Holtek Semiconductor Inc HT614, HT604L, HT692 Datasheet
Features
Operating voltage: 2.4V~12V
·
Low power and high noise immunity CMOS
·
technology
Low standby current
·
Capable of decoding 18 bits of information
·
Pairs with Holtek¢s318series of encoders
·
9~10 address pins
·
2~8 data pins
·
Trinary address setting
·
Applications
Burglar alarm system
·
Smoke and fire alarm system
·
Garage door controllers
·
Car door controllers
·
General Description
The 318decoders are a series of CMOS LSIs for
remote control system applications. They are
paired with the 3
proper operation, a pair of encoder/decoder pair
with the same number of address and data format should be selected (refer to the encoder/decoder cross reference tables).
18
The 3
and data from that series of encoders that are
transmitted by a carrier using an RF or an IR
transmission medium. It then compares the serial input data twice continuously with its local
address. If no errors or unmatched codes are
series of decoders receive serial address
18
series of encoders. For
HT604L/614/692
318Series of Decoders
Two times of receiving check
·
Built-in oscillator needs only a 5% resistor
·
Valid transmission indicator
·
Easy interface with an RF or an infrared
·
transmission medium
Minimal external components
·
Package information: refer to Selection
·
Table
Car alarm system
·
Security system
·
Cordless telephones
·
Other remote control systems
·
encountered, the input data codes are decoded
and then transferred to the output pins. The VT
pin also goes high to indicate a valid transmission.
18
The 3
of information that consists of N bits of address
and 18-N bits of data. To meet various applications they are arranged to provide a number of
data pins whose range is from 0 to 8 and an address pin whose range is from 8 to 18. In addition, the 3
combinations of address/data number in differ
ent packages.
decoders are capable of decoding 18 bits
18
decoders provide various
-
1 April 24, 2000
Selection Table
HT604L/614/692
Function
Part No. No. Type
Address
No.
HT604L 10 4 L
HT614 10 4 M
HT692 10 2 M
Data
VT Oscillator Trigger Package
RC oscillator
Ö
RC oscillator
Ö
RC oscillator
Ö
Note: Data type: M stands for momentary type data output.
L stands for latch type data output.
VT can be used as a momentary data output.
Block Diagram
OSC1OSC2
DIN
O scillator
B u ffe r
Sync. D etector
D ivider
D a ta D e te c to r
C om parator C om parator
D a ta S h ift
R egister
Latch C ircuit
C ontrol Logic
DIN active ²Hi²
DIN active ²Hi²
DIN active ²Hi²
Data
20 DIP/SOP
20 DIP/SOP
18 DIP
VT
Address
Buffer Transm issio n G ate C ircuit
VDD VSS
Note: The address/datapins are available in various combinations (refer to the address/data table).
2 April 24, 2000
Pin Assignment
Latch series Momentary series
HT604L/614/692
10-A ddress
4 -D a t a
1
A11
2
D12
3
D13
4
D14
5
D15
VT
6
DIN
7
OSC2
8
9
OSC1
10
VSS
H T 604L
20 D IP/S O P
10-A ddress
4 -D a t a
A11
20
VDD
19
A9
18
A8
17
A7
16
A6
A4
15
A3
14
A2
13
12
A1
11
A0
OSC2
OSC1
D12
D13
D14
D15
VT
DIN
VSS
1
2
3
4
5
6
7
8
9
10
VDD
20
19
A9
18
A8
17
A7
16
A6
A4
15
A3
14
A2
13
A1
12
A0
11
H T 614
20 DIP/SO P
10-A ddress
2 -D a t a
Pin Description
Pin Name I/O
A0~A12 I
D10~D17 O CMOS OUT Output data pins
DIN I CMOS IN Serial data input pin
VT O CMOS OUT Valid transmission, active high
OSC1 I OSCILLATOR Oscillator input pin
OSC2 O OSCILLATOR Oscillator output pin
VSS
VDD
¾¾
¾¾
Internal
Connection
TRANSMISSION
GATE
Description
Input pins for address A0~A12 setting
They can be externally set to VDD, VSS or left open.
Negative power supply, ground
Positive power supply
A11
A12
D14
D15
VT
DIN
OSC2
OSC1
VSS
1
2
3
4
5
6
7
8
9
HT692
18 D IP
18
VDD
17
A9
16
A8
15
A7
14
A6
A3
13
12
A2
A1
11
10
A0
Approximate internal connections
TRANSM ISSION
GATE
CMOS OUT OSCILLATOR
CMOS IN
OSC1
EN
OSC2
3 April 24, 2000
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