HT12E, ►Elektronika, ►Aplikacje
[ Pobierz całość w formacie PDF ]
2
12
Series of Encoders
HT12A/HT12E
Features
Operating voltage
2.4V~5V for the HT12A
2.4V~12V for the HT12E
Low power and high noise immunity CMOS
technology
Low standby current: 0.1
A (typ.) at
V
DD
=5V
HT12A with a 38kHz carrier for infrared
transmission medium
Minimum transmission word
Four words for the HT12E
One word for the HT12A
Built-in oscillator needs only 5% resistor
Data code has positive polarity
Minimal external components
HT12A/E: 18-pin DIP/20-pin SOP package
Applications
Burglar alarm system
Smoke and fire alarm system
Garage door controllers
Car door controllers
Car alarm system
Security system
Cordless telephones
Other remote control systems
General Description
The 2
12
encoders are a series of CMOS LSIs for
remote control system applications. They are
capable of encoding information which consists
of N address bits and 12
N data bits. Each ad-
dress/data input can be set to one of the two
logic states. The programmed addresses/data
are transmitted together with the header bits
via an RF or an infrared transmission medium
upon receipt of a trigger signal. The capability
to select a TE trigger on the HT12E or a DATA
trigger on the HT12A further enhances the ap-
plication flexibility of the 2
12
series of encoders.
The HT12A additionally provides a 38kHz car-
rier for infrared systems.
Selection Table
Function
Address
No.
Address/
Data No.
Data
No.
Oscillator Trigger Package
Carrier
Output
Negative
Polarity
HT12A
8
0
4
455kHz
resonator
D8~D11
18 DIP
20 SOP
38kHz
No
HT12E
8
4
0
RC
oscillator
TE
18 DIP
20 SOP
No
No
Note: Address/Data represents pins that can be address or data according to the decoder require-
ment.
1
April 11, 2000
Part No.
HT12A/HT12E
Block Diagram
TE trigger
HT12E
DATA trigger
HT12A
Note: The address data pins are available in various combinations (refer to the address/data table).
2
April 11, 2000
HT12A/HT12E
Pin Assignment
Pin Description
Pin Name I/O
Internal
Connection
Description
CMOS IN
Pull-high
(HT12A)
A0~A7
I
NMOS
TRANSMISSION
GATE
PROTECTION
DIODE
(HT12E)
Input pins for address A0~A7 setting
These pins can be externally set to VSS or left open
AD8~AD11 I
NMOS
TRANSMISSION
GATE
PROTECTION
DIODE
(HT12E)
Input pins for address/data AD8~AD11 setting
These pins can be externally set to VSS or left open
D8~D11
I
CMOS IN
Pull-high
Input pins for data D8~D11 setting and transmission en-
able, active low
These pins should be externally set to VSS or left open
(see Note)
DOUT
O
CMOS OUT
Encoder data serial transmission output
L/MB
I
CMOS IN
Pull-high
Latch/Momentary transmission format selection pin:
Latch: Floating or VDD
Momentary: VSS
3
April 11, 2000
HT12A/HT12E
Pin Name I/O
Internal
Connection
Description
TE
I
CMOS IN
Pull-high
Transmission enable, active low (see Note)
OSC1
I
OSCILLATOR 1 Oscillator input pin
OSC2
O OSCILLATOR 1 Oscillator output pin
X1
I
OSCILLATOR 2 455kHz resonator oscillator input
X2
O OSCILLATOR 2 455kHz resonator oscillator output
VSS
I
Negative power supply, grounds
VDD
I
Positive power supply
Note: D8~D11 are all data input and transmission enable pins of the HT12A.
TE is a transmission enable pin of the HT12E.
Approximate internal connections
Absolute Maximum Ratings
Supply Voltage (HT12A) ..............
0.3V to 5.5V
Supply Voltage (HT12E) ...............
