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參數(shù)資料
| 型號： | 145026P |
| 廠商： | Motorola, Inc. |
| 英文描述： | Encoder and Decoder Pairs |
| 中文描述： | 編碼器和解碼器雙 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 233K |
| 代理商： | 145026P |
MC145026
MC145027
MC145028
SC41343
SC41344
MOTOROLA
1
CMOS
These devices are designed to be used as encoder/decoder pairs in remote
control applications.
The MC145026 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 MC145027 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 MC145027 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 MC145028 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 MC145028 when two addresses are consecutively
received (in one encoding sequence) which both match the local address.
Operating Temperature Range: – 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: MC145026 = 2.5 to 18 V
*
MC145027, MC145028 = 4.5 to 18 V
Low–Voltage Versions Available:
SC41343 = 2.8 to 10 V Version of the MC145027
SC41344 = 2.8 to 10 V Version of the MC145028
For Infrared Applications, See Application Note AN1016/D
PIN ASSIGNMENTS
MC145026
ENCODER
MC145028/SC41344
DECODERS
MC145027/SC41343
DECODERS
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
CTC
RS
RTC
TE
Dout
VDD
A8/D8
A9/D9
A4
A3
A2
A1
VSS
A7/D7
A6/D6
A5
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
D9
D8
D7
D6
VDD
Din
R2/C2
VT
A4
A3
A2
A1
VSS
C1
R1
A5
13
14
15
16
9
10
11
12
5
4
3
2
1
8
7
6
A9
A8
A7
A6
VDD
Din
R2/C2
VT
A4
A3
A2
A1
VSS
C1
R1
A5
* All MC145026 devices manufactured after date code 9314 or 314 are guaranteed over this wider voltage range. All previous designs using the
low–voltage SC41342 should convert to the MC145026, which is a drop–in replacement. The SC41342 part number has been discontinued.
Order this document
by MC145026/D
SEMICONDUCTOR TECHNICAL DATA
P SUFFIX
PLASTIC DIP
CASE 648
ORDERING INFORMATION
MC145026P
MC145026D
Plastic DIP
SOG Package
MC145027P, SC41343P
MC145027DW, SC41343DW
Plastic DIP
SOG Package
MC145028P, SC41344P
MC145028DW, SC41344DW
Plastic DIP
SOG Package
D SUFFIX
SOG PACKAGE
CASE 751B
DW SUFFIX
SOG PACKAGE
CASE 751G
16
1
16
1
16
1
REV 2
1/98
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