Infrared Remote Control
Receiver Module
LTM-99 Series
Features
Compact package
High immunity from ambient light
Good performance against electric field disturbance
5 volt supply voltage and low power consumption
Pin out can be changed according to customer's requirement
Description
The LTM-99 series are miniaturized receivers for infrared remote control systems. It is a single unit type module which
incorporates a PIN diode and a receiving preamplifier IC. The demodulated output signal can directly be decoded by
a microprocessor. It has excellent sensitivity and reliable function even in disturbed working environment.
Device No
Device No.
LTM-991-XXS
LTM-991-XXF
LTM-991-XXT
LTM-991-XXH
LTM-992-XXS
LTM-992-XXF
LTM-992-XXT
LTM-992-XXH
XX: Carrier frequencies for 33, 36, 38, 40, 56.8 kH
Package Dimensions
A. LTM-99X-XXS
D
E
T
E
L
O
S
B
O
Detecting
Window
Side
Side
Top
Top
Package
Dimension
A
B
3
Pin Out Function
2
1
C
D
Vout
Gnd
Vcc
Side
Side
Top
Top
A
B
C
D
Vout
Vcc
Gnd
B. LTM-99X-XXF
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INFRARED
PRODUCTS
C. LTM-99X-XXT
D. LTM-99X-XXH
Note : 1. All dimensions are in millimeters (inches).
0.25mm (0.01") unless otherwise noted.
2. Tolerance is
3. XX: Frequency
Absolute Maximum Ratings (Ta=25 )
Parameter
Supply Voltage
Operating Temperature
Storage Temperature
Soldering Temperature
Recommended Operating Condition
Parameter
Supply Voltage
Block Diagram
D
E
T
E
L
O
S
B
O
Symbol
Vcc
Topr
Tstg
Tsd
Rating
6.0
Unit
V
-20 ~~ +70
-25 ~~ +85
260
Symbol
Vcc
Min
4.7
Max
5.3
Unit
V
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Application Circuit
Electrical Characteristics
Item
Current Consumption
Wave Length of the Max.
Sensitivity
Reception Distance
Low Level Output Voltage
High Level Output Voltage
Low Level Pulse Width
High Level Pulse Width
Noise Suppression
Note: Detailed condition please refer to measuring method.
D
E
T
E
L
O
S
B
O
Min
1.1
I
CC
No signal input, Vcc=5V
Smax
940
At the ray axis
10
L
The ray receiving surface at a
vertex and in relation to the ray
axis:
a: in the range of 30 cone
b: in the range of 45 cone
8
6
V
OL
V
OH
4.5
t
W L
Specified by the output tWL
period within a range from
5cm to the reception distance
400
600
t
W H
Specified by the output tWH
period within a range from
5cm to the reception distance
25-50
No outside light
400
600
NQ
Symbol
Conditions
Rating
Typ
Max
2.5
Unit
mA
nm
INFRARED
PRODUCTS
m
0.5
V
V
800
S
800
S
0
Pulse
Measuring Method
A. Reception distance measurement
Fig. 1 Reception distance measuring condition
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B. Standard transmitter
The transmitter whose output is adjusted up become Vo=400m Vp-p by output waveform as show in Fig. 2 and the
measuring method as shown in Fig. 3 is specified as the standard transmitter. However, the infrared diode to be used
for the transmitter should be
p=940nm,
=50nm.
C. Pulse width measurement
The following wave forms are transmitter output and our receiver module's output.
D
E
T
E
L
O
S
B
O
Fig. 2 Output wave form
Fig. 3 Measuring method
Fig. 4 Output pulse
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