D.C. Characteristics

Symbol

Parameter

Test Conditions

Min.

Typ.

Max.

Unit

Conditions

Operating Voltage

¾¾

2.4

¾

5V

Standby Current

5V

OSC stop amp off

¾

0.1

1

mA

5V

OSC stop amp on

¾

10

20

mA

Operating Current

5V

No load

¾

1.5

2

mA

AUD output current

5V

Transistor B load

3

5

¾

mA

VT Output Source Current

5V

-2

-3

¾

mA

VT Output Sink Current

5V

23

¾

mA

High Input Voltage

5V

¾

3.5

¾

5V

Low Input Voltage

5V

¾

0

¾

1V

Oscillator Frequency

5V

ROSC=820k

W¾

190

¾

kHz

HT12M

Rev. 1.00

3

March 25, 2002

Functional Description

Built-in inverter amp

Trigger mode

Single tone has 4 second total length, dual tone has 1

second total length.

A M P

D a t a O u t

R . I n p u t

V T

O n e - s h o t

O n e - s h o t

T w i c e

W e s t m i n s t e s

t u r e

1 s e c

3 s e c

3 . 2 s e c

The Ding-Dong sound: is determined by the D8~D11 pins on the HT12E. While the Re-trigger/Non-trigger function is

determined by the D11 pin on the HT12E.

D11

D10

D9

D8

Sound

Notes

1

000

Me

1

2

0

0

1

Me Do

2

3

010

Me Do

¾ Me Do

Repeat

4

0

1

1

Me/Do

Single tone

5

100

Me Do Re So

¾ So Re Me Do

Westminster tune

6

1

0

1

Me/Do Do/So

Double tone

7

1

1

0

So Re Me Do

4

8

111

Me/Do Do/So

¾ Me/Do Do/So

Dual Tone-repeat

Section time: 0.8secretary

´ 2 = 1.6sec