HT16x2Tx/HT12x2Tx
216/212 RF Encoder
Operation Flowchart
Power on
Standby mode
No
Transmission
enabled?
YES
4 data words
transmitted
No
Transmission
still enabled
YES
4 data words
transmitted
continuously
Application Circuit
2
U2 LDO
3
U1
HT7136-1
1
20
19
18
17
16
B1
14
13
12
11
A6
A7
D0
C8
0.1uF
SW-DIP
SW-DIP
S7
S6
S5
S4
S3
S2
S1
S0
1
2
A5
SW-DIP
SW-TACT
SW-TACT
SW-TACT
SW-TACT
SW-TACT
SW-TACT
S8
3
A4
D1
BT1(12V)
BATTERY
SW-DIP
S9
BT2(3V)
BATTERY
4
A3
D2
SW-DIP
S10
S11
S12
S13
5
A2
D3
SW-DIP
6
A1
B0
SW-DIP
7
A0
B1
SW-DIP
R3
8
VDD
VDD
VSS
XOUT
XIN
DOUT
X1
9
2
1
L1
150nH
R1
10
PAOUT
C1
C2
C7
100pF
Trace ANT
HT12E2T3
D1
LED
C5
C3
C4
C6
Note: 1. When using a 6~12V battery, an HT7136 LDO should be added
2. 315MHz RF uses a 9.84375MHz Crystal
433MHz RF uses a 13.56MHz Crystal
Rev. 1.00
7
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HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
