TCA6408A-Q1 Datasheet, PDF (5/40 Pages) Texas Instruments – Low-Voltage 8-Bit I2C and SMBus I/O Expander With Interrupt Output

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TCA6408A-Q1
SCPS234 – SEPTEMBER 2016
Recommended Operating Conditions (continued)
over operating free-air temperature range (unless otherwise noted)
I_OL ⁽²⁾
T_A
Low-level output current
P00-P07
INT, SDA
Operating free-air temperature
T_j = 65°C
T_j = 85°C
T_j = 105°C
T_j = 125°C
T_j = 135°C
T_j = 85°C
T_j = 105°C
T_j = 125°C
T_j = 135°C
MIN
MAX UNIT
25
18
9
4.5
3.5 mA
6
3
1.8
1.5
–40
125 °C
(2) The values shown apply to specific junction temperature. See the Calculating Junction Temperature and Power Dissipation section on
how to calculate the junction temperature.
6.4 Thermal Information
THERMAL METRIC⁽¹⁾
TCA6408A-Q1
PW (TSSOP)
UNIT
16 PINS
R_θJA
R_θJC(top)
R_θJB
ψ_JT
ψ_JB
Junction-to-ambient thermal resistance
Junction-to-case (top) thermal resistance
Junction-to-board thermal resistance
Junction-to-top characterization parameter
Junction-to-board characterization parameter
122
°C/W
56.4
°C/W
67.1
°C/W
10.8
°C/W
66.5
°C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
6.5 Electrical Characteristics
over recommended operating free-air temperature range, V_CCI = 1.65 V to 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_CCP
MIN TYP⁽¹⁾
V_IK
V_PORR
V_PORF
Input diode clamp voltage
Power-on reset voltage, V_CCP rising⁽²⁾
Power-on reset voltage, V_CCP falling⁽²⁾
I_I = –18 mA
V_I = V_CCP or GND, I_O = 0
V_I = V_CCP or GND, I_O = 0
1.65 V to 3.6 V
1.65 V to 3.6 V
1.65 V to 3.6 V
–1.2
1.2
0.6
1
1.65 V
1.2
I_OH = –8 mA
2.3 V
1.8
3V
2.6
V_OH
P-port high-level output voltage
3.6 V
3.3
1.65 V
1.0
I_OH = –10 mA
2.3 V
1.7
3V
2.5
3.6 V
3.2
MAX
1.5
UNIT
V
V
V
V
(1) All typical values are at nominal supply voltage (1.8-V, 2.5-V, or 3.3-V V_CC) and T_A = 25°C.
(2) When power (from 0 V) is applied to V_CCP, an internal power-on reset holds the TCA6408A-Q1 in a reset condition until V_CCP has
reached V_PORR. At that time, the reset condition is released, and the TCA6408A-Q1 registers and I²C/SMBus state machine initialize to
their default states. After that, V_CCP must be lowered to below V_PORF and back up to the operating voltage for a power-reset cycle.
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