S-1410H50-K8T2U4 [SII]
Watchdog operation is switchable;
| 型号： | S-1410H50-K8T2U4 |
| 厂家： | 
SEIKO INSTRUMENTS INC |
| 描述： | Watchdog operation is switchable |
| 文件： | 总36页 (文件大小：3310K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
S-1410/1411 Series
LOW CURRENT CONSUMPTION WATCHDOG TIMER
WITH RESET FUNCTION
www.sii-ic.com
© SII Semiconductor Corporation, 2015-2016
Rev.2.0_00
The S-1410/1411 Series is a watchdog timer developed using CMOS technology, which can operate with low current
consumption of 3.8 μA typ. The reset function and the low voltage detection function are available.
Features
• Detection voltage:
• Detection voltage accuracy:
• Input voltage:
2.0 V to 5.0 V, selectable in 0.1 V step
1.5%
VDD = 0.9 V to 6.0 V
• Hysteresis width:
5% typ.
• Current consumption:
3.8 μA typ.
• Reset time-out period:
14.5 ms typ. (CPOR = 2200 pF)
• Watchdog operation is switchable:
• Watchdog operation voltage range:
• Watchdog mode switching function*1:
• Watchdog input edge is selectable:
• Product type is selectable:
Enable, Disable
2.5 V to 6.0 V
Time-out mode, window mode
Rising edge, falling edge, both rising and falling edges
S-1410 Series___
________
(Product with W / T pin (Output: WDO pin))
S-1411 Series
___
_______
________
(Product without W / T pin (Output: RST pin, WDO pin))
• Operation temperature range:
Ta = −40°C to +105°C
• Lead-free (Sn 100%), halogen-free
*1. The S-1411 Series is fixed to the window mode.
Applications
• Power supply monitoring of microcontroller mounted apparatus and system monitoring
Packages
• TMSOP-8
• HSNT-8(2030)
1
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Block Diagrams
____
1. S-1410 Series (Product with W / T pin)
CWDT
VDD
Noise
filter
WEN
WDI
Noise
filter
WDT circuit
Noise
filter
W / T
WDO
Voltage detection
circuit
Reference
voltage
circuit
VSS
CPOR
Figure 1
____
2. S-1411 Series (Product without W / T pin)
CWDT
VDD
Noise
filter
WEN
WDI
WDT circuit
Noise
filter
RST
WDO
Voltage detection
circuit
Reference
voltage
circuit
VSS
CPOR
Figure 2
2
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Product Name Structure
Users can select the product type, detection voltage, and package type for the S-1410/1411 Series. Refer to "1.
Product name" regarding the contents of product name, "2. Product type list" regarding the product types, "3.
Packages" regarding the package drawings.
1. Product name
S-141
x
x
xx
-
xxxx
U
4
Environmental code
U:
Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
K8T2: TMSOP-8, Tape
A8T1: HSNT-8(2030), Tape
Detection voltage
20 to 50
(e.g., when the detection voltage is 2.0 V, it is expressed as 20.)
Product type 1*2
A to L
Product type 2*3
0, 1
*1. Refer to the tape drawing.
*2. Refer to "2. Product type list".
___
*3. 0: S-1410 Series (Product with W / T pin)
________
The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection
circuit.
___
1: S-14_1__1__S__e_ ries (Product without W / T pin)
The WDO pin outputs the signals which are from the watchdog timer circuit and the voltage detection
circuit.
_______
The RST pin outputs the signal which is from the voltage detection circuit.
The watchdog mode is fixed to the window mode.
3
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
2. Product type list
Product Type
Rev.2.0_00
Table 1
Input Edge
WEN Pin Logic
Active "H"
Active "H"
Output Pull-up Resistor
Available
A
B
C
D
E
F
G
H
I
Rising edge
Falling edge
Available
Active "H"
Active "L"
Active "L"
Active "L"
Active "H"
Active "H"
Active "H"
Active "L"
Active "L"
Active "L"
Both rising and falling edges
Rising edge
Available
Available
Falling edge
Available
Both rising and falling edges
Rising edge
Available
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Unavailable
Falling edge
Both rising and falling edges
Rising edge
J
K
L
Falling edge
Both rising and falling edges
3. Packages
Table 2 Package Drawing Codes
Package Name
Dimension
FM008-A-P-SD
PP008-A-P-SD
Tape
Reel
Land
TMSOP-8
FM008-A-C-SD
PP008-A-C-SD
FM008-A-R-SD
PP008-A-R-SD
−
HSNT-8(2030)
PP008-A-L-SD
4
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.0_00
S-1410/1411 Series
Pin Configuration
1. TMSOP-8
___
Table 3 S-1410 Series (Product with W / T pin)
Top view
Pin No.
