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부품번호 ML145028 기능
기능 (ML145026 - ML145028) Encoder and Decoder Pairs
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ML145028 데이터시트, 핀배열, 회로
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ML145026
ML145027
ML145028
Encoder and Decoder Pairs
CMOS
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 trans-
mission (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 consecu-
tively 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
16
1
16
1
P DIP 16 = EP
PLASTIC DIP
CASE 648
SO 16 = -5P
SOG PACKAGE
CASE 751B
16
1
SO 16W = -5P
SOG PACKAGE
CASE 751G
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
MOTOROLA
LANSDALE
P DIP 16
SO 16
P DIP 16
SO 16
P DIP 16
SO 16
MC145026P
MC145026D
MC145027P
MC145027DW
MC145028P
MC145028DW
ML145026EP
ML145026-5P
ML145027EP
ML145027-5P
ML145028EP
ML145028-5P
Note: Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from ML to MLE.
ML145026
ENCODER
A1
A2
A3
A4
A5
A6/D6
A7/D7
1
2
3
4
5
6
7
16 VDD
15 Dout
14 TE
13 RTC
12 CTC
11 RS
10 A9/D9
VSS 8
9 A8/D8
PIN ASSIGNMENTS
ML145027
DECODERS
A1 1
A2 2
16 VDD
15 D6
A3 3
A4 4
14 D7
13 D8
A5 5
R1 6
C1 7
VSS 8
12 D9
11 VT
10 R2/C2
9 Din
ML145028
DECODERS
A1 1
A2 2
16 VDD
15 A6
A3 3
A4 4
14 A7
13 A8
A5 5
12 A9
R1 6
C1 7
VSS 8
11 VT
10 R2/C2
9 Din
Page 1 of 19
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ML145028 pdf, 반도체, 판매, 대치품
ML145026, ML145027, ML145028
www.DataSheet4U.com
LANSDALE Semiconductor, Inc.
ELECTRICAL CHARACTERISTICS — ML145026 *, ML145027, and ML145028 (Voltage Referenced to VSS)
Guaranteed Limit
Symbol
Characteristic
VDD
V
– 40°C
Min Max
25°C
Min Max
85°C
Min Max
VOL Low–Level Output Voltage
(Vin = VDD or 0) 5.0 — 0.05 — 0.05 — 0.05
10 — 0.05 — 0.05 — 0.05
15 — 0.05 — 0.05 — 0.05
VOH High–Level Output Voltage
(Vin = 0 or VDD) 5.0 4.95 — 4.95 — 4.95 —
10 9.95 — 9.95 — 9.95 —
15 14.95 — 14.95 — 14.95 —
VIL Low–Level Input Voltage
(Vout = 4.5 or 0.5 V) 5.0
1.5
1.5
1.5
(Vout = 9.0 or 1.0 V) 10 — 3.0 — 3.0 — 3.0
(Vout = 13.5 or 1.5 V) 15 — 4.0 — 4.0 — 4.0
VIH High–Level Input Voltage
(Vout = 0.5 or 4.5 V) 5.0
3.5
3.5
3.5
(Vout = 1.0 or 9.0 V) 10
7.0
7.0
7.0
(Vout = 1.5 or 13.5 V) 15
11
11
11
IOH High–Level Output Current
(Vout = 2.5 V) 5.0 – 2.5 — – 2.1 — – 1.7 —
(Vout = 4.6 V) 5.0 – 0.52 — – 0.44 — – 0.36 —
(Vout = 9.5 V) 10 – 1.3 — – 1.1 — – 0.9 —
(Vout = 13.5 V) 15 – 3.6 — – 3.0 — – 2.4 —
IOL Low–Level Output Current
(Vout = 0.4 V) 5.0 0.52 — 0.44 — 0.36 —
(Vout = 0.5 V) 10
1.3
1.1
0.9
(Vout = 1.5 V) 15
3.6
3.0
2.4
Iin Input Current — TE
(ML145026, Pull–Up Device)
5.0 — — 3.0 11 — —
10 — — 16 60 — —
15 — — 35 120 — —
Iin Input Current
RS (ML145026), Din (ML145027, ML145028)
Iin Input Current
A1 – A5, A6/D6 – A9/D9 (ML145026),
A1 – A5 (ML145027),
A1 – A9 (ML145028)
15 — ± 0.3 — ± 0.3 — ± 1.0
5.0 — — — ± 110 — —
10 — — — ± 500 — —
15 — — — ± 1000 — —
Cin Input Capacitance (Vin = 0)
IDD Quiescent Current — ML145026
— — — — 7.5 — —
5.0 — — — 0.1 — —
10 — — — 0.2 — —
15 — — — 0.3 — —
IDD Quiescent Current — ML145027, ML145028
5.0 — — — 50 — —
10 — — — 100 — —
15 — — — 150 — —
Idd Dynamic Supply Current — ML145026
(fc = 20 kHz)
5.0 — — — 200 — —
10 — — — 400 — —
15 — — — 600 — —
Idd Dynamic Supply Current — ML145027, ML145028 5.0
— 400 —
(fc = 20 kHz)
10 — — — 800 — —
15 — — — 1200 — —
* Also see next Electrical Characteristics table for 2.5 V specifications.
Unit
V
V
V
V
mA
mA
µA
µA
µA
pF
µA
µA
µA
µA
Page 4 of 19
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ML145028 전자부품, 판매, 대치품
ML145026, ML145027, ML145028
www.DataSheet4U.com
LANSDALE Semiconductor, Inc.
OPERATING CHARACTERISTICS
ML145026
The encoder serially transmits trinary data as defined by the
state of the A1 – A5 and A6/D6 – A9/D9 input pins. These
pins may be in either of three states (low, high, or open) allow-
ing 19,683 possible codes. The transmit sequence is initiated
by a low level on the TE input pin. Upon power–up, the
ML145026 can continuously transmit as long as TE remains
low (also, the device can transmit two–word sequences by
pulsing TE low). However, no ML145026 application should
be designed to rely upon the first data word transmitted imme-
diately after power–up because this word may be invalid.
Between the two data words, no signal is sent for three data
periods (see Figure 10).
Each transmitted trinary digit is encoded into pulses (see
Figure 11). A logic 0 (low) is encoded as two consecutive short
pulses, a logic 1 (high) as two consecutive long pulses, and an
