mc145028 Freescale Semiconductor, Inc, mc145028 Datasheet - Page 2

• Manufacturer Part Number: mc145028
• Description: Mc145027 Encoder And Decoder Pair
• Manufacturer: Freescale Semiconductor, Inc

Introduction
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.
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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:
A6/D6
A7/D7
MC145026 = 2.5 to 18 V
MC145027, MC145028 = 4.5 to 18 V
V
A1
A2
A3
A4
A5
SS
ENCODER
MC145026
MC145026, MC145027, MC145028 Technical Data, Rev. 4
V
D
TE
R
C
R
A9/D9
A8/D8
DD
out
TC
TC
S
Figure 1. Pin Assignments
V
A1
A2
A3
A4
A5
R
C
SS
1
1
DECODERS
MC145027
V
D6
D7
D8
D9
VT
R
D
DD
2
in
/C
2
V
A1
A2
A3
A4
A5
R
C
SS
1
1
DECODERS
MC145028
Freescale Semiconductor
V
A6
A7
A8
A9
VT
R
D
DD
2
in
/C
2