TCA9538 Datasheet, PDF (5/37 Pages) Texas Instruments – Low Voltage 8-Bit I2C and SMBus Low-Power I/O Expander

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TCA9538
SCPS199C – AUGUST 2014 – REVISED OCTOBER 2015
6.4 Thermal Information
THERMAL METRIC⁽¹⁾
TCA9538
PW (TSSOP)
DB (SSOP)
UNIT
16 PINS
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
122.0
56.4
67.1
10.8
66.5
113.2
63.6
64.0
21.2
63.4
°C/W
°C/W
°C/W
°C/W
°C/W
(1) For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953.
6.5 Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_IK
V_PORR
V_PORF
Input diode clamp voltage
Power-on reset voltage, V_CC rising
Power-on reset voltage, V_CC
falling
I_I = –18 mA
V_I = V_CC or GND, I_O = 0
V_I = V_CC or GND, I_O = 0
I_OH = –8 mA
V_OH P-port high-level output voltage⁽²⁾
I_OH = –10 mA
SDA ⁽³⁾
V_OL = 0.4 V
I_OL
P port⁽⁴⁾
INT ⁽⁵⁾
SCL, SDA
I_I
A0, A1, RESET
I_IH
P port
I_IL
P port
V_OL = 0.5 V
V_OL = 0.7 V
V_OL = 0.4 V
V_I = V_CC or GND
V_I = V_CC
V_I = GND
V_CC
1.65 V to 5.5 V
MIN
–1.2
TYP ⁽¹⁾
1.2
MAX
1.5
UNIT
V
V
0.75
1.0
V
1.65 V
1.2
2.3 V
1.8
3V
2.6
4.5 V
4.1
1.65 V
1.1
2.3 V
1.7
3V
2.5
4.5 V
4.0
1.65 V to 5.5 V
3
1.65 V
8
2.3 V
8
3V
8
4.5 V
8
1.65 V
10
2.3 V
10
3V
10
4.5 V
10
1.65 V to 5.5 V
3
1.65 V to 5.5 V
1.65 V to 5.5 V
1.65 V to 5.5 V
V
11
10
13
15
17
mA
14
17
20
24
7
±1
μA
±1
1 μA
–1 μA
(1) All typical values are at nominal supply voltage (1.8-V, 2.5-V, 3.3-V, or 5-V V_CC) and T_A = 25°C.
(2) Each P-port I/O configured as a high output must be externally limited to a maximum of 10 mA, and the total current sourced by all I/Os
(P-ports P7-P0) through V_CC should be limited to a maximum current of 80 mA.
(3) The SDA pin must be externally limited to a maximum of 12 mA, and the total current sunk by all I/Os (P-ports P7-P0, INT, and SDA)
through GND should be limited to a maximum current of 200 mA.
(4) Each P-port I/O configured as a low output must be externally limited to a maximum of 25 mA, and the total current sunk by all I/Os (P-
ports P7-P0, INT, and SDA) through GND should be limited to a maximum current of 200 mA.
(5) The INT pin must be externally limited to a maximum of 7 mA, and the total current sunk by all I/Os (P-ports P7-P0, INT, and SDA)
through GND should be limited to a maximum current of 200 mA.
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