2
16
/2
12
RF Encoder
HT16C2T3/HT16E2T3/HT16G2T3
HT16C2T4/HT16E2T4/HT16G2T4
HT12C2T3/HT12E2T3
HT12C2T4/HT12E2T4
Revision: V.1.00
Date: ½an½a½½ ½½½ ½011
HT16x2Tx/HT12x2Tx
2
16
/2
12
RF Encoder
Table of Contents
Features ......................................................................................................................... 1
Applications ................................................................................................................... 1
General Description ...................................................................................................... 1
Naming for Selection Guide ......................................................................................... 2
Block Diagram ............................................................................................................... 2
Pin Assignment ............................................................................................................. 3
Pin Description .............................................................................................................. 3
Absolute Maximum Ratings ......................................................................................... 4
Functional Description ................................................................................................. 5
Address/Data Waveform ............................................................................................... 5
Bit Time (Td).........................................................................................................................5
Code Wo½d ...........................................................................................................................6
Operation Flowchart ..................................................................................................... 7
Application Circuit ........................................................................................................ 7
Package Information ..................................................................................................... 8
½0-pin SSOP (150mil) O½tline Dimensions ..........................................................................½
Reel Dimensions ..................................................................................................................9
Ca½½ie½ Tape Dimensions ....................................................................................................10
Rev. 1.00
i
½an½a½½ ½½½ ½011
HT16x2Tx/HT12x2Tx
2
16
/2
12
RF Encoder
Features
●
Operating voltage: 2V ~ 3.6V
●
Low standby current: 1µA (typ.) at V
DD
=3V
●
Data trigger function
●
Provides 2 compound Data trigger pins
●
Minimum four transmission words
●
Integrated oscillator – no external resistor
●
Positive polarity data codes
●
Integrated complete UHF transmitter
●
Frequency range 300MHz to 450MHz
●
Support ASK/OOK modulation
●
Output power up to 10dBm
●
Minimal external components
●
20-pin SSOP
Applications
●
Burglar alarm systems
●
Smoke and fire alarm systems
●
Personal alarm system
●
Car/Garage door controllers
●
Home/office/car security systems
●
Cordless telephones
●
Other remote control systems
General Description
The HT16x2Tx/HT12x2Tx are a series of encoders which include a 300M~450MHz ASK
transmitter for remote control system applications. These highly integrated devices are true “switch-
in, antenna-out” monolithic devices. They are capable of encoding information consisting of N
address bits and 16- N data bits. Each address/data input can be set to one of two logic states.
The programmed addresses/data is transmitted together with the header bits via RF upon receipt
of a trigger signal. The capability to select a DATA trigger on the HT16x2Tx/HT12x2Tx further
enhances the application flexibility of the 2
16
series of encoders.
The devices offer high performance in the areas of power delivery and operating temperature.
In terms of power, the devices are capable of delivering +10 dBm into a 50Ω load. This power
level enables a small form factor transmitter such as a key fob transmitter to operate near the
maximum limit of transmission regulations. In terms of temperature, the devices can operate from
-40°C to 85°C with minor frequency drift. When compared with SAW solutions, wider operation
temperatures are obtainable. The also offer exceptional ease of use. It is only necessary to provide a
crystal reference frequency source, which has a frequency equal to the RF carrier frequency divided
by 32, together with a few additional external components to implement a complete and versatile
transmitter. The devices operate using ASK/OOK - Amplitude Shift Keying/On-Off Keyed - UHF
receiver types from wide-band super-regenerative radios to narrow-band, high performance super-
heterodyne receivers.
Rev. 1.00
1
½an½a½½ ½½½ ½011
HT16x2Tx/HT12x2Tx
2
16
/2
12
RF Encoder
Naming for Selection Guide
HTxx_x_x_Tx
Carrier Frequency
3: 300MHz~365MHz
4: 365MHz~450MHz
Bit Time (Td)
2: 1ms
Address (Dip switch) No.
C: 6
E: 8
G: 10 (not available for HT12xTx)
Total Address + Data (Trigger) No.
12: 12 / 20SSOP package
16: 14 / 20SSOP package
Block Diagram
DOUT
OSC2
OSC1
CREF
Oscillator
PAOUT
÷3 Divider
A9/D9
÷18 Counter &
1 of 18 Decoder
Binary Detector
A15/D15
18 Transmission
Gate Circuit
Data Select
& Buffer
Sync.
