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MK712SI

Touch Screen Controller

Integrated Circuit Systems 

I CR O C LOC K

MK712

Touch Screen Controller

Electrical Specifications

Parameter

Conditions

ABSOLUTE MAXIMUM RATINGS (note 1)

Supply voltage, VDD

Referenced to GND

Inputs and Clock Outputs

Referenced to GND

Ambient Operating Temperature

Soldering Temperature

Max of 20 seconds

Storage temperature

DC CHARACTERISTICS

Operating Voltage, VDD

Input High Voltage, VIH

VDD=5V

Input Low Voltage, VIL

VDD=5V

Output High Voltage, VOH

IOH=-2mA

Output High Voltage, VOH

VDD=5V, IOH=-12mA

Output Low Voltage, VOL

VDD=5V, IOL=12mA

Input High Voltage, VIH

VDD=3.3V

Input Low Voltage, VIL

VDD=3.3V

Output High Voltage, VOH

VDD=3.3V, IOH=-6mA

Output Low Voltage, VOL

VDD=3.3V, IOL=6mA

Operating Supply Current, IDD, at VDD=5V 300 Ω screen, 100 PPS

Operating Supply Current, IDD, at VDD=3.3V note 4

Operating Supply Current, IDD standby, clock note 5

Operating Supply Current, IDD standby

note 6

Operating Supply Current, IDD power down PD=0 or PD=1, no clock

Short Circuit Current

Each output

Input Capacitance

AC CHARACTERISTICS

Input Clock Frequency, pin 18

Note 2

Input Clock Duty Cycle, pin 18

at 1.5V

Output Rise Time

0.8 to 2.0V, VDD=5V

Output Fall Time

2.0 to 0.8V, VDD=5V

Resolution

Non-linearity

Monotonic, note 3

Touch Screen Resistance

Minimum

-0.5

0

-65

3.0

2.0

VDD-0.4

2.4

1.9

2.4

12

25

100

Typical Maximum Units

7

V

VDD+0.5 V

70

°C

260

°C

150

°C

5.5

V

V

0.8

V

V

V

0.4

V

V

0.4

V

V

0.4

V

5

mA

3

mA

0.5

3

µA

0.5

3

µA

0.2

3

µA

±50

mA

7

pF

14.32

20

75

3

3

12

±2

2000

MHz

%

ns

ns

bits

LSB

Ω

Notes: 1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged

exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.

2. Consult MicroClock about the best device to use to generate the input clock.

3. With no missing codes.

4. Assumes no 14.3MHz input clock overshoot, 300 Ω screen, 100 PPS

5. Assumes no 14.3MHz input clock overshoot, no touch

6. With no touch, no clock

MDS 712 I

10

Revision 100899 Printed 11/16/00

Integrated Circuit Systems, Inc.•525 Race St.•San Jose•CA•95126•(408)295-9800tel•www.icst.com

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