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HT82K68 Datasheet(PDF) 6 Page - Holtek Semiconductor Inc

Part # HT82K68
Description  Multimedia Keyboard Encoder OTP
PDF  40 Pages
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Manufacturer  HOLTEK [Holtek Semiconductor Inc]
Direct Link  http://www.holtek.com
Logo HOLTEK - Holtek Semiconductor Inc

HT82K68 Datasheet(HTML) 6 Page - Holtek Semiconductor Inc

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A.C. Characteristics
Ta=25°C
Symbol
Parameter
Test Conditions
Min. Typ. Max. Unit
VDD
Conditions
fSYS1
System Clock
(Crystal OSC)
3V
¾¾
2
¾
MHz
5V
¾¾
2
20
MHz
fSYS2
System Clock (RC OSC)
3V
¾¾
2
¾
MHz
5V
¾¾
2
20
MHz
tWDTOSC Watchdog Oscillator
3V
¾
45
90
180
ms
5V
¾
35
65
130
ms
tWDT1
Watchdog Time-out
Period (RC)
3V
Without WDT
prescaler
12
23
45
ms
5V
9
17
35
ms
tWDT2
Watchdog Time-out
Period (System Clock)
¾
Without WDT
prescaler
¾
1024
¾
tSYS
tRES
External Reset Low
Pulse Width
¾¾
1
¾¾
ms
tSST
System Start-up Timer
Period
¾
Power-up or
wake-up from HALT ¾
1024
¾
tSYS
tINT
Interrupt Pulse Width
¾¾
1
¾¾
ms
Note: tSYS= 1/fSYS
HT82K68E
6
August 8, 2000
Preliminary



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