RS5C348A RICOH Co.,Ltd., RS5C348A Datasheet - Page 6

• Manufacturer Part Number: RS5C348A
• Description: 4-wire Serial Interface Real-time Clock
• Manufacturer: RICOH Co.,Ltd.

Rx5C348A/B
Rev.2.01
Symbol
Unless otherwise specified: VSS=0V,Topt=-40 to +85°C
Input and Output Conditions: VIH=0.8×VDD,VIL=0.2×VDD,VOH=0.8×VDD,VOL=0.2×VDD,CL=50pF
AC ELECTRICAL CHARACTERISTICS
t
t
t
f
t
t
t
t
t
t
t
t
CE
SCLK
CES
CEH
CR
SCLK
CKH
CKL
CKS
RD
RZ
CEZ
DS
DH
12345
SO
SI
*) For reading/writing timing, see “P.28.
Item
CE Set-up Time
CE Hold Time
CE Recovery Time
SCLK Clock
Frequency
SCLK Clock High
Time
SCLK Clock Low
Time
SCLK Set-up Time
Data Output Delay
Time
Data Output Floating
Time
Data Output Delay
Time After Falling of
CE
Input Data
Set-up Time
Input Data
Hold Time
t
CKS
t
CES
t
RD
t
CKH
Condi-
tions
t
DS
t
t
CKL
DH
Adjustment of Oscillation frequency”.
VDD≥2.0V
Min.
400
400
62
400
400
200
200
200
t
RD
Typ.
- 6 -
Max.
t
1.0
300
300
300
RZ
VDD≥4.5V
Min.
t
200
200
62
200
200
100
100
100
CEH
t
CEZ
Typ.
t
CR
Max.
2.0
150
150
150
Unit
ns
ns
µs
M
Hz
ns
ns
ns
ns
ns
ns
ns
ns