PT7C4363 Просмотр технического описания (PDF) - Pericom Semiconductor
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PT7C4363 Datasheet PDF : 22 Pages
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Data Sheet
PT7C4363
Real-time Clock Module (I2C Bus)
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AC Electrical Characteristics
Sym
Description
VHM
Rising and falling threshold voltage high
VHL
Rising and falling threshold voltage low
Value
Unit
0.8 VCC
V
0.2 VCC
V
Signal
tf
VHM
VLM
tr
Over the operating range
Symbol
Item
fSCL
SCL clock frequency
tSU;STA
START condition set-up time
tHD;STA
START condition hold time
tSU;DAT
Data set-up time (RTC read/write)
tHD;DAT1
Data hold time (RTC write)
tHD;DAT2
Data hold time (RTC read)
tSU;STO
STOP condition setup time
tBUF
Bus idle time between a START and STOP condition
tLOW
When SCL = "L"
tHIGH
When SCL = "H"
tr
Rise time for SCL and SDA
tf
Fall time for SCL and SDA
tSP*
Allowable spike time on bus
CB
Capacitance load for each bus line
* Note: Only reference for design.
Min.
Typ.
Max.
Unit
400
kHz
0.6
µs
0.6
µs
200
ns
35
ns
0
µs
0.6
µs
1.3
µs
1.3
µs
0.6
µs
0.3
µs
0.3
µs
50
ns
400
pF
S
SCL
SDA
tHD;STA
tLOW
fSCL
tSU;DAT
tHIGH
tHD;DAT
Sr
tHD;STA
tSU;STA
P
tSU;STA
tSP
tBUF
tSU;STO
tHD;STA
S Start condition
Sr Restart condition
P Stop condition
PT0207(07/05)
19
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