Symbol
Description
Watchdog mode switching pin
Reset time-out period adjustment pin
Watchdog time adjustment pin
GND pin
_
W / T*1
CPOR
CWDT
VSS
1
2
3
4
5
6
7
8
1
2
3
4
8
7
6
5
WEN
Watchdog enable pin
Watchdog output pin
Figure 3
______
WDO
WDI
Watchdog input pin
VDD
Voltage input pin
___
Table 4 S-1411 Series (Product without W / T pin)
Pin No.
Symbol
Description
Reset output pin
_____
RST
1
2
3
4
5
6
7
8
CPOR
CWDT
VSS
Reset time-out period adjustment pin
Watchdog time adjustment pin
GND pin
WEN
Watchdog enable pin
Watchdog output pin
Watchdog input pin
______
WDO
WDI
VDD
Voltage input pin
___
*1. W / T pin = "H": Time-out mode
___
W / T pin = "L": Window mode
5
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
2. HSNT-8(2030)
___
Table 5 S-1410 Series (Product with W / T pin)
Top view
1
Pin No.
Symbol
Description
Watchdog mode switching pin
Reset time-out period adjustment pin
Watchdog time adjustment pin
GND pin
_
W / T*2
CPOR
CWDT
VSS
8
5
1
2
3
4
5
6
7
8
4
Bottom view
WEN
WDO
WDI
Watchdog enable pin
Watchdog output pin
______
8
1
4
Watchdog input pin
5
VDD
Voltage input pin
*1
Figure 4
___
Table 6 S-1411 Series (Product without W / T pin)
Pin No.
Symbol
Description
Reset output pin
_____
RST
1
2
3
4
5
6
7
8
CPOR
CWDT
VSS
Reset time-out period adjustment pin
Watchdog time adjustment pin
GND pin
WEN
Watchdog enable pin
Watchdog output pin
Watchdog input pin
______
WDO
WDI
VDD
Voltage input pin
*1. Connect the heat sink of backside at shadowed area to the board, and set electric potential open or GND.
However, do not use it as the function of electrode.
___
*2. W / T pin = "H": Time-out mode
___
W / T pin = "L": Window mode
6
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Pin Functions
Refer to " Operation" for details.
____
1. W / T pin (S-1410 Series only)
This is a pin to switch the watchdog mode.
___
The S-1410 Series changes to the time-out mode when the W / T pin is "H", and changes to the window mode
___
when the W / T pin is "L". Switching the mode is prohibited during the operation.
___
The constant current source (0.3 μA typ.) is connected to the W / T pin, and it is pulled down internally.
___
1. 1 Time-out mode (W / T pin = "H")
The S-1410 Series detects an abnormality when not inputting an edge to the WDI pin during the watchdog time-out
________
period (tWDU). And then "L" is output from the WDO pin.
W / T
"H"
(S-1410 only)
t
WDU
t
RST
WDI
(Rising edge)
WDO
Figure 5 Abnormality Detection in Time-out Mode
___
1. 2 Window mode (W / T pin = "L")
When not inputting an edge to the WDI pin during tWDU, or when an edge is input to the WDI pin again within a
specific period of time (the discharge time due to an edge detection + 1 charge-discharge time (tWDL)) after
________
inputting an edge to the WDI pin, the WDO pin output changes from "H" to "L".
W / T
"L"
(S-1410 only)
WDI
(Rising edge)
WDO
t
WDL
tRST
tWDU
t
RST
Figure 6 Abnormality Detection in Window Mode
________
2. RST pin (S-1411 Series only)
This is a reset output pin. It outputs "L" when detecting a low voltage.
_______
Be sure to connect a pull-up resistor to the RST pin in the product without an output pull-up resistor.
