Motorola MC145028D, MC145028P, MC145027P, MC145026D, MC145026P Datasheet
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MC145026•MC145027•MC145028•SC41343•SC41344MOTOROLA
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
125
4
3
2
1
8
7
6
C
TC
R
TC
TE
D
out
V
DD
A8/D8
A9/D9
R
S
A4
A3
A2
A1
V
SS
A7/D7
A6/D6
A5
13
14
15
16
9
10
11
125
4
3
2
1
8
7
6
D9
D8
D7
D6
V
DD
D
in
R2/C
2
VT
A4
A3
A2
A1
V
SS
C
1
R
1
A5
13
14
15
16
9
10
11
125
4
3
2
1
8
7
6
A9
A8
A7
A6
V
DD
D
in
R2/C
2
VT
A4
A3
A2
A1
V
SS
C
1
R
1
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 Plastic DIP
MC145026D SOG Package
MC145027P, SC41343P Plastic DIP
MC145027DW, SC41343DW SOG Package
MC145028P, SC41344P Plastic DIP
MC145028DW, SC41344DW SOG Package
D SUFFIX
SOG PACKAGE
CASE 751B
DW SUFFIX
SOG PACKAGE
CASE 751G
16
1
16
1
16
1
Motorola, Inc. 1998
REV 2
1/98
MC145026•MC145027•MC145028•SC41343•SC41344 MOTOROLA
2
Figure 1. MC145026 Encoder Block Diagram
TE
15
RING COUNTER AND 1–OF–9 DECODER
9
87654321
1
2
3
4
5
6
7
9
10
R
S
R
TC
C
TC
1312
14
3–PIN
OSCILLAT OR
AND
ENABLE
÷
4
DIVIDER
DATA SELECT
AND
BUFFER
D
out
TRINARY
DETECTOR
VDD = PIN 16
VSS = PIN 8
A1
A2
A3
A4
A5
A6/D6
A7/D7
A8/D8
A9/D9
11
54321
SEQUENCER CIRCUIT
1
2
3
4
5
A1
A2
A3
A4
A5
CONTROL
LOGIC
11
15
D6
LATCH
VT
4–BIT SHIFT REGISTER
9
D
in
DATA
EXTRACTOR
VDD = PIN 16
VSS = PIN 8
C
1
C
2
R
2
R
1
76
Figure 2. MC145027 Decoder Block Diagram
10
D7
D8
D9
14
13
12
MC145026•MC145027•MC145028•SC41343•SC41344MOTOROLA
3
987654321
SEQUENCER CIRCUIT
1
2
3
4
5
15
14
13
12
A1
A2
A3
A4
A5
A6
A7
A8
A9
CONTROL
LOGIC
9–BIT
SHIFT
REGISTER
9
D
in
11
VT
DATA
EXTRACTOR
Figure 3. MC145028 Decoder Block Diagram
VDD = PIN 16
VSS = PIN 8
C
1
C
2
R
2
R
1
76
10
MAXIMUM RATINGS* (Voltages Referenced to V
SS
)
Rating Symbol Value Unit
V
DD
DC Supply Voltage (except SC41343,
SC41344)
– 0.5 to + 18 V
V
DD
DC Supply Voltage (SC41343, SC41344
only)
– 0.5 to + 10 V
V
in
DC Input Voltage – 0.5 to VDD + 0.5 V
V
out
DC Output Voltage – 0.5 to VDD + 0.5 V
I
in
DC Input Current, per Pin ± 10 mA
I
out
DC Output Current, per Pin ± 10 mA
P
D
Power Dissipation, per Package 500 mW
T
stg
Storage Temperature – 65 to + 150 °C
T
L
Lead Temperature, 1 mm from Case for
10 Seconds
260 °C
*Maximum Ratings are those values beyond which damage to the device may occur. Func-
tional operation should be restricted to the limits in the Electrical Characteristics tables or
Pin Descriptions section.
This device contains protection circuitry to
guard against damage due to high static
voltages or electric fields. However, precautions must be taken to avoid applications of any
voltage higher than maximum rated voltages
to this high–impedance circuit. For proper
operation, Vin and V
out
should be constrained
to the range VSS ≤ (Vin or V
out
) ≤ VDD.
