S-35720 Series
WAKE-UP TIMER IC
www.ablic.com
© ABLIC Inc., 2019
PIN-SELECTABLE WAKE-UP TIMER IC
Rev
.
1.0
_00
The wake-up timer IC allows for intermittent system operation by periodically waking up the system.
The S-35720 Series compares the timer value and the value set to the SET0 pin and the SET1 pin, and outputs a wake-up
signal (interrupt signal) when the values match each other.
The timer of the S-35720 is a 24-bit binary-up counter.
4 types of wake-up time (interrupt time) can be selected depending on the SET0 pin and the SET1 pin settings.
Features
•
Wake-up function
(Alarm interrupt function):
•
•
•
•
•
Settable wake-up time (interrupt time)
Selectable as the option on the second time scale from 1 second to 194 days
(Approximately half a year)
Low current consumption:
0.2
μA
typ. (Quartz crystal: C
L
= 6.0 pF, V
DD
= 3.0 V, Ta =
+25°C)
Wide range of operation voltage:
1.8 V to 5.5 V
Built-in 32.768 kHz crystal oscillation circuit
Operation temperature range:
Ta =
−40°C
to
+85°C
Lead-free (Sn 100%), halogen-free
Applications
•
•
•
•
•
IoT communications device
Monitoring device
Security device
Battery system
Energy harvesting system
Package
•
TMSOP-8
1
WAKE-UP TIMER IC
Rev.1.0
_00
Product Name Structure
1. Product name
S-35720
C
xx
I
-
K8T2
U
PIN-SELECTABLE WAKE-UP TIMER IC
S-35720 Series
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specification
*1
K8T2: TMSOP-8, Tape
Operation temperature
I:
Ta =
−40°C
to
+85°C
Option code
01, 02
Fixed value
C:
Quartz crystal C
L
= 6.0 pF
Product name
*1.
Refer to the tape drawing.
2. Package
Table 1
Package Name
TMSOP-8
Dimension
FM008-A-P-SD
Package Drawing Codes
Tape
FM008-A-C-SD
Reel
FM008-A-R-SD
3. Product name list
Table 2
Product Name
S-35720C01I-K8T2U
_______
RST Pin
INT Pin
Output Form
Time-out Type
SET0 Pin, SET1 Pin Settings (SET0, SET1)
0, 0
0, 1
1, 0
1, 1
10 s
10 s
30 s
30 s
1s
1s
With pull-up
resistor
With pull-up
S-35720C02I-K8T2U
resistor
*1.
Nch open-drain One-shot loop time-out
60 s
output
(7.8 ms
*1
)
One-shot loop time-out
CMOS output
60 s
(125 ms
*1
)
Values of pulse width. Refer to "
INT Pin Interrupt Signal Output"
for the details.
3
WAKE-UP TIMER IC
Rev.1.0
_00
Pin Functions
1. SET0, SET1 (Input for interrupt time setting) pins
PIN-SELECTABLE WAKE-UP TIMER IC
S-35720 Series
These pins input the interrupt time setting signal. After the RST pin changes from "L" to "H", the S-35720 Series
takes the values set to the SET0 pin and the SET1 pin. As a result, even if the SET0 pin and the SET1 pin settings are
changed during timer count-up action, the interrupt time does not change.
4 types of interrupt time can be selected depending on the SET0 pin and the SET1 pin settings.
_______
2. RST (Input for reset signal) pin
_______
This pin inputs the reset signal. The timer is reset when inputting "L" to
_______
RST pin. The INT pin is set to "H" when
the
_______
inputting "H" to the RST pin, and the timer starts the operation. The RST pin has a built-in chattering elimination
_______
circuit. Regarding the chattering elimination circuit, refer to "
Chattering Elimination of RST Pin".
Besides, S-35720C01I and S-35720C02I are the products with pull-up resistor.
_______
3. INT (Output for interrupt signal) pin
This pin outputs an interrupt signal. The interrupt signal is output when the time set to the SET0 pin and the SET1 pin
comes. The interrupt signal output (time-out type) is one-shot loop time-out. Regarding the operation of the interrupt
signal output, refer to "
INT Pin Interrupt Signal Output".
Besides, S-35720C01I is the Nch open-drain output product, and S-35720C02I is the CMOS output product.
4. XIN, XOUT (Connection for quartz crystal) pins
Connect a quartz crystal between the XIN pin and the XOUT pin.
5. VDD (Positive power supply) pin
Connect this pin with a positive power supply.
Regarding the values of voltage to be supplied, refer to "
Recommended Operation Conditions".
6. VSS pin
Connect this pin to GND.
5
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