HT12E(2003) 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT12E Datasheet PDF : 14 Pages
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HT12A/HT12E
Pin Description
Pin Name I/O
Internal
Connection
A0~A7
I
CMOS IN Pull-high
(HT12A)
Description
Input pins for address A0~A7 setting
These pins can be externally set to VSS or left open
NMOS TRANSMISSION
GATE PROTECTION
DIODE (HT12E)
AD8~AD11
I
NMOS TRANSMISSION
GATE PROTECTION
DIODE (HT12E)
Input pins for address/data AD8~AD11 setting
These pins can be externally set to VSS or left open
Input pins for data D8~D11 setting and transmission enable, active
D8~D11
I
CMOS IN Pull-high low
These pins should be externally set to VSS or left open (see Note)
DOUT
O
CMOS OUT
Encoder data serial transmission output
Latch/Momentary transmission format selection pin:
L/M
I
CMOS IN Pull-high Latch: Floating or VDD
Momentary: VSS
TE
I
CMOS IN Pull-high Transmission enable, active low (see Note)
OSC1
I
OSCILLATOR 1
Oscillator input pin
OSC2
O
OSCILLATOR 1
Oscillator output pin
X1
I
OSCILLATOR 2
455kHz resonator oscillator input
X2
O
OSCILLATOR 2
455kHz resonator oscillator output
VSS
I
¾
Negative power supply, ground
VDD
I
¾
Positive power supply
Note: D8~D11 are all data input and transmission enable pins of the HT12A.
TE is a transmission enable pin of the HT12E.
Approximate Internal Connections
NM OS
T R A N S M IS S IO N
G ATE
C M O S IN
P u ll- h ig h
CM OS OUT
O S C IL L A T O R 1
EN
O SC1
O SC2
O S C IL L A T O R 2
X1
X2
N M O S T R A N S M IS S IO N G A T E
P R O T E C T IO N D IO D E
V DD
Rev. 1.10
3
January 24, 2003
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