IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 1
Rev. B, 07/04/2013
IR SENSOR FOR TOUCHLESS PROXIMITY
July 2013
GENERAL DESCRIPTION
The IS31SE5001 is a low-power, reflectance-based
infrared light sensor with advanced signal processing
and digital output. The sensor can detect making
touchless motion possible.
The IS31SE5001 uses one infrared LED and an
internal receiver which pick up the reflectance signal
to perform touchless motion detection. When
proximity motion happens, the flag bit in status
register will be triggered and an interrupt signal is
generated to inform the master to read the flag bit
through I2C interface.
IS31SE5001 is available in QFN-8 (2mm × 2mm). It
operates from 2.7V to 5.5V over the temperature
range of -40°C to +85°C.
FEATURES
Supply voltage from 2.7V~5.5V
400kHz I2C compatible interface
1µA shutdown current
0.6mA low supply current
Detection range can be adjusted
Integrated signal processing and digital output
Auto interrupt clear
Package in QFN-8 (2mm × 2mm)
APPLICATIONS
Smart phones/GPS/MID/PAD/MP3
Lighting/switch controller/
household electrical appliances
Toys/game machine
TYPICAL APPLICATION CIRCUIT
SDA
SCL
SDB
IS31SE5001
IRLED
VBattery
VCC
1F0.1F
Micro
Controller
4.7k4.7k
VDD
100k
INTB
4.7k
8
5
4
3
2
7
IRLED
VBattery
LCD
IS31SE5001 IRLED
IS31SE5001 IRLED
GND 1
RX 6
Figure 1 Typical Application Circuit
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 2
Rev. B, 07/04/2013
PIN CONFIGURATION
Package Pin Configuration (Top View) Scenograph (Top View)
QFN-8
8
7
6
5
2
3
4
GND
SDB
SDA
INTB
SCL
IRLED
VCC
RX
1
Bottom View Top View
Actual Picture
PIN DESCRIPTIO N
No. Pin Description
1 GND Ground.
2 SDB Shutdown pin, low active.
3 INTB Interrupt signal, pulled down to inform master to read data.
4 SCL The input for the I2C clock signal.
5 SDA The input for the I2C data signal.
6 RX Input signal of infrared LED receiver.
7 VCC Power supply.
8 IRLED IRLED emitting pin. Connect to IRLED.
Pin1 Pin1
PD
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 3
Rev. B, 07/04/2013
ORDERING INFORMATION
Industrial Range: -40°C to +85°C
Order Part No. Package QTY/Reel
IS31SE5001-QFLS2-TR QFN-8, Lead-free 3000
Copyright©2013IntegratedSiliconSolution,Inc.Allrightsreserved.ISSIreservestherighttomakechangestothisspecificationanditsproductsatany
timewithoutnotice.ISSIassumesnoliabilityarisingoutoftheapplicationoruseofanyinformation,productsorservicesdescribedherein.Customersare
advisedtoobtainthelatestversionofthisdevicespecificationbeforerelyingonanypublishedinformationandbeforeplacingordersforproducts.
IntegratedSiliconSolution,Inc.doesnotrecommendtheuseofanyofitsproductsinlifesupportapplicationswherethefailureormalfunctionofthe
productcanreasonablybeexpectedtocausefailureofthelifesupportsystemortosignificantlyaffectitssafetyoreffectiveness.Productsarenot
authorizedforuseinsuchapplicationsunlessIntegratedSiliconSolution,Inc.receiveswrittenassurancetoitssatisfaction,that:
a.)theriskofinjuryordamagehasbeenminimized;
b.)theuserassumeallsuchrisks;and
c.)potentialliabilityofIntegratedSiliconSolution,Incisadequatelyprotectedunderthecircumstances
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 4
Rev. B, 07/04/2013
ABSOLUTE MAXIMUM RATINGS
Supply voltage, VCC -0.3V ~ +6.0V
Voltage at any input pin -0.3V ~ VCC+0.3V
Operating temperature range, TA -40°C ~ +85°C
Storage temperature range, TSTG -40°C ~ +85°C
Note:
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only
and functional operation of the device at these or any other condition beyond those indicated in the operational sections of the specifications is
not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
TA = 25°C, VCC = 2.7V ~ 5.5V, unless otherwise noted. Typical value are TA = +25°C, VCC = 3.6V.
