TCA4311A Datasheet, PDF (5/22 Pages) Texas Instruments – HOT SWAPPABLE 2-WIRE BUS BUFFERS

TCA4311A
www.ti.com
SCPS226 – JANUARY 2011
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Power Supply
V_CC
Positive supply voltage
I_CC
Supply current
V_CC = 5.5 V, V_SDAIN = V_SCLIN = 0 V
I_SD
Supply current in shutdown
mode
V_EN = 0 V
2.7
5.5 V
5.1
7 mA
0.1
mA
Start-Up Circuitry
V_PRE
t_IDLE
V_EN
V_DIS
I_EN
t_EN
t_DIS
Precharge voltage
Bus idle time
EN threshold voltage
Disable threshold voltage
EN input current
Enable time
Disable time (EN to
READY)
SDA, SCL floating
EN Pin
EN from 0 V to V_CC
0.8
1
1.2 V
50
95
150 ms
0.5 × V_CC 0.9 × V_CC V
0.1 × V_CC 0.5 × V_CC
V
±0.1
±1 mA
95
ms
30
ns
t_STOP
SDAIN to READY delay
after STOP
1.2
ms
t_READY
SCLOUT/SDAOUT to
READY
0.8
ms
I_OFF
READY OFF state leakage
current
±0.1
mA
V_OL
READY output low voltage I_PULLUP = 3 mA
Rise-Time Accelerators
0.4 V
I_PULLUPAC
Transient boosted pull-up
current
Positive transition on SDA, SCL, V_CC = 2.7 V,
1
2
mA
Input-Output Connection
V_OS
Input-output offset voltage
C_IN
Digital input capacitance
V_OL
Output low voltage, input =
0V
10 kΩ to V_CC on SDA, SCL, V_CC = 3.3 V,⁽¹⁾
SDA, SCL pins, I_SINK = 3 mA,
0
100
175 mV
10 pF
0
0.4 V
I_I
Input leakage current
SDA, SCL pins = V_CC = 5.5 V
±5 mA
(1) The connection circuitry always regulates its output to a higher voltage than its input. The magnitude of this offset voltage as a function
of the pullup resistor and V_CC voltage is shown in the Typical Performance Characteristics section.
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