VIDEO APPLICATIONS. STV3012 Datasheet

STV3012 APPLICATIONS. Datasheet pdf. Equivalent


ST Microelectronics STV3012
( DataSheet : www.DataSheet4U.com )
STV3012
REMOTE CONTROL TRANSMITTER
FOR AUDIO AND VIDEO APPLICATIONS
. TWO TIMING AND DATA FORMAT MODES
. 7 SUB-SYSTEM ADDRESSES
. UP TO 64 COMMANDS PER SUB-SYSTEM
ADDRESS
. KEY RELEASE DETECTION BY TOGGLE BIT
(1 toggle bit in mode A and 2 toggle bits in
mode B)
. HIGH CURRENT REMOTE OUTPUT
AT VDD = 3V (-IOH = 80mA)
. VERY LOW STAND-BY CURRENT (< 2µA)
. 1mA OPERATIONAL CURRENT AT 6V SUP-
PLY
. CERAMIC RESONATOR CONTROLLED
FREQUENCY (typ. 450kHz)
. MODULATED TRANSMISSION
. SUPPLY VOLTAGE RANGE 2V TO 6.5V
. LOW NUMBER OF EXTERNAL COMPO-
NENTS
PRELIMINARY DATA
DIP20
(Plastic Package)
ORDER CODE : STV3012
PIN CONNECTIONS
DESCRIPTION
The STV3012 is a general purpose infrared remote
control transmitter system for low voltage supply
applications. It is able to generate a total number
of 448 commands which are divided into 7 sub-sys-
tem groups with 64 commands each. The sub-sys-
tem code may be selected by a press button, a
slider switch or hard wired. Two different timing and
data format modes are available.
REMO
SEN6N
SEN5N
SEN4N
SEN3N
SEN2N
SEN1N
SEN0N
ADRM
VSS
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
March 1993
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
VDD
DRV6N
DRV5N
DRV4N
DRV3N
DRV2N
DRV1N
DRV0N
OSCO
OSCI
1/8
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STV3012 Datasheet
Recommendation STV3012 Datasheet
Part STV3012
Description REMOTE CONTROL TRANSMITTER FOR AUDIO AND VIDEO APPLICATIONS
Feature STV3012; ( DataSheet : www.DataSheet4U.com ) STV3012 REMOTE CONTROL TRANSMITTER FOR AUDIO AND VIDEO APPLICAT.
Manufacture ST Microelectronics
Datasheet
Download STV3012 Datasheet




ST Microelectronics STV3012
STV3012
BLOCK DIAGRAM
OSCO 12
OSCI 11
OSCILLATOR
DIVIDER
SEN6N 2
SEN5N 3
SEN4N 4
SEN3N 5
SEN2N 6
SEN1N 7
SEN0N 8
REMO 1
REMOTE
PARALLEL
/SERIAL
CONVERTER
MASTER
CLEAR
SYST.
CONTR
20 VDD
10 VSS
9 ADRM
19 DRV6N
18 DRV5N
17 DRV4N
16 DRV3N
15 DRV2N
14 DRV1N
13 DRV0N
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
VI
VO
±I
- I(REMO)
Ptot
Tstg
Toper
Parameter
Supply Voltage
Input Voltage
Output Voltage
D.C. Current into any input or output
Peak REMO Output Current during 10µs, duty factor = 1%
Power Dissipation per package for Tamb = - 20 to + 70oC
Storage Temperature
Operating Ambient Temperature
Value
- 0.3, 7.0
- 0.3, VDD + 0.3
- 0.3, VDD + 0.3
10
300
200
- 55, + 125
-20, + 70
Unit
V
V
V
mA
mA
mW
oC
oC
ELECTRICAL CHARACTERISTICS
VSS = 0V, TA = 25oC (unless otherwise specified)
Symbol
VDD
IDD
Parameter
Supply Voltage
Supply Current
Test Conditions
TA = 0 to + 70oC
Active fOSC = 455kHz
REMO Output unload
VDD = 3V
VDD = 6V
Inactive (stand-by mode) VDD = 6V
fOSC Oscill. Frequency
VDD = 2 to 6.5V (ceramic resonator)
KEYBOARD MATRIX - Inputs SEN0N to SEN6N
VIL Input Voltage Low
VDD = 2 to 6.5V
VIH Input Voltage High
VDD = 2 to 6.5V
- II Input Current
VDD = 2V, VI = 0V
VDD = 6.5V, VI = 0V
II Input Leakage Current VDD = 6.5V, VI = VDD
KEYBOARD MATRIX - Outputs DRV0N to DRV6N
VOL Output Voltage "ON"
VDD = 2V, IO = 0.1mA
VDD = 6.5V, IO = 1.0mA
IO Output Current "OFF" VDD = 6.5V, VO = 6.5V
Min.
2
350
Typ.
0.25
1.0
Max.
6.5
0.5
2
2
600
Unit
V
mA
mA
µA
kHz
0.7 x VDD
10
100
0.3 x VDD
100
600
1
V
V
µA
µA
µA
0.3 V
0.6 V
10 µA
2/8



