Datasheet

LTC4312
3
4312f
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Power Supply/Start-Up
V
CC
Input Supply Range
l
2.9 5.5 V
V
DD, BUS
2-Wire Bus Supply Voltage
l
2.25 5.5 V
V
CC2
Output Side Accelerator Supply
Range
l
2.25 5.5 V
I
CC
Input Supply Current One or Both V
ENABLE1-2
= V
CC
= V
CC2
= 5.5V (Note 3)
l
6.0 7.3 9 mA
I
CC(DISABLED)
Input Supply Current V
ENABLE1-2
= 0V; V
CC
= V
CC2
= 5.5V (Note 3)
l
1.6 2.2 3.5 mA
I
CC2
V
CC2
Supply Current One or Both V
ENABLE1-2
= V
CC
= V
CC2
= 5.5V (Note 3)
l
0.35 0.5 0.6 mA
t
UVLO
UVLO Delay
l
60 110 200 μs
V
TH_UVLO
UVLO Threshold
l
2.3 2.6 V
V
CC_UVLO(HYST)
UVLO Threshold Hysteresis
Voltage
200 mV
Buffers
V
OS1(SAT)
Buffer Offset Voltage I
OL
= 4mA, Driven V
SDAIN,SCLIN
= 50mV
l
130 220 280 mV
I
OL
= 500μA, Driven V
SDAIN,SCLIN
= 50mV
l
15 60 120 mV
V
OS2(SAT)
Buffer Offset Voltage I
OL
= 4mA, Driven V
SDAOUT, SCLOUT
= 50mV
l
90 190 260 mV
I
OL
= 500μA, Driven V
SDAOUT, SCLOUT
= 50mV
l
15 55 110 mV
V
OS
Buffer Offset Voltage I
OL
= 4mA, Driven V
SDAIN,SCLIN
= 200mV
l
50 130 195 mV
I
OL
= 500μA, Driven V
SDAIN,SCLIN
= 200mV
l
15 55 110 mV
V
OS2
Buffer Offset Voltage I
OL
= 4mA, Driven V
SDAOUT, SCLOUT
= 200mV
l
35 95 170 mV
I
OL
= 500μA, Driven V
SDAOUT, SCLOUT
= 200mV
l
15 50 100 mV
V
IL,FALLING
Buffer Input Logic Low Voltage SDA, SCL Pins (Notes 4, 5)
l
0.3•V
MIN
0.33•V
MIN
0.36•V
MIN
V
V
IL,RISING
Buffer Input Logic Low Voltage SDA, SCL Pins; ACC Grounded
l
0.5 0.6 0.7 V
SDA, SCL Pins; ACC Open or High (Notes 4, 5)
l
0.3•V
MIN
0.33•V
MIN
0.36•V
MIN
V
I
LEAK
Input Leakage Current SDA, SCL Pins; V
CC
, V
CC2
= 0V, 5.5V
l
±10 μA
C
IN
Input Capacitance SDA, SCL Pins (Note 6) <20 pF
Rise Time Accelerators
dV/dt (RTA) Minimum Slew Rate Requirement SDA, SCL Pins; V
CC
= V
CC2
= 5V
l
0.1 0.2 0.4 V/μs
V
RTA(TH)
Rise Time Accelerator DC
Threshold Voltage
SDA, SCL Pins; V
CC
= V
CC2
= 5V, ACC Grounded
l
0.7 0.8 0.9 V
ACC Open or High, V
CC
= V
CC2
= 5V (Note 4)
l
0.36•V
MIN
0.4•V
MIN
0.44•V
MIN
V
ΔV
ACC
Buffers Off to Accelerator On
Voltage
SDA, SCL Pins; V
CC
= V
CC2
= 5V, ACC Grounded
l
100 200 mV
ACC Open, V
CC
= V
CC2
= 5V (Note 4)
l
0.05•V
MIN
0.07•V
MIN
mV
I
RTA
Rise Time Accelerator Pull-Up
Current
SDA, SCL Pins; V
CC
= V
CC2
= 5V, ACC Grounded
(Note 7)
l
20 35 45 mA
ACC Open, V
CC
= V
CC2
= 5V (Note 7)
l
1.5 3 4 mA
Enable/Control
V
DISCEN(TH)
DISCEN Threshold Voltage
l
0.8 1.4 2 V
ΔV
DISCEN(HYST)
DISCEN Hysteresis Voltage 20 mV
V
EN(TH)
ENABLE1-2 Threshold Voltage
l
0.8 1.4 2 V
ΔV
EN(HYST)
ENABLE1-2 Hysteresis Voltage 20 mV
t
LH_EN
ENABLE1-2 High to Buffer Active 0.56 1 μs
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= V
CC2
= 3.3V unless otherwise noted.