S-35190A-T8T1G Seiko Instruments, S-35190A-T8T1G Datasheet - Page 37

• Manufacturer Part Number: S-35190A-T8T1G
• Description: IC REAL TIME CLOCK 3WIRE 8-TSSOP
• Manufacturer: Seiko Instruments
• Type: Clock/Calendarr

Specifications of S-35190A-T8T1G

• Time Format: HH:MM:SS (12/24 hr)
• Date Format: YY-MM-DD-dd
• Interface: 3-Wire Serial
• Voltage - Supply: 1.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP
• Function: Clock/Calendar/Alarm/Battery Backup/Interrupt
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.3 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial (3-Wire)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Rev.3.0
2. Measurement of oscillation frequency
When the S-35190A is turned on, the internal power-on detection circuit operates and a signal of 1 Hz is output from the
frequency counter following the circuit configuration shown in Figure 46 .
If 1 Hz signal is not output, the power-on detection circuit does not operate normally. Turn off the power and then turn it
on again. For how to apply power, refer to “ Power-on Detection circuit and Register Status” .
Caution
INT pin to select the crystal oscillator and optimize the C
Remark If the error range is ± 1 ppm in relation to 1 Hz, the time is shifted by approximately 2.6 seconds per month
_00
10 kΩ
Open
(calculated using the following expression).
10
1. Use a high-accuracy frequency counter of 7 digits or more.
2. Measure the oscillation frequency under the usage conditions.
3. Since the 1 Hz signal continues to be output, initialization must be executed during normal
–6
(1 ppm) × 60 seconds × 60 minutes × 24 hours × 30 days = 2.592 seconds
operation.
10 kΩ
Figure 46 Configuration of Oscillation Frequency Measurement Circuit
SIO
SCK
CS
S-35190A
Seiko Instruments Inc.
XOUT
VDD
VSS
XIN
INT
g
value. Turn the power on and measure the signal with a
C
3-WIRE REAL-TIME CLOCK
g
10 kΩ
Frequency
counter
S-35190A
37