3. CPOR pin
This is a pin to connect an external capacitor in order to generate the reset time-out period (tRST).
The capacitor is charged and discharged by an internal constant current circuit, and the charge-discharge duration is
tRST
.
t
RST is calculated by using the following equation.
t
RST = 6,500,000 × CPOR [F] + 0.0002
7
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
4. CWDT pin
This is a pin to connect an external capacitor in order to generate the watchdog time-out period (tWDU) and the
watchdog double pulse detection time (tWDL). The capacitor is charged and discharged by an internal constant
current circuit.
tWDU is calculated by using the following equation.
tWDU = 50,000,000 × CWDT [F] + 0.0011
Moreover, tWDL is calculated by using the following equation.
tWDU
tWDL
=
32
5. WEN pin
This is a pin to switch Enable / Disable of the watchdog timer.
When the WEN pin logic is active "H", the watchdog timer becomes Enable if the input is "H", and the
charge-discharge operation is performed at the CWDT pin. In the active "H" product, the constant current source
(0.3 μA typ.) is connected to the WEN pin, and it is pulled down internally.
_________
6. WDO pin
This pin combines the reset output and the watchdog output.
________
Be sure to connect a pull-up resistor to the WDO pin in the product without an output pull-up resistor.
7. WDI pin
This is an input pin to receive a signal from the monitored object. By being input an edge at an appropriate timing, the
WDI pin confirms the normal operation of the monitored object.
The constant current source (0.3 μA typ.) is connected to the WDI pin, and it is pulled down internally.
8
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
Rev.2.0_00
S-1410/1411 Series
Absolute Maximum Ratings
Table 7
Symbol
(Ta = +25°C unless otherwise specified)
Item
VDD pin voltage
Absolute Maximum Rating
Unit
V
VDD
VSS − 0.3 to VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VSS + 7.0
WDI pin voltage
VWDI
V
WEN pin voltage
VWEN
V
___
___
V
W / T pin voltage
CPOR pin voltage
CWDT pin voltage
V
/ T
w
VCPOR
VCWDT
V
V
_______
A / B / C / D / E / F type
V
_______
RST pin voltage
VRST
G / H / I / J / K / L type
V
________
A / B / C / D / E / F type
VSS − 0.3 to VDD + 0.3 ≤ VSS + 7.0
VSS − 0.3 to VSS + 7.0
V
________
VWDO
WDO pin voltage
G / H / I / J / K / L type
V
Operation ambient temperature
Storage temperature
Topr
Tstg
−40 to +105
−40 to +150
°C
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
Thermal Resistance Value
Table 8
Item
Symbol
Condition
Min.
Typ.
160
133
181
135
Max.
Unit
°C/W
°C/W
°C/W
°C/W
−
−
−
−
−
−
−
−
Board 1
TMSOP-8
Board 2
Board 1
Board 2
Junction-to-ambient thermal resistance*1
θja
HSNT-8(2030)
*1. Test environment: compliance with JEDEC STANDARD JESD51-2A
Remark Refer to " Thermal Characteristics" for details of power dissipation and test board.
9
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Electrical Characteristics
Table 9 (1 / 2)
(WEN pin logic active "H" product, VDD = 5.0 V, Ta = +25°C unless otherwise specified)
Test
Circuit
Item
Detection voltage*1
Hysteresis width
Symbol
−VDET
VHYS
Condition
Min.
Typ.
Max.