Circuit
EN
315M/433MHz
ASK Tx
A0/D0
A8/D8
VDD
VSS
Rev. 1.00
½
½an½a½½ ½½½ ½011
HT16x2Tx/HT12x2Tx
2
16
/2
12
RF Encoder
Pin Assignment
D2
D2
D1
D1
D0
D0
A3
A3
A2
A2
A1
4-Address
8-Data
4-Address
8-Data
20
1
20
1
19
2
19
2
18
3
18
3
17
4
17
16
54
16
5
15
6
15
6
14
7
14
13
87
13
8
12
9
12
9
11
10
11
10
HT12A2Tx
HT12A2Tx
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
B0
D0
D0
A5
A5
A4
A4
A3
A3
A2
A2
A1
6-Address
6-Data
6-Address
6-Data
20
1
20
1
19
2
19
2
18
3
18
3
17
4
17
16
54
16
5
15
6
15
6
14
7
14
13
87
13
8
12
9
12
9
11
10
11
10
HT12C2Tx
HT12C2Tx
D1
D1
D2
D2
D3
D3
D4
D4
D5
D5
B0
A6
A6
A5
A5
A4
A4
A3
A3
A2
A2
A1
8-Address
4-Data
8-Address
4-Data
20
1
20
1
19
2
19
2
18
3
18
3
17
4
17
16
54
16
5
15
6
15
6
14
7
14
13
87
13
8
12
9
12
9
11
10
11
10
HT12E2Tx
HT12E2Tx
A7
A7
D0
D0
D1
D1
D2
D2
D3
D3
B0
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
B0
B1
B1
XOUT
PAOUT
XOUT
XIN
XIN
DOUT
DOUT
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
B0
B1
B1
XOUT
PAOUT
XOUT
XIN
XIN
DOUT
DOUT
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
B0
B1
B1
XOUT
PAOUT
XOUT
XIN
XIN
DOUT
DOUT
D2
D2
D1
D1
D0
D0
A3
A3
A2
A2
A1
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
PAOUT
4-Address
10-Data
4-Address
10-Data
20
1
20
19
21
19
18
32
18
17
43
17
4
16
5
16
15
65
15
14
76
14
7
13
8
13
12
98
12
9
11
10
11
10
HT16A2Tx
HT16A2Tx
20SSOP
20SSOP
D3
D3
D4
D4
D5
D5
D6
D6
D7
D7
D8
D0
D0
A5
A5
A4
A4
A3
A3
A2
A2
A1
D8
D9
D9
XOUT
XOUT
XIN
XIN
DOUT
DOUT
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
PAOUT
6-Address
8-Data
6-Address
8-Data
20
1
20
19
21
19
18
32
18
17
43
17
4
16
5
16
15
65
15
14
76
14
7
13
8
13
12
98
12
9
11
10
11
10
HT16C2Tx
HT16C2Tx
20SSOP
20SSOP
D1
D1
D2
D2
D3
D3
D4
D4
D5
D5
D6
A6
A6
A5
A5
A4
A4
A3
A3
A2
A2
A1
D6
D7
D7
XOUT
XOUT
XIN
XIN
DOUT
DOUT
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
PAOUT
8-Address
6-Data
8-Address
6-Data
20
1
20
19
21
19
18
32
18
17
43
17
4
16
5
16
15
65
15
14
76
14
7
13
8
13
12
98
12
9
11
10
11
10
HT16E2Tx
HT16E2Tx
20SSOP
20SSOP
A7
A7
D0
D0
D1
D1
D2
D2
D3
D3
D4
A6
A6
A5
A5
A4
A4
A3
A3
A2
A2
A1
D4
D5
D5
XOUT
XOUT
XIN
XIN
DOUT
DOUT
VDD
VSS
VSS
PAOUT
A1
A0
A0
VDD
PAOUT
10-Address
4-Data
10-Address
4-Data
20
1
20
19
21
19
18
32
18
17
43
17
4
16
5
16
15
65
15
14
76
14
7
13
8
13
12
98
12
9
11
10
11
10
HT16G2Tx
HT16G2Tx
20SSOP
20SSOP
A7
A7
A8
A8
A9
A9
D0
D0
D1
D1
D2
D2
D3
D3
XOUT
XOUT
XIN
XIN
DOUT
DOUT
Pin Description
Pin Name
VDD
VSS
AX
DX
B0
B1
DOUT
PAOUT
XIN
XOUT
Type
—
—
I
I
I
I
O
O
I
O
Positive powe½ s½ppl½.
Negative powe½ s½ppl½.
DIP switch inp½t
Inte½nal p½ll high p½ovided
P½sh b½tton inp½t and t½ansmission enable - active Low
Can be exte½nall½ set to V
DD
o½ left open
Compo½nd pin of pin16 and pin19 fo½ HT1½x½Tx onl½
Ex. In HT1½C½Tx½ if B0 is p½lled low½ that means D5 and D½ a½e p½lled low togethe½.
Compo½nd pin of pin 16 and pin 17 fo½ HT1½x½T onl½
Encode½ data o½tp½t
RF t½ansmit Signal
C½½stal pin – f½eq½enc½ is RF ca½½ie½ f½eq½enc½ divided b½ 3½
e.g: fo½ 315MHz RF ca½½ie½ a 9.½4375MHz c½½stal sho½ld be selected
Description
Rev. 1.00
3
½an½a½½ ½½½ ½011
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