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PT7C4337 Datasheet(PDF) 6 Page - Pericom Semiconductor Corporation

Part # PT7C4337
Description  Real-time Clock Module
PDF  23 Pages
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Manufacturer  PERICOM [Pericom Semiconductor Corporation]
Direct Link  http://www.pericom.com
Logo PERICOM - Pericom Semiconductor Corporation

PT7C4337 Datasheet(HTML) 6 Page - Pericom Semiconductor Corporation

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2013-06-0002
PT0205-9
06/18/13
6
PT7C4337
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
CI/O *
I/O Capacitance (SDA, SCL)
-
-
10
pF
TOSF
Oscillator Stop Flag (OSF) Delay
-
-
100
ms
* 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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