Unit
V
−VDET(S)
× 0.985
−VDET
−VDET(S)
× 1.015
−VDET
−
−VDET(S)
1
−VDET
× 0.05
−
V
1
2
× 0.03
× 0.07
Current consumption
during operation
ISS1
When watchdog timer operates
−
3.8
7.8
μA
tRST
Reset time-out period
C
POR = 2200 pF
WDT = 470 pF
8.7
15
14.5
24.6
20
34
ms
ms
3
3
tWDU
Watchdog time-out period
Watchdog double pulse
detection time
C
tWDL
CWDT = 470 pF
461
769
1077
μs
4
S-1411 Series A / B / C / D /
E / F type only
Reset output voltage "H"
Reset output voltage "L"
VROH
VROL
VDD − 1.0
−
−
−
V
V
5
6
−
−
0.4
_______
VRST = 0 V,
Reset output pull-up current IRUP
S-1411 Series A / B / C / D /
E / F type only
−
−0.85
−0.4
μA
7
V
DD = 1.5 V
0.6
1.1
2.1
2.8
1.1
1.6
2.6
3.3
−
−
−
−
mA
mA
mA
mA
8
8
8
8
VDS = 0.4 V,
S-1411 Series
only
VDD = 1.8 V
VDD = 2.5 V
VDD = 3.0 V
Reset output current
IROUT
V
DS = 6.0 V, VDD = 6.0 V,
Reset output leakage current IRLEAK
−
−
0.096
μA
9
S-1411 Series only
Watchdog output voltage "H" VWOH
Watchdog output voltage "L" VWOL
A / B / C / D / E / F type only
VDD − 1.0
−
−
−
0.4
V
V
10
11
−
−
________
V
Watchdog output
IWUP
WDO = 0 V,
−
−0.85
−0.4
μA
12
pull-up current
A / B / C / D / E / F type only
VDD = 1.5 V
0.6
1.1
2.1
2.8
1.1
1.6
2.6
3.3
−
−
−
−
mA
mA
mA
mA
13
13
13
13
VDD = 1.8 V
VDS = 0.4 V
Watchdog output current
IWOUT
VDD = 2.5 V
VDD = 3.0 V
VDS = 6.0 V, VDD = 6.0 V
WEN pin
Watchdog output leakage
current
IWLEAK
−
−
0.096
μA
14
Input pin voltage 1 "H"
VSH1
VSL1
VSH2
VSL2
VSH3
VSL3
0.7 × VDD
−
−
−
−
−
−
−
V
V
V
V
V
V
15
15
15
15
15
15
Input pin voltage 1 "L"
Input pin voltage 2 "H"
Input pin voltage 2 "L"
Input pin voltage 3 "H"
Input pin voltage 3 "L"
WEN pin
−
0.3 × VDD
−
0.3 × VDD
−
_
W / T pin, S-1410 Series only
0.7 × VDD
_
W / T pin, S-1410 Series only
−
0.7 × VDD
−
WDI pin
WDI pin
0.3 × VDD
10
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Table 9 (2 / 2)
(WEN pin logic active "H" product, VDD = 5.0 V, Ta = +25°C unless otherwise specified)
Test
Circuit
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
A / B / C /
G / H / I
type
−
0.3
1.0
μA
15
WEN pin,
VDD = 6.0 V,
Input pin voltage = 6.0 V
Input pin current 1 "H"
ISH1
D / E / F /
J / K / L
type
−0.1
−
0.1
μA
15
WEN pin, VDD = 6.0 V,
I_n_put pin voltage = 0 V
W / T pin, S-1410 Series only,
Input pin current 1 "L"
Input pin current 2 "H"
Input pin current 2 "L"
Input pin current 3 "H"
Input pin current 3 "L"
ISL1
ISH2
ISL2
ISH3
ISL3
−0.1
−
−
0.3
−
0.1
1.0
0.1
1.0
0.1
μA
μA
μA
μA
μA
15
15
15
15
15
V
DD = 6.0 V, Input pin voltage = 6.0 V
__
W / T pin, S-1410 Series only,
DD = 6.0 V, Input pin voltage = 0 V
−0.1
−
V
WDI pin, VDD = 6.0 V,
Input pin voltage = 6.0 V
WDI pin, VDD = 6.0 V,
Input pin voltage = 0 V
0.3
−
−0.1
Input pulse width "H"*2
Input pulse width "L"*2
thigh1
tlow1
−
−
−
−
−
1.5
1.5
−
−
1.0
−
−
25
25
−
−
−
40
40
−
μs
μs
μs
μs
μs
15
15
3
Watchdog output delay time tWOUT
Reset output delay time
Input setup time
tROUT
tiset
3
3
*1. −VDET: Actual detection voltage, −VDET(S): Set detection voltage
*2. The input pulse width "H" (thigh1) and the input pulse width "L" (tlow1) are defined as shown in Figure 7.