MC145026•MC145027•MC145028•SC41343•SC41344 MOTOROLA
4
ELECTRICAL CHARACTERISTICS — MC145026*, MC145027, and MC145028 (Voltage Referenced to V
SS
)
Guaranteed Limit
V
– 40°C 25°C 85°C
Symbol Characteristic
V
DD
V
Min Max Min Max Min Max
Unit
V
OL
Low–Level Output Voltage (Vin = VDD or 0) 5.0
10
15
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
V
V
OH
High–Level Output Voltage (Vin = 0 or VDD) 5.0
10
15
4.95
9.95
14.95
—
—
—
4.95
9.95
14.95
—
—
—
4.95
9.95
14.95
—
—
—
V
V
IL
Low–Level Input Voltage
(V
out
= 4.5 or 0.5 V)
(V
out
= 9.0 or 1.0 V)
(V
out
= 13.5 or 1.5 V)
5.0
10
15
—
—
—
1.5
3.0
4.0
—
—
—
1.5
3.0
4.0
—
—
—
1.5
3.0
4.0
V
V
IH
High–Level Input Voltage
(V
out
= 0.5 or 4.5 V)
(V
out
= 1.0 or 9.0 V)
(V
out
= 1.5 or 13.5 V)
5.0
10
15
3.5
7.0
11
—
—
—
3.5
7.0
11
—
—
—
3.5
7.0
11
—
—
—
V
I
OH
High–Level Output Current
(V
out
= 2.5 V)
(V
out
= 4.6 V)
(V
out
= 9.5 V)
(V
out
= 13.5 V)
5.0
5.0
10
15
– 2.5
– 0.52
– 1.3
– 3.6
—
—
—
—
– 2.1
– 0.44
– 1.1
– 3.0
—
—
—
—
– 1.7
– 0.36
– 0.9
– 2.4
—
—
—
—
mA
I
OL
Low–Level Output Current
(V
out
= 0.4 V)
(V
out
= 0.5 V)
(V
out
= 1.5 V)
5.0
10
15
0.52
1.3
3.6
—
—
—
0.44
1.1
3.0
—
—
—
0.36
0.9
2.4
—
—
—
mA
I
in
Input Current — TE
(MC145026, Pull–Up Device)
5.0
10
15
—
—
—
—
—
—
3.0
16
35
11
60
120
—
—
—
—
—
—
µA
I
in
Input Current
RS (MC145026), Din (MC145027, MC145028)
15 — ± 0.3 — ± 0.3 — ± 1.0 µA
I
in
Input Current
A1 – A5, A6/D6 – A9/D9 (MC145026),
A1 – A5 (MC145027),
A1 – A9 (MC145028)
5.0
10
15
—
—
—
—
—
—
—
—
—
± 110
± 500
± 1000
—
—
—
—
—
—
µA
C
in
Input Capacitance (Vin = 0) — — — — 7.5 — — pF
I
DD
Quiescent Current — MC145026 5.0
10
15
—
—
—
—
—
—
—
—
—
0.1
0.2
0.3
—
—
—
—
—
—
µA
I
DD
Quiescent Current — MC145027, MC145028 5.0
10
15
—
—
—
—
—
—
—
—
—
50
100
150
—
—
—
—
—
—
µA
I
dd
Dynamic Supply Current — MC145026
(fc = 20 kHz)
5.0
10
15
—
—
—
—
—
—
—
—
—
200
400
600
—
—
—
—
—
—
µA
I
dd
Dynamic Supply Current — MC145027, MC145028
(fc = 20 kHz)
5.0
10
15
—
—
—
—
—
—
—
—
—
400
800
1200
—
—
—
—
—
—
µA
*Also see next Electrical Characteristics table for 2.5 V specifications.
MC145026•MC145027•MC145028•SC41343•SC41344MOTOROLA
5
ELECTRICAL CHARACTERISTICS — MC145026 (Voltage Referenced to V
SS
)
Guaranteed Limit
V
– 40°C 25°C 85°C
Symbol Characteristic
V
DD
V
Min Max Min Max Min Max
Unit
V
OL
Low–Level Output Voltage (Vin = 0 V or VDD) 2.5 — 0.05 — 0.05 — 0.05 V
V
OH
High–Level Output Voltage (Vin = 0 V or VDD) 2.5 2.45 — 2.45 — 2.45 — V
V
IL
Low–Level Input Voltage (V
out
= 0.5 V or 2.0 V) 2.5 — 0.3 — 0.3 — 0.3 V
V
IH
High–Level Input Voltage (V
out
= 0.5 V or 2.0 V) 2.5 2.2 — 2.2 — 2.2 — V
I
OH
High–Level Output Current (V
out
= 1.25 V) 2.5 0.28 — 0.25 — 0.2 — mA
I
OL
Low–Level Output Current (V
out
= 0.4 V) 2.5 0.22 — 0.2 — 0.16 — mA
I
in
Input Current (TE — Pull–Up Device) 2.5 — — 0.09 1.8 — — µA
I
in
Input Current (A1–A5, A6/D6–A9/D9) 2.5 — — — ± 25 — — µA
I
DD
Quiescent Current 2.5 — — — 0.05 — — µA
I
dd
Dynamic Supply Current (fc = 20 kHz) 2.5 — — — 40 — — µA
