TSOP344..
Vishay Semiconductors
IR Receiver Modules for Remote Control Systems
Description
The TSOP344.. - series are miniaturized receivers for
infrared remote control systems. PIN diode and
preamplifier are assembled on lead frame, the epoxy
package is designed as IR filter.
The demodulated output signal can directly be
decoded by a microprocessor. TSOP344.. is a stan-
dard IR remote control receiver series for 3 V supply
voltage, with excellent suppression of disturbance
signals.
This component has not been qualified according to
automotive specifications.
1
2
3
16672
Features
• Photo detector and preamplifier in one
package
• Internal filter for PCM frequency
e3
• Improved shielding against electrical field
disturbance
• TTL and CMOS compatibility
• Output active low
• Supply voltage: 2.7 V to 5.5 V
• Improved immunity against ambient light
• Lead (Pb)-free component
• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
Mechanical Data
Pinning:
1 = OUT, 2 = GND, 3 = V
S
Parts Table
Part
TSOP34430
TSOP34433
TSOP34436
TSOP34437
TSOP34438
TSOP34440
TSOP34456
Carrier Frequency
30 kHz
33 kHz
36 kHz
36.7 kHz
38 kHz
40 kHz
56 kHz
Block Diagram
16833
Application Circuit
17170
3
30 kΩ
V
S
1
Input
AGC
Band
Pass
Demo-
dulator
OUT
2
PIN
Control Circuit
GND
Circuit
Transmitter
TSOPxxxx
with
TSALxxxx
R
1
= 100
Ω
V
S
OUT
GND
V
O
C
1
=
4.7 µF
+
V
S
µC
GND
R
1
and C
1
recommended to suppress power supply
disturbances. The output
voltage
should not
be
hold continuously at a
voltage below V
O
= 2.0
V
by
the external circuit.
Document Number 82272
Rev. 1.3, 25-Jan-07
www.vishay.com
149
TSOP344..
Vishay Semiconductors
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Voltage
Supply Current
Output Voltage
Output Current
Junction Temperature
Storage Temperature Range
Operating Temperature Range
Power Consumption
Soldering Temperature
(T
amb
≤
85 °C)
t
≤
10 s, 1 mm from case
(Pin 3)
(Pin 3)
(Pin 1)
(Pin 1)
Test condition
Symbol
V
S
I
S
V
O
I
O
T
j
T
stg
T
amb
P
tot
T
sd
Value
- 0.3 to + 6.0
3
- 0.3 to
(V
S
+ 0.3)
10
100
- 25 to + 85
- 25 to + 85
30
260
Unit
V
mA
V
mA
°C
°C
°C
mW
°C
Electrical and Optical Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Supply Current (Pin 3)
Supply Voltage
Transmission Distance
E
v
= 0, test signal see fig. 1,
IR diode TSAL6200,
I
F
= 250 mA
I
OSL
= 0.5 mA, E
e
= 0.7 mW/m
2
,
test signal see fig. 1
V
S
= 3 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
V
S
= 3 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
V
S
= 5 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
V
S
= 5 V
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 1
Angle of half transmission
distance
Test condition
E
v
= 0, V
S
= 3 V
E
v
= 40 klx, sunlight
Symbol
I
SD
I
SH
V
S
d
2.7
35
Min
0.7
Typ.
1.2
1.3
5.5
Max
1.5
Unit
mA
mA
V
m
Output Voltage Low (Pin 1)
Minimum Irradiance
(30 - 40 kHz)
V
OSL
E
e min
0.2
250
0.4
mV
mW/m
2
Minimum Irradiance (56 kHz)
E
e min
0.3
0.5
mW/m
2
Minimum Irradiance
(30 - 40 kHz)
E
e min
0.35
0.5
mW/m
2
Minimum Irradiance (56 kHz)
E
e min
0.45
0.6
mW/m
2
Maximum Irradiance
Directivity
E
e max
ϕ
1/2
30
± 45
W/m
2
deg
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150
Document Number 82272
Rev. 1.3, 25-Jan-07
TSOP344..
Vishay Semiconductors
Typical Characteristics
T
amb
= 25 °C, unless otherwise specified
1.0
E
e
Optical Test Signal
T
on
,T
off
- Output Pulse
Width
(ms)
(IR diode TSAL6200, I
F
= 0.4 A, 30 pulses, f = f
0
, T = 10 ms)
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
1
= 950 nm,
optical test signal, fig. 3
Toff
Ton
t
t
pi
*
* t
pi
V
O
V
OH
V
OL
t
d1 )
T
10/fo is recommended for optimal function
16110
Output Signal
1)
2)
7/f
0
<
t
d
<
15/f
0
t
pi
- 5/f
0
<
t
po
<
t
pi
+ 6/f
0
t
po2 )
t
16909
10
100 1000 10000
E
e
- Irradiance (mW/m²)
Figure 1. Output Function
Figure 4. Output Pulse Diagram
1.0
0.9
t
po
- Output Pulse
Width
(ms)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
16908
1.2
Output Pulse
E
e min
/E
e
- Rel. Responsivity
1.0
0.8
0.6
0.4
0.2
0.0
f = f
0
± 5 %
f (3 dB) =
f
0
/10
Input Burst Duration
= 950 nm,
optical test signal, fig. 1
1
10
100 1000 10000
E
e
- Irradiance (mW/m²)
0.7
16925
0.9
1.1
1.3
f/f
0
- Relative Frequency
Figure 2. Pulse Length and Sensitivity in Dark Ambient
Figure 5. Frequency Dependence of Responsivity
E
e min
- Threshold Irradiance (mW/m
2
)
E
e
Optical Test Signal
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0.01
Ambient, = 950 nm
Correlation
with
ambient light sources:
10
W/m
2
1.4 klx (Std.illum.A, T= 2855 K)
10
W/m
2
8.2
klx (Daylight, T = 5900 K)
600 µs
T = 60 ms
Output Signal,
(see fig. 4)
600 µs
t
94
8134
V
O
V
OH
V
OL
T
on
T
off
t
16911
0.1
1
10
100
E - Ambient DC Irradiance (W/m
2
)
Figure 3. Output Function
Figure 6. Sensitivity in Bright Ambient
Document Number 82272
Rev. 1.3, 25-Jan-07
www.vishay.com
151
TSOP344..