Inputs to the WEN pin and the WDI pin should be greater than or equal to the min. value specified in " Electrical
Characteristics".
t
high1
V
V
SH1
V
V
SH1
WEN
WDI
V
V
SL1
V
V
SL1
t
low1
thigh1
SH3
SH3
SL3
SL3
tlow1
Figure 7
11
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Test Circuits
A
VDD
CPOR
VDD
CPOR
WDO
WDO
CWDT
WDI
CWDT
WDI
+
WEN
W / T
WEN
W / T
V
+
V
VSS
VSS
Figure 8 Test Circuit 1
Figure 9 Test Circuit 2
VDD
VDD
CPOR
CPOR
WDO
CWDT
WDI
WDO
CWDT
WDI
+
+
WEN
W / T
WEN
W / T
V
V
VSS
VSS
Figure 10 Test Circuit 3
Figure 11 Test Circuit 4
VDD
VDD
CPOR
CPOR
WDO
WDO
CWDT
CWDT
WDI
WDI
WEN
RST
WEN
RST
+
+
V
VSS
V
VSS
Figure 12 Test Circuit 5
Figure 13 Test Circuit 6
12
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
VDD
CPOR
VDD
CPOR
CWDT
WDI
WDO
RST
WDO
RST
CWDT
WDI
A
WEN
WEN
A
VSS
VSS
Figure 14 Test Circuit 7
Figure 15 Test Circuit 8
VDD
VDD
CPOR
CPOR
WDO
CWDT
WDI
WDO
RST
CWDT
WDI
+
WEN
W / T
A
WEN
V
VSS
VSS
Figure 16 Test Circuit 9
Figure 17 Test Circuit 10
VDD
VDD
CPOR
CPOR
WDO
WDO
CWDT
WDI
CWDT
WDI
+
WEN
W / T
WEN
W / T
VSS
V
A
VSS
Figure 18 Test Circuit 11
Figure 19 Test Circuit 12
13
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
VDD
CPOR
VDD
CPOR
WDO
A
WDO
A
CWDT
WDI
CWDT
WDI
WEN
W / T
WEN
W / T
VSS
VSS
Figure 20 Test Circuit 13
Figure 21 Test Circuit 14
VDD
CPOR
WDO
CWDT
+
A
WEN, WDI, W / T
VSS
V
Figure 22 Test Circuit 15
14
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Operation
1. From power-on to reset release
The S-1410/1411 Series initiates the initialization if the VDD pin voltage exceeds the release voltage (+VDET).
The _c__h_a__r_g_ e-discharge operation to the CPOR pin is initiated after the passage of the initialization time (tINIT), and
_______
the WDO pin output and the RST pin output change from "L" to "H" after the operation is performed 4 times.
VDD
+VDET
V
CPU
CPOR
WDO
VCPL
Output "L" → "H"
Output "L" → "H"
RST
(S-1411 only)
tINIT
tRST
Remark VCPU: CPOR charge upper limit threshold (1.25 V typ.)
VCPL: CPOR charge lower limit threshold (0.20 V typ.)
Figure 23
tINIT changes according to the power supply rising time. Refer to Figure 24 for the relation between tINIT and the
power supply rising time.
0.1
0.01
0.001
0.0001
0.000001 0.00001 0.0001 0.001
0.01
0.1
Power supply rising time [s]
Figure 24 Power Supply Rising Time Dependency of Initialization Time
Power supply rising time
VDD
CPOR
Initialization time*1
*1. The initialization time is the time period from when the VDD pin voltage reaches VDD / 2 to when CPOR rises.
Figure 25 Initialization Time
15
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
2. From reset release to initiation of charge-discharge operation to CWDT pin
The charge-discharge operation to the CWDT pin differs depending on the status of the WEN pin at the reset release.
2. 1 When WEN pin is "H" at reset release (Active "H")
Since the watchdog timer is Enable, the S-1410/1411 Series initiates the charge-discharge operation to the CWDT
pin.
VDD
CPOR
CWDT
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 26 WEN Pin = "H"
2. 2 When WEN pin is "L" at reset release (Active "H")
Since the watchdog timer is Disable after the CPOR pin performs the charge-discharge operation 4 times, the
S-1410/1411 Series does not initiate the charge-discharge operation to the CWDT pin. If the input to the WEN pin
changes to "H" in this status, the S-1410/1411 Series initiates the charge-discharge operation to the CWDT pin.
