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6.5 Electrical Characteristics
Over operating free-air temperature range (unless otherwise noted). Typical specifications are at T
A
= 25 °C, V
CC
= 3.3 V,
unless otherwise noted.
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
POWER SUPPLY
I
CC
Supply current
VCC = 5.5V
SDAIN, SCLIN = 0V
SDAOUT, SCLOUT = 10k R
PU
2.5 4.5 mA
I
SD
Supply current in shutdown mode through
the V
CC
pin
(1)
EN = 0 V
SDAIN, SCLIN, SDAOUT, SCLOUT = 0V
or V
CC
READY pin = Hi-Z
EN pulled low after bus connection event
(disable precharge)
5 30 µA
UVLO
Under voltage lockout (rising)
EN = V
CC
READY = 10 kΩ to V
CC
2.1 V
Under voltage lockout (falling) 2 V
START-UP CIRCUITRY
V
PRE
Pre-charge voltage SDA, SCL = Hi-Z 0.8 1 1.2 V
RISE-TIME ACCELERATORS
I
PU
RTA pull-up current
(2)
Position transition on SDA, SCL
V
SDA/SCL
= 0.6 V, Slew rate = 1.25 V/µs.
VCC = 3.3 V
2 5 mA
INPUT-OUTPUT CONNECTION
I
LI
Input pin leakage
SDA/SCL pins = 90% V
CC
, EN = V
CC
,
GND
SDA/SCL pins = 10% V
CC
, EN = GND
-1 1 µA
V
OS
Input-output offset voltage (SCLIN to
SCLOUT, SCLOUT to SCLIN and SDAIN
to SDAOUT, SDAOUT to SDAIN
R
PU
for SDA/SCL = 10 kΩ
60 100 mV
I
I_RDY
Ready pin leakage
EN = VCC, READY = V
CC
, Bus
connected
-1 1 µA
DIGITAL IO THRESHOLD
V
IH
High-level input voltage EN
0.7 ×
V
CC
V
CC
V
V
IL
Low-level input voltage EN 0
0.3 ×
V
CC
V
OL
Low-level output voltage
SDAIN, SCLIN, SDAOUT, SCLOUT
I
OL
= 4 mA
V
IN
= 0.1 V
0.15 0.4
READY
I
OL
= 3 mA
0 0.4
DYNAMIC CHARACTERISTICS
C
IN (EN)
EN input capacitance
V
EN
= 0 V or V
CC
f = 400 kHz
1.6 4
pF
C
IO
(READY)
READY output capacitance
V
READY
= 0 V or V
CC
f = 400 kHz
7 10
C
IO (SDA/
SCL)
SDA/SCL pin capacitance
V
PIN
= 0 V or V
CC
f = 400 kHz
5 10
(1) In shutdown mode there will also be current flowing from V
CC
through the ready pin as this pin is pulled down to indicate the bus is
disconnected.
(2) Determined by design, not tested in production.
6.6 Timing Requirements
MIN NOM MAX UNIT
f
SCL_MAX
Maximum SCL clock frequency 400 kHz
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TCA9511A
ZHCSKD1C – OCTOBER 2019 – REVISED JANUARY 2021
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