参数资料
型号: PT7C4307PE
厂商: PERICOM SEMICONDUCTOR CORP
元件分类: XO, clock
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDIP8
封装: LEAD FREE, MS-001BA, DIP-8
文件页数: 9/20页
文件大小: 517K
代理商: PT7C4307PE
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PT0206(02/05)
Ver: 0
17
Preliminary Data Sheet
PT7C4307
Real-time Clock Module (I
2C Bus)
AC Electrical Characteristics
Sym
Description
Value
Unit
VHM
Rising and falling threshold voltage high
0.8 VCC
V
VHL
Rising and falling threshold voltage low
0.2 VCC
V
Over the operating range
Symbol
Item
Min.
Typ.
Max.
Unit
fSCL
SCL clock frequency
400
kHz
tSU;STA
START condition set-up time
0.6
s
tHD;STA
START condition hold time
0.6
s
tSU;DAT
Data set-up time (RTC read/write)
200
ns
tHD;DAT1
Data hold time (RTC write)
35
ns
tHD;DAT2
Data hold time (RTC read)
0
s
tSU;STO
STOP condition setup time
0.6
s
tBUF
Bus idle time between a START and STOP condition
1.3
s
tLOW
When SCL = "L"
1.3
s
tHIGH
When SCL = "H"
0.6
s
tr
Rise time for SCL and SDA
0.3
s
tf
Fall time for SCL and SDA
0.3
s
tSP*
Allowable spike time on bus
50
ns
CB
Capacitance load for each bus line
400
pF
* Note: only reference for design
Signal
tf
tr
VHM
VLM
S
Sr
P
t
HD;STA
t
SP
t
SU;DAT
t
HD;STA
t
HD;DAT
t
SU;STA
t
SU;STO
SCL
SDA
t
BUF
t
HD;STA
t
SU;STA
f
SCL
t
LOW
t
HIGH
Sr
S
P
Start condition
Restart condition
Stop condition
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