MAX1233ETI+ Maxim Integrated Products, MAX1233ETI+ Datasheet - Page 17
![IC CNTRLR TOUCH 28-TQFN](/photos/6/61/66150/28-tqfn_21-0139h_sml.jpg)
MAX1233ETI+
Manufacturer Part Number
MAX1233ETI+
Description
IC CNTRLR TOUCH 28-TQFN
Manufacturer
Maxim Integrated Products
Type
Resistiver
Datasheet
1.MAX1234ETIT.pdf
(44 pages)
Specifications of MAX1233ETI+
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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