TCA8418 Datasheet, PDF (5/37 Pages) Texas Instruments – I2C CONTROLLED KEYPAD SCAN IC WITH INTEGRATED ESD PROTECTION

TCA8418
www.ti.com ......................................................................................................................................................................................... SCPS215 – SEPTEMBER 2009
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, V_CC = 1.65 V to 3.6 V (unless otherwise noted)
PARAMETER
V_IK Input diode clamp voltage
V_POR Power-on reset voltage
TEST CONDITIONS
I_I = –18 mA
V_I = V_CCP or GND, I_O = 0
I_OH = –1 mA
V_CCP
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V
1.65 V
MIN
–1.2
1.25
1.2
V_OH
ROW0–7, COL0–9 high-level
output voltage
I_OH = –8 mA
2.3 V
1.8
3V
2.6
1.65 V
1.1
I_OH = –10 mA
2.3 V
1.7
3V
2.5
I_OL = 1 mA
1.65 V
1.65 V
V_OL
ROW0–7, COL0–9 low-level
output voltage
I_OL = 8 mA
2.3 V
3V
1.65 V
I_OL = 10 mA
2.3 V
3V
SDA
I_{OL INT and CAD_INT}
V_OL = 0.4 V
V_OL = 0.4 V
I_I
SCL, SDA, ROW0–7, COL0–9,
RESET
V_I = V_CCI or GND
1.65 V to 3.6 V
3
1.65 V to 3.6 V
3
1.65 V to 3.6 V
r_INT ROW0–7, COL0–9
f_SCL = 0 kHz
Oscillator
OFF
Oscillator
ON
1.65 V to 3.6 V
1.65 V
f_SCL = 400 kHz
3.6 V
I_CC
V_I on SDA,
ROW0–7,
COL0–9 = V_CC or
GND,
f_SCL = 1 MHz
1 key press
1.65 V
3.6 V
I_O = 0, I/O =
inputs,
f_SCL = 400 kHz
f_SCL = 1 MHz
GPI low
(pullup
enable) ⁽¹⁾
f_SCL = 400 kHz
f_SCL = 1 MHz
GPI low
(pullup
disable)
1.65 V to 3.6 V
C_I SCL
SDA
C_{io ROW0–7, COL0–9}
V_I = V_CCI or GND
f_SCL = 400 kHz
f_SCL = 1 MHz
1 GPO
active
V_IO = V_CC or GND
1.65 V to 3.6 V
1.65 V to 3.6 V
TYP MAX
1 1.4
0.4
0.45
0.25
0.25
0.6
0.3
0.25
1
105
7
18
50
90
65
153
55
65
15
24
55
65
6
8
10 12.5
5
6
UNIT
V
V
V
V
mA
µA
kΩ
µA
pF
pF
(1) Assumes that one GPIO is enabled.
Copyright © 2009, Texas Instruments Incorporated
Product Folder Link(s): TCA8418
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