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RS5C348A Datasheet(PDF) 9 Page - RICOH electronics devices division

Part # RS5C348A
Description  4-WIRE SERIAL INTERFACE REAL-TIME CLOCK ICs WITH VOLTAGE MONITORING FUNCTION?
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Manufacturer  RICOH [RICOH electronics devices division]
Direct Link  http://www.ricoh.com
Logo RICOH - RICOH electronics devices division

RS5C348A Datasheet(HTML) 9 Page - RICOH electronics devices division

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R
×5C348A/B
6
Symbol
Item
Conditions
VDD
≥2.0V
VDD
≥4.5
Unit
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
tCES
CE Set-up Time
400
200
ns
tCEH
CE Hold Time
400
200
ns
tCR
CE Recovery Time
62
62
µs
fSCLK
SCLK Clock Frequency
1.0
2.0
MHz
tCKH
SCLK Clock “H” Time
400
200
ns
tCKL
SCLK Clock “L” Time
400
200
ns
tCKS
SCLK Set-up Time
200
100
ns
tRD
Data Output Delay Time
300
150
ns
tRZ
Data Output Floating Time
300
150
ns
tCEZ
Data Output Floating Time
300
150
ns
After Falling of CE
tDS
Input Data Set-up Time
200
100
ns
tDH
Input Data Hold Time
200
100
ns
AC ELECTRICAL CHARACTERISTICS
Unless otherwise specified : Vss=0V,Topt=–40 to +85˚C
Input/output condition : VIH=0.8
×VDD, VIL=0.2×VDD, VOH=0.8×VDD, VOL=0.2×VDD, CL=50pF
CE
SCLK
SI
SO
tCKH
tCKL
tCKS
tCES
tDS
tDH
tRD
tRD
tRZ
tCEZ
tCEH
tCR
*) For read/write timing, see “USAGES, 1.5 Considerations in Reading and Writing Time Data”.


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