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ATB250-EVAL (AitoTouch 11s)
ATB250 Evaluation Board User Manual
Revision 1.2 – May 2014
Introduction
Main features – ATB250-EVAL
The ATB250 Evaluation Board is an evaluation and
development platform for touch user interfaces based
on SEP technology. It allows taking full advantage of all
the ATB250 features and is compatible with the
Arduino platform which can be used as a host for the
ATB250 or a bridge between the ATB250 and the Aito
UX Design Studio software to quickly and easily adjust
the ATB250’s parameters and create feedback patterns.


SEP is a new and exciting user interface technology that
has significant advantages over both traditional
mechanical buttons and other surface touch
technologies such as capacitive sensing. It enables
designers to use entirely new materials such as metal,
wood, fabric and ceramics to create beautiful and
seamless user interfaces.


In addition, SEP offers lower manufacturing costs due
to the reduction in manufacturing process, reduction in
material wastage and the elimination of additional
panels needed for a conventional user interface. The
inherent robustness of SEP and its ability to operate in
harsh environments combined with the field replaceable
nature of the SEP module, also reduces aftermarket
maintenance and inventory costs.
Panel header:
GND / PZCOM / CH1 – CH6
Panel header:
GND / VOUT / CH7 – CH11
Buzzer
CH11 component CH10 component
selection
selection
CH9 component
selection
LEDs voltage
selection
CH8 component
PWR LED
ATB250
selection
CH1 component
CH7 component
selection
selection
CH2 component CH5 component CH6 component
selection
selection
selection
CH3 component CH4 component
selection
selection
Arduino Nano socket
User LED2
User LED3
CONF1
CONF2
Figure 1. ATB250-EVAL board layout
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SENSE
LED11
LED10
LED9
LED8
LED7
LED6
LED5
LED4
LED3
LED2
LED1
User LED4
User LED5
Piezo resistors
SPI/DEO header
3V3
regulator
Piezo resistors
User LED1

I2C/INT
pull-ups
voltage
selection
Power header
I2C connector


On-board ATB250 chip
­ Interface mode configuration through
jumpers
­ Sensitivity level selection through
jumper in DEO mode
­ Full channel mode flexibility by
mounting different components
­ All channels routed to panel headers
Socket for Arduino Nano
­ Compatible with version 3.0
­ Supplies the board with 5V when
plugged in to USB
­ Capable of directly controlling 5 user
LEDs
On-board 3.3V regulator (Input up to 20V)
2
Optional on-board pull-ups for I C/ INT with
selectable voltage
2
Separate I C and SPI/DEO headers
Selectable voltage for on-board LEDs
Aito UX Design Studio support through the
Arduino with bridge software
ATB250-EVAL (AitoTouch 11s)
Confidential
The ATB250-EVAL can be powered in a few different
ways: through USB using the Arduino Nano, through
on-board regulator with 3.6 – 20V input or bypassing
the regulator where the voltage is limited between 2.4
and 3.6V.
In DEO mode the sensitivity is configured by hardware
using the SENSE pin header in the same way described
in interface configuration.
1/3
2/3
SENSE
When the Arduino Nano is plugged into the evaluation
board and connected to USB it will also supply the
board by applying 5V to the VIN power-rail. This powerrail supplies the input of the 3.3V regulator which is
then routed to the REG pins in the power header. In
order to supply ATB250 with the regulated 3.3V a
jumper must be placed to connect pins REG and VDD as
depicted in Figure 2.
GND
DEO sensitivity configuration
VDD
Power supply
Figure 4. SENSE pin connected to Vdd for highest sensitivity
Sensitivity is the highest when SENSE is connected to
Vdd and lowest when connected to Ground.
LEDs voltage selection
VIN
The on-board LEDs can be supplied from either VIN or
VDD. The selected LED voltage is then also connected to
pin VOUT in the panel header for channels 7 – 11.
REG
REG
GND
VOUT
VDD
RES
VIN
VDD
Figure 2. Jumper between REG and VDD pins
Figure 5. LEDs supplied from VDD
In case it is not desired to use Arduino it is also possible
to supply the board externally with up to 20V which are
then regulated down to 3.3V and connected to VDD as
described above. In case the external power supply is
within the ATB250’s limits (2.4 – 3.6V) the regulator
can be bypassed by connecting power directly to the
VDD pin.
