EVERLIGHT IRM-3738S18 DATA SHEET

EVERLIGHT ELECTRONICS CO.,LTD.

Technical Data Sheet
Infrared Remote-Control Receiver Module

Features :

• Photo detector and preamplifier in one package

• Internal filter for PCM frequency

• Improved shielding against electrical field disturbance

• TTL and CMOS compatibility

• Output active low

• Low power consumption

• Improved immunity against ambient light

• Suitable min. burst length≧6 or 10 pulses/burst.

• The product itself will remain within RoHS compliant version.

• Pb free

IRM-3738S18

Descriptions

‧The device is a miniature type infrared remote control system

receiver which has been developed and designed by utilizing the
most updated IC technology. The PIN diode and preamplifier are
assembled on lead frame, the epoxy package is designed as an IR
filter. The demodulated output signal can directly be decoded by a
microprocessor.

Applications

1. Optical switch

2. Light detecting portion of remote control

․AV instruments such as Audio, TV, VCR, CD, MD, etc.
․Home appliances such as Air-conditioner, Fan , etc.
․The other equipments with wireless remote control.
․CATV set top boxes
․Multi-media Equipment

PART MATERIAL COLOR

Chip Silicon Black

Shell Epoxy Silver-white

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

Package Dimensions

IRM-3738S18

Notes: 1.All dimensions are in millimeters.

2.Tolerances unless dimensions ±0.3mm.

Absolute Maximum Ratings (Ta=25℃)

Parameter Symbol Rating Unit

Supply Voltage Vcc

Operating Temperature Topr

Storage Temperature Tstg

Soldering Temperature Tsol

OUT
Vcc

GND

0~6

-25 ~ +85

-25 ~ +85

260

Notice

V

℃

℃

℃

4mm from mold body

less than 10 seconds

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

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Recommended Operating Condition

Supply Voltage Rating: Vcc 2.7V to 5.5V

Electro-Optical Characteristics (Ta=25℃, and Vcc=3.0V)

IRM-3738S18

Parameter Symbol MIN. TYP. MAX. Unit

Consumption Current Icc
B.P.F Center Frequency Fo
Peak Wavelength

Reception Distance

Half Angle(Horizontal)

Half Angle(Vertical)
High Level Pulse Width TH

Low Level Pulse Width TL

High Level Output Voltage VH

Low Level Output Voltage VL

λ

L0

L45

Θ

Θ

Condition

0.7 0.9 1.2

--- 38 ---

p

h

v

--- 940 --­8 --- ---

5 --- ---

--- 45 ---

--- 45 ---

400 --- 800
400 --- 800

2.5 --- --- V

--- 0.2 0.5 V

mA No signal input

KHz

nm

m

deg

deg

μs

μs

At the ray axis

*1

At the ray axis

*2

*1:The ray receiving surface at a vertex and relation to the ray axis in the range of θ= 0° and θ=45°.
*2:A range from 30cm to the arrival distance. Average value of 50 pulses.

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

IRM-3738S18

Test Method：

The specified electro-optical characteristics is satisfied under the following
Conditions at the controllable distance.

cMeasurement place
A place that is nothing of extreme light reflected in the room.
dExternal light
Project the light of ordinary white fluorescent lamps which are not high
Frequency lamps and must be less then 10 Lux at the module surface.
(Ee≦10Lux)
eStandard transmitter
A transmitter whose output is so adjusted as to Vo=400mVp-p and the output
Wave form shown in Fig.-1.According to the measurement method shown in
Fig.-2 the standard transmitter is specified.
However , the infrared photodiode to be used for the transmitter should be
λp=940nm,∆λ=50nm. Also, photodiode is used of PD438B(Vr=5V).
fMeasuring system
According to the measuring system shown in Fig.-3

Fig.-1 Transmitter Wave Form D.U.T output Pulse

IR TANSMITTER

OUTPUT WAVE FORM

Carrier frequency is adjusted to
center frequency of each product.

Duty=0.5

OUTPUT PULSE
OF DEVICE

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

r

r

µ

IRM-3738S18

Fig.-2 Measuring Method Fig.-3 Measuring System

Standard Transmitter

Block Diagram：

20cm

10k

+5.0± 0.1V

10uF

k
0
0
1

Oscilloscope

Vout

Standard Transmitter

Vs

L: Transmission Distance

θ

θ

D.U.T

θ: Angle Of Horizontal & Vertical Direction

OUT

GND

Vcc

Vout

Input CGA & filte

Demodulato

Oscillator AGC/ATC & digital control

Carrier frequency f0

Modulated IR signal

min 6/10 pulses

GND

Application Circuit：

RC Filter should be connected closely between Vcc pin and GND pin.

OUTIN

C

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

Typical Electro-Optical Characteristics Curves

IRM-3738S18

Fig.-4 Relative Spectral Sensitivity vs.

Wavelength

Fig.-5 Relative Transmission Distance vs.

Direction

θ

Fig.-6 Output Pulse Length vs. Arrival Distance Fig.-7 Arrival Distance vs. Supply Voltage

17.5

10.5

7.0

3.5

Transmission Distance Lc (m)

4.4

3.32.703.0

3.83.5 4.1 5.0

Supply Voltage Vcc (V)

4.7

5.3

5.5

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

IRM-3738S18

Typical Electro-Optical Characteristics Curves

Fig.-8 Relative Transmission Distance

vs. Center Carrier Frequency

Fig.-9 Arrival Distance vs. Ambient Temperature

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

Reliability Test Item And Condition

The reliability of products shall be satisfied with items listed below.
Confidence level：90%

LTPD：10%

IRM-3738S18

Test Items Test Conditions

Temperature cycle

High temperature test

Low temperature
storage

High temperature
High humidity

Solder heat

1 cycle -25℃ +85℃
(30min)(5min)(30min)

300 cycle test

Temp: +85℃
Vcc:5V

1000hrs
Temp: -25℃

1000hrs

Ta: 85℃,RH:85%
1000hrs

Temp: 260±5℃ 10sec
4mm From the bottom of the package.

Failure Judgement

Criteria

L0≦ L×0.8
L45≦ L×0.8

L: Lower
specification limit

Samples(n)

Defective(c)

n=22,c=0

n=22,c=0

n=22,c=0

n=22,c=0

n=22,c=0

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu

EVERLIGHT ELECTRONICS CO.,LTD.

Packing Quantity Specification

1. 1000PCS/1Box

2. 10Boxes/1Carton

Label Form Specification

RoHS

IRM-3738S18

IRM-3738S18

CPN: Customer’s Production Number
P/N : Production Number
QTY: Packing Quantity
CAT: Ranks
HUE: Peak Wavelength
REF: Reference
LOT No: Lot Number
MADE IN TAIWAN: Production Place

Notes

1. Above specification may be changed without notice. EVERLIGHT will reserve authority on

material change for above specification.

2. When using this product, please observe the absolute maximum ratings and the instructions

for using outlined in these specification sheets. EVERLIGHT assumes no responsibility for
any damage resulting from use of the product which does not comply with the absolute
maximum ratings and the instructions included in these specification sheets.

3. These specification sheets include materials protected under copyright of EVERLIGHT

corporation. Please don’t reproduce or cause anyone to reproduce them without
EVERLIGHT’s consent.

EVERLIGHT ELECTRONICS CO., LTD. Tel: [phone]
Office: No 25, Lane 76, Sec 3, Chung Yang Rd, Fax: [phone]
Tucheng, Taipei 236, Taiwan, R.O.C http:\\www.everlight.com

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Device No：SZDMO-037-004 Prepared date：07-28-2005 Prepared by：Hao Liu