BU21028FV-M Datasheet, PDF (5/36 Pages) Rohm – 4-wire Resistive Touch Screen Controller

BU21028FV-M
Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
Conditions
Power supply voltage
VDD
-0.3 to 4.5
V
Power supply voltage for
touch screen
Digital input voltage
VDDP
VIN1
-0.3 to 4.5
-0.3 to VDD+0.3
V
V
AD0,AD1,SDA,
SCL and RSTB
AUX input voltage
VIN2
GND-0.3 to 2.5
V AUX
Voltage input to
touch screen Interface
VIN3
GND-0.3 to 2.5
V
XP,YP,XN
and YN
Storage temperature range
Tstg
-50 to 125
℃
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Thermal Resistance^{(Note 1)}
Parameter
Symbol
Thermal Resistance (Typ)
1s^{(Note 3)}
2s2p^{(Note 4)}
Unit
SSOP-B20
Junction to Ambient
θJA
115.4
57.3
°C/W
Junction to Top Characterization Parameter^{(Note 2)}
ΨJT
10
8
°C/W
(Note 1)Based on JESD51-2A(Still-Air)
(Note 2)The thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside
surface of the component package.
(Note 3)Using a PCB board based on JESD51-3.
Layer Number of
Measurement Board
Material
Single
FR-4
Board Size
114.3mm x 76.2mm x 1.57mmt
Top
Copper Pattern
Footprints and Traces
Thickness
70μm
(Note 4)Using a PCB board based on JESD51-7.
Layer Number of
Measurement Board
Material
4 Layers
FR-4
Top
Copper Pattern
Footprints and Traces
Thickness
70μm
Board Size
114.3mm x 76.2mm x 1.6mmt
2 Internal Layers
Copper Pattern
Thickness
74.2mm x 74.2mm
35μm
Bottom
Copper Pattern
74.2mm x 74.2mm
Thickness
70μm
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TSZ02201-0L5L0F300720-1-2
27.May.2016 Rev.002