0.3V to 13V
Input Voltage....................V
SS
0.3 to V
DD
+0.3V
Storage Temperature.................
50
Cto125
C
Operating Temperature...............
20
Cto75
C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maxi-
mum Ratings
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 expo-
sure to extreme conditions may affect device reliability.
4
April 11, 2000
HT12A/HT12E
Electrical Characteristics
HT12A
Ta=25
C
Test Conditions
Symbol
Parameter
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
3
5
V
3V
0.1
1
A
I
STB
Standby Current
Oscillator stops
5V
0.1
1
A
I
DD
3V
No load
f
OSC
=455kHz
200
400
A
Operating Current
5V
400
800
A
I
DOUT
Output Drive Current
5V
V
OH
=0.9V
DD
(Source)
1
1.6
mA
V
OL
=0.1V
DD
(Sink)
2
3.2
mA
V
IH
H
Input Voltage
0.8V
DD
V
DD
V
V
IL
L
Input Voltage
0
0.2V
DD
V
R
DATA
D8~D11 Pull-high
Resistance
5V
V
DATA
=0V
150
300
k
HT12E
Ta=25
C
Test Conditions
Symbol
Parameter
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
5
12
V
I
STB
3V
0.1
1
A
Standby Current
Oscillator stops
12V
2
4
A
I
DD
3V
No load
f
OSC
=3kHz
40
80
A
Operating Current
12V
150
300
A
I
DOUT
Output Drive Current
5V
V
OH
=0.9V
DD
(Source)
1
1.6
mA
V
OL
=0.1V
DD
(Sink)
1
1.6
mA
V
IH
H
Input Voltage
0.8V
DD
V
DD
V
V
IL
L
Input Voltage
0
0.2V
DD
V
f
OSC
Oscillator Frequency
5V R
OSC
=1.1M
3
kHz
R
TE
TE Pull-high Resistance 5V V
TE
=0V
1.5
3
M
5
April 11, 2000
[ Pobierz całość w formacie PDF ]
zanotowane.pl doc.pisz.pl pdf.pisz.pl chiara76.opx.pl
2
12
Series of Encoders
HT12A/HT12E
Features
Operating voltage
2.4V~5V for the HT12A
2.4V~12V for the HT12E
Low power and high noise immunity CMOS
technology
Low standby current: 0.1
A (typ.) at
V
DD
=5V
HT12A with a 38kHz carrier for infrared
transmission medium
Minimum transmission word
Four words for the HT12E
One word for the HT12A
Built-in oscillator needs only 5% resistor
Data code has positive polarity
Minimal external components
HT12A/E: 18-pin DIP/20-pin SOP package
Applications
Burglar alarm system
Smoke and fire alarm system
Garage door controllers
Car door controllers
Car alarm system
Security system
Cordless telephones
Other remote control systems
General Description
The 2
12
encoders are a series of CMOS LSIs for
remote control system applications. They are
capable of encoding information which consists
of N address bits and 12
N data bits. Each ad-
dress/data input can be set to one of the two
logic states. The programmed addresses/data
are transmitted together with the header bits
via an RF or an infrared transmission medium
upon receipt of a trigger signal. The capability
to select a TE trigger on the HT12E or a DATA
trigger on the HT12A further enhances the ap-
plication flexibility of the 2
12
series of encoders.
The HT12A additionally provides a 38kHz car-
rier for infrared systems.
Selection Table
Function
Address
No.
Address/
Data No.
Data
No.
Oscillator Trigger Package
Carrier
Output
Negative
Polarity
HT12A
8
0
4
455kHz
resonator
D8~D11
18 DIP
20 SOP
38kHz
No
HT12E
8
4
0
RC
oscillator
TE
18 DIP
20 SOP
No
No
Note: Address/Data represents pins that can be address or data according to the decoder require-
ment.
1
April 11, 2000
Part No.
HT12A/HT12E
Block Diagram
TE trigger
HT12E
DATA trigger
HT12A
Note: The address data pins are available in various combinations (refer to the address/data table).
