TSOP21..LL1F
Vishay Semiconductors
IR Receiver Modules for Remote Control Systems
Description
The TSOP21..LL1F - series are miniaturized receiv-
ers 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. The main benefit is the
reliable function even in disturbed ambient and the
protection against uncontrolled output pulses.
1
2
3
16644
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
• Low power consumption
• High immunity against ambient light
• Lead (Pb)-free component
• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
Special Features
• Enhanced data rate of 4000 bit/s
• Suitable burst length
≥
6 cycles/burst
• Enhanced suppression of disturbance signals by
special filtering
Parts Table
Part
TSOP2130LL1F
TSOP2133LL1F
TSOP2136LL1F
TSOP2137LL1F
TSOP2138LL1F
TSOP2140LL1F
TSOP2156LL1F
Carrier Frequency
30 kHz
33 kHz
36 kHz
36.7 kHz
38 kHz
40 kHz
56 kHz
Block Diagram
16834
Application Circuit
16842
2
25 kΩ
Input
PIN
AGC
Band
Pass
Demo-
dulator
V
S
Circuit
Transmitter
TSOPxxxx
with
TSALxxxx
R
1
= 100
Ω
V
S
C
1
=
4.7 µF
µC
V
O
GND
+ V
S
1
OUT
OUT
GND
3
Control Circuit
GND
R
1
and C
1
recommended to suppress power supply
disturbances.
The output
voltage
should not
be
hold continuously a
a
voltage below
V
O =
3.3 V
b
y the external circuit.
Document Number 81383
Rev. 1.0, 28-Jul-06
www.vishay.com
1
TSOP21..LL1F
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 2)
(Pin 2)
(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
5
- 0.3 to + 6.0
5
100
- 25 to + 85
- 25 to + 85
50
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 2)
Supply
Voltage
(Pin 2)
Transmission Distance
E
v
= 0, test signal see fig. 3,
IR diode TSAL6200,
I
F
= 250 mA
I
OL
= 0.5 mA,E
e
= 0.7 mW/m
2
,
f = f
o
, test signal see fig. 1
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 3
Pulse width tolerance:
t
pi
- 5/f
o
< t
po
< t
pi
+ 6/f
o
,
test signal see fig. 3
Test signal see fig. 1
Angle of half transmission
distance
Test condition
V
S
= 5
V,
E
v
= 0
V
S
= 5
V,
E
v
= 40 klx, sunlight
Symbol
I
SD
I
SH
V
S
d
4.5
35
Min
0.8
Typ.
1.1
1.4
5.5
Max
1.5
Unit
mA
mA
V
m
Output
Voltage
Low (Pin 1)
Minimum Irradiance
(30 - 40 kHz)
Minimum Irradiance (56 kHz)
V
OL
E
e min
0.2
250
0.4
mV
mW/m
2
E
e min
0.3
0.5
mW/m
2
Maximum Irradiance
Directivity
E
e max
ϕ
1/2
30
± 45
W/m
2
deg
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2
Document Number 81383
Rev. 1.0, 28-Jul-06
TSOP21..LL1F
Vishay Semiconductors
Typical Characteristics
T
amb
= 25 °C, unless otherwise specified
E
e
Optical Test Signal
(IR diode TSAL6200, I
F
= 0.4 A,
N
= 6 pulses,
f = f
0
, T = 10 ms)
T
on
,T
off
- Output Pulse
Width
(ms)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0.1
1.0
= 950 nm,
optical test signal, fig. 3
Toff
Ton
t
pi
*)
T
6/fo is recommended for optimal function
t
*) t
pi
Output Signal
V
O
V
OH
V
OL
t
d1 )
1)
2)
14337
3/f
0
< t
d
< 9/f
0
t
pi
- 4/f
0
< t
po
< t
pi
+ 6/f
0
t
t
po2 )
10.0
100.0 1000.0 10000.0
16910
E
e
- Irradiance (mW/m
2
)
Figure 1. Output Function
Figure 4. Output Pulse Diagram
0.35
t
po
- Output Pulse
Width
(ms)
E
e min
/E
e
- Rel. Responsivity
0.30
Output Pulse
0.25
0.20
0.15
0.10
0.05
0.00
0.1
16907
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.7
16926
Input Burst Duration
= 950 nm,
optical test signal, fig.1
f = f
0
± 5 %
f (3 dB) = f
0
/7
0.9
1.1
1.3
1.0
10.0
100.0 1000.0 10000.0
E
e
- Irradiance (mW/m²)
f/f
0
- Relative Frequency
Figure 2. Pulse Length and Sensitivity in Dark Ambient
Figure 5. Frequency Dependence of Responsivity
E
e
Optical Test Signal
4.0
E
e min
- Threshold Irradiance (mW/m
2
)
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
0.10
1.00
10.00
100.00
E - Ambient DC Irradiance (W/m
2
)
Figure 3. Output Function
Figure 6. Sensitivity in Bright Ambient
Document Number 81383
Rev. 1.0, 28-Jul-06
www.vishay.com
3
TSOP21..LL1F
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
1.0
10.0
100.0
1000.0
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
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
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
750
850
950
1050
1150
94
8147
18998
λ
-
Wavelength
(nm)
Figure 8. Sensitivity vs. Electric Field Disturbances
Figure 11. Relative Spectral Sensitivity vs. Wavelength
1.0
0.9
Max. Envelope Duty Cycle
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
0
16914
0°
10°
20°
30°
40°
1.0
0.9
0.8
f = 38 kHz, E
e
= 2
mW/m
2
0.7
50°
60°
70°
80°
20
40
60
80
100 120
Burst Length (number of cycles/burst)
0.6
96 12223p2
0.4 0.2
0
0.2
0.4 0.6
d
rel
- Relative Transmission Distance
Figure 9. Max. Envelope Duty Cycle vs. Burstlength
Figure 12. Directivity
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Document Number 81383
Rev. 1.0, 28-Jul-06
TSOP21..LL1F
Vishay Semiconductors
Suitable Data Format
The circuit of the TSOP21..LL1F is designed in that
way that unexpected output pulses due to noise or
disturbance signals are avoided. A bandpass filter, an
integrator stage and an automatic gain control are
used to suppress 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 6 cycles/burst or longer.
• After each burst which is between 6 cycles and 70
cycles a gap time of at least 10 cycles is necessary.
• For each burst which is longer than 1.8 ms a corre-
sponding gap time is necessary at some time in the
data stream. This gap time should have at least same
length as the burst.
• Up to 2200 short bursts per second can be received
continuously.
Some examples for suitable data format are: NEC
Code, Toshiba Micom Format, Sharp Code, RC5
Code, RC6 Code, RCMM Code, R-2000 Code,
RECS-80 Code.
When a disturbance signal is applied to the
TSOP21..LL1F it can still receive the data signal.
However the sensitivity is reduced to that level that no
unexpected pulses will occur.
Some examples for such disturbance signals which
are suppressed by the TSOP21..LL1F 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 (an example of the signal modulation is in the fig-
ure below).
IR Signal
IR Signal from fluorescent
lamp
with
low modulation
0
16920
5
10
Time (ms)
15
20
Figure 13. IR Signal from Fluorescent Lamp with low Modulation
Document Number 81383
Rev. 1.0, 28-Jul-06
www.vishay.com
5
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