GP1U78R Series
GP1U78R Series
IR Detecting Unit For
Remote Control
■ Features
1. Less sensitive to fluorescent lamp driven
by inverter.
2. Improved anti-electromagnetic noise char acteristic by mesh type light detecting
window.
3. Various B.P.F (Band Pass Filter) frequency
■ Applications
1. TVs
2. VCRs
3. CATV set top boxes
4. BS receivers
■ Absolute Maximum Ratings
Parameter Symbol Rating Unit
Supply voltage V
*1
Operating temperature T
Storage temperature S
*2
Soldering temperature T
*1 No dew formation
*2 For 5 seconds
CC
opr
stg
sol
(
Ta = 25˚C
0 to 6.3 V
- 10 to + 70
- 20 to + 70
260 ˚C
■ Outline Dimensions
0.5-0.3
+
0.5
15
±
7.5
❈1
❈1
±
0.5
3.65
+
0.5
12.6
-
0.3
1.6
22
(
Unit : mm
14.21.4
3.9 2.4
3 - φ 0.8
Recommended drilling as viewed
from the soldering face
15.6
3.6
123
2.54
* Tolerance :±0.3mm
❈ 1 Detector center
2.54
123
1.7
Rib
1 Vout
2 Vcc
3 GND
)
3.3
)
˚C
˚C
■ Recommended Operations Conditions
Parameter Symbol Value Unit
Supply voltage V
CC
■ Electrical Characteristics
Parameter Symbol MIN. TYP.
Dissipation current I
High level output voltage V
Low level output voltage V
High level pulse width T
Low level pulse width T
B. P. F. center frequency f
*3 The burst wave as shown in the following figure shall be transmitted by the transmitter shown in Fig. 1.
*4 Diversified models with a different B. P. F. frequency, as shown in a separate table, are also available.
“ In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that occur in equipment using any of SHARP's devices, shown in catalogs,
data books, etc. Contact SHARP in order to obtain the latest version of the device specification sheets before using any SHARP's device.”
4.7 to 5.3 V
CC
OH
OL
o
(
Ta= 25˚C, V
Conditions
No input light
--
VCC- 0.5
1
2
*3
-
-400 400 -
-
-
*4
40
MAX. Unit
= +5V
CC
5.0 mA
-V
0.45 V
800
800
µs
- kHz
)
600µ s600µ s
The value of fO is shown in a separate table.
Duty 50%
■ Model Line-up
Model No. B.P.F. frequency Unit
GP1U78R 40
GP1U780R 36
GP1U781R 38
GP1U782R 36.7
GP1U783R 32.75
GP1U787R
56.8
■ Internal Block Diagram
GP1U78R Series
kHz
Amp
Vout
B.P.F.Limiter
ComparatorIntegratorDemodulator
Vcc
GND
■ Performance
Using the transmitter shown in Fig. 1, the output signal of the light detecting unit is good enough
to meet the following items in the standard optical system in Fig. 2.
(1)
Linear reception distance characteristics
When L= 0.2 to 6.5m, Ee<10 lx and φ = 0˚ in Fig. 2, the output signal shall meet the electrical
characteristcs in the attached list.
(2)
Sensitivity angle reception distance characteristics
When L= 0.2 to 4.5m, Ee<10 lx and φ <=30˚ in Fig. 2, the output signal shall meet the electrical
characteristics in the attached list.
(3)
Anti outer peripheral light reception distance characteristics
When L= 0.2 to 3m, Ee<= 300 lx and φ = 0˚ in Fig. 2, the output signal shall meet the electrical
characteristics in the attached list.
GP1U78R Series
20cm
Transmitter (GL521 used
Duty 50 %
Center frequency (fo
depends on the attached
model list.
)
)
PD49PI
10kΩ
10kΩ
+ 5V
10µ F
Vout
Oscilloscope
Fig. 1. Transmitter
In the above figure, the transmitter should be set so that the output V out can be 40mV
However, the PD49PI to be used here should be of the short-circuit current I
= 2.6 µ A at EV=
SC
100 lx.
(
E
is an illuminance by CIE standard light source A (tungsten lamp).
V
Reception distance : L
)
Light detector face
illuminance : Ee
φ
φ
Vout
.
PP
Transmitter
(
φ indicates horizontal and
vertical directions.
)
Fig. 2. Standard optical system
■ Precautions for Use
(1)
Use the light emitting unit (remote control transmitter), in consideration of performance,
characteristics and operating condition of light emitting device and the characteristics of
the light detecting unit.
(2)
Pay attention to a malfunction of the light detecting unit when the surface is stained with
dust and refuse. Care must be taken not to touch the light detector surface. If it should be
dirty, wipe off with soft cloth so as to prevent scratch. In case some solvents are required,
use metyl alcohol, ethyl alcohol or isoprophyl alcohol. Also, protect the light detecting unit
against flux and others.
(3)
The shield case shall be grounded on PWB pattern.
(4)
Do not apply unnecessary force to the terminals and case form outside.
(5)
Do not push the light detector surface (photodiode) from outside.
(6)
To avoid the electorstatic breakdown of IC, handle the unit under the condition of ground-
ing with human body, soldering iron, etc.
(7)
In case of adopting the infrared light detecting unit for the wireless remote control, use it
in accordance with the transmission scheme and the signal format recommended in“ Countermeasures for malfunction prevention of home appliances with infrared remote control”
issued form Japan Association of Electrical Home Appliances (AEHA) in July 1987.
(8)
As for other general cautions, refer to the chapter “Precautions for Use”(Page 78 to 93).
GP1U78R Series
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