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Control Transmitter. MC44107 Datasheet

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Control Transmitter. MC44107 Datasheet






MC44107 Transmitter. Datasheet pdf. Equivalent




MC44107 Transmitter. Datasheet pdf. Equivalent





Part

MC44107

Description

IR Remote Control Transmitter



Feature


www.DataSheet4U.com MOTOROLA SEMICONDUC TOR TECHNICAL DATA Order this document by MC44107/D Product Preview IR Remot e Control Transmitter CMOS The MC44107 remote control transmitter converts a k eyboard input into a pulse code modulat ed signal suitable for infrared transmi ssion to an appropriate receiver. Its l arge command capacity, 512 commands, ma kes it highly suit.
Manufacture

Motorola Semiconductor

Datasheet
Download MC44107 Datasheet


Motorola Semiconductor MC44107

MC44107; ed to remote control applications in TV, video, hi–fi, etc. The transmitter i s an LSI circuit realized in complement ary MOS technology. • • • • • • Binary Coded, 9–Bit PCM Data Wor d Simple Modulator Requirements One–P in Reference Oscillator for External Ce ramic Resonator Very Low (Maximum 1 µA ) Standby Current Consumption Wide Oper ating Voltage Range: 4 to 10 V Operat.


Motorola Semiconductor MC44107

ing Temperature Range: – 40 to 85° C 20 1 MC44107 P SUFFIX PLASTIC DIP CASE 738 ORDERING INFORMATION MC44107P Pla stic DIP PIN ASSIGNMENT R5 R2 R7 Dout R1 R6 R8 R4 R3 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 MUX CD CF OS C CG CC CB CE CH PAGE BLOCK DIAGRAM VD D OSC 17 OSC 20 ÷ 24 VSS MODULATOR 25 ÷ 25 4 DATA MUX 11 PAGE ÷ 22 R1 R2 R3 R4 R5 R6 R7 R8 .


Motorola Semiconductor MC44107

5 2 9 8 1 6 3 7 TEST 10 VSS ROW ENCODER SUPERVISE AND CONTROL 9–BIT SHIFT RE G. 14 15 SCANNER COLUMN DECODER 19 13 18 16 12 CB CC CD CE CF CG CH This do cument contains information on a produc t under development. Motorola reserves the right to change or discontinue this product without notice. REV 2 8/95 © Motorola, Inc. 1995 MOTOROLA MC44107 1 www.DataSheet4U.co.

Part

MC44107

Description

IR Remote Control Transmitter



Feature


www.DataSheet4U.com MOTOROLA SEMICONDUC TOR TECHNICAL DATA Order this document by MC44107/D Product Preview IR Remot e Control Transmitter CMOS The MC44107 remote control transmitter converts a k eyboard input into a pulse code modulat ed signal suitable for infrared transmi ssion to an appropriate receiver. Its l arge command capacity, 512 commands, ma kes it highly suit.
Manufacture

Motorola Semiconductor

Datasheet
Download MC44107 Datasheet




 MC44107
www.DMataOSTheOeRt4UO.LcoAm
SEMICONDUCTOR TECHNICAL DATA
Product Preview
IR Remote Control Transmitter
CMOS
The MC44107 remote control transmitter converts a keyboard input into a
pulse code modulated signal suitable for infrared transmission to an appropriate
receiver. Its large command capacity, 512 commands, makes it highly suited to
remote control applications in TV, video, hi–fi, etc. The transmitter is an LSI
circuit realized in complementary MOS technology.
Binary Coded, 9–Bit PCM Data Word
Simple Modulator Requirements
One–Pin Reference Oscillator for External Ceramic Resonator
Very Low (Maximum 1 µA) Standby Current Consumption
Wide Operating Voltage Range: 4 to 10 V
Operating Temperature Range: – 40 to 85° C
OSC 17
OSC
BLOCK DIAGRAM
VDD
20
÷ 24
÷ 25 MUX ÷ 25
Order this document
by MC44107/D
MC44107
P SUFFIX
PLASTIC DIP
20 CASE 738
1
ORDERING INFORMATION
MC44107P Plastic DIP
PIN ASSIGNMENT
R5 1
R2 2
R7 3
Dout 4
R1 5
R6 6
R8 7
R4 8
R3 9
VSS 10
20 MUX
19 CD
18 CF
17 OSC
16 CG
15 CC
14 CB
13 CE
12 CH
11 PAGE
4
MODULATOR
DATA
11
PAGE
R1 5
R2 2
9
R3
R4 8
1
R5
6
R6
R7 3
R8 7
ROW
ENCODER
÷ 22
TEST
SUPERVISE
AND
CONTROL
SCANNER
10
VSS
9–BIT
SHIFT
REG.
COLUMN
DECODER
14
15
19
13
18
16
12
CB
CC
CD
CE
CF
CG
CH
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
REV 2
8/95
©MOMoTtoOroRla,OInLc.A1995
MC44107
1