To select between VDD and VIN a jumper should be
placed between VOUT and the desired power rail as
depicted in Figure 5. The pins are located below the
pull-up voltage selection pins. If VIN is over 5V then
VDD should be selected.
ATB250 Interface Configuration
GND
INT
SDA
SCL
1/3
2/3
VDD
GND
1/3
2/3
VDD
VIN
Figure 6. Pull-ups connected to VIN
Figure 3. CONF1 connected to 2/3 Vdd and CONF2 to Ground
Figure 3 depicts a possible connection for CONF1 and
2
CONF2 which would configure ATB250 for I C interface
with address 0x5B. For the complete interface
configuration table please refer to ATB250 datasheet.
2
There are on-board 4.7k pull-up resistors for INT ,
SDA and SCL lines. They can be used in case there are
no pull-ups in the host board which interfaces with
ATB250 or for connectivity with the Arduino in which
case they should be connected to VIN.
CONF2
CONF1
VDD
The two pin headers labeled CONF1 and CONF2 will
connect the ATB250’s equally named pins to 1 of 4
possible voltage levels: Vdd, 2/3 Vdd, 1/3 Vdd or
Ground. Before powering ATB250 the user should place
a jumper in the correct level depending on what
interface is intended to be selected.
Pull-ups
The ATB250 pins are 5V tolerant so if VIN is selected it
must not be higher than 5V. If ATB250 is in SPI mode
then the SDA and SCL pull-up jumpers should be
removed for proper operation.
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Confidential
I2C and SPI/DEO headers
Although some of these pins have shared functionality
2
there are separate pin headers for I C and SPI/DEO
interfaces. In case of SPI and DEO the pins needed are
the same (16 – 19) so they have a shared header as the
modes are mutually exclusive. In addition there is also a
ground and interrupt pin on each of the headers. The
2
I C and SPI/DEO signals are also routed to the Arduino
socket.
Ground resistor
The ground resistors (GRx) should only be mounted for
unused channels in DEO mode.
Default configuration
Channel mode selection
All channel modes are supported and the selection is
made by mounting selected components for the desired
mode on a given channel. The components are labeled
as (x – channel number):
 PRx – piezo resistor
 FRx – filter resistor
 FCx – filter capacitor
 LRx – LED resistor
 GRx – ground resistor
 BRx – buzzer resistor (channel 10 only)
 ARx – alternative function resistor (channels
10 and 11 only)
Alternative function resistors
There are two alternative function resistors (ARx). AR10
is used to connect channel 10 to the SENSE header in
DEO mode and AR11 connects channel 11 to the
SPI/DEO header and Arduino socket in SPI mode. When
2
in I C mode both resistors should not be mounted which
avoids having long lines extending from the chip’s pins
that are prone to inducing noise in the piezo signals.
Buzzer resistor
There is only one buzzer resistor (BR10) which is
connected to channel 10 as it is the only channel with
Buzzer output support. If the buzzer is not in use the
resistor should not be mounted.
Piezo components
The piezo resistors (PRx), filter resistors (FRx) and filter
capacitors (FCx) should be mounted only if the channel
is to be used as piezo input. The piezo resistors are
placed next to each panel connector pin and the filter
components are placed close to the ATB250 so that the
lines from the filter to the chip are as short as possible.
LED resistor
The LED resistors (LRx) should be mounted only if the
channel is to be used as LED output and it is desired to
use the on-board LEDs.
3
In case off-board LEDs are used then these components
should not be mounted and the filter resistor (FRx)
component for the corresponding channel should be
mounted with 0Ω value to connect the channel directly
to the corresponding panel connector pin.
The default configuration on ATB250 Evaluation Board
2
is I C mode (address 0x59) with piezo input for channels
1-5, Buzzer output (on-board) for channel 10 and LED
output (on-board) for channels 6-9 and 11.
The values for each component according to the
ATB250 interface mode and channel mode are show in
Table 1 and default jumper locations are as depicted in
Figure 7.
Arduino Nano
All evaluation boards include an Arduino Nano preprogrammed to operate as a bridge between the Aito
Chip and the Aito UX Design Studio. Any Arduino Nano
can be programmed as a bridge using Design Studio
from version 1.2 onward.
