3
18
Series of Encoders
Selection Table
Function Address
No.
Address/
Data No.
Data
No.
Dummy
Code No. Oscillator
Trigger
Package
Part No.
HT600
9
5
0
4
RC oscillator
TE
20 DIP/20 SOP
HT640
10
8
0
0
RC oscillator
TE
24 SOP/24 SDIP
HT680
8
4
0
6
RC oscillator
TE
18 DIP
HT6187
9
0
3
6
RC oscillator D12,D14,D15 18 DIP/20 SOP
HT6207
10
0
4
4
RC oscillator
D12~D15
20 DIP/20 SOP
HT6247
12
0
6
0
RC oscillator
D12~D17
24 SOP/24 SDIP
Note: Address/Data represents addressable pins or data according to the decoder requirements.
1
July 8, 1999
General Description
The 3
18
encoders are a series of CMOS LSIs for
remote control system applications. They are
capable of encoding 18 bits of information
which consists of N address bits and 18-N data
bits. Each address/data input is externally
trinary programmable if bonded out. It is other-
wise set floating internally. Various packages of
the 3
18
encoders offer flexible combinations of
programmable address/data to meet various
application needs. The programmable ad-
dress/data is transmitted together with the
header bits via an RF or an infrared transmis-
sion medium upon receipt of a trigger signal.
The capability to select a TE trigger type or a
DATA trigger type further enhances the appli-
cation flexibility of the 3
18
series of encoders.
Features
Operating voltage: 2.4V~12V
Low power and high noise immunity CMOS
technology
Low standby current
Three words transmission
Built-in oscillator needs only 5% resistor
Easy interface with an RF or infrared trans-
mission media
Minimal external components
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
Block Diagram
TE trigger
DATA trigger
HT600/HT640/HT680
HT6187/HT6207/HT6247
Note: The address/data pins are available in various combinations.
Pin Assignment
3
18
Series of Encoders
2
July 8, 1999
O s c i l l a t o r
3 3 D i v i d e r
O S C 1
O S C 2
V D D
V S S
1 8
T r a n s m i s s i o n
G a t e C i r c u i t
1 8 C o u n t e r
& 1 o f 1 8
D e c o d e r
T r i n a r y
D e t e c t o r
A 0
A 9
A D 1 7
D O U T
D a t a S e l e c t
& B u f f e r
S y n c .
C i r c u i t
O s c i l l a t o r
3 3 D i v i d e r
O S C 1
O S C 2
V D D
V S S
1 8
T r a n s m i s s i o n
G a t e C i r c u i t
1 8 C o u n t e r
& 1 o f 1 8
D e c o d e r
T r i n a r y
D e t e c t o r
D O U T
D a t a S e l e c t
& B u f f e r
S y n c .
C i r c u i t
L E D C i r c u i t
L E D
T E
A D 1 0
A 0
A 1 1
D 1 7
D 1 2
9 - A d d r e s s
5 - A d d r e s s / D a t a
1 0 - A d d r e s s
8 - A d d r e s s / D a t a
H T 6 4 0
2 4 S O P / S D I P
H T 6 0 0
2 0 D I P / S O P
T E t r i g g e r t y p e
8 - A d d r e s s
4 - A d d r e s s / D a t a
H T 6 8 0
1 8 D I P / S O P
V D D
A D 1 0
A 9
A 8
A 7
A 6
A 5
A 4
A 3
A 2
A 1
A 0
A D 1 1
A D 1 2
A D 1 3
A D 1 4
A D 1 5
A D 1 6
A D 1 7
D O U T
T E
O S C 2
O S C 1
V S S
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
V D D
A 9
A 8
A 7
A 6
A 3
A 2
A 1
A 0
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
1
2
3
4
5
6
7
8
9
A D 1 1
A D 1 2
A D 1 4
A D 1 5
D O U T
T E
O S C 2
O S C 1
V S S
V D D
A 9
A 8
A 7
A 6
A 4
A 3
A 2
A 1
A 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1
2
3
4
5
6
7
8
9
1 0
A D 1 1
A D 1 2
A D 1 3
A D 1 4
A D 1 5
D O U T
T E
O S C 2
O S C 1
V S S
Pin Description
Pin Name I/O
Internal
Connection
Description
A0~A11
I
TRANSMISSION
GATE
Input pins for address A0~A11 setting
They can be externally set to VDD, VSS, or left open.
AD10~AD17
I
TRANSMISSION
GATE
Input pins for address/data (AD10~AD17) setting
They can be externally set to VDD, VSS, or left open.
D12~D17
I
CMOS IN
Pull-low
Input pins for data (D12~D17) setting and transmission
enable (active high)
They an be externally set to VDD or left open (see Note).
