MC145026.PDF

SEMICONDUCTOR TECHNICAL DATA

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by MC145026/D

CMOS

These devices are designed to be used as encoder/decoder pairs in remote

control applications.

The MC145026 encodes nine lines of inf orm ation 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.

•

P SUFFIX

PLASTIC DIP

CASE 648

D SUFFIX

SOG PACKAGE

CASE 751B

Operating Temperature Range: – 40 to + 85 ° C

DW SUFFIX

SOG PACKAGE

CASE 751G

•

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

ORDERING INFORMATION

MC145026P

•

Internal Power–On Reset Forces All Decoder Outputs Low

Plastic DIP

Operating Voltage Range: MC145026 = 2.5 to 18 V *

MC145027, MC145028 = 4.5 to 18 V

MC145026D

SOG Package

•

MC145027P

Plastic DIP

•

For Infrared Applications, See Application Note AN1016/D

MC145027DW

SOG Package

MC145028P

Plastic DIP

MC145028DW

SOG Package

PIN ASSIGNMENTS

MC145026

ENCODER

MC145027

DECODERS

MC145028

DECODERS

V DD

D out

R TC

C TC

A6/D6

R S

R 1

A7/D7

A9/D9

C 1

R 2 /C 2

C 1

R 2 /C 2

V SS

A8/D8

V SS

D in

V SS

D in

REV 3

1/98

W Motorola, Inc. 1998

MOTOROLA WIRELESS SEMICONDUCTOR

SOLUTIONS DEVICE DATA

MC145026 MC145027 MC145028

R S

R TC

C TC

3–PIN

OSCILLATOR

AND

ENABLE

DIVIDER

DATA SELECT

AND

BUFFER

D out

RING COUNTER AND 1–OF–9 DECODER

9 8 7654321

TRINARY

DETECTOR

A6/D6

A7/D7

A8/D8

V DD = PIN 16

V SS = PIN 8

A9/D9

Figure 1. MC145026 Encoder Block Diagram

CONTROL

LOGIC

SEQUENCER CIRCUIT

DATA

EXTRACTOR

D in

C 1

C 2

V DD = PIN 16

V SS = PIN 8

R 1

R 2

Figure 2. MC145027 Decoder Block Diagram

MC145026 MC145027 MC145028

MOTOROLA WIRELESS SEMICONDUCTOR

SOLUTIONS DEVICE DATA

CONTROL

LOGIC

SEQUENCER CIRCUIT

9–BIT

SHIFT

DATA

EXTRACTOR

D in

C 1

C 2

V DD = PIN 16

V SS = PIN 8

R 1

R 2

Figure 3. MC145028 Decoder Block Diagram

MAXIMUM RATINGS* (Voltages Referenced to V SS )

Rating

Symbol

Value

Unit

This device contains protection circuitry to

guard against damage due to high static

voltages or electric fields. However, precau-

tions must be taken to avoid applications of any

voltage higher than maximum rated voltages

to this high–impedance circuit. For proper

operation, V in and V out should be constrained

to the range V SS 3 (V in or V out ) 3 V DD .

V DD

DC Supply Voltage (except SC41343,

SC41344)

– 0.5 to + 18

V DD

DC Supply Voltage (SC41343, SC41344

only)

– 0.5 to + 10

V in

DC Input Voltage

– 0.5 to V DD + 0.5

V out

DC Output Voltage

– 0.5 to V DD + 0.5

I in

DC Input Current, per Pin

± 10

I out

DC Output Current, per Pin

± 10

P D

Power Dissipation, per Package

500

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.

MOTOROLA WIRELESS SEMICONDUCTOR

SOLUTIONS DEVICE DATA

MC145026 MC145027 MC145028

ELECTRICAL CHARACTERISTICS — MC145026 * , MC145027, and MC145028 (Voltage Referenced to V SS )

Guaranteed Limit

V DD

– 40 ° C

25 ° C

85 ° C

V DD

Symbol

Characteristic

i i

Min

Max

Min

Max

Min

Max

Unit

V OL

Low–Level Output Voltage

(V in = V DD or 0)

5.0

—

0.05

—

0.05

—

0.05

V OH

High–Level Output Voltage

(V in = 0 or V DD )

