

    Ta=25°

    VSS-0.3 ~ VDD+0.3

    V

    Antistatic strength of chips

    HBM ESD

    ---

    ≧4

    KV

  • Parameter

    Sign

    Test

    Minimum Value

    Typical value

    Maximum value

    Unit

    Working voltage

    VDD


    2.0

    3.0

    5.5

    V

    Working current

    IOP

    VDD=3.0V

    --

    3.5

    7.0

    uA

    Input end

    VOL

    Input low voltag

    0

    --

    0.2

    VDD

    Input end

    VOH

    Input High Voltage

    0.8

    --

    1.0

    VDD

    Output response time

    TR

    VDD=3.0

    --

    --

    60

    ms

    Sensor

    FSEN

    VDD=3.0 non-loaded

    --

    --

    1

    Mhz

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