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PDF 145026P Data sheet ( Hoja de datos )
| Número de pieza | 145026P | |
| Descripción | MC145026P | |
| Fabricantes | Motorola Semiconductors | |
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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145026/D
Encoder and Decoder Pairs
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
MC145026
MC145027
MC145028
SC41343
SC41344
16
1
16
1
P SUFFIX
PLASTIC DIP
CASE 648
D SUFFIX
SOG PACKAGE
CASE 751B
16
1
DW SUFFIX
SOG PACKAGE
CASE 751G
ORDERING INFORMATION
MC145026P
MC145026D
Plastic DIP
SOG Package
MC145027P, SC41343P
Plastic DIP
MC145027DW, SC41343DW SOG Package
MC145028P, SC41344P
Plastic DIP
MC145028DW, SC41344DW SOG Package
MC145026
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
MC145027/SC41343
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
MC145028/SC41344
DECODERS
A1 1
A2 2
16 VDD
15 A6
A3 3
A4 4
14 A7
13 A8
A5 5
R1 6
C1 7
VSS 8
12 A9
11 VT
10 R2/C2
9 Din
* 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.
REV 2
1/98
©MOMoTtoOroRla,OInLc.A1998
MC145026•MC145027•MC145028•SC41343•SC41344
1
1 page  
ELECTRICAL CHARACTERISTICS — MC145026 (Voltage Referenced to VSS)
Symbol
Characteristic
VDD
V
VOL
VOH
VIL
VIH
IOH
IOL
Iin
Iin
IDD
Idd
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)
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
ELECTRICAL CHARACTERISTICS — SC41343 and SC41344 (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 = 0 V or VDD) 2.8 — 0.05 — 0.05 — 0.05
5.0 — 0.05 — 0.05 — 0.05
10 — 0.05 — 0.05 — 0.05
VOH High–Level Output Voltage
(Vin = 0 V or VDD) 2.8 2.75
—
2.75
—
2.75
—
5.0 4.95 — 4.95 — 4.95 —
10 9.95 — 9.95 — 9.95 —
VIL Low–Level Input Voltage
(Vout = 2.3 V or 0.5 V) 2.8 — 0.84 — 0.84 — 0.84
(Vout = 4.5 V or 0.5 V) 5.0
—
1.5
—
1.5
—
1.5
(Vout = 9.0 V or 1.0 V) 10 — 3.0 — 3.0 — 3.0
VIH High–Level Input Voltage
(Vout = 0.5 V or 2.3 V) 2.8 1.96 — 1.96 — 1.96 —
(Vout = 0.5 V or 4.5 V) 5.0
3.5
—
3.5
—
3.5
—
(Vout = 1.0 V or 9.0 V) 10
7.0
—
7.0
—
7.0
—
IOH High–Level Output Current
(Vout = 1.4 V)
(Vout = 4.5 V)
(Vout = 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 —
IOL Low–Level Output Current
(Vout = 0.4 V) 2.8 0.35
—
0.3
— 0.24 —
(Vout = 0.5 V) 5.0
0.8
—
0.6
—
0.4
—
(Vout = 1.0 V) 10
3.5
—
2.9
—
2.3
—
Iin Input Current — Din
10 — ± 0.3 — ± 0.3 — ± 1.0
Iin Input Current
A1 – A5 (SC41343)
A1 – A9 (SC41344)
2.8 — — — ± 30 — —
5.0 — — — ± 140 — —
10 — — — ± 600 — —
Cin Input Capacitance (Vin = 0)
IDD Quiescent Current
— — — — 7.5 — —
2.8 — — — 60 — —
5.0 — — — 75 — —
10 — — — 150 — —
Idd Dynamic Supply Current (fc = 20 kHz)
2.8 — — — 300 — —
5.0 — — — 500 — —
10 — — — 1000 — —
Unit
V
V
V
V
mA
mA
µA
µA
pF
µA
µA
MOTOROLA
MC145026•MC145027•MC145028•SC41343•SC41344
5
5 Page 
ENCODER
OSCILLATOR
(PIN 12)
Dout
(PIN 15)
ENCODED
“ONE”
ENCODED
“ZERO”
ENCODED
“OPEN”
DATA PERIOD
Figure 11. Encoder Data Waveforms
500
400
VDD = 15 V
VDD = 10 V
300
200
VDD = 5 V
100
10 20 30 40 50
Clayout (pF) ON PINS 1 – 5 (MC145027); PINS 1 – 5 AND 12 – 15 (MC145028)
Figure 12. fmax vs Clayout — Decoders Only
MOTOROLA
MC145026•MC145027•MC145028•SC41343•SC41344
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet 145026P.PDF ] | |
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