DOUT
O
CMOS OUT
Encoder data serial transmission output
LED
O
NMOS OUT
LED transmission enable indicator
TE
I
CMOS IN
Pull-low
Transmission enable, active high (see Note).
OSC1
I
OSCILLATOR
Oscillator input pin
OSC2
O
OSCILLATOR
Oscillator output pin
VSS
I
Negative power supply (GND)
VDD
I
Positive power supply
Notes: D12~D17 are data input and transmission enable pins of the HT6187/HT6207/HT6247.
TE is the transmission enable pin of the HT600/HT640/HT680.
3
18
Series of Encoders
3
July 8, 1999
D A T A t r i g g e r t y p e
9 - A d d r e s s
3 - D a t a
1 0 - A d d r e s s
4 - D a t a
H T 6 2 0 7
2 0 D I P / S O P
H T 6 1 8 7
1 8 D I P
9 - A d d r e s s
3 - D a t a
H T 6 1 8 7
2 0 S O P
1 2 - A d d r e s s
6 - D a t a
H T 6 2 4 7
2 4 S O P / S D I P
A 1 1
D 1 2
D 1 4
D 1 5
D O U T
L E D
O S C 2
O S C 1
V S S
A 9
A 8
A 7
A 6
A 3
A 2
A 1
A 0
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
1
2
3
4
5
6
7
8
9
N C
A 1 1
D 1 2
D 1 4
D 1 5
D O U T
L E D
O S C 2
O S C 1
V S S
1
2
3
4
5
6
7
8
9
1 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
N C
V D D
A 9
A 8
A 7
A 6
A 3
A 2
A 1
A 0
A 1 1
D 1 2
D 1 3
D 1 4
D 1 5
D O U T
L E D
O S C 2
O S C 1
V S S
1
2
3
4
5
6
7
8
9
1 0
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
V D D
A 9
A 8
A 7
A 6
A 4
A 3
A 2
A 1
A 0
A 1 1
D 1 2
D 1 3
D 1 4
D 1 5
D 1 6
D 1 7
D O U T
L E D
O S C 2
O S C 1
V S S
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
V D D
A 1 0
A 9
A 8
A 7
A 6
A 5
A 4
A 3
A 2
A 1
A 0
V D D
Approximate internal connection circuits
Absolute Maximum Ratings
Supply Voltage...............................-0.3V to 13V
Input Voltage ...................V
SS
-0.3 to V
DD
+0.3V
Storage Temperature.................-50C to 125C
Operating Temperature ..............-20C to 75C
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 de-
vice at other conditions beyond those listed in the specification is not implied and prolonged
exposure to extreme conditions may affect device reliability.
Electrical Characteristics
Ta=25C
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
V
DD
Operating Voltage
2.4
12
V
I
STB
Standby Current
3V
Oscillator stops
0.1
1
mA
12V
2
4
mA
I
DD
Operating Current
5V No load
f
OSC
=100kHz
250
500
mA
12V
1200
2400
mA
I
LED
LED Sink Current
5V V
LED
=0.5V
1.5
3
mA
I
DOUT
Output Drive Current
5V V
OH
=0.9V
DD
(Source)
-0.6
-1.2
mA
5V V
OL
=0.1V
DD
(Sink)
0.6
1.2
mA
3
18
Series of Encoders
4
July 8, 1999
T R A N S M I S S I O N
G A T E
C M O S I N
P u l l - l o w
C M O S O U T
O S C I L L A T O R
O S C 1
O S C 2
E N
N M O S O U T
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
Conditions
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
10V R
OSC
=330kW
100
kHz
R
TE
TE Pull-low Resistance
5V
V
TE
=5V
1.5
3
MW
R
DATA
D12~D17 Pull-low
Resistance
5V V
DATA
=5V
1.5
3
MW
Functional Description
Operation
The 3
18
series of encoders begins a three-word transmission cycle upon receipt of a transmission en-
able (TE for the HT600/HT640/HT680 or D12~D17 for the HT6187/HT6207/HT6247, active high).
This cycle will repeat itself as long as the transmission enable (TE or D12~D17) is held high. Once
the transmission enable falls low, the encoder output completes its final cycle and then stops as
shown below.
Information word
An information word consists of 4 periods as shown:
3
18
Series of Encoders
5
July 8, 1999
3 w o r d s
3 w o r d s
E n c o d e r
D a t a O u t
T r a n s m i t t e d
C o n t i n u o u s l y
< 1 w o r d
T E o r
D 1 2 ~ D 1 7
Transmission timing
P i l o t p e r i o d
( 6 b i t s )
A d d r e s s c o d e p e r i o d
D a t a c o d e p e r i o d
1 / 6 b i t
S y n c . p e r i o d
Composition of information
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