Operating voltage: 3V~5V power consumption high noise immunity CMOS te

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Operating voltage: 3V~5V power consumption high noise immunity CMOS te

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HT6280 Alarm Decoder
Operating voltage: 3V~5V power consumption high noise immunity CMOS technology Built-in oscillator needs only resistor trinary address codes decoder control data outputs
local alarm trigger inputs: TRIG, AL+, ALValid transmission indicator (LED) disarms whole alarm system Easy interface with medium
General Description
HT6280 18-bit decoder CMOS designed remote control alarm system. When complemented triggered HT600/HT640/HT680 DATA triggered HT6187/HT6207/HT6247 encoder from range series encoders, complete remote alarm system formed. details encoders found relevant databook encoder section. After receiving bits information from encoder HT6280 interprets first bits address last bits control signal data. these received bits address matches that locally address then data bits latched control function executed. Three types control function incorporated device, these arm/disarm, panic power on/off. HT6280 also provides momentary data outputs other user defined special purposes.
HT6280
Assignment
HT6280
Block Diagram
Description
HT6280 Pins
6~17 18~20
Name
OSC2 A0~A11 D15~D17
Internal Connection
OSCILLATOR CMOS
Description
Oscillator output Serial data input connection
TRANSMISSION A0~A11 address inputs GATE They VDD, VSS, floating. CMOS D15~D17 momentary data outputs from D15~ encoder, external control ON/OFF output external control Toggle outputs ON/OFF triggered encoder
ON/OFF
CMOS
HT6280
25,26
Name
RESET TEST LOCK UNLOCK FLASH SIREN TRIG ALAL+
Internal Connection
CMOS CMOS CMOS Pull-Low CMOS NMOS CMOS CMOS CMOS CMOS Pull-High CMOS Pull-High CMOS Pull-Low CMOS CMOS Pull-High CMOS Pull-High OSCILLATOR System reset
Description
testing only active high signal disarms alarm system connection Positive power supply Lock signal output control external lock/unlock, active high indicator arm/disarm, alarm, panic Unlock signal output control external lock/unlock, active high Flash output control external lamp circuit, active high Alarm output control external siren circuit, active high Alarm trigger input state, active high Alarm trigger input state, active Alarm trigger input state, active high state output, active high This toggled encoder lamp flash selection during alarm: VSS: Lamp flash Open: Lamp flash disabled Negative power supply (GND) Chirp sound selection during change arm/disarm states: VSS: Chirp Open: Chirp disabled Oscillator input
OPT2
OPT1
OSC1
HT6280
Approximate internal connection circuits
Absolute Maximum Ratings*
Supply Voltage -0.3V 5.5V Input Voltage. VSS-0.3 VDD+0.3V Storage Temperature. -50°C 125°C Operating Temperature. -20°C 75°C
*Note: Stresses above those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only. Functional operation this device these other conditions above those indicated operational sections this specification implied exposure absolute maximum rating conditions extened periods affect device reliability.
Electrical Characteristics
Symbol
ISTB IOUT1 IOUT2
(Ta=25°C)
Parameter
Supply Voltage Standby Current Operating Current Pull-High Resistance Pull-Low Resistance Output Current (D15~D17) Output Current (ON/OFF) Source Sink Source Sink
Test Conditions
Conditions
Oscillator stops load FOSC=100kHz VIN=0V VIN=5V VOUT=0.9VDD VOUT=0.1VDD VOUT=0.9VDD VOUT=0.1VDD
Min.
-0.3 -0.7
Typ.
-0.6 -1.2
Max.
Unit
HT6280
Symbol
IOUT3 IOUT4 IOUT5 ILED FOSC
Parameter
Output Current (LOCK, UNLOCK) Output Current (FLASH, SIREN) Output Current (ARM) Output Current Input Voltage Input Voltage System Frequency Source Sink Source Sink Source Sink Sink
Test Conditions
Conditions
VOUT=0.9VDD VOUT=0.1VDD VOUT=0.9VDD VOUT=0.1VDD VOUT=0.9VDD VOUT=0.1VDD VOUT=0.1VDD ROSC=200k
Min.
-1.5 0.8VDD
Typ.
Max.
0.2VDD
Unit
Functional Description
Operation Arm/disarm control
