Infrared Remote Control
Receiver Module
LTM-97 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-97 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-97AS-XX
LTM-97AT-XX
LTM-97BS-XX
LTM-97BT-XX
LTM-97CS-XX
LTM-97CT-XX
LTM-97DT-XX
LTM-97ES-XX
LTM-97ET-XX
LTM-97DS-XX
XX: Carrier frequencies for 33, 36, 38, 40, 56.8 kHz
Package Dimensions
A. LTM-97AS-XX
D
E
T
E
L
O
S
B
O
Detecting
Window
Side
Top
Top
Top
Top
Top
Side
Side
Side
Side
Package
Dimension
A
B
3
Pin Out Function
2
Vcc
Vcc
1
Vout
Vout
Gnd
Gnd
Vcc
Gnd
Gnd
Vcc
C
D
C
D
C
D
C
D
Vout
Vcc
Vout
Vout
Gnd
B. LTM-97AT-XX
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INFRARED
PRODUCTS
C. LTM-97BS/CS/DS/ES-XX
D. LTM-97BT/CT/DT/ET-XX
Note: 1. All dimensions are in millimeters (inches).
0.25mm (0.01") unless otherwise noted.
2. Tolerance is
3. XX: Frequency
Special Forming (Option)
We provide lead forming service if it's necessary.
"*" Dimension can be changed according to customer's requirement
A. LTM-97AS-XX#
B. LTM-97AT-XX#
D
E
T
E
L
O
S
B
O
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C. LTM-97BS/CS/DS/ES-XX#
D. LTM-97BT/ CT/DT/ET -XX#
E. LTM-97XS-XXF
Note: 1. All dimensions are in millimeters (inches).
0.25mm (0.01") unless otherwise noted.
2. Tolerance is
3. XX: Frequency
D
E
T
E
L
O
S
B
O
F. LTM-97XT-XXH
Parameter
Symbol
Vcc
Topr
Tstg
Tsd
Absolute Maximum Ratings (Ta=25 )
Rating
6.0
-20 ~~ +70
-25 ~~ +85
260
Unit
V
Supply Voltage
Operating Temperature
Storage Temperature
Soldering Temperature
Recommended Operating Condition
Parameter
Supply Voltage
Symbol
Vcc
Min
4.7
Max
5.3
Unit
V
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INFRARED
PRODUCTS
Block Diagram
Application Circuit
Electrical Characteristics
Item
Current Consumption
Wave Length of the Max.
Sensitivity
Reception Distance
D
E
T
E
L
O
S
B
O
Symbol
I
CC
Conditions
Min
1.1
Rating
Typ
Max
2.5
Unit
mA
nm
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
m
8
6
Low Level Output Voltage
High Level Output Voltage
V
OL
V
OH
Specified by the output tWL
period within a range from
5cm to the reception distance
4.5
0.5
V
V
Low Level Pulse Width
t
W L
400
600
800
S
High Level Pulse Width
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
800
S
Noise Suppression
NQ
0
Pulse
Note: Detailed condition please refer to measuring method.
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Measuring Method
A. Reception distance measurement
Fig. 1 Reception distance measuring condition
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.
INFRARED
PRODUCTS
D
E
T
E
L
O
S
B
O
Fig. 2 Output wave form
Fig. 3 Measuring method
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