EXPOSED PAD (PIN 21) PCB CONNECTION TO GND IS OPTIONAL
GN PACKAGE
20-LEAD PLASTIC SSOP
T
JMAX
= 150°C,
θ
JA
= 90°C/W,
θ
JC
= 30°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC4314IUDC#PBF
LTC4314IGN#PBF
LTC4314CUDC#PBF
LTC4314CGN#PBF
TAPE AND REEL
LTC4314IUDC#TRPBF
LTC4314IGN#TRPBF
LTC4314CUDC#TRPBF
LTC4314CGN#TRPBF
PART MARKING*
LFMR
LTC4314GN
LFMR
LTC4314GN
PACKAGE DESCRIPTION
20-Lead (3mm
×
4mm) QFN
20-Lead Plastic SSOP
20-Lead (3mm
×
4mm) QFN
20-Lead Plastic SSOP
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
0°C to 70°C
0°C to 70°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
4314f
2
LTC4314
ELECTRICAL CHARACTERISTICS
SYMBOL
V
CC
V
DD, BUS
V
CC2
I
CC
I
CC(DISABLED)
I
CC2
t
UVLO
V
TH_UVLO
Buffers
V
OS(SAT)
V
OS2(SAT)
V
OS
V
OS2
V
IL,FALLING
V
IL,RISING
I
LEAK
C
IN
dV/dt (RTA)
V
RTA(TH)
ΔV
ACC
I
RTA
Buffer Offset Voltage
Buffer Offset Voltage
Buffer Offset Voltage
Buffer Offset Voltage
Buffer Input Logic Low Voltage
Buffer Input Logic Low Voltage
Input Leakage Current
Input Capacitance
Minimum Slew Rate Requirement
Rise Time Accelerator DC
Threshold Voltage
I
OL
= 4mA, Driven V
SDAIN, SCLIN
= 50mV
I
OL
= 500μA, Driven V
SDAIN, SCLIN
= 50mV
I
OL
= 4mA, Driven V
SDAOUT, SCLOUT
= 50mV
I
OL
= 500μA, Driven V
SDAOUT, SCLOUT
= 50mV
I
OL
= 4mA, Driven V
SDAIN, SCLIN
= 200mV
I
OL
= 500μA, Driven V
SDAIN, SCLIN
= 200mV
I
OL
= 4mA, Driven V
SDAOUT,SCLOUT
= 200mV
I
OL
= 500μA, Driven V
SDAOUT,SCLOUT
= 200mV
SDA, SCL Pins (Notes 4, 5)
SDA, SCL Pins;
ACC
Grounded
SDA, SCL Pins;
ACC
Open or High (Notes 4, 5)
SDA, SCL Pins; V
CC
, V
CC2
= 0V, 5.5V
SDA, SCL Pins (Note 6)
SDA, SCL Pins; V
CC
= V
CC2
= 5V
SDA, SCL Pins; V
CC
= V
CC2
= 5V,
ACC
Grounded
ACC
Open or High, V
CC
= V
CC2
= 5V (Note 4)
ACC
Open, V
CC
= V
CC2
= 5V (Note 4)
Rise Time Accelerator
Pull-Up Current
SDA, SCL Pins; V
CC
= V
CC2
= 5V,
ACC
Grounded (Note 7)
ACC
Open, V
CC
= V
CC2
= 5V (Note 7)
Enable/Control
V
DISCEN(TH)
V
EN(TH)
ΔV
EN(HYST)
DISCEN Threshold Voltage
ENABLE1-4 Threshold Voltage
ENABLE1-4 Hysteresis Voltage
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= V
CC2
= 3.3V unless otherwise noted.