 MC44107
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁwww.DataSheet4U.com
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁMAXIMUM RATINGS* (Voltages referenced to VSS)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁParameter
Symbol
Value
Unit
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC Supply Voltage
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁInput Voltage, All Inputs
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC Current Drain per Pin (Except Signal
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁOut and VDD)
VDD
Vin
I
– 0.5 to + 12
– 0.5 to VDD + 0.5
2
V
V
mA
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁDC Current Drain (Signal Out and VDD)
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁStorage Temperature Range
I
Tstg
10
– 65 to + 150
mA
°C
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ* MaximumRatingsarethosevaluesbeyondwhichdamagetothedevicemayoccur.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, it is ad-
vised that precautions be taken to avoid
application of voltage higher than maximum
rated voltages to this high–impedance circuit.
For proper operation it is recommended that
Vin and Vout be constrained to the range VSS
(Vin or Vout) VDD.
Unused inputs must always be tied to an
appropriate logic voltage level (e.g., either VSS
or VDD).
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Inputs R1R8 and PAGE (with Pull–Up)
Iin at Vin = 1.2 V
Iin at Vin = 3 V
Iin at Vin = 2.8 V
Iin at Vin = 7 V
VIH
VIH
VIL
VIL
Outputs CBCH (Open Drain)
Ion at Von = 1.2 V
Ion at Von = 3 V
Ioff
Ioff
Output DATA VOH at Isource = 1.0 mA
Iin
VIH
VIL
Ion
Ioff
VOH
VDD
Vdc
4
10
4
10
4
10
4
10
4
10
4
10
4
10
– 40°C
Min Max
— 70
— 350
5—
25 —
2.8 —
7—
— 1.2
—3
270
1350
3.2
9.6
1
1
25°C
Min Typ
——
——
4—
20 —
2.8 —
7—
——
——
200
1000
3.0
9.5
1
1
Max
50
250
1.2
3
1
0.5
85°C
Min Max
— 40
— 200
3—
15 —
2.8 —
7—
— 1.2
—3
160 —
800 —
—1
—1
2.8 —
9.4 —
Unit
µA
V
V
µA
µA
V
VOL at Isink = 1.0 mA VOL
4
10
— 0.8 —
— 0.4 —
— 1 — 1.2 V
— 0.5 — 0.6
Supply Voltage
Standby Current
VDD
4
10
4
— 10
4
10 V
IDDSTB
4
— 0.02
1
10
— 0.02
1
— — µA
——
Active Mode Current
IDDACT
4
— 0.07
1
10
— 0.45
2
— — mA
——
Oscillator Frequency
fosc — — — 430 — 530 — — kHz
MC44107
2
MOTOROLA




 MC44107
www.DataSheet4U.com
CIRCUIT OPERATION
The transmitter emits a 9–bit, labelled A (LSB) to I (MSB),
binary code able to encode 512 commands organized as
8 pages of 64 commands. All of these commands are user
selectable except the last command (511) which is used as
an SST, Start/Stop Transmission code.
Each bit of the transmitted signal is in the form of a biphase
pulse code modulated (PCM) signal, whose coding is shown
in Figure 1.
BIT–n
‘0’
AM
f1*
‘1’ f1*
* f1 is a train of pulses at the
carrier frequency ÷ 16.
Figure 1. Signal Coding
The keyboard can be a simple switch matrix, connected
between the eight row inputs (1 to 8) and the seven column
outputs (B to H). VSS acts as the eight column line to give the
full complement of 64 commands per page. The maximum
“ON” resistance of the keyboard must be limited to 500 .
Page access is accomplished by connecting, by means of
a key, the page input to one of the seven column outputs or
by leaving the input circuit open.
One of the circuit’s major features is its low standby cur-
rent consumption — typically less than 1 µA. For this reason
the battery may be left continuously in circuit.
As soon as a key is selected, the circuit switches to its ac-
tive mode and enables the oscillator. To allow for accidental
activation and/or key bounce, the circuit requires that the key
is held for a minimum delay of tkey, which in the case of a
500 kHz oscillator is 65.6 ms. After this delay the column/
row/page command, consisting of a string of messages (see
Figure 2), appropriate to the key selected will be transmitted
and repeated until the key is released.
Any page key required must be selected before, and held
during, the selection of the column/row matrix key. If this se-
quence is not followed, the circuit will default to the appropri-
ate command between 0 and 63. If two or more page keys
are accidentally held down, only the first one pressed will be
detected.
A command consists of several messages. Each com-
mand starts with the message 511 (SST) followed by the
message appropriate to the key selected. These messages
are repeated until the key is released. The final message is
always followed by the SST message, 511.
Every message consists of a pre–bit, a pre–bit pause, a
start–bit, and nine data bits, where the pre–bit and the start–
bit are always logical “1”. The pre–bit allows for the set up of
the AGC loop in the receiving preamplifier. The truth tables
for data bits are given in Tables 1 and 2, while Figure 2
shows the timing relationships between the commands,
messages, and modulation.
In the event of accidental multi–key operation, the circuit
will react in one of three ways, depending on the combination
of the keys selected.
When two or more keys are connected to the same row in-
put and any column output except A, the command appropri-
ate to the first key selected will be transmitted until that key is
released. After the SST code has been transmitted, assum-
ing another key is still selected, the command appropriate to
that key will be transmitted. If the other key has been re-
leased in the meantime, the circuit will revert to standby.
If two keys are selected in the same row with one being
connected to column A, any transmission will terminate with
the SST code and then the circuit will transmit the command
appropriate to the key connected to column A.
In the case where two or more keys connected to the same
column are selected, the circuit reacts in a normal manner to
the first key activated. Upon selection of the second key, the
SST code is transmitted and the circuit will revert to the
standby mode. Only when the multi–key condition is re-
leased and a single key is selected will the circuit resume op-
eration, as previously described.
MOTOROLA
MC44107
3



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