The user is free to use the Arduino as a host controller
as well by programming it with the Design Studio code
output or any application specific code. The Aito UX
Design Studio installation package includes a host
project template for Arduino and a library for
interfacing with the Aito Chip. Please refer to the Aito
UX Design Studio user manual for further information.
User LEDs
There are 5 user LEDs which can be controlled with the
Arduino and are connected to pins D3, D4, D5, D6 and
D9. All of these pins except D4 can provide an 8-bit
PWM signal, please refer to the Arduino documentation
for more information (www.arduino.cc).
SPI lines
The SPI pins D11 (MOSI), D12 (MISO) and D13 (SCK) from
the Arduino are connected to the ATB250 lines through
the 0R resistors labeled RS1, RS2 and RS3 respectively.
These resistors are not assembled in production.
Using off-board Aito Chip
The Arduino can also be connected to one or several
off-board Aito Chips through the communication bus
pin headers. If the on-board Aito Chip is not being used
it is then recommended to have it powered-off.
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Revision 1.2
ATB250-EVAL (AitoTouch 11s)
Confidential
Table 1. Channel mode components
Channel
1–9
ATB250 Mode
2
I C/SPI
Function
Component
Piezo Input
LRx / GRx
PRx
FRx
FCx
PRx / FRx / FCx / GRx
LRx
PRx / FCx / LRx / GRx
FRx
PRx / FRx / FCx / LRx / GRx
2
Same as in I C/SPI mode
PRx / FRx / FCx / LRx
GRx
LR10 / AR10 / BR10
PR10
FR10
FC10
PR10 / FR10 / FC10 / AR10 / BR10
LR10
PR10 / FC10 / LR10 / AR10 / BR10
FR10
PR10 / FR10 / FC10 / LR10 / AR10
BR10
PR10 / FR10 / FC10 / LR10 / AR10 / BR10
PR10 / FR10 / FC10 / LR10 / BR10
AR10
LR11 / AR11
PR11
FR11
FC11
PR11 / FR11 / FC11 / AR11
LR11
PR11 / FC11 / LR11 / AR11
FR11
PR11 / FR11 / FC11 / LR11 / AR11
PR11 / FR11 / FC11 / LR11
AR11
LED output (on-board)
LED output (off-board)
DEO
Channel 10
2
I C/SPI
Not used
Piezo Input
Not used
Piezo Input
LED output (on-board)
LED output (off-board)
Buzzer output
DEO
Channel 11
2
IC
Not used
SENSE
Piezo Input
LED output (on-board)
LED output (off-board)
SPI/DEO
(1)
(2)
4
Not used
CS/EOUT3
(1)
Value
(2)
NM
1MΩ
560kΩ
1nF
NM
1kΩ
NM
0Ω
NM
NM
0Ω
NM
1MΩ
560kΩ
1nF
NM
1kΩ
NM
0Ω
NM
1kΩ
NM
NM
0Ω
NM
1MΩ
560kΩ
1nF
NM
1kΩ
NM
0Ω
NM
NM
0Ω
x – channel number
Not mounted
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Revision 1.2
5
RES
VIN
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EOUT3/CS
EOUT2/MOSI
EOUT1/MISO
EOUT0/SCK
INT
GND
INT
SCL
SDA
Panel header:
GND / PZCOM / CH1 – CH6
INT
SCL
VDD
Buzzer
Panel header:
GND / VOUT / CH7 – CH11
VIN
SDA
Pull-ups
SENSE
GND
Arduino Nano socket
1/3
VDD
GND
VOUT
VDD
2/3
VDD
REG
CONF2
CONF1
REG
GND
ATB250-EVAL (AitoTouch 11s)
Confidential
VIN
ATB250
Figure 7. Default jumper locations
Revision 1.2
ATB250-EVAL (AitoTouch 11s)
Confidential
Revision History
Revision 1.2
- Corrected “LED Resistor” text, it indicated that piezo resistor should be 0Ω instead of the filter resistor.
- Changed Arduino Nano text.
- Added information about using an off-board Aito Chip.
- Corrected value of resistor R59 to 270R and LED part numbers in BOM.
- Corrected value of resistors R1, R2 and R3 to 51k in both BOM and schematic.
