EXPOSED PAD (PIN 9) CONNECTION TO GROUND IS OPTIONAL
MS8 PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 200°C/W
ORDER INFORMATION
LEAD FREE FINISH
LTC4308CDD#PBF
LTC4308IDD#PBF
LTC4308CMS8#PBF
LTC4308IMS8#PBF
TAPE AND REEL
LTC4308CDD#TRPBF
LTC4308IDD#TRPBF
LTC4308CMS8#TRPBF
LTC4308IMS8#TRPBF
PART MARKING*
LBTT
LBTT
LTBTS
LTBTS
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
TEMPERATURE RANGE
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *Temperature grades are 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/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, unless otherwise noted.
SYMBOL
Power Supply
V
CC
I
CC
I
SD
V
PRE
Positive Supply Voltage
Supply Current
Shutdown Supply Current
Precharge Voltage
V
CC
= 5.5V, V
SCLOUT
= V
SDAOUT
= 0V (Note 6)
V
CC
= 5.5V, ENABLE = 0V
SDAOUT, SCLOUT Open
l
l
l
l
ELECTRICAL CHARACTERISTICS
PARAMETER
CONDITIONS
MIN
2.3
TYP
MAX
5.5
UNITS
V
mA
μA
V
4308f
7
900
0.8
1
11
1400
1.2
2
LTC4308
ELECTRICAL CHARACTERISTICS
SYMBOL
t
IDLE
V
THR_EN
V
THR_EN(HYST)
I
ENABLE
t
PLH_EN
t
PHL_EN
t
PLH_READY
t
PHL_READY
V
OL_READY
I
OFF_READY
t
PHL
t
PLH
t
RISE
t
FALL
I
PULLUPAC
PARAMETER
Bus Idle Time
ENABLE Threshold Voltage
ENABLE Threshold Voltage Hysteresis
ENABLE Input Current
ENABLE Delay Off-On
ENABLE Delay On-Off
READY Delay Off-On
READY Delay On-Off
READY Output Low Voltage
READY Off Leakage Current
SDA/SCL Propagation Delay High to Low
SDA/SCL Propagation Delay Low to High
SDA/SCL Transition Time Low to High
SDA/SCL Transition Time High to Low
Transient Boosted Pull-Up Current
ENABLE Rising Edge
(Note 3)
ENABLE from 0V to V
CC
(Figure 1)
(Note 3), (Figure 1)
(Note 3), (Figure 1)
(Note 3), (Figure 1)
I
READY
= 3mA, V
CC
= 2.3V
V
CC
= READY = 5.5V
C
LOAD
= 50pF 2.7k to V
CC
on SDA, SCL,
,
(Notes 2, 3), (Figure 1)
C
LOAD
= 50pF 2.7k to V
CC
on SDA, SCL,
,
(Notes 2, 3), (Figure 1)
C
LOAD
= 100pF 10k to V
CC
on SDA, SCL,
,
(Notes 3, 4), (Figure 1)
C
LOAD
= 100pF 10k to V
CC
on SDA, SCL,
,
(Notes 3, 4), (Figure 1)
Positive Transition > 0.8V/μs on SDAOUT,
SCLOUT (Note 5)
2.7k to V
CC
on SDAOUT, SCLOUT,
SDAIN = SCLIN = 0.2V
2.7k to V
CC
on SDAOUT, SCLOUT,
SDAIN = SCLIN = 0.4V, V
CC
= 5.5V
Output to Input Offset Voltage (IN – OUT)
2.7k to V
CC
on SDAIN, SCLIN,
SDAOUT = SCLOUT = 0.4V
2.7k to V
CC
on SDAIN, SCLIN,
SDAOUT = SCLOUT = 0.4V, V
CC
= 5.5V
V
THR
SDAOUT, SCLOUT Logic Input Threshold Voltage V
CC
≥ 2.9V
V
CC
< 2.9V
SDAIN, SCLIN Logic Input Threshold Voltage
V
THR(HYST)
SDAIN, SCLIN Rising Edge, V
CC
= 2.3V, 5.5V
SDAOUT, SCLOUT Logic Input Threshold Voltage (Note 3)
Hysteresis
SDAIN, SCLIN Logic Input Threshold Voltage
Hysteresis
C
IN
I
LEAK
V
OL
Digital Input Capacitance SDAIN, SDAOUT,
SCLIN, SCLOUT
Input Leakage Current
Output Low Voltage
(Note 3)
(Note 3)
SDA, SCL Pins
SDAOUT, SCLOUT Pins, I
SINK
= 4mA,
SDAIN = SCLIN = 0V, V
CC
= 2.7V
2.7k to V
CC
on SDAOUT, SCLOUT,
SDAIN = SCLIN = 0V
V
ILMAX
Buffer Input Logic Low Voltage
SDAOUT, SCLOUT Pins
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
= 3.3V, unless otherwise noted.
CONDITIONS
l
l
MIN
55
0.45
TYP
95
0.6
35
0.1
95
10
10
10
MAX
175
0.75
±5
UNITS
μs
V
mV
μA
μs
ns
ns
ns
0.4
0.1
70
10
30
30
5
8
300
300
±5
V
μA
ns
ns
ns
ns
mA
Prop Delay and Rise-Time Accelerators
Input-Output Connection
V
OS
Input to Output Offset Voltage (OUT – IN)
250
250
–150
–150
1.4
1.1
0.45
300
350
–200
–250
1.65
1.35
0.6
50
35
10
±5
0
250
300
400
380
1.2
380
450
–300
–350
1.9
1.6
0.75
mV
mV
mV
mV
V
V
V
mV
mV
pF
μA
mV
mV
V
4308f
3
LTC4308
ELECTRICAL CHARACTERISTICS
SYMBOL
t
TIMEOUT
f
I2C,MAX
t
BUF
t
HD,STA
t
SU,STA
t
SU,STO
t
HD,DATI
t
SU,DAT
PARAMETER
Bus Stuck Low Timer
I
2
C Maximum Operating Frequency
Hold Time After (Repeated) Start Condition
Repeated Start Condition Set-Up Time
Stop Condition Set-Up Time
Data Hold Time Input
Data Set-Up Time
Bus Stuck Low Timeout
SDAOUT = SCLOUT = 0V
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
(Note 3)
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 3.3V, unless otherwise noted.
CONDITIONS
MIN
25
400
TYP
30
600
1.3
100
0
0
0
100
MAX
35
UNITS
ms
kHz
μs
ns
ns
ns
ns
ns
Timing Characteristics
Bus Free Time Between Stop and Start Condition (Note 3)
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:
See “Propagation Delays” in the Operations section for a
discussion of t
PHL
and t
PLH
as a function of pull-up resistance and bus
capacitance.
Note 3:
Determined by design, not tested in production.
Note 4:
Measure points are 0.3 • V
CC
and 0.7 • V
CC
.
Note 5:
I
PULLUPAC
varies with temperature and V
CC
voltage as shown in the
Typical Performance Characteristics section.
Note 6:
I
CC
test performed with connection circuitry active.
Note 7:
All currents into pins are positive; all voltages are referenced to
GND unless otherwise specified.
TIMING DIAGRAMS
ENABLE, CONNECT, READY Timing
t
PLH_READY
t
PLH_EN
ENABLE
t
PHL_READY
t
PHL_EN
CONNECT
READY
4308 TD01
Rising and Falling Propagation Delays and Rise and Fall Times for SDAIN, SDAOUT and SCLIN, SCLOUT
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Test/Measurement
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