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PDF ML145026 Data sheet ( Hoja de datos )
| Número de pieza | ML145026 | |
| Descripción | (ML145026 - ML145028) Encoder and Decoder Pairs | |
| Fabricantes | LANSDALE Semiconductor | |
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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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Issue 0
1 page  
ML145026, ML145027, ML145028
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LANSDALE Semiconductor, Inc.
ELECTRICAL CHARACTERISTICS — ML145026 (Voltage Referenced to VSS)
Symbol
VOL
VOH
VIL
VIH
IOH
IOL
Iin
Iin
IDD
Idd
Characteristic
Low–Level Output Voltage
(Vin = 0 V or VDD)
High–Level Output Voltage
(Vin = 0 V or VDD)
Low–Level Input Voltage (Vout = 0.5 V or 2.0 V)
High–Level Input Voltage (Vout = 0.5 V or 2.0 V)
High–Level Output Current
(Vout = 1.25 V)
Low–Level Output Current
(Vout = 0.4 V)
Input Current (TE — Pull–Up Device)
Input Current (A1–A5, A6/D6–A9/D9)
Quiescent Current
Dynamic Supply Current (fc = 20 kHz)
VDD
V
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
– 40°C
Min Max
— 0.05
2.45 —
— 0.3
2.2 —
0.28 —
0.22 —
——
——
——
——
Guaranteed Limit
25°C
Min Max
— 0.05
2.45 —
— 0.3
2.2 —
0.25 —
0.2 —
0.09 1.8
— ± 25
— 0.05
— 40
85°C
Min Max
— 0.05
2.45 —
— 0.3
2.2 —
0.2 —
0.16 —
——
——
——
——
Unit
V
V
V
V
mA
mA
µA
µA
µA
µA
SWITCHING CHARACTERISTICS — ML145026*, ML145027, and ML145028 (CL = 50 pF, TA = 25°C)
Symbol
Characteristic
Figure
No.
VDD
Guaranteed Limit
Min Max
tTLH, tTHL Output Transition Time
4,8 5.0 — 200
10 — 100
15 —
80
tr Din Rise Time — Decoders
5 5.0 —
10 —
15 —
15
15
15
tf Din Fall Time — Decoders
5 5.0 —
15
10 — 5.0
15 — 4.0
fosc Encoder Clock Frequency
6
5.0 0.001
2.0
10 0.001 5.0
15 0.001
10
f Decoder Frequency — Referenced to Encoder Clock
12 5.0 1.0 240
10 1.0 410
15 1.0 450
tw TE Pulse Width — Encoders
7 5.0 65
10 30
15 20
—
—
—
* Also see next Switching Characteristics table for 2.5 V specifications.
Unit
ns
µs
µs
MHz
kHz
ns
SWITCHING CHARACTERISTICS — ML145026 (CL = 50 pF, TA = 25°C)
Symbol
tTLH, tTHL
fosc
tw
Characteristic
Output Transition Time
Encoder Clock Frequency
TE Pulse Width
Figure
No.
4, 8
6
7
VDD
2.5
2.5
2.5
Guaranteed Limit
Min Max
— 450
1.0 250
1.5 —
Unit
ns
kHz
µs
Page 5 of 19
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Issue 0
5 Page 
ML145026, ML145027, ML145028
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LANSDALE Semiconductor, Inc.
Page 11 of 19
NO
HAS
THE TRANSMISSION
BEGUN?
YES
DOES
THE 5–BIT
ADDRESS MATCH
THE ADDRESS
PINS?
YES
STORE
THE
4–BIT
DATA
NO
DOES
THIS DATA
MATCH THE PREVIOUSLY
STORED
DATA?
YES
NO
IS THIS
AT LEAST THE
2ND CONSECUTIVE
MATCH SINCE VT
DISABLE?
YES
LATCH DATA
ONTO OUTPUT
PINS AND
ACTIVATE VT
NO
DISABLE VT
ON THE 1ST
ADDRESS MISMATCH
DISABLE VT
ON THE 1ST
DATA MISMATCH
HAVE
4–BIT TIMES
PASSED?
NO
HAS
NO A NEW
TRANSMISSION
BEGUN?
YES
YES
DISABLE
VT
Figure 13. ML145027 Flowchart
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Issue 0
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet ML145026.PDF ] | |
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