Revision 1.1
- Added information about ATB250 default configuration.
- Added information about SPI lines connection on Arduino.
- Changed schematic component names to align with channel mode components and modified BOM accordingly.
- Divided schematic into the blocks described in the manual.
- Updated Introduction text.
- Corrected component for LED output (off-board).
- Updated appendixes for board revision 2.0.
- Added image for SENSE pin header.
- Added image with default jumper location.
- Changed title “Default Component Configuration” to “Default Configuration”.
- Added disclaimer to the end of the document.
Revision 1.0
- First version.
6
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Revision 1.2
ATB250-EVAL (AitoTouch 11s)
Confidential
Disclaimer
All information supplied by or on behalf of Aito BV in relation to its products and services, whether in the nature of
data, recommendations or otherwise, is believed to be reliable, but Aito BV assumes no liability whatsoever in
respect of the application, processing or use made of such information, products or services, or any consequence
thereof.
7
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Revision 1.2
ATB250-EVAL schematic
560k
FC4
FC5
FC6
1n
1n
1n
1n
BR10
FC3
1n
VREF
VDD
+
FC9
FC10 FC11
1n
1n
1n
1
2
3
JP9
R43
10k
VDD
RESET
18
17
5
SDA/MISO/EOUT1
SCL/MOSI/EOUT2
INT
19
20
CONF2/SCK/EOUT0
CONF1
GND
GND
JP6
1
2
3
4
C5
4,7uF
POWER CONNECTOR
GND
SCL/MOSI/EOUT2
SDA/MISO/EOUT1
RESET
SCK
0R
RS3
CONF2/SCK/EOUT0
6
5
4
3
2
1
C12
C24
C22
C23
100nF
100nF
100p
100p
GND
VDD
GND
RESET
JP5
GND
V_REG
3V3 REGULATOR
(C) Aito B.V.
TPS7A4533
2
C1
10u
1
IN
SHDN
REG1
OUT
SENSE
4
5
C2
4u7
SDA/MISO/EOUT1
GND
SCL/MOSI/EOUT2
I2C CONNECTOR
V_REG
GND
ARDUINONANO-SOCKET
GND
VREF
VIN
USB
J2-1
J2-2
J2-3
J2-4
J2-5
J2-6
J2-7
J2-8
J2-9
J2-10
J2-11
J2-12
J2-13
J2-14
J2-15
POWER LED
PWR_LED
VIN
MEGA328P
VIN
GND
RST
5V
A7
A6
A5
A4
A3
A2
A1
A0
REF
3V3
D13
1
2
3
4
5
6
2*2
GND
3*2
RS2
TX1
RX0
RST
GND
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
JP7
CS/EOUT3
SCL/MOSI/EOUT2
SDA/MISO/EOUT1
CONF2/SCK/EOUT0
INT
ATB250
GND
SPI/DEO
CONNECTOR
R42
4k7
4
R41
4k7
1n
3
VDD
0R
R57
0R
R55
0R
R53
0R
1
0R
R56
0R
R54
0R
R51
R52
0R
R49
INT
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
J1-7
J1-8
J1-9
J1-10
J1-11
J1-12
J1-13
J1-14
J1-15
GROUND RESISTORS
VIN
1k
R44
RS1
0R
0R
R48
USER_LED1
USER_LED2
VREF
CH1
VDD
CH2
CH3
RESET
CH4
SDA/MISO/EOUT1
CH5
CH6
SCL/MOSI/EOUT2
INTERRUPT
CH7
CH8
CH9 CONF2/SCK/EOUT0
CONF1
