HT62104 Datasheet, PDF (9/14 Pages) Holtek Semiconductor Inc – Infrared Remote Encoder

HT62104
Application Circuit
Single-point
connection for VDD
3V
Single-point
connection for GND
R1 1W
VDD
R2 10W
C1
C2
K1
K2
C1
K3
220mF
C2
0.1mF
K4
K5
K6
K7
VSS
K8
VSS1
VSS2
Figure 1 (See Note)
1
C1
2
C2
3
K1
4
K2
5
K3
6
K4
7
K5
8
VSS
16
VDD
15
DOUT
14
LED
13
VDD1
12
VSS1
11
K8
10
K7
9
K6
HT62104
3V
330mF
1W
C1
C2
1
C1
2
16
VDD
15
IR LED
IR333C-A(Q)
C2 DOUT
K1
3
14
K1
LED
LED
K2
4
K2
13
VDD1
1mF
K3
5
12
K3
VSS1
K4
6
11
K8
K4
K8
K5
7
10
K7
K5
K7
8
9
K6
VSS
K6
HT62104
Figure 2
Note: 1. V_DD1 provides power for the IR_LED; V_DD provides power for the IC logic circuits. The two power
supplies, the C1 (220mF) positive terminal and the positive terminal of the battery must have a single-point
connection.
2. Before the V_DD power supply is connected to the IC VDD pin, a capacitor C2 (0.1mF) must first be
connected close to the IC.
3. VSS1 is GND for the DOUT driver; VSS2 is GND for the LED driver; VSS is GND for the IC logic
circuits. The three GNDs, the negative terminal of C1 (220mF) and the negative terminal of the battery
must have a single-point connection.
4. If high current drive conditions for IR_LED result in instability on VDD (noise), it is recommend to add a
resistor R2 to stabilise VDD and VDD1 pins.
5. The DOUT and KEY tracks should be kept apart by a distance of 30mil or more.
6. During PCB manufacture, the DOUT, VDD, VSS, VSS1, and VSS2 tracks should not by made using
carbon tracks.
Rev. 1.00
9
May 07, 2012