open (high impedance) as a long pulse followed by a short
pulse. The input state is determined by using a weak“output”
device to try to force each input high then low. If only a high
state results from the two tests, the input is assumed to be hard
wired to VDD. If only a low state is obtained, the input is
assumed to be hardwired to VSS. If both a high and alow can
be forced at an input, an open is assumed and is encoded as
such. The “high” and “low” levels are 70% and 30% of the
supply voltage as shown in the Electrical Characteristics table.
The weak “output” device sinks/sources up to110 µA at a 5 V
supply level, 500 µA at 10 V, and 1 mA at 15 V.
The TE input has an internal pull–up device so that a simple
switch may be used to force the input low. While TE is high
and the second–word transmission has timed out, the encoder
is completely disabled, the oscillator is inhibited, and the cur-
rent drain is reduced to quiescent current. When TE is brought
low, the oscillator is started and the transmit sequence begins.
The inputs are then sequentially selected, and determinations
are made as to the input logic states. This information is serial-
ly transmitted via the Dout pin.
ML145027
This decoder receives the serial data from the encoder and
outputs the data, if it is valid. The transmitted data, consisting
of two identical words, is examined bit by bit during reception.
The first five trinary digits are assumed to be the address. If
the received address matches the local address, the next four
(data) bits are internally stored, but are not transferred to the
output data latch. As the second encoded word is received, the
address must again match. If a match occurs, the new data bits
are checked against the previously stored data bits. If the two
nibbles of data (four bits each) match, the data is transferred to
the output data latch by VT and remains until new data
replaces it. At the same time, the VT output pin is brought high
and remains high until an error is received or until no input
signal is received for four data periods (see Figure 10).
Although the address information may be encoded in tri-
nary, the data information must be either a 1 or 0. A trinary
(open) data line is decoded as a logic 1.
ML145028
This decoder operates in the same manner as the ML145027
except that nine address lines are used and no data output is
available. The VT output is used to indicate that a valid address
has been received. For transmission security, two identical
transmitted words must be consecutively received before a VT
output signal is issued.
The ML145028 allows 19,683 addresses when trinary levels
are used. 512 addresses are possible when binary levels are
used.
PIN DESCRIPTIONS
ML145026 ENCODER
A1 – A5, A6/D6 – A9/D9
Address, Address/Data Inputs (Pins 1 – 7, 9, and 10)
These address/data inputs are encoded and the data is sent
serially from the encoder via the Dout pin.
RS, CTC, RTC
(Pins 11, 12, and 13)
These pins are part of the oscillator section of the encoder
(see Figure 9).
If an external signal source is used instead of the internal
oscillator, it should be connected to the RS input and the RTC
and CTC pins should be left open.
TE
Transmit Enable (Pin 14)
This active–low transmit enable input initiates transmission
when forced low. An internal pull–up device keeps this input
normally high. The pull–up current is specified in the
Electrical Characteristics table.
Dout
Data Out (Pin 15)
This is the output of the encoder that serially presents the
encoded data word.
VSS
Negative Power Supply (Pin 8)
The most–negative supply potential. This pin is usually
ground.
VDD
Positive Power Supply (Pin 16).
The most–positive power supply pin.
ML145027 AND ML145028 DECODERS
A1 – A5, A1 – A9
Address Inputs (Pins 1 – 5)—ML145027,
Address Inputs (Pins 1 – 5, 15, 14, 13, 12)—ML145028
These are the local address inputs. The states of these pins must
match the appropriate encoder inputs for the VT pin to go high.
The local address may be encoded with trinary or binary data.
D6 – D9
Data Outputs (Pins 15, 14, 13, 12)—ML145027 Only
These outputs present the binary information that is on
encoder inputs A6/D6 through A9/D9. Only binary data is
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관련 데이터시트

부품번호상세설명 및 기능제조사
ML145026

(ML145026 - ML145028) Encoder and Decoder Pairs

LANSDALE Semiconductor
LANSDALE Semiconductor
ML145027

(ML145026 - ML145028) Encoder and Decoder Pairs

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