After power HT6280 receives data word from series encoders. interprets first bits code address last bits data. decoder then compares received address with local address code twice successively. received address code match local address code, data bits decoded output pins.
Power initial
HT6280 state inital power
signal toggles arm/disarm condition HT6280. decoder state signal been received (the signal encoder) lights flash twice continuously, chirp sounds twice successively alarm system enters disarm state. Similarly, arm/disarm signal received again lights also flash once, chirp sounds once, alarm system enters state. timing arm/disarm shown below.
Fig.1 panic/alarm trigger state
HT6280
Alarm triggering (AL+, AL-, TRIG)
With alarm state, three signals AL+, AL-, TRIG trigger alarm. Triggering alarm causes lights flash rate (OPT2=VSS) siren sound. trigger removed within cycles, flashing lights siren cease that cycle; otherwise they complete cycles. cycle lasts
seconds seconds off. During alarm trigger flashes rate then continues even trigger removed. Activating (the alarm reset line) will turn addition lights siren. AL+, TRIG lines disabled disarm state, panic function still enabled. timing alarm trigger shown below.
Fig.2 Alarm trigger (AL+, AL-, TRIG) state
Panic control
panic signal (D13) been received whether disarm state, siren sounds flash lights lasts
cycle until activated. will flash quickly then turn activated whether siren working stop state. timing shown below.
Fig.3 Panic trigger state
HT6280
Alarm output (SIREN) Encoder/Decoder reference table
trigger (AL+, AL-, TRIG) been removed within period cycles, SIREN will stop that cycle. Otherwise will continue complete another period cycles. timing cycle about seconds seconds off. alarm state quitted arm/disarm (D12) trigger. panic turns (active high) whether disarm state, SIREN will output cycle seconds seconds off). alarm state ferminated active high signal. SIREN outputs 80ms pulse when HT6280 enters state. then outputs pulses (Pulse width=80ms Pulse space=240ms) when decoder enters disarm state arm/disarm (D12) trigger. This function inhibited floating OPT1.
LOCK/UNLOCK output
Encoder Data
input
Decoder Function
Arm/Disarm toggle Panic control ON/OFF toggle Momentary data output Momentary data output Momentary data output
After active high input activated, alarm system enters disarm state, arm/disarm (D12), panic, other control signals fail received, stops flashing.
output
LOCK UNLOCK pins activated initial power LOCK outputs 2-second pulse when HT6280 enters state. UNLOCK pin, other hand, outputs 2-second pulse when decoder enters disarm state. LOCK UNLOCK pins cannot operate simultaneously LOCK takes priority over UNLOCK. timing shown Fig.1.
FLASH output
outputs "Hi" signal when HT6280 operating state. Otherwise outputs "Lo" signal.
ON/OFF output
ON/OFF provides external toggle on/off control when HT6280 responds signal from encoder. ON/OFF timing shown below.
FLASH outputs pulse when HT6280 enters state pulses when decoder enters disarm state. After siren operates, light will flash rate until siren ceases. This function inhibited floating OPT2.
output
ON/OFF timing
D15~D17 data output
high impedance initial power state flashes rate. alarm panic triggered flashes rate until activated. timing shown Fig.1.
D15~D17 HT6280 momentary type data outputs which follow D15~D17 encoder. These lines user-defined control use. timing shown next.
HT6280
Flowchart
D15~D17 timing
HT6280
Oscillator frequency supply voltage
recommended oscillator frequency FOSCD (decoder) FOSCE (encoder).
HT6280
Application Circuits
40-pin package
Note: Typical infrared diode: EL-1L2 (KODENSHI CORP.) Typical transmitter: JR-220 (JUWA CORP.) Typical infrared receiver: PIC-12043T/PIC-12043S (KODESHI CORP.) LTM9052 (LITEON CORP.) Typical receiver: JR-200 (JUWA CORP.)

Operating voltage: 3V~5V power consumption high noise immunity CMOS te

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