5.0

4.95

9.95

14.95

—

4.95

9.95

14.95

—

4.95

9.95

14.95

—

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

—

1.5

3.0

4.0

—

1.5

3.0

4.0

—

1.5

3.0

4.0

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

3.5

7.0

—

3.5

7.0

—

3.5

7.0

—

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

– 2.5

– 0.52

– 1.3

– 3.6

—

– 2.1

– 0.44

– 1.1

– 3.0

—

– 1.7

– 0.36

– 0.9

– 2.4

—

I OL

Low–Level Output Current

(V out = 0.4 V)

(V out = 0.5 V)

(V out = 1.5 V)

5.0

0.52

1.3

3.6

—

0.44

1.1

3.0

—

0.36

0.9

2.4

—

I in

Input Current — TE

(MC145026, Pull–Up Device)

5.0

—

3.0

120

—

m A

I in

Input Current

R S (MC145026), D in (MC145027, MC145028)

—

0.3

—

0.3

—

1.0

I in

Input Current

A1 – A5, A6/D6 – A9/D9 (MC145026),

A1 – A5 (MC145027),

A1 – A9 (MC145028)

5.0

—

110

—

500

1000

C in

Input Capacitance (V in = 0)

—

7.5

—

I DD

Quiescent Current — MC145026

5.0

—

0.1

0.2

0.3

—

m A

I DD

Quiescent Current — MC145027, MC145028

5.0

—

100

150

—

I dd

Dynamic Supply Current — MC145026

(f c = 20 kHz)

5.0

—

200

400

600

—

m A

I dd

Dynamic Supply Current — MC145027, MC145028

(f c = 20 kHz)

5.0

—

400

800

1200

—

* Also see next Electrical Characteristics table for 2.5 V specifications.

MC145026 MC145027 MC145028

MOTOROLA WIRELESS SEMICONDUCTOR

SOLUTIONS DEVICE DATA

Sbl

i i

ELECTRICAL CHARACTERISTICS — MC145026 (Voltage Referenced to V SS )

Guaranteed Limit

V DD

– 40 ° C

25 ° C

85 ° C

V DD

Symbol

Characteristic

i i

Min

Max

Min

Max

Min

Max

Unit

V OL

Low–Level Output Voltage

(V in = 0 V or V DD )

2.5

—

0.05

—

0.05

—

0.05

V OH

High–Level Output Voltage

(V in = 0 V or V DD )

2.5

2.45

—

2.45

—

2.45

—

V IL

Low–Level Input Voltage

(V out = 0.5 V or 2.0 V)

2.5

—

0.3

—

0.3

—

0.3

V IH

High–Level Input Voltage (V out = 0.5 V or 2.0 V)

2.5

2.2

—

2.2

—

2.2

—

I OH

High–Level Output Current

(V out = 1.25 V)

2.5

0.28

—

0.25

—

0.2

—

I OL

Low–Level Output Current

(V out = 0.4 V)

2.5

0.22

—

0.2

—

0.16

—

I in

Input Current (TE — Pull–Up Device)

2.5

—

0.09

1.8

—

m A

I in

Input Current (A1–A5, A6/D6–A9/D9)

2.5

—

I DD

Quiescent Current

2.5

—

0.05

—

m A

I dd

Dynamic Supply Current (f c = 20 kHz)

2.5

—

m A

SWITCHING CHARACTERISTICS — MC145026*, MC145027, and MC145028 (C L = 50 pF, T A = 25 ° C)

Figure

Guaranteed Limit

Figure

No.

Symbol

Characteristic

i i

V DD

Min

Max

Unit

t TLH , t THL

Output Transition Time

4,8

5.0

—

200

100

t r

D in Rise Time — Decoders

5.0

—

t f

D in Fall Time — Decoders

5.0

—

5.0

4.0

m s

f osc

Encoder Clock Frequency

5.0

0.001

2.0

5.0

MHz

Decoder Frequency — Referenced to Encoder Clock

5.0

1.0

240

410

450

kHz

t w

TE Pulse Width — Encoders

5.0

—

* Also see next Switching Characteristics table for 2.5 V specifications.

SWITCHING CHARACTERISTICS — MC145026 (C L = 50 pF, T A = 25 ° C)

Figure

Guaranteed Limit

Figure

No.

Symbol

Characteristic

i i

V DD

Min

Max

Unit

t TLH , t THL

Output Transition Time

4, 8

2.5

—

450

f osc

Encoder Clock Frequency

2.5

1.0

250

kHz

t w

TE Pulse Width

2.5

1.5

—

m s

MOTOROLA WIRELESS SEMICONDUCTOR

SOLUTIONS DEVICE DATA

MC145026 MC145027 MC145028

Sbl

i i

Sbl

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