CH10/BUZZER/SENSE
CH11/CS/EOUT3
GND
VREF
GND
CS/EOUT3
MOSI
MISO
0R
1
2
3
R59
270R
R3
6
7
8
9
10
11
12
13
14
CH1
CH2
CH3
CH4
CH5
CH6
CH7
CH8
CH9
SENSE
ARD1
1k
R58
4u7
GND
IC1
2
4
6
8
JP10
C17
CONF2/SCK/EOUT0
JP3
1
3
5
7
1
2
3
R40
4k7
2
4
6
8
100nF
C21
GND
CONF1
C18
1n
R2
51k
1
3
5
7
51k
1n
C20
JP8
VDD
1
2
JP11
2
4
6
8
VIN
USER_LED3
USER_LED4
VDD
PIEZO COMPONENTS CH7-11
R1
51k
1
3
5
7
ARDUINO NANO
1k
R45
ON-BOARD PULL-UPS
VOLTAGE SELECTION
VREF
GND
CH10/SENSE 15
CH11/CS/OUT3 16
USER_LED5
1n
BUZZER
GND
1k
R46
1
2
3
VIN
FC8
1n
JP2
1k
R47
JP4
LED8
1k
LR7
LED7
FC7
INTERFACE CONFIGURATION
JP1
C19
1k
LED9
1k
LR8
PIEZO COMPONENTS CH1-6
GND
TSM-108-01-L-SH-A
CON2-1
SPK1
1M
1M
PR1
PR2
1M
1M
PR3
1M
1M
PR4
PR5
PR6
FC2
1n
CON2-2
FR11 560k
CH6
FC1
CON2-3
TSM-108-01-L-SH-A
PZ11
VIN
FR6
CON2-4
TSM-108-01-L-SH-A
VDD
560k
FR10 560k
1M
FR5
CON1-8
TSM-108-01-L-SH-A
CH11/CS/OUT3
1M
TSM-108-01-L-SH-A
CH5
CON2-5
TSM-108-01-L-SH-A
PZ10
PR7
560k
FR9 560k
PR8
FR4
CON1-7
CH10/SENSE
1M
TSM-108-01-L-SH-A
CH4
CON2-6
TSM-108-01-L-SH-A
PZ9
1M
560k
FR8 560k
PR9
FR3
CON1-6
CH9
TSM-108-01-L-SH-A
PZ8
PR10
TSM-108-01-L-SH-A
CH3
AR10
560k
CON2-7
FR7 560k
SENSE
FR2
CON1-5
CH8
AR11
0R
TSM-108-01-L-SH-A
CH2
CS/EOUT3
560k
TSM-108-01-L-SH-A
PZ7
1k
FR1
CON1-4
CH7
0R
TSM-108-01-L-SH-A
CH1
CON2-8
GND
LED_VDD
1M
CON1-3
CONNECTOR CH7-11
TSM-108-01-L-SH-A
PR11
TSM-108-01-L-SH-A
1k
LR9
LED11
GND
CON1-2
1k
LR10
LR11
LED6
LED5
1k
LED4
1k
LR6
1k
LR5
LED3
1k
LR4
LED2
1k
LR2
LR1
CON1-1
TSM-108-01-L-SH-A
1k
LR3
LED1
10k R16
100nF
CONNECTOR CH1-6
LED VOLTAGE SELECTION
VREF
C4
LED10
LED COMPONENTS CH1-11
PZCOM
GND
GND
2
1
51
1
ATB250-EVAL PCB assembly drawing
90
ATB250-EVAL FULL BOM
Qty Reference
Description
Value
Manufacturer
Manufacturers Part Number
Harwin Inc
M20-7821546
PIN HEADER 1X8
Samtec
TSM-108-01-L-SH-A
IC1
ATB250
Aito
ATB250
3
JP1, JP2, JP3
PIN HEADER 2X4
Sullins Connector Solutions
PREC040DAAN-RC
1
ARD1
ARDUINONANO-SOCKET
1
C1
CAPACITOR 0603
10u
3
C2, C21, C5
CAPACITOR 0603
4.7u
2
C22, C23
CAPACITOR 0603
100p
14 FC1, FC2, FC3, FC4, FC5, FC6, FC7, FC8, FC9, FC10, FC11, C17, C19, C20
CAPACITOR 0603
1n
4
C4, C12, C18, C24
CAPACITOR 0603
100n
2
CON1, CON2
1
1
JP11
PIN HEADER 1X2
Sullins Connector Solutions
PREC040SAAN-RC
4
JP4, JP8, JP9, JP10
PIN HEADER 1X3
Sullins Connector Solutions
PREC040SAAN-RC
2
JP5, JP7
PIN HEADER 1X6
Sullins Connector Solutions
PREC040SAAN-RC
1
JP6
PIN HEADER 1X4
Sullins Connector Solutions
PREC040SAAN-RC
11
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10, LED11
