SGS Thomson Microelectronics STV3012 Datasheet
FOR AUDIO AND VIDEO A PPLICATIONS
.
TWO TIMING AND DATA FORMAT MODES
.
7 SUB-SYSTEM ADDR ESSES
.
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 RE MO T E OUTPUT
AT V
.
VERY LOW STA ND-B Y CU RRENT (< 2µA)
.
1mA OPERATIONAL CURRENT AT 6V SUPPLY
.
CERAMIC RESONATOR CONTROLLED
FREQUENCY (typ. 450kHz)
.
MODULATED TRANSMISSION
.
SUPPLY VOLTA G E RANGE 2V TO 6.5V
.
LOW NUMBER OF EXTERNAL COMPONENTS
= 3V (-IOH = 80mA)
DD
STV3012
REMOTE CONT R OL TRANSMITTER
PRELIMINARY DATA
DIP20
(Plastic Package)
ORDER CODE : STV3012
PIN CONNECTIONS
REMO
SEN6N
SEN5N
SEN4N
SEN3N
SEN2N
DESCRIPTION
The STV3012 is a general purpose infrared rem ote
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-system code may be selected by a press button, a
slider switch or hard wired. T wo different timing and
data format modes are available.
March 1993
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
SEN1N
SEN0N
ADRM
V
1
2
3
4
5
6
7
8
9
10
SS
V
20
19
18
17
16
15
14
13
12
11
DD
DRV6N
DRV5N
DRV 4N
DRV 3N
DRV 2N
DRV1N
DRV0N
OSCO
OSCI
3012-01.EPS
1/8
STV3012
BLOCK DIAG RAM
OSCO
OSCI
SEN6N
SEN5N
SEN4N
SEN3N
SEN2N
SEN1N
SEN0N
REMO
12
OSCILLATOR
2
3
4
5
6
7
8
1
ENCODER
KEYBOARD
REMOTE
DIVIDER
LATCHES
ADDRESS
PARALLEL
/SERIAL
CONVERTER
MASTER
CLEAR
SYST.
CONTR
DRIVER
KEYBOARD
DECODER
20
1011
9
19
18
17
16
15
14
13
V
DD
V
SS
ADRM
DRV6N
DRV5N
DRV4N
DRV3N
DRV2N
DRV1N
DRV0N
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
- I
V
DD
V
V
O
± I
(REMO)
P
tot
T
stg
T
oper
Supply Voltage - 0.3, 7.0 V
Input Voltage - 0.3, VDD + 0.3 V
I
Output Voltage - 0.3, VDD + 0.3 V
D.C. Current into any input or output 10 mA
Peak REMO Output Current during 10µs, duty factor = 1%
Power Dissipation per package for T
= - 20 to + 70oC 200 mW
amb
300 mA
Storage Temperature - 55, + 125
Operating Ambient Temperature -20, + 70
3012-02.EPS
o
C
o
C
3012-01.TBL
ELECTRICAL CHARACTERISTICS
V
= 0V, TA = 25oC (unless otherwise specified)
SS
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V
I
f
OSC
KEYBOARD MATRIX - Inputs SEN0N to SEN6N
V
V
- I
KEYBOARD MATRIX - Outputs DRV0N to DRV6N
V
2/8
Supply Voltage TA = 0 to + 70oC26.5V
DD
Supply Current • Active f
DD
REMO Output unload VDD = 6V
• Inactive (stand-by mode) V
= 455kHz VDD = 3V
OSC
0.25
1.0
= 6V 2
DD
0.5
2
Oscill. Frequency VDD = 2 to 6.5V (ceramic resonator) 350 600 kHz
Input Voltage Low VDD = 2 to 6.5V 0.3 x V
IL
Input Voltage High VDD = 2 to 6.5V 0.7 x V
IH
Input Current VDD = 2V, VI = 0V
I
Input Leakage Current VDD = 6.5V, VI = V
I
I
Output Voltage "ON" VDD = 2V, IO = 0.1mA
OL
I
Output Current "OFF" VDD = 6.5V, VO = 6.5V 10
O
= 6.5V, VI = 0V
V
DD
DD
VDD = 6.5V, IO = 1.0mA
DD
10
100
DD
100
600
1
0.3
0.6
mA
mA
µA
V
V
µA
µA
µA
V
V
µA
3012-02.TBL
STV3012
ELECTRICAL CHARACTERISTICS
T
= 25oC, unless otherwise specified
amb
Symbol Parameter Test Conditions Min. Typ. Max. Unit
CONTROL INPUT ADRM
Input Voltage Low 0.3 x V
V
IL
V
Input Voltage High 0.7 x V
IH
I
Input Current Low
IL
(switched P and N
channel pull-up/pull down)
I
Input Current High
IH
(switched P and N
channel pull-up/pull down)
DATA OUTPUT REMO
- I
OSCILLATOR
V
V
Output Current High VDD = 2.5V, VOH = 0.8V, TA = 70oC
OH
I
Output Current Low VDD = 2V, VOL = 0.4V
OL
t
Pulse Length VDD = 6.5V, Oscill. Stopped 1 msec
OH
Input Current OSCI at V
I
I
Output Voltage high VDD = 6.5V, - IOH = 0.1mA VDD - 0.8 V
OH
Output Voltage Low VDD = 6.5V, IOL = 0.1mA 0.7 V
OL
Pull-up Act. Oper. Condition, VIN = V
Pull-down Act. Stand-by Cond.,VIN = V
VDD = 2.5V, VOH = 0.8V, TA = 25oC
V
DD
VDD = 6.5V, VOL = 0.4V
VDD = 2V
VDD = 6.5V
VDD = 2V
VDD = 6.5V
= 6.5V, VOH = 5V
DD
VDD = 2V
= 6.5V 5
V
DD
SS
DD
DD
-10
-100
10
100
70
80
80
0.6
0.6
DD
-100
-600
100
600
5
7
V
V
µA
µA
µA
µA
mA
mA
mA
mA
mA
µA
µA
3012-03.TBL
I - INPUTS AND OUTP UT S
I.1 - Key Matrix Inputs and Outp uts (DRV 0N to
DRV6N and SEN0N to SEN6N)
The transmitter k eyboard is arranged as a scanned
matrix. The matrix consists of 7 driver ouputs a nd
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 generation 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 cod es 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 connected to ADRM, they must be decoupled by diodes. This allows the definition of seven
sub-system address es as shown in Table 2.
The ADRM input has switched pull-up and pulldown 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 unwanted dissipation. W hen 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-syst em address and the mode
of transmission.
The arrangement of the sub-system address coding is such that only the driver DRVnN with the
highest number (n) defines the sub-system address, e.g. in mode B, if drivers DRV 2N and DRV4N
are connected to ADRM, only DRV4N will define
the sub-system addre ss. This option can be used
in systems requiring more than one sub-system
address. The transmitt er may be hard-wir e for subsystem 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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