2
April 11, 2000
HT12A/HT12E
Pin Assignment
Pin Description
Pin Name I/O
Internal
Connection
Description
CMOS IN
Pull-high
(HT12A)
A0~A7
I
NMOS
TRANSMISSION
GATE
PROTECTION
DIODE
(HT12E)
Input pins for address A0~A7 setting
These pins can be externally set to VSS or left open
AD8~AD11 I
NMOS
TRANSMISSION
GATE
PROTECTION
DIODE
(HT12E)
Input pins for address/data AD8~AD11 setting
These pins can be externally set to VSS or left open
D8~D11
I
CMOS IN
Pull-high
Input pins for data D8~D11 setting and transmission en-
able, active low
These pins should be externally set to VSS or left open
(see Note)
DOUT
O
CMOS OUT
Encoder data serial transmission output
L/MB
I
CMOS IN
Pull-high
Latch/Momentary transmission format selection pin:
Latch: Floating or VDD
Momentary: VSS
3
April 11, 2000
HT12A/HT12E
Pin Name I/O
Internal
Connection
Description
TE
I
CMOS IN
Pull-high
Transmission enable, active low (see Note)
OSC1
I
OSCILLATOR 1 Oscillator input pin
OSC2
O OSCILLATOR 1 Oscillator output pin
X1
I
OSCILLATOR 2 455kHz resonator oscillator input
X2
O OSCILLATOR 2 455kHz resonator oscillator output
VSS
I
Negative power supply, grounds
VDD
I
Positive power supply
Note: D8~D11 are all data input and transmission enable pins of the HT12A.
TE is a transmission enable pin of the HT12E.
Approximate internal connections
Absolute Maximum Ratings
Supply Voltage (HT12A) ..............
0.3V to 5.5V
Supply Voltage (HT12E) ...............
0.3V to 13V
Input Voltage....................V
SS
0.3 to V
DD
+0.3V
Storage Temperature.................
50
Cto125
C
Operating Temperature...............
20
Cto75
C
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maxi-
mum Ratings
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 expo-
sure to extreme conditions may affect device reliability.
4
April 11, 2000
HT12A/HT12E
Electrical Characteristics
HT12A
Ta=25
C
Test Conditions
Symbol
Parameter
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
3
5
V
3V
0.1
1
A
I
STB
Standby Current
Oscillator stops
5V
0.1
1
A
I
DD
3V
No load
f
OSC
=455kHz
200
400
A
Operating Current
5V
400
800
A
I
DOUT
Output Drive Current
5V
V
OH
=0.9V
DD
(Source)
1
1.6
mA
V
OL
=0.1V
DD
(Sink)
2
3.2
mA
V
IH
H
Input Voltage
0.8V
DD
V
DD
V
V
IL
L
Input Voltage
0
0.2V
DD
V
R
DATA
D8~D11 Pull-high
Resistance
5V
V
DATA
=0V
150
300
k
HT12E
Ta=25
C
Test Conditions
Symbol
Parameter
Min. Typ. Max. Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
5
12
V
I
STB
3V
0.1
1
A
Standby Current
Oscillator stops
12V
2
4
A
I
DD
3V
No load
f
OSC
=3kHz
40
80
A
Operating Current
12V
150
300
A
I
DOUT
Output Drive Current
5V
V
OH
=0.9V
DD
(Source)
1
1.6
mA
V
OL
=0.1V
DD
(Sink)
1
1.6
mA
V
IH
H
Input Voltage
0.8V
DD
V
DD
V
V
IL
L
Input Voltage
0
0.2V
DD
V
f
OSC
Oscillator Frequency
5V R
OSC
=1.1M
3
kHz
R
TE
TE Pull-high Resistance 5V V
TE
=0V
1.5
3
M
5
April 11, 2000
[ Pobierz całość w formacie PDF ]