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AiT Semiconductor

A8946 Datasheet Preview

A8946 Datasheet

TOUCH SCREEN DRIVER

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AiT Semiconductor Inc.
www.ait-ic.com
A8946
TOUCH SCREEN DRIVER
4-WIRE RESISTANCE, LOW-VOLTAGE I/O INTERFACE
DESCRIPTION
FEATURES
The A8946 is a 4-wire touch screen driver which
supports a low-voltage I/O interface from 1.5V to
5.25V.
1.5V to 5.25V digital I/O
2.2V to 5.25V operation
The A8946 has an on-chip 2.5V reference that can
4-wire I/F
be used for the auxiliary input, battery monitor, and
Internal 2.5V reference
temperature measurement modes. The reference
can also be powered down when not used to
Direct battery measurement(0V to 6V)
conserve power. The internal reference operates
Programmable 8 or 12 bit Resolution
down to 2.7V supply voltage, while monitoring the
battery voltage from 0V to 6V.
Temperature measurement
The A8946 is a highly integrated driver for portable
applications with 4-wire resistive touch panel such
Touch-pressure measurement
Available in QFN16 & TSSOP16 Package.
as, PDA, portable instruments, cellular phone, etc.
The A8946 is available in QFN16 & TSSOP16
APPLICATION
package.
Cellular Phones
ORDERING INFORMATION
Personal Digital Assistants
Package Type
Part Number
QFN16
Q16
A8946Q16R
A8946Q16VR
TSSOP16
TMX16
A8946TMX16R
A8946TMX16VR
Note
R:Tape & Reel
V: Green Package
AiT provides all Pb free products
Suffix “V” means Green Package
Portable Instruments
Touch Screen Monitors
Screen Signature Board
Digital Still Camera
Typical Application
REV1.2 - DEC 2007 RELEASED – OCT 2008 REVISED -
-1-




AiT Semiconductor

A8946 Datasheet Preview

A8946 Datasheet

TOUCH SCREEN DRIVER

No Preview Available !

AiT Semiconductor Inc.
www.ait-ic.com
PIN DESCRIPTION
A8946
TOUCH SCREEN DRIVER
4-WIRE RESISTANCE, LOW-VOLTAGE I/O INTERFACE
Pin #
QFN16 TSSOP16
1 13
2 14
3 15
4 16
51
62
73
84
95
10 6
11 7
12 8
13 9
14 10
15 11
16 12
Top View
Top View
Symbol
Functions
BUSY Busy Output. This output is high impedance when CS is high.
Serial Data Input. If CS is low, data is latched on rising edge of
DIN
DCLK.
CS Chip Select Input. Controls conversion timing and enables the
serial input/output register. CS high = power-down mode (ADC
DCLK
+VCC
X+
Y+
X-
Y-
GND
VBAT
AUX
VREF
IOVDD
only).
External Clock Input. This clock runs the SAR conversion process
and synchronizes serial data I/O.
Power Supply
X+ Position Input
Y+ Position Input
X– Position Input
Y– Position Input
Ground
Battery Monitor Input
Auxiliary Input to ADC
Voltage Reference Input / Output
Digital I/O Power Supply
PENIRQ Pen Interrupt
DOUT
Serial Data Output. Data is shifted on the falling edge of DCLK.
This output is high impedance when CS is high.
REV1.2 - DEC 2007 RELEASED – OCT 2008 REVISED -
-2-


Part Number A8946
Description TOUCH SCREEN DRIVER
Maker AiT Semiconductor
Total Page 25 Pages
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