MC145026 MC145027 MC145028
ENCODER AND DECODER PAIRS
CMOS
These devices are designed to be used as encoder/decoder pairs in
remote control application.
The MC145026 encodes nine lines of information and serially send this
information upon receipt of a transmit enable signal.The nine lines may be
encoded with trinary data (low, high, or open) The words are transmitted
twice per encoding sequence to increase security.
The 145027 decoder receives the serial stream and interprets five of
the trinary digits as an adress code.Thus, 243 adresses are possible. If
binary data is used at the encoder, 32 adresses are possible. The remaining
serial information is interpreted as four bits of binary data. The valid
transmission (VT) output goes high on the MC145027 when two conditions are
met. First,two adresses must be consecutively received (in one encoding
sequence) whitch both match the local adress. Second, the 4 bits of data
must match the last valid data receivered. The active VT indicates that the
information at the Data ouput pins has been updated.
The MC145028 decoder treats all nine trinary digits as an address
which allows 19683 codes.If binary data is encoded, 512 codes are possible.
The VT output goes high on the MC145028 when two adresses are consecutively
received (in one encoding sequence) whitch both match the local asress.
FEATURES
- Operating Temperature Range: -40...+85C
- Very Low Standby Current: 300 nA max @ 25C
- Interface with RF, Ultrasonic, or Infrared Modulator and Demodulators
- RC Oscillator, No Crystal Required
- High External Component Tolerance; Can Used 5% Components
- Internal Power-On Reset Forces all Decoder Output Low
- Operating Voltage Rang: MC145026 2,3...18V
MC145027,MC145028 4,5...18V
- Low Voltage Versin Available:
SC41343 2,8...10V Version of the MC145027
SC41344 2,8...10V Version of the MC145028
MAXIMUM RATING (Voltage reference to Vcc)
DC Supply Voltage (except SC41343, SC413440) -0,5...+18V
DC Supply Voltage (SC41343, SC41344 only) -0,5...+10V
DC Input Voltage -0,5 to Vdd+0,5V
DC Output Voltage -0,5 to Vdd+0,5V
DC Input Current, per pin -+10mA
DC Output Current, per pin -+10mA
Power Dissipation, per Package 500mW
ELECTRICAL CHARACTERISTICS
MC145026 MC145027 MC145028
Min Max
Low-Level Output Voltag (Vin=Vdd or 0) - 0,05V
High-Level Output Voltage (Vin=0 or Vdd) Vdd=5V 4,95V -
10V 9,95V -
15V 14,95V -
Low-Level Input Voltage (Vout=4,5 or 0,5V) Vdd=5V - 1,5V
(Vout=9 or 1V) 10V - 3,0V
(Vout=13,5 or 1,5V) 15V - 4,0V
Hight Level Input Voltage (Vout=0,5 or 4,5V) Vdd=5V 3,5V -
(Vout=1 or 9V) 10V 7,0V -
(Vout=1,5 or 13,5V) 15V 11,0V -
High Level Output Current (Vout=2,5V) Vdd=5V -2,1 mA -
(Vout=4,6V) 5V -0,44mA -
(Vout=9,5V) 10V -1,1 mA -
(Vout=13,5V) 15V -3,0 mA -
Low Level Output Current (Vout=0,4V) Vdd=5V 0,44mA -
(Vout=0,5V) 10V 1,1 mA -
(Vout=1,5V) 15V 3,0 mA -
Input Current Vdd=5V 3,0mA 11mA
(MC145026, Pull-Up Device) 10V 16mA 60mA
15V 35mA 120mA
Input Current Vdd=15V -+0,3mkA -
Rs(MC145026), Din(MC145027,MC1435028)
Input Current
A1-A5,A6/D6-A9/D9(MC145026) Vdd=5V -+110 mkA -
A1-A5(MC145027) 10V -+500 mkA -
A1-A9(MC145028) 15V -+1000mkA -
Input Capacitance (Vin=0) - - 7,5pF
Quiescent Current - MC145026 Vdd=5V 0,1mkA -
10V 0,2mkA -
15V 0,3mkA -
Quiescent Current - MC145027, MC145028 Vdd=5V 50 mkA -
10V 100mkA -
15V 150mkA -
Dinamic Supply Current-MC145026 (Fc=20kHz) Vdd=5V 200mkA -
10V 400mkA -
15V 600mkA -
Dinamic Supply Current-MC145027,VC145028 Vdd=5V 400mkA -
(Fc=20kHz) 10V 800mkA -
15V 1200mkA -