s-35392a Seiko Instruments Inc., s-35392a Datasheet - Page 7

• Manufacturer Part Number: s-35392a
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.1.3
AC Electrical Characteristics
*1. Since the output format of the SDA pin is Nch open-drain output, SDA output delay time is determined by the values of
*2. Regarding the power supply voltage, refer to “ Recommended Operation Conditions”.
(Output from
(Input from
S-35392A)
S-35392A)
SCL clock frequency
SCL clock low time
SCL clock high 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, SDA rise time
SCL, SDA fall time
Bus release time
Noise suppression time
Input pulse voltage
Input pulse rise/fall time
Output determination voltage
Output load
the load resistance (R
SCL
SDA
SDA
_00
Table 7 Measurement Conditions
Parameter
*1
L
) and load capacity (C
t
SU.STA
V
20 ns
V
100 pF + pull-up resistor 1 kΩ
IH
OH
t
HD.STA
= 0.9 × V
= 0.5 × V
Table 8 AC Electrical Characteristics
t
F
t
PD
DD
Seiko Instruments Inc.
DD
Figure 7 Bus Timing
f
t
t
t
t
t
t
t
t
t
t
t
t
, V
Symbol
SCL
LOW
HIGH
PD
SU.STA
HD.STA
SU.DAT
HD.DAT
SU.STO
R
F
BUF
I
L
, V
) outside the IC. Therefore, use this value only as a reference value.
IL
OL
= 0.1 × V
= 0.5 × V
t
HIGH
Min.
250
4.7
4.7
4.7
4.7
DD
0
4
−
4
0
−
−
−
t
DD
HD.DAT
V
DD
t
LOW
*2
Typ.
t
≥ 1.3 V
SU.DAT
−
−
−
−
−
−
−
−
−
−
−
−
−
Remark
SDA
Max.
100
100
3.5
0.3
Figure 6 Output Load Circuit
−
−
−
−
2-WIRE REAL-TIME CLOCK
−
−
−
−
1
The power supplies of the IC
and load have the same
electrical potential.
Min.
100
1.3
0.6
0.6
0.6
0.6
1.3
0
−
0
−
−
−
V
DD
*2
V
Typ.
DD
≥ 3.0 V
−
−
−
−
−
−
−
−
−
−
−
−
−
t
R
(Ta = −40 to +85°C)
R = 1 kΩ
C = 100 pF
t
SU.STO
Max.
S-35392A
400
0.9
0.3
0.3
50
−
−
−
−
−
−
−
−
t
BUF
Unit
kHz
µs
µs
µs
µs
µs
µs
µs
µs
µs
µs
ns
ns
7