HT6P20A Ver la hoja de datos (PDF) - Holtek Semiconductor
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HT6P20A Datasheet PDF : 13 Pages
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HT6P20X Series
Absolute Maximum Ratings
Supply Voltage ...........................VSS-0.3V to VSS+12V
Input Voltage..............................VSS-0.3V to VDD+0.3V
Storage Temperature ............................-50°C to 125°C
Operating Temperature...........................-20°C to 75°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Electrical Characteristics
Symbol
VDD
ISTB
IDD
VIH
VIL
RPH
IDOUT
fOSC
Parameter
Operating Voltage
Standby Current
Operating Current
²H² Input Voltage
²L² Input Voltage
D0~D7 Pull-high Resistance
Output Current
Source
Sink
Oscillator Frequency
Test Conditions
VDD
Conditions
¾
¾
12V Oscillator stops
12V No load, fOSC=3kHz
¾
¾
¾
¾
12V
¾
5V 0.9VDD
12V 0.9VDD
5V 0.1VDD
12V 0.1VDD
12V ROSC=1.4MW
Min.
2
¾
¾
0.8VDD
0
¾
-2
-6.5
2
6
¾
Typ.
¾
1
200
¾
¾
150
-5
-15
5
15
3
Ta=25°C
Max. Unit
12
V
2
mA
400
mA
VDD
V
0.2VDD
V
300
kW
¾
mA
¾
mA
¾
mA
¾
mA
¾
kHz
Functional Description
Normal Operation
The HT6P20X encodes and transmits address/data to a decoder upon receipt of a trigger signal. The address codes of
the HT6P20A are always transmitted as long as power (VDD) is supplied. The transmission function of the HT6P20B/D
is enabled by the D0~D7 pins (active low). The following is the transmission timing of the HT6P20X:
D0 ~ D7
E ncoder
DOUT
< 1 w o rd
> 1 w o rd
Transmission timing
A complete code word of the HT6P20D consists of 3 periods as shown below.
fo s c
DOUT
1 c lo c k
p ilo t p e r io d
( 2 3 c lo c k s )
1 /3 b it
( A 0 ~ A 1 9 , 6 0 c lo c k s )
a d d r e s s c o d e p e r io d
( D 3 ~ D 0 , 1 2 c lo c k s )
d a ta c o d e p e r io d
A complete code word for the HT6P20D
0
1
0
1
a n ti- c o d e p e r io d
( 4 b its )
Rev. 1.40
3
June 20, 2003
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