CRTOUCH Datasheet, PDF (59/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Appendix A Electrical Specifications
This chapter contains electrical and timing specifications.
A.1 Voltage and current operating requirements
Electrical Specifications
Symbol
Description
Minimum
Maximum
Unit
V_DD
Supply voltage
1.8
3.6
V
V_DDA
Analog supply voltage
1.8
3.6
V
V_DD-V_DDA V_DD to -V_DDA differential voltage
-0.1
0.1
V_ss-V_ssA
V_IH
V_ss to -V_ssA differential voltage
Input high voltage ¹
• 2.7 V ≤ VDD ≤ 3.6 V
• 1.8 V ≤ VDD ≤ 2.7 V
-0.1
0.1
0.7 X VDD
—
V
0.75 X VDD
—
V
V_IL
Input low voltage ²
• 2.7 V ≤ VDD ≤ 3.6 V
• 1.8 V ≤ VDD ≤ 2.7 V
—
0.35 X V_DD
V
—
0.3 X V_DD
V
I_IC
DC Injection current – single pin ³
• VIN > VDD
• VIN < VSS
0
2
mA
0
–0.2
mA
DC injection current – sum of all stressed pins ³
• VIN > VDD
0
• VIN < VSS
0
25
mA
–5
mA
V_OH
Output high voltage
• 2.7 V ≤ VDD ≤3.6 V, I_OH = –10 mA
VDD – 0.5
—
V
• 1.8 V ≤ VDD ≤ 2.7 V, I_OH = –3 mA
VDD – 0.5
—
V
V_OL
Output low voltage
• 2.7 V ≤ VDD ≤ 3.6 V, IOH = –10 mA
—
• 1.8 V ≤ VDD ≤ 2.7 V, IOH = –3 mA
—
0.5
V
0.5
V
T_J
Die junction temperature
T_A
Ambient temperature
–40
125
°C
–40
105
°C
1.The device always interprets an input as a 1 when the input is greater than or equal to VIH (min.) and less than or equal to VIH
(max.), regardless of whether input hysteresis is turned on.
2. The device always interprets an input as a 0 when the input is less than or equal to VIL (max.) and greater than or equal to VIL
(min.), regardless of whether input hysteresis is turned on.
3. All functional non-supply pins are internally clamped to V_SS and V_DD. Input must be current limited to the value specified. To
determine the value of the required current-limiting resistor, calculate resistance values for positive and negative clamp
voltages, then use the larger of the two values. Power supply must maintain regulation within operating V_DD range during
instantaneous and operating maximum current conditions. If positive injection current (V_In > V_DD) is greater than I_DD, the
injection current may flow out of V_DD and could result in external power supply going out of regulation. Ensure external V_DD
load will shunt current greater than the maximum injection current. This will be the greatest risk when the MCU is not
consuming power. Examples are: if no system clock is present, or if clock rate is very low (which reduces overall power
consumption).
CRTouch Data Sheet, Rev. 3
Freescale Semiconductor
59