P

AC

MAINS

N

LOAD

C1

T1

L1

C2

R1

R2

A

B

R6

R9

C3

D1

5

6

7

8

4

3

2

1

R5

C3

C4

OUT

CAP SYNC

+

LS7338

R4

R3

SEE NOTE 1

FIGURE 5. A TYPICAL LIGHT SWITCH APPLICATION

G

MT2

MT1

Z1

-

ELECTRONIC

EXTENSION

(Figure 6)

EXTN

P

C7

SEE NOTE

3

SEE NOTE 2

R10

SENSOR

PLATE

R8

C6

R7

-

+

NOTES:

1. Use Connection A when Neutral is not available. Use Connection B when Neutral is available.

2. C7 is used only with Electronic Extension. R10 is used only with Mechanical Switch.

3. Connection between Pin 2 and Pin 3 is removed when SLAVE input is used.

4. See Table 2 for Component Functional Description

115VAC

220VAC

115VAC

220VAC

(1) R1

270

Ω, 1W

1k

Ω, 2W

(1) C2

0.33µF,200V

0.22µF,400V

(2) R1

82

Ω

82

Ω

(2) C2

0.22µF,200V

0.1µF,400V

R2

1.5M

Ω

1.5M

Ω

C3

47µF

47µF

R3

2.7M

Ω

4.7M

Ω

C4

470pF

470pF

R4

2.7M

Ω

4.7M

Ω

C5

.047µF

.047µF

(3) R5

1M

Ω to 5MΩ 1MΩ to 5MΩ

C6

(5)

(5)

R6

100

Ω

100

Ω

C7

0.1µF,200V

0.1µF,400V

R7

(4)

(4)

Z1

15V, 1/2W

15V, 1/2W

R8

(4)

(4)

D1

1N4148

1N4148

R9

1.5M

Ω

1.5M

Ω

L1

100µH

200µH

R10

150k

Ω

150k

Ω

(6) T1

Q4008L4

Q5004L4

C1

0.15µF, 200V 0.15µF, 400V

(1) Connection A

(2) Connection B

(3) Select for desired touch sensitivity

(4) 100k

Ω ≤ (R7 + R8) ≤ 10MΩ

(5) (R7 + R8)C6

≥ 5ms

(6) Typical

All Resistors 1/4W, all Capacitors 25V unless otherwise specified

TABLE 2 . FIGURE 5 COMPONENT FUNCTIONAL DESCRIPTION

COMPONENTS

FUNCTIONAL DESCRIPTION

Z1, D1, R1, C2, C3

DC Power Supply.

R2, C4

Current limit and filter AC for SYNC input.

C1, L1

RFI filtering for AC Mains.

C5

PLL filter capacitor.

R3, R4, R5

Network sets the Touch Sensitivity

for the SENSE input.

R6

Current limiting and isolation between

IC output and Triac Gate.

R7, R8, C6

Oscillator R-C network.

Potentiometer R6 required only if providing

user adjustment of Time-out, TD1.

R9, C7

Filter for the Electronic Extension

R10

Current limiting resistor for

the Mechanical Switch Extension.