LED RED 0603
Lite-On Inc
LTST-C190KRKT
5
USER_LED1, USER_LED2, USER_LED3, USER_LED4, USER_LED5
LED YELLOW 0603
Lite-On Inc
LYQ976-P1S2-36
1
PWR_LED
LED GREEN 0603
OSRAM Opto Semiconductors Inc
SML-510MWT86
2
R16, R43
RESISTOR 0603
3
R1, R2, R3
14 AR10, AR11, RS1, RS2, RS3, R48, R49, R51, R52, R53, R54, R55, R56, R57
1
R59
10k
RESISTOR 0603
51k
RESISTOR 0603
0R
RESISTOR 0603
270R
17 LR1, LR2, LR3, LR4, LR5, LR6, LR7, LR8, LR9, LR10, LR11, BR10, R44, R45, R46, R47, R58
RESISTOR 0603
1k
3
R40, R41, R42
RESISTOR 0603
4.7k
11
FR1, FR2, FR3, FR4, FR5, FR6, FR7, FR8, FR9, FR10, FR11
RESISTOR 0603
560k
11
PR1, PR2, PR3, PR4, PR5, PR6, PR7, PR8. PR9, PR10, PR11
RESISTOR 0603
1M
1
REG1
3.3V REGULATOR
Texas Instruments
TPS7A4533
1
SPK1
BUZZER
Murata
PKLCS1212E2000-R1
Manufacturer
Manufacturers Part Number
Harwin Inc
M20-7821546
TSM-108-01-L-SH-A
ATB250-EVAL DEFAULT CONFIGURATION
Qty Reference
Description
Value
1
ARD1
ARDUINONANO-SOCKET
1
C1
CAPACITOR 0603
10u
3
C2, C21, C5
CAPACITOR 0603
4.7u
2
C22, C23
CAPACITOR 0603
100p
6
FC6, FC7, FC8, FC9, FC10, FC11
NOT ASSEMBLED
8
FC1, FC2, FC3, FC4, FC5, C17, C19, C20
CAPACITOR 0603
1n
4
C4, C12, C18, C24
CAPACITOR 0603
100n
2
CON1, CON2
PIN HEADER 1X8
Samtec
1
IC1
ATB250
Aito
ATB250
3
JP1, JP2, JP3
PIN HEADER 2X4
Sullins Connector Solutions
PREC040DAAN-RC
1
JP11
PIN HEADER 1X2
Sullins Connector Solutions
PREC040SAAN-RC
4
JP4, JP8, JP9, JP10
PIN HEADER 1X3
Sullins Connector Solutions
PREC040SAAN-RC
2
JP5, JP7
PIN HEADER 1X6
Sullins Connector Solutions
PREC040SAAN-RC
1
JP6
PIN HEADER 1X4
Sullins Connector Solutions
PREC040SAAN-RC
11
LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10, LED11
LED RED 0603
Lite-On Inc
LTST-C190KRKT
5
USER_LED1, USER_LED2, USER_LED3, USER_LED4, USER_LED5
LED YELLOW 0603
Lite-On Inc
LYQ976-P1S2-36
1
PWR_LED
LED GREEN 0603
OSRAM Opto Semiconductors Inc
SML-510MWT86
2
R16, R43
RESISTOR 0603
10k
3
R1, R2, R3
RESISTOR 0603
51k
14 AR10, AR11, RS1, RS2, RS3, R48, R49, R51, R52, R53, R54, R55, R56, R57
NOT ASSEMBLED
6
LR1, LR2, LR3, LR4, LR5, LR10
NOT ASSEMBLED
1
R59
RESISTOR 0603
270R
11
LR6, LR7, LR8, LR9, LR11, BR10, R44, R45, R46, R47, R58
RESISTOR 0603
1k
3
R40, R41, R42
RESISTOR 0603
4.7k
6
FR6, FR7, FR8, FR9, FR10, FR11
NOT ASSEMBLED
5
FR1, FR2, FR3, FR4, FR5
RESISTOR 0603
6
PR6, PR7, PR8. PR9, PR10, PR11
NOT ASSEMBLED
5
PR1, PR2, PR3, PR4, PR5
RESISTOR 0603
1
REG1
3.3V REGULATOR
Texas Instruments
TPS7A4533DCQ
1
SPK1
BUZZER
Murata
PKLCS1212E2000-R1
560k
1M