ST Microelectronics STV3012
STV3012
ELECTRICAL CHARACTERISTICS
Tamb = 25oC, unless otherwise specified
Symbol
Parameter
Test Conditions
CONTROL INPUT ADRM
VIL Input Voltage Low
VIH Input Voltage High
IIL Input Current Low
Pull-up Act. Oper. Condition, VIN = VSS
(switched P and N
VDD = 2V
channel pull-up/pull down)
VDD = 6.5V
IIH Input Current High
Pull-down Act. Stand-by Cond.,VIN = VDD
(switched P and N
VDD = 2V
channel pull-up/pull down)
VDD = 6.5V
DATA OUTPUT REMO
- IOH Output Current High
IOL Output Current Low
tOH Pulse Length
VDD
VDD
=
=
2.5V,
2.5V,
VOH
VOH
=
=
0.8V,
0.8V,
TA
TA
=
=
70oC
25oC
VDD = 6.5V, VOH = 5V
VDD = 2V, VOL = 0.4V
VDD = 6.5V, VOL = 0.4V
VDD = 6.5V, Oscill. Stopped
OSCILLATOR
II Input Current
VOH Output Voltage high
VOL Output Voltage Low
OSCI at VDD
VDD = 2V
VDD = 6.5V
VDD = 6.5V, - IOH = 0.1mA
VDD = 6.5V, IOL = 0.1mA
Min. Typ. Max. Unit
0.7 x VDD
-10
-100
10
100
0.3 x VDD
V
V
-100
-600
µA
µA
100 µA
600 µA
70 mA
80 mA
80 mA
0.6 mA
0.6 mA
1 msec
5
VDD - 0.8
5 µA
7 µA
V
0.7 V
I - INPUTS AND OUTPUTS
I.1 - Key Matrix Inputs and Outputs (DRV0N to
DRV6N and SEN0N to SEN6N)
The transmitter keyboard is arranged as a scanned
matrix. The matrix consists of 7 driver ouputs and
7 sense inputs. The driver outputs DRV0N to
DRV6N are open drain N-channel transistors and
they are conductive in the stand-by mode. The 7
sense inputs (SEN0N to SEN6N) enable the gen-
eration of 56 command codes. With 2 external
diodes all 64 commands are addressable. The
sense inputs have P-channel pull-up transistors so
that they are HIGH until they are pulled LOW by
connecting them to an output via a key depression
to initiate a code transmission. The codes for the
selected key are given in Table 1.
I.2 - Address Mode Input (ADRM)
The sub-system address and the transmission
mode are defined by connecting the ADRM input
to one or more driver outputs (DRV0N to DRV6N)
of the key matrix. If more than one driver is con-
nected to ADRM, they must be decoupled by di-
odes. This allows the definition of seven
sub-system addresses as shown in Table 2.
The ADRM input has switched pull-up and pull-
down loads. In the stand-by mode only the pull-
down device is active. Whether ADRM is open
(sub-system address 0) or connected to the driver
outputs, this input is LOW and will not cause un-
wanted dissipation. When the transmitter becomes
active by pressing a key, the pull-down device is
switched-off and the Pull-up device is switched-on,
so that the applied driver signals are sensed for the
decoding of the sub-system address and the mode
of transmission.
The arrangement of the sub-system address cod-
ing is such that only the driver DRVnN with the
highest number (n) defines the sub-system ad-
dress, e.g. in mode B, if drivers DRV2N and DRV4N
are connected to ADRM, only DRV4N will define
the sub-system address. This option can be used
in systems requiring more than one sub-system
address. The transmitter may be hard-wire for sub-
system address 2 by connecting DRV1N to ADRM.
If now DRV3N is added to ADRM by a key or a
switch, the transmitted sub-system address
changes to 4. A change of the sub-system will not
start a transmission.
I.3 - Remote Control Signal Output (REMO)
The REMO signal output stage is a push-pull type.
In the HIGH state, a bipolar emitter-follower allows
a high output current. The timing of the data output
format is listed in Figures 1 and 2.
3/8





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