EVERLIGHT IRM-3736T, IRM-3738T, IRM-3740T, IRM-3756T DATA SHEET

EVERLIGHT ELECTRONICS CO.,LTD.

Technical Data Sheet
Infrared Remote-control Receiver Module

IRM-37xxT SERIES

Features

• Photo detector and preamplifier in one package

• Internal filter for PCM frequency

• Improved inner shielding against electrical field disturbance

• TTL and CMOS compatibility

• Low power consumption

• Improved immunity against ambient light

• Suitable burst length 10 cycles/burst≧

• Pb free

• BiCMOS manufacture IC ; ESD HBM>4000V ; MM>250V

• The product itself will remain within RoHS compliant version.

Descriptions

The IRM-37xxT is miniaturized receivers 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.IRM-37xxT is the standard IR remote control receiver
series, supporting all major transmission codes.

Applications

․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

Compound Epoxy Black

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Package Dimensions

IRM-37xxT SERIES

Unit:mm

Notes: 1.All dimensions are in millimeters.

2.Tolerances unless dimensions ±0.3mm.

Available Types For Different Carrier Frequencies

Type Carrier Frequencies (Typ)

IRM-3736T 36 kHz

IRM-3738T 38 kHz

IRM-3740T 40 kHz

IRM-3756T 56 kHz

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Absolute Maximum Ratings (Ta=25℃)

Parameter Symbol Rating Unit

Supply Voltage Vcc

Operating Temperature Topr

Storage Temperature Tstg

Soldering Temperature Tsol

0~6

-25 ~ +80

-40 ~ +85

260

Recommended Operating Condition

Supply Voltage Rating: Vcc 2.7V to 5.5V

Electro-Optical Characteristics (Ta=25℃, and Vcc=3V)

Parameter Symbol MIN. TYP. MAX. Unit

IRM-37xxT SERIES

Notice

V

℃

℃

℃

4mm from mold body

less than 10 seconds

Condition

Consumption Current Icc

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

Notes:

*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.

λp

L0

L45

Θh

Θv

--- 1.0 1.2

--- 940 --­14 --- ---

6 --- ---

--- 45 ---

--- 45 ---

400 --- 800
400 --- 800

2.7 --- ---

--- --- 0.5

mA

nm

m

deg

deg

μs

μs

V

V

No signal input

At the ray axis

*1

At the ray axis

*2

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IRM-37xxT SERIES

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).
(Standard light / Light source temperature 2856°K).
fMeasuring system
According to the measuring system shown in Fig.-3

Block Diagram：

Carrier frequency f0

Modulated IR signal

min 10 pulses

Vs

Input CGA & filter Demodulator

Oscillator AGC/ATC & digital control

GND

OUT IN

µC

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20cm

IRM-37xxT SERIES

Application Circuit：

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

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

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

Standard Transmitter

k
0
0
1

10k

+5.0± 0.1V

10uF

Oscilloscope

Vout

Standard Transmitter

L: Transmission Distance

θ

θ

D.U.T

θ: Angle Of Horizontal & Vertical Direction

Vcc

OUT

Vout

GND

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IRM-37xxT SERIES

The Notice of Application:

Transmission of remote control signal consist of four parts: Encode Part, IR Transmitter Source,
IRM device, Decode Part

1. When IRM-37xxT SERIES code select frequency, it need to well understand the center system of
encode part.

2. Strong or weak light of IR Transmitter can affect distance of transmission.

3. When using IRM-37xxT SERIES device, it requires the composition of code pattern to reach the
demand as follows:

Minimum t

( number of pulses per burst)

10 pulses 14 pulses 25 msec

4. It needs to ensure the translation range of decode part if it is applied to the pulse-width range.

If the above items hardly assure of its application, it’ll cause NG(no good) message from the edge
of signal.

burst

Minimum t

( number of pulses

between two burst)

burst_gap

Minimum t

pause

IRM-37xxT SERIES Code Property:

Data format Data format

NEC O Sony 12 Bit O

RC5 _ Philips O Sony 15 Bit X

RC6 _ Philips O Sony 20 Bit X

RCA _ Thomson X Matsushita O

Toshiba O Mitsubishi O

Sharp O Zenith O

JVC O

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High data rate

X

(4000 bit/s)

EVERLIGHT ELECTRONICS CO.,LTD.

Typical Electro-Optical Characteristics Curves

IRM-37xxT SERIES

Fig.-4 Relative Spectral Sensitivity vs.

Wavelength

Fig.-5 Relative Transmission Distance vs.

Direction

80

60

40

20

Relative Transmission Distance (%)

0

-60

-40 020 6040

-20

Angle (deg)

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)

Output Pulse Width TWL (µsec)

2010

481214

6

16

Transmission Distance Lc (m)

0

2.7

3.33.0 3.5

3.8

Supply Voltage Vcc (V)

4.1

4.4

4.7

5.0 5.3

5.5

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IRM-37xxT SERIES

Typical Electro-Optical Characteristics Curves

Fig.-8 Relative Transmission Distance vs. Center Carrier Frequency

IRM-3736T IRM-3738T

IRM-3740T IRM-3756T

Relative Transmission Distance (%)

Center Carrier Frequency (kHz)

Relative Transmission Distance (%)

Center Carrier Frequency (kHz)

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Typical Electro-Optical Characteristics Curves

Fig.-9 Arrival Distance vs. Ambient Temperature

17.5

IRM-37xxT SERIES

14.0

10.5

Transmission Distance Lc (m)

7.0

3.5

Ambient Temperature Ta (°C)

Reliability Test Item And Condition

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

LTPD：10%

Test Items Test Conditions

Failure Judgement

Criteria

Samples(n)

Defective(c)

Temperature cycle

High temperature test

Low temperature

storage

High temperature

High humidity

Solder heat

1 cycle -40℃ +100℃

(15min)(5min)(15min)

300 cycle test

Temp: +100℃

Vcc:6V

1000hrs

Temp: -40℃

1000hrs

Ta: 85℃,RH:85%

1000hrs

Temp: 260±5℃ 10sec

4mm From the bottom of the package.

≦ L×0.8

L

0

L45≦ L×0.8

L: Lower

specification limit

n=22,c=0

n=22,c=0

n=22,c=0

n=22,c=0

n=22,c=0

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Packing Quantity Specification

1. 1500 PCS/1Box

2. 10 Boxes/1Carton

Label Form Specification

IRM-37xxT SERIES

CPN: Customer’s Production Number

P/N : Production Number

QTY: Packing Quantity

CAT: Ranks

IRM-3738T

HUE: None

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-037-031 Prepared date：10-Apr-2007 Prepared by： Huayan.Peng