ELECTRICAL CHARACTERISTICS — SC41343 and SC41344 (Voltage Referenced to V
SS
)
Guaranteed Limit
V
– 40°C 25°C 85°C
Symbol Characteristic
V
DD
V
Min Max Min Max Min Max
Unit
V
OL
Low–Level Output Voltage (Vin = 0 V or VDD) 2.8
5.0
10
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
—
—
—
0.05
0.05
0.05
V
V
OH
High–Level Output Voltage (Vin = 0 V or VDD) 2.8
5.0
10
2.75
4.95
9.95
—
—
—
2.75
4.95
9.95
—
—
—
2.75
4.95
9.95
—
—
—
V
V
IL
Low–Level Input Voltage
(V
out
= 2.3 V or 0.5 V)
(V
out
= 4.5 V or 0.5 V)
(V
out
= 9.0 V or 1.0 V)
2.8
5.0
10
—
—
—
0.84
1.5
3.0
—
—
—
0.84
1.5
3.0
—
—
—
0.84
1.5
3.0
V
V
IH
High–Level Input Voltage
(V
out
= 0.5 V or 2.3 V)
(V
out
= 0.5 V or 4.5 V)
(V
out
= 1.0 V or 9.0 V)
2.8
5.0
10
1.96
3.5
7.0
—
—
—
1.96
3.5
7.0
—
—
—
1.96
3.5
7.0
—
—
—
V
I
OH
High–Level Output Current
(V
out
= 1.4 V)
(V
out
= 4.5 V)
(V
out
= 9.0 V)
2.8
5.0
10
– 0.73
– 0.59
– 1.3
—
—
—
– 0.7
– 0.5
– 1.1
—
—
—
– 0.55
– 0.41
– 0.9
—
—
—
mA
I
OL
Low–Level Output Current
(V
out
= 0.4 V)
(V
out
= 0.5 V)
(V
out
= 1.0 V)
2.8
5.0
10
0.35
0.8
3.5
—
—
—
0.3
0.6
2.9
—
—
—
0.24
0.4
2.3
—
—
—
mA
I
in
Input Current — D
in
10 — ± 0.3 — ± 0.3 — ± 1.0 µA
I
in
Input Current
A1 – A5 (SC41343)
A1 – A9 (SC41344)
2.8
5.0
10
—
—
—
—
—
—
—
—
—
± 30
± 140
± 600
—
—
—
—
—
—
µA
C
in
Input Capacitance (Vin = 0) — — — — 7.5 — — pF
I
DD
Quiescent Current 2.8
5.0
10
—
—
—
—
—
—
—
—
—
60
75
150
—
—
—
—
—
—
µA
I
dd
Dynamic Supply Current (fc = 20 kHz) 2.8
5.0
10
—
—
—
—
—
—
—
—
—
300
500
1000
—
—
—
—
—
—
µA
MC145026•MC145027•MC145028•SC41343•SC41344 MOTOROLA
6
SWITCHING CHARACTERISTICS — MC145026*, MC145027, and MC145028 (C
L
= 50 pF, TA = 25°C)
Figure
Guaranteed Limit
Symbol Characteristic
Figure
No.
V
DD
Min Max
Unit
t
TLH
, t
THL
Output Transition Time 4,8 5.0
10
15
—
—
—
200
100
80
ns
t
r
Din Rise Time — Decoders 5 5.0
10
15
—
—
—
15
15
15
µs
t
f
Din Fall Time — Decoders 5 5.0
10
15
—
—
—
15
5.0
4.0
µs
f
osc
Encoder Clock Frequency 6 5.0
10
15
0.001
0.001
0.001
2.0
5.0
10
MHz
f Decoder Frequency — Referenced to Encoder Clock 12 5.0
10
15
1.0
1.0
1.0
240
410
450
kHz
t
w
TE Pulse Width — Encoders 7 5.0
10
15
65
30
20
—
—
—
ns
*Also see next Switching Characteristics table for 2.5 V specifications.
SWITCHING CHARACTERISTICS — MC145026 (C
L
= 50 pF, TA = 25°C)
Figure
Guaranteed Limit
Symbol Characteristic
Figure
No.
V
DD
Min Max
Unit
t
TLH
, t
THL
Output Transition Time 4, 8 2.5 — 450 ns
f
osc
Encoder Clock Frequency 6 2.5 1.0 250 kHz
t
w
TE Pulse Width 7 2.5 1.5 — µs
SWITCHING CHARACTERISTICS — SC41343 and SC41344 (C
L
= 50 pF, TA = 25°C)
Figure
Guaranteed Limit
Symbol Characteristic
Figure
No.
V
DD
Min Max
Unit
t
TLH
, t
THL
Output Transition Time 4, 8 2.8
5.0
10
—
—
—
320
200
100
ns
t
r
Din Rise Time 5 2.8
5.0
10
—
—
—
15
15
15
µs
t
f
Din Fall Time 5 2.8
5.0
10
—
—
—
15
15
5.0
µs
f Decoder Frequency — Referenced to Encoder Clock 12 2.8
5.0
10
1.0
1.0
1.0
100
240
410
kHz
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