Symbol Parameter Condition Min. Typ. Max. Unit
VCC Supply voltage 2.7 5.5 V
ICC Quiescent current VSDB = VCC 0.6 mA
ISD Shutdown current VSDB = 0V 1 3 μA
IIR Average current of IRLED VLED =3.6V(Note 1) 0.8 mA
IP Peak current of IRLED EC = “0001” (Note 1,2) 400 mA
VINT INTB pin output voltage low IOL = 4mA 0.2 V
L Maximum detect distance EC = “0001” (Note 3) 15 cm
VIH Input logic high voltage VCC = 2.7V 0.4 V
VIL Input logic low voltage VCC = 5.5V 1.4 V
DIGITAL INPUT SWITCHING CHARACTERISTICS (Note 1)
Symbol Parameter Condition Min. Typ. Max. Unit
fSCL Serial-Clock frequency 400 kHz
tBUF Bus free time between a STOP and a START
condition 1.3 μs
tHD, STA Hold time (repeated) START condition 0.6 μs
tSU, STA Repeated START condition setup time 0.6 μs
tSU, STO STOP condition setup time 0.6 μs
tHD, DAT Data hold time 0.9 μs
tSU, DAT Data setup time 100 ns
tLOW SCL clock low period 1.3 μs
tHIGH SCL clock high period 0.7 μs
tR Rise time of both SDA and SCL signals,
receiving (Note 4) 20+0.1Cb 300 ns
tF Fall time of both SDA and SCL signals,
receiving (Note 4) 20+0.1Cb 300 ns
Note 1: Guaranteed by design.
Note 2: The EC bit is used to set emitting current. Please refer to the detailed information in Page 7.
Note 3: Because of different IRLED and material of cover, the detection distance will be different. The detail parameter should be tested.
IR26-21C/L110/CT for IRLED is recommended.
Note 4: Cb = total capacitance of one bus line in pF. ISINK ≤ 6mA. tR and tF measured between 0.3 × VCC and 0.7 × VCC.
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 5
Rev. B, 07/04/2013
DETAILED DESCRIPTION
I2C INTERFACE
The IS31SE5001 uses a serial bus, which conforms to
the I2C protocol, to control the chip’s functions with two
wires: SCL and SDA. The IS31SE5001 has a 7-bit
slave address (A7:A1), followed by the R/W bit, A0. Set
A0 to “0” for a write command and set A0 to “1” for a
read command.
The complete slave address is:
Table 1 Slave Address (Write only):
Bit A7:A1 A0
Value 1010101 1/0
The SCL line is uni-directional. The SDA line is
bi-directional (open-collector) with a pull-up resistor
(typically 4.7kΩ). The maximum clock frequency
specified by the I2C standard is 400kHz. In this
discussion, the master is the microcontroller and the
slave is the IS31SE5001.
The timing diagram for the I2C is shown in Figure 2.
The SDA is latched in on the stable high level of the
SCL. When there is no interface activity, the SDA line
should be held high.
The “START” signal is generated by lowering the SDA
signal while the SCL signal is high. The start signal will
alert all devices attached to the I2C bus to check the
incoming address against their own chip address.
The 8-bit chip address is sent next, most significant bit
first. Each address bit must be stable while the SCL
level is high.
After the last bit of the chip address is sent, the master
checks for the IS31SE5001’s acknowledge. The
master releases the SDA line high (through a pull-up
resistor). Then the master sends an SCL pulse. If the
IS31SE5001 has received the address correctly, then
it holds the SDA line low during the SCL pulse. If the
SDA line is not low, then the master should send a
“STOP” signal (discussed later) and abort the transfer.
Following acknowledge of IS31SE5001, the register
address byte is sent, most significant bit first.
IS31SE5001 must generate another acknowledge
indicating that the register address has been received.
Then 8-bit of data byte are sent next, most significant
bit first. Each data bit should be valid while the SCL
level is stable high. After the data byte is sent, the
IS31SE5001 must generate another acknowledge to
indicate that the data was received.
The “STOP” signal ends the transfer. To signal “STOP”,
the SDA signal goes high while the SCL signal is high.
READING PORT REGISTERS
To read the device data, the bus master must first send
the IS31SE5001 address with the R/W
____
bit set to “0”,
followed by the command byte, which determines
which register is accessed. After a restart, the bus
master must then send the IS31SE5001 address with
the R/W
____
bit set to “1”. Data from the register defined
by the command byte is then sent from the
IS31SE5001 to the master (Figure 5).
