TCA8418E_15 Datasheet, PDF (3/50 Pages) Texas Instruments – I2C Controlled Keypad Scan IC With Integrated ESD Protection

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5 Pin Configuration and Functions
TCA8418E
SCPS222C – MAY 2010 – REVISED OCTOBER 2015
E
INT
D
SCL
C
SDA
B
V_CC
A
RESET
5
PIN
NO.
NAME
A1
ROW7
A2
ROW2
A3
COL1
A4
COL6
A5
RESET
B1
ROW6
B2
CAD_INT
B3
COL2
B4
COL7
B5
V_CC
C1
ROW5
C2
ROW1
C3
COL3
C4
COL8
C5
SDA
D1
ROW4
D2
ROW0
D3
COL4
D4
COL9
D5
SCL
E1
ROW3
E2
COL0
E3
COL5
YFP Package
25-Pin DSBGA
Laser Marking and Bump Views
E
E
D
D
C
C
B
B
A
54 3 2 1
A
12 3 4 5
GND
COL9
COL8
COL7
COL6
4
Pin Assignments
COL5
COL4
COL3
COL2
COL1
3
COL0
ROW0
ROW1
CAD_INT
ROW2
2
ROW3
ROW4
ROW5
ROW6
ROW7
1
Pin Functions
I/O
DESCRIPTION
I/O
GPIO or row 7 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or row 2 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 1 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 6 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I
Active-low reset input. Connect to V_CC through a pullup resistor, if no active connection is
used.
I/O
GPIO or row 6 in keypad matrix
O
Active-low interrupt hardware output for 3-key simultaneous press-event. Open drain
structure. Connect to V_CC through a pullup resistor.
I/O
GPIO or column 2 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 7 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
-
Supply voltage of 1.65 V to 3.6 V
I/O
GPIO or row 5 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or row 1 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 3 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 8 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
Serial data bus. Connect to V_CC through a pullup resistor.
I/O
GPIO or row 4 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or row 0 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 4 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 9 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I
Serial clock bus. Connect to V_CC through a pullup resistor.
I/O
GPIO or row 3 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 0 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
I/O
GPIO or column 5 in keypad matrix. If unused, connect to V_CC through a pullup resistor.
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