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Featured Products
Easy-to-use, space-saving
form factor based on custom designs
Capacitive Touchscreen Controller
BU21101MWX
The BU21101MWX is an ultra-compact capacitive touchscreen controller that
requires very few external components.
It is designed to support a variety of sensors while
providing high performance and significant space savings.
Energy Easy
efficient to use
Waterproof
Mist
Drop
Wet finger
Compatible with
stylus pens & gloves
SNR Noise Filter
AC, LCD,
and other noise
Sensor structure that supports a wide range of materials
Compatible with most structures
Bridge
Material
Glass
Pet
Cover
Sensor
Gap
VCOM
LCD Module
Diamond
Stripe
Material
Cover
Max. 2.0 mm
Max. 1.5 mm
AC
Air
Gap
0.2 to 0.6mm
depend on panel
DC
Any
(Air/OCA/None)
0.0mm
Sensor size
Mutual capacitance
Conditions
Typ. 5.0mm
0.5 to 10pF (Typ. 2pF)
Panel Loading (Cp * R)
Cp : Parastic capacitance
R : Registance
Cp = 10pF
R = 100Koh
Sensor
Material Glass
OK
Film
OK
Glass & Film
OK
Pattern Diamond
OK
Structure Bridge
DITO
OK
OK
SITO
OK
One Glass
OK
Cover
ITO
Glass
DITO
Cover
Glass
One Glass
Cover
Film
Cover
Film
Film
Flexible sensor design makes replacement easy
Flash
Memory
Spacesaving
Adjust the settings to
match the sensor.
MASK
ROM
ROM/RAM built in
(The RAM features a patch system
that operates when problems arise)
Cross
Fewer external Thin, compact
parts
package
Only 2 capacitors
required
SITO
OK
Stripe
Energy-saving solution
Mask ROM
OK/NG
40pin
5.0×5.0×0.6mm
Skip
BU21101
Reordering
Cross
-TX to TX: OK
-RX to RX: OK
Skip
R3
R2
X0
Capacitive Touchscreen
X8
X9
R1
Block Diagram
RESETB
Y0
SDA
Y1
HOST
SCL
INTB
Y2
BU21101MWX
3.0V
VDD
LDO
Y11
VSS0/1
C1
X19
X18
X17
X16
X10
C2
Specifications
Touchscreen Controllers
Capacitive Type
Capacitive Touchscreen Controller
Part No.
NEW %&
Panel Size
(Inches)
Supply Voltage
(V)
MCU
Touch
Detection
Host I/F
No. of
Channels
Sensing Method
2.7 to 3.6
32bit
5-point
I2C
32
Mutual
5
UQFN040X5050M
Package
Number of Sensors (Total 32ch)
Package
2C interface
!"
– TX (X) : 18-22ch
– RX (Y): 10-14ch
– Common (TX/RX): 4 ch
UQFN40: 5.0x5.0x0.6mm
Resistive Type
Standby
Current
Operating
Current
Host I/F
Operating
Temp. (°C)
60
4.0mA
I2C/SPI
-20 to +85
VCSP50L2
IC
-20 to +85
VCSP50L2
I2C
-20 to +85
VQFN020V4040
Supply Voltage
(V)
MCU
2.7 to 3.6
32bit
4096×4096 1-/2-point
1.65 to 3.6
-
4096×4096 1-/2-point
100
0.8mA
1.65 to 3.6
-
4096×4096 1-/2-point
100
0.8mA
Part No.
Resolution
Touch
Detection
2
2
2.65×2.70, t=0.55
2.0×2.0, t=0.55
!"
2.7 to 3.6
8bit
1024×1024 1-/2-point
60
4.0mA
I C/SPI
-40 to +85
SSOP-B28
#
2.7 to 3.6
8bit
1024×1024 1-/2-point
60
4.0mA
I2C/SPI
-20 to +85
VCSP50L2
#
2.7 to 3.6
8bit
$
1.65 to 3.6
-
2
2.6×2.6, t=0.55
1024×1024 1-/2-point
60
4.0mA
I C/SPI
-20 to +85
VQFN028V5050
4096×4096
0.8
I2C
-30 to +85
VCSP50L2
1-point
1.5×2.0, t=0.55
Under Development
The content specified in this document is correct as of August 1st, 2013.
Catalog No.56O6713E 08.2013 ROHM © CN
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