Datasheet

TCA8418
www.ti.com SCPS215B –SEPTEMBER 2009–REVISED MARCH 2010
Table 2. TERMINAL FUNCTIONS
TERMINAL
NO.
TYPE DESCRIPTION
NAME
QFN WCSP
(RTW) (YFP)
1 A1 ROW7 I/O GPIO or row 7 in keypad matrix
2 B1 ROW6 I/O GPIO or row 6 in keypad matrix
3 C1 ROW5 I/O GPIO or row 5 in keypad matrix
4 D1 ROW4 I/O GPIO or row 4 in keypad matrix
5 E1 ROW3 I/O GPIO or row 3 in keypad matrix
6 A2 ROW2 I/O GPIO or row 2 in keypad matrix
7 C2 ROW1 I/O GPIO or row 1 in keypad matrix
8 D2 ROW0 I/O GPIO or row 0 in keypad matrix
9 E2 COL0 I/O GPIO or column 0 in keypad matrix
10 A3 COL1 I/O GPIO or column 1 in keypad matrix
11 B3 COL2 I/O GPIO or column 2 in keypad matrix
12 C3 COL3 I/O GPIO or column 3 in keypad matrix
13 D3 COL4 I/O GPIO or column 4 in keypad matrix
14 E3 COL5 I/O GPIO or column 5 in keypad matrix
15 A4 COL6 I/O GPIO or column 6 in keypad matrix
16 B4 COL7 I/O GPIO or column 7 in keypad matrix
17 C4 COL8 I/O GPIO or column 8 in keypad matrix
18 D4 COL9 I/O GPIO or column 9 in keypad matrix
19 E4 GND – Ground
Active-low reset input. Connect to V
CC
through a pullup resistor, if no active connection
20 A5 RESET I
is used.
21 B5 V
CC
Pwr Supply voltage of 1.65 V to 3.6 V
22 C5 SDA I/O Serial data bus. Connect to V
CC
through a pullup resistor.
23 D5 SCL I Serial clock bus. Connect to V
CC
through a pullup resistor.
Active-low interrupt output. Open drain structure. Connect to V
CC
through a pullup
24 E5 INT O
resistor.
Active-low interrupt hardware output for 3-key simultaneous press-event. Open drain
– B2 CAD_INT O
structure. Connect to V
CC
through a pullup resistor.
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