Figure 2 Interface timing
Figure 3 Bit transfer
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 6
Rev. B, 07/04/2013
Figure 4 Writing to IS31SE5001
Figure 5 Reading from IS31SE5001
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 7
Rev. B, 07/04/2013
REGISTERS DEFINITIONS
Table 2 Register Function
Address Name Function R/W Table Default
00h Status Register Store the motion information R 3 xxxx xxxx
01h Shutdown Register Set software shutdown W 4
0000 0000
11h Configuration Register
Configure operating function W 5
Table 3 00h Status Register (Read Only)
Bit D7:D4 D3:D2 D1:D0
Name - PD -
Default -
The Status Register stores the motion information
which detected by IS31SE5001.
PD Proximity Detection (Figure 6)
01 Be off
10 Be close
Others No motion
IS31SE5001 IRLED
Figure 6 Proximity Detect (Side View)
Table 4 01h Shutdown Register
Bit D7:D1 D0
Name - SSD
Default 0000000 0
The Shutdown Register sets software shutdown mode
of IS31SE5001.
SSD Software Shutdown Enable
0 Software shutdown mode
1 Normal operation
Table 5 11h Configuration Register
Bit D7:D4 D3:D0
Name - EC
Default 0000 0000
The Configuration Register sets the operating function.
EC Emitting Current Setting
(Adjusting detection distance, refer to detail
information in Page 9)
0001 400mA
0011 280mA
0111 210mA
1111 7 0m A
Note the default value of EC is “0000”. The EC bit must
be configured when power on. The INTB pin will be
triggered when configure the EC bit first time. This
interrupt can be ignored.
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 8
Rev. B, 07/04/2013
FUNCTIONAL BLOCK DIAGRAM
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 9
Rev. B, 07/04/2013
APPLICATION INFORMATION
GENERAL DESCRIPTION
The IS31SE5001 is a low-power, reflectance-based
infrared light sensor with advanced signal processing
and digital output. The sensor can detect making
touchless motion possible.
STATUS INFORMATION
Master can get the current motion information by
reading the PD bit of Status Register (00h).
The PD bit is available when IS31SE5001 operates. If
the PD bit is “01”, it means the object is away from the
IC. If the PD bit is “10”, it means the object is close to
the IC (Table 3). If PD bit is other data, there is no
motion.
INTERRUPTION
The changing of motion can be signed by the INTB pin.
The INTB pin will be pulled low when object moving
before the LCD panel (PD bit changing). And the MCU
can get the information via reading the Status Register
(00h). The INTB will be back to high until the MCU
reading the Status Register (00h). The INTB pin will be
high automatically when it stays low last 10ms to
ensure system operating normally.
DETECTION DISTANCE
The emitting current can be adjusted by the EC bit of
Configuration Register (11h). The larger current is, the
longer distance detected.
Because of the different IRLED and material of cover,
the detection distance will be different for the same
emitting current. Detail information should be decided
by testing.
In the stable mode and operating mode, the average
emitting current for both two modes, IIR, can be
calculated by the Equation (1):
EC
I
IR
I 512
1 (1)
The IEC is the emitting current which setting by the EC
bit.
SHUTDOWN MODE
Shutdown mode can be used as a means of reducing
power consumption. During shutdown mode all
registers retain their data.
SOFTWARE SHUTDOWN
By setting SSD bit of the Shutdown Register (01h) to
“0”, the IS31SE5001 will operate in software shutdown
mode.
HARDWARE SHUTDOWN
The chip enters hardware shutdown mode when the
SDB pin is pulled low, wherein they consume only 1μA
(Typ.) current.
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 10
Rev. B, 07/04/2013
CLASSIFICATION REFLOW PROFI LES
Profile Feature Pb-Free Assembly
Preheat & Soak
Temperature min (Tsmin)
Temperature max (Tsmax)
Time (Tsmin to Tsmax) (ts)
150°C
200°C
60-120 seconds
Average ramp-up rate (Tsmax to Tp) 3°C/second max.
Liquidous temperature (TL)
Time at liquidous (tL)
217°C
60-150 seconds
Peak package body temperature (Tp)* Max 260°C
Time (tp)** within 5°C of the specified
classification temperature (Tc) Max 30 seconds
Average ramp-down rate (Tp to Tsmax) 6°C/second max.
Time 25°C to peak temperature 8 minutes max.
Figure 7 Classification Profile
IS31SE5001
Integrated Silicon Solution, Inc. – www.issi.com 11
Rev. B, 07/04/2013
PACKAGE INFORMATION
QFN-8
Note: All dimensions in millimeters unless otherwise stated.
