MAX1233ETI+T Maxim Integrated Products, MAX1233ETI+T Datasheet - Page 17

• Manufacturer Part Number: MAX1233ETI+T
• Description: IC CNTRLR TOUCH 28-TQFN
• Manufacturer: Maxim Integrated Products
• Type: Resistiver

Specifications of MAX1233ETI+T

• Touch Panel Interface: 4-Wire
• Number Of Inputs/keys: 1, 4 x 4 Keypad
• Resolution (bits): 8, 10, 12 b
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Data Rate/sampling Rate (sps, Bps): 50k
• Voltage Reference: External, Internal
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Applications: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 7. Key-Press Detection Circuitry
Figure 8a. Timing Diagram for Touch-Initiated Screen Scan
PENIRQ
Controllers Include DAC and Keypad Controller
BUSY
DOUT
X+
CS
______________________________________________________________________________________
TO KEYPAD
WAKEUP AND
DEBOUNCE
LOGIC
±15kV ESD-Protected Touch-Screen
DRIVERS PULL HIGH
OR GO THREE-STATE
SIMPLIFIED KEYPAD CIRCUITRY
TOUCH-
SCREEN
DATA
DATA
READ
R1
R2
R3
R4
C1
Figure 8b. Timing Diagram for Host-Initiated Screen Scan
PENIRQ
DOUT
BUSY
DIN
CS
X+
C2
C3
C4
KEYPAD
TOUCH-
SCREEN
DATA
DATA
READ
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