PARAMETER
Input Supply Voltage
2-Wire Bus Supply Voltage
Output Side Accelerator Supply
Voltage
Input Supply Current
Input Supply Current
V
CC2
Supply Current
UVLO Delay
UVLO Threshold
One or More V
ENABLE1-4
= V
CC
= V
CC2
= 5.5V
(Note 3)
V
ENABLE1-4
= 0V, V
CC
= V
CC2
= 5.5V (Note 3)
One or More V
ENABLE1-4
= V
CC
= V
CC2
= 5.5V
(Note 3)
CONDITIONS
l
l
l
l
l
l
l
l
MIN
2.9
2.25
2.25
6.0
1.6
0.35
60
TYP
MAX
5.5
5.5
5.5
UNITS
V
V
V
mA
mA
mA
μs
V
mV
Power Supply/Start-Up
7.3
2.2
0.5
110
2.3
200
9
3.5
0.6
200
2.6
V
CC_UVLO(HYST)
UVLO Threshold Hysteresis Voltage
130
15
90
15
50
15
35
15
0.5
220
60
190
55
130
55
95
50
0.6
280
120
260
110
195
110
170
100
0.7
±10
<20
mV
mV
mV
mV
mV
mV
mV
mV
V
V
V
μA
pF
V/μs
V
V
mV
mV
0.3•V
MIN
0.33•V
MIN
0.36•V
MIN
0.3•V
MIN
0.33•V
MIN
0.36•V
MIN
Rise Time Accelerators
0.1
0.7
100
20
1.5
0.8
0.8
0.2
0.8
200
35
3
1.4
20
l
0.4
0.9
l
0.36•V
MIN
0.4•V
MIN
0.44•V
MIN
l
0.05•V
MIN
0.07•V
MIN
Buffers Off to Accelerator On Voltage SDA, SCL Pins; V
CC
= V
CC2
= 5V,
ACC
Grounded
45
4
2
2
mA
mA
V
mV
V
mV
4314f
ΔV
DISCEN(HYST)
DISCEN Hysteresis Voltage
1.4
20
3
LTC4314
ELECTRICAL CHARACTERISTICS
SYMBOL
t
LH_EN
I
LEAK
I
ACC(IN,
HL)
I
ACC(IN,
Z)
I
ACC(EN,
Z)
V
ACC(L,
TH)
V
ACC(H,TH)
t
TIMEOUT
V
FAULT(OL)
I
FAULT(OH)
f
SCL(MAX)
t
PDHL
t
f
PARAMETER
ENABLE1-4 High to Buffer Active
Input Leakage Current
ACC
High, Low Input Current
Allowable Leakage Current in
Open State
ACC
High Z Input Current
ACC
Input Low Threshold Voltages
ACC
Input High Threshold Voltages
Bus Stuck Low Timer
FAULT
Output Low Voltage
FAULT
Leakage Current
I
2
C Frequency Max
SCL, SDA Fall Delay
SCL, SDA Fall Times
(Note 6)
V
CC
= 3V to 5.5V, C
BUS
= 50pF I
BUS
= 1mA (Note 6)
,
V
CC
= 3V to 5.5V, C
BUS
= 50pF I
BUS
= 1mA (Note 6)
,
DISCEN = ENABLE1–4 Pins = 5.5V
V
CC
= 5V, V
ACC
= 5V, 0V
V
CC
= 5V
V
CC
= 5V
V
CC
= 5V
V
CC
= 5V
SDAOUT or SCLOUT < 0.3•V
CC
I
FAULT
= 3mA
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= V
CC2
= 3.3V unless otherwise noted.
CONDITIONS
l
l
l
l
l
l
l
l
l
l
l
MIN
TYP
0.56
0.1
±23
MAX
1
±10
±40
±5
UNITS
μs
μA
μA
μA
μA
±5
0.2•V
CC
0.7•V
CC
35
0.3•V
CC
0.8•V
CC
45
0.1
400
60
10
100
0.4•V
CC
0.9•V
CC
55
0.4
±5
V
V
ms
V
μA
kHz
ns
ns
Stuck Low Timeout Circuitry
I
2
C Interface Timing
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
All currents into pins are positive and all voltages are referenced to
GND unless otherwise indicated.
Note 3:
SDAIN, SCLIN pulled low.
Note 4:
V
MIN
= minimum of V
CC
and V
CC2
if V
CC2
> 2.25V else V
MIN
= V
CC
.
Note 5:
V
IL
is tested for the following (V
CC
, V
CC2
) combinations:
(2.9V, 5.5V), (5.5V, 2.25V), (3.3V, 3.3V) and (5V, 0V).
Note 6:
Guaranteed by design and not tested.
Note 7:
Measured in a special DC mode with V
SDA,SCL
= V
RTA(TH)
+ 1V.
The transient I
RTA
seen during rising edges when
ACC
is low will depend
on the bus loading condition and the slew rate of the bus. The LTC4314’s
internal slew rate control circuitry limits the maximum bus rise rate to
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Embedded System
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