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ML145027EP Просмотр технического описания (PDF) - Unspecified

Номер в каталогеML145027EP ETC
Unspecified 
Компоненты ОписаниеEncoder and Decoder Pairs CMOS


ML145027EP Datasheet PDF : 19 Pages
First Prev 11 12 13 14 15 16 17 18 19
ML145026, ML145027, ML145028
LANSDALE Semiconductor, Inc.
SEND
MC 14011UB
SELECT FOR
200 mA TO 300 mA
MLED81
USE OF 2 MLED81s
IS OPTIONAL
10 k
MPSA13
OR
MPSW13
TE
Dout
ML 145026
RS
CTC
RTC
9
1000 pF
MC 14011UB
220 k
SWITCHES
220 k
100 kFOR APPROX. 4 kHz
47 kFOR APPROX. 9 kHz
0.01 µF
ADJUST/SELECT FOR
f = 50 kHz (APPROX. 100 k)
F igure 18. IR E D Trans mitter Us ing R C Os c illator to G enerate C arrier F requenc y
V+
1M
X1
MC 14011UB
MC 14024
CLK
Q3
RESET
50 kHZ TO
DRIVER
TRANSISTOR
X1 = 400 kHz CERAMIC RESONATOR
PANASONIC EFD–A400K04B
OR EQUIVALENT
V+
MC 14011UB
470 pF
470 pF
Dout
FROM ML145026
F igure 19. Us ing a C eramic R es onator to G enerate C arrier F requenc y
Page 16 of 19
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[LANSDALE]

Legacy Device:Motorola/Freescale MC145026, MC145027, MC145028
These devices are designed to be used as encoder/decoder pairs in remote control applications.
The ML145026 encodes nine lines of information and serially sends this information upon receipt of a transmit enable (TE) signal. The nine lines may be encoded with trinary data (low, high, or open) or binary data (low or high). The words are transmitted twice per encoding sequence to
increase security.
The ML145027 decoder receives the serial stream and interprets five of the trinary digits as an address code. Thus, 243 addresses are possible. If binary data is used at the encoder, 32 addresses are possible. The remaining serial information is interpreted as four bits of binary data. The valid transmission (VT) output goes high on the ML145027 when two conditions are met. First, two addresses must be consecutively received (in one encoding sequence) which both match the local address. Second, the 4 bits of data must match the last valid data received. The active VT indicates that the information at the Data output pins has been updated.
The ML145028 decoder treats all nine trinary digits as an address which allows 19,683 codes. If binary data is encoded, 512 codes are possible. The VT output goes high on the ML145028 when two addresses are consecutively received (in one encoding sequence) which both match the local
address.

• Operating Temperature Range: TA= – 40 to + 85°C
• Very–Low Standby Current for the Encoder: 300 nA Maximum @ 25°C
• Interfaces with RF, Ultrasonic, or Infrared Modulators and Demodulators
• RC Oscillator, No Crystal Required
• High External Component Tolerance; Can Use ± 5% Components
• Internal Power–On Reset Forces All Decoder Outputs Low
• Operating Voltage Range: ML145026 = 2.5 to 18 V*
                                     ML145027, ML145028 = 4.5 to 18 V
• For Infrared Applications, See Application Note AN1016/D

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