S-35390A Seiko Instruments, S-35390A Datasheet - Page 7

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

*1. Since the output format of the SDA pin is Nch open-drain output, the SDA output delay time is determined
Rev.1.2
SCL clock frequency
SCL clock “L” time
SCL clock “H” time
SDA output delay time
Start condition setup time
Start condition hold time
Data input setup time
Data input hold time
Stop condition setup time
SCL and SDA rise time
SCL and SDA fall time
Bus release time
Noise suppression time
by the values of the load resistance (R
only as a reference value.
Input pulse voltage
Input pulse rise/fall time
Output determination voltage
Output load
AC Electrical Characteristics
_00
Table 7 Measurement Conditions
Parameter
*1
0.1 × V
20 ns
0.5 × V
100 pF + pull-up resistor 1 kΩ
Table 8 AC Characteristics
L
DD
DD
) and load capacity (C
Seiko Instruments Inc.
to 0.9 × V
Symbol
t
t
t
t
t
HD. DAT
SU. STO
SU. STA
HD. STA
SU. DAT
t
t
t
f
HIGH
LOW
t
BUF
SCL
t
PD
t
t
R
F
I
DD
Min.
250
4.7
4.7
4.7
4.7




V
0
4
4
0
DD
= 1.3 to 5.5 V
L
) outside the IC. Therefore, use this value
Typ.













Remark The power supplies of the IC
and load have the same
electrical potential.
SDA
Figure 5 Output Load Circuit
Max.
2-WIRE REAL-TIME CLOCK
100
100
3.5
0.3








1
Min.
100
0.9
0.6
0.6
1.3





V
0
1
0
DD
= 3.0 to 5.5 V
V
Typ.
DD
(Ta = −40 to +85°C)













R = 1 kΩ
C = 100 pF
S-35390A
Max.
400
0.9
0.3
0.3
50








Unit
kHz
µs
µs
µs
µs
µs
ns
ns
µs
µs
µs
µs
ns
7