LTC4307 Просмотр технического описания (PDF) - Linear Technology
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LTC4307 Datasheet PDF : 16 Pages
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LTC4307
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 3.3V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Propagation Delay and Rise-Time Accelerators
tPHL
SDA/SCL Propagation Delay High to Low CLOAD = 50pF, 2.7k to VCC on SDA, SCL,
VCC = 3.3V (Notes 2, 3) (Figure 1)
tPLH
SDA/SCL Propagation Delay Low to High CLOAD = 50pF, 2.7k to VCC on SDA, SCL,
VCC = 3.3V (Notes 2, 3) (Figure 1)
tRISE
SDA/SCL Transition Time Low to High
CLOAD = 100pF, 10k to VCC on SDA, SCL, VCC
= 3.3V (See Notes 3, 4) (Figure 1)
70
ns
10
ns
30
300
ns
tFALL
SDA/SCL Transition Time High to Low
CLOAD = 100pF, 10k to VCC on SDA, SCL, VCC
= 3.3V (See Notes 3, 4) (Figure 1)
30
300
ns
IPULLUPAC
Transient Boosted Pull-Up Current
Positive Transition on SDA, SCL, VCC = 3.3V
5
8
mA
(Note 5)
Input-Output Connection
VOS
Input-Output Offset Voltage
2.7k to VCC on SDA, SCL, VCC = 3.3V,
Driven SDA/SCL = 0.2V
● 20
60
100
mV
VTHR
SDA, SCL Logic Input Threshold Voltage Rising Edge
VHYS
SDA, SCL Logic Input Threshold Voltage (Note 3)
Hysteresis
0.45VCC 0.55VCC 0.65VCC
V
50
mV
CIN
Digital Input Capacitance SDAIN, SDAOUT, (Note 3)
SCLIN, SCLOUT
10
pF
ILEAK
Input Leakage Current
VOL
Output Low Voltage
SDA, SCL, Pins
SDA, SCL Pins, ISINK = 4mA,
Driven SDA/SCL = 0.2V, VCC = 2.7V
2.7k to VCC on SDA, SCL, VCC = 3.3V,
Driven SDA/SCL = 0.1V
●
●0
±5
μA
0.4
V
● 120
160
205
mV
VILMAX
Buffer Input Logic Low Voltage
Bus Stuck Low Timeout
VCC = 3.3V
●
1.2
V
tTIMEOUT
Bus Stuck Low Timer
Timing Characteristics
VCC = 3.3V, SDAOUT, SCLOUT = 0V
● 25
30
35
ms
fI2C,MAX
tBUF
I2C Maximum Operating Frequency
Bus Free Time Between Stop and Start
Condition
(Note 3)
(Note 3)
400
600
kHz
1.3
μs
tHD,STA
tSU,STA
Hold Time After (Repeated) Start Condition (Note 3)
Repeated Start Condition Set-Up Time
(Note 3)
100
ns
0
ns
tSU,STO
tHD,DATI
tSU,DAT
Stop Condition Set-Up Time
Data Hold Time Input
Data Set-Up Time
(Note 3)
(Note 3)
(Note 3)
0
ns
0
ns
100
ns
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 tPHL and tPLH 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 • VCC and 0.7 • VCC.
Note 5: IPULLUP varies with temperature and VCC voltage as shown in the
Typical Performance Characteristics section.
Note 6: ICC test performed with connection circuitry active.
Note 7: All currents into pins are positive; all voltages are referenced to
GND unless otherwise specified.
4307f
3
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