Vishay Semiconductors
E
e min
- Threshold Irradiance (mW/m²)
E
e min
- Threshold Irradiance (mW/m²)
2.0
f = f
o
f = 10 kHz
1.0
0.6
0.5
0.4
0.3
0.2
0.1
Sensitivity in dark ambient
1.5
f = 1 kHz
0.5
f = 100 Hz
0.0
0.1
1
10
100
1000
V
sRMS
- AC
Voltage
on DC Supply
Voltage
(mV)
16912
0.0
- 30 - 15 0
15 30 45 60 75
16918
T
amb
- Ambient Temperature (°C)
90
Figure 7. Sensitivity vs. Supply Voltage Disturbances
Figure 10. Sensitivity vs. Ambient Temperature
1.2
E
e min
- Threshold Irradiance (mW/m²)
2.0
f(E) = f
0
1.6
1.2
0.8
0.4
0.0
0.0
0.4
0.8
1.2
1.6
2.0
E - Field Strength of Disturbance (kV/m)
S (
λ
)
rel
- Relative Spectral Sensitivity
1.0
0.8
0.6
0.4
0.2
0.0
750
850
950
1050
1150
94
8147
16919
λ
-
Wavelength
(nm)
Figure 8. Sensitivity vs. Electric Field Disturbances
Figure 11. Relative Spectral Sensitivity vs. Wavelength
0.4
1.0
0.9
E
e min
- Sensitivity (mW/m
2
)
110
17185
Max. Envelope Duty Cycle
0.3
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
V
S
- Supply
Voltage
(V)
0.2
0.1
f = 38 kHz, E
e
= 2 mW/m
2
0.0
10
30
50
70
90
16917
Burst Length (number of cycles/burst)
Figure 9. Max. Envelope Duty Cycle vs. Burstlength
Figure 12. Sensitivity vs. Supply Voltage
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152
Document Number 82272
Rev. 1.3, 25-Jan-07
TSOP344..
Vishay Semiconductors
When a disturbance signal is applied to the
TSOP344.. it can still receive the data signal. How-
ever the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP344.. are:
• DC light (e.g. from tungsten bulb or sunlight)
• Continuous signal at 38 kHz or at any other fre-
quency
• Signals from fluorescent lamps with electronic bal-
last with high or low modulation
(see Figure 14 or Figure 15).
0°
10°
20°
30°
40°
1.0
0.9
0.8
50°
60°
70°
0.7
80°
0.6
96 12223p2
0.4
0.2
0
0.2
0.4
0.6
d
rel
- Relative Transmission Distance
Figure 13. Directivity
The circuit of the TSOP344.. is designed so that unex-
pected output pulses due to noise or disturbance sig-
nals are avoided. A bandpass filter, an integrator
stage and an automatic gain control are used to sup-
press such disturbances.
The distinguishing mark between data signal and dis-
turbance signal are carrier frequency, burst length
and duty cycle.
The data signal should fulfill the following conditions:
• Carrier frequency should be close to center fre-
quency of the bandpass (e.g. 38 kHz).
• Burst length should be 10 cycles/burst or longer.
• After each burst which is between 10 cycles and 35
cycles a gap time of at least 14 cycles is necessary.
• For each burst which is longer than 0.9 ms a corre-
sponding gap time is necessary at some time in the
data stream. This gap time should be at least 7 times
longer than the burst.
• Up to 400 short bursts per second can be received
continuously.
Some examples for suitable data format are: NEC
Code, Toshiba Micom Format, Sharp Code, RC5
Code, R-2000 Code.
IR Signal
Suitable Data Format
IR Signal from fluorescent
lamp
with
low modulation
0
16920
5
10
15
20
Time (ms)
Figure 14. IR Signal from Fluorescent Lamp with low Modulation
IR Signal from fluorescent
lamp
with
high modulation
IR Signal
0
16921
10
10
15
20
Time (ms)
Figure 15. IR Signal from Fluorescent Lamp with high Modulation
Document Number 82272
Rev. 1.3, 25-Jan-07
www.vishay.com
153
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