VDD
CPOR
CWDT
WEN
(Active "H")
Charge-discharge operation is initiated
at WEN pin = "H"
WDO
RST
(S-1411 only)
Figure 27 WEN Pin = "L" → "H"
16
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
3. Watchdog time-out detection
The watchdog timer detects a time-out after the charge-discharge operation to the CWDT pin is performed 32 times,
________
then the WDO pin output changes from "H" to "L".
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
5
29 30 31 32
1
2
3
"L"
WEN
(Active "H")
WDO
RST
tWDU
tRST
(S-1411 only)
Figure 28
4. Internal counter reset due to edge detection
When the WDI pin detects an edge during the charge-discharge operation to the CWDT pin, the internal counter
which counts the number of times of the charge-discharge operation is reset. The CWDT pin initiates the discharge
operation when an edge is detected, and initiates the charge-discharge operation again after the discharge operation
is completed.
4. 1 Counter reset due to rising edge detection
(S-141xAxx, S-141xDxx, S-141xGxx, S-141xJxx)
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
30 31 32
1
Counter reset due to rising edge detection
Time-out after counter reset
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 29
17
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
4. 2 Counter reset due to falling edge detection
(S-141xBxx, S-141xExx, S-141xHxx, S-141xKxx)
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
30 31 32
1
Counter reset due to falling edge detection
Time-out after counter reset
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 30
4. 3 Counter reset due to both rising and falling edges detection 1
(S-141xCxx, S-141xFxx, S-141xIxx, S-141xLxx)
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
1
2
30 31 32
1
2
Counter reset due to
both rising and falling edges detection
Time-out after counter reset
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 31
18
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
4. 4 Counter reset due to both rising and falling edges detection 2
(S-141xCxx, S-141xFxx, S-141xIxx, S-141xLxx)
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
1
2
30 31 32
1
2
Counter reset due to
both rising and falling edges detection Time-out after counter reset
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 32
5. WEN pin operation during charge-discharge operation to CWDT pin
When the WEN pin changes from "H" to "L" during the charge-discharge operation to the CWDT pin, the CWDT pin
performs the discharge operation. Moreover, the internal counter which counts the number of times of the
charge-discharge operation for the CWDT pin is also reset.
If the WEN pin changes to "H" again in this status, the CWDT pin initiates the charge-discharge operation.
VDD
CPOR
CWDT
1
2
3
4
1
2
3
4
1
2
3
4
1
2
31 32
1
2
Watchdog timer restarts the operation at WEN pin = "H"
Charge-discharge operation is stopped, counter reset
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 33
19
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
6. Watchdog double pulse detection
If an edge is input to the WDI pin again within a specific period of time (the discharge time due to an edge detection +
1 charge-discharge time (tWDL)) after inputting an edge to the WDI pin when the S-1410/1411 Series is the window
________
mode, the WDO pin output changes from "H" to "L".
When the watchdog timer becomes Disable due to a change of the WEN pin ("H" → "L" → "H") after inputting an
________
edge to the WDI pin, the WDO pin continues outputting "H" even if an edge is input to the WDI pin within the specific
period of time mentioned above.
6. 1 Double pulse detection due to rising edge detection
(S-141xAxx, S-141xDxx, S-141xGxx, S-141xJxx)
tWDL
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
5
6
7
8
9 10
"L"
W / T
(S-1410 only)
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 34
6. 2 Double pulse detection due to falling edge detection
(S-141xBxx, S-141xExx, S-141xHxx, S-141xKxx)
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
5
6
7
8
9 10
Counter reset at the 1st edge
Output "H" → "L" at the 2nd edge
"L"
W / T
(S-1410 only)
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 35
20
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
6. 3 Double pulse detection due to both rising and falling edges detection
(S-141xCxx, S-141xFxx, S-141xIxx, S-141xLxx)
The double pulse is detected only when edges are input in order of rising and falling.
6. 3. 1 When edges are input to WDI pin in order of rising and falling
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
5
6
7
8
9 10 11
Counter reset at the1st edge
Output "H" → "L" at the 2nd edge
"L"
W / T
(S-1410 only)
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 36 Double Pulse Detection
6. 3. 2 When edges are input to WDI pin in order of falling and rising
VDD
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
3
4
29 30 31 32
Counter reset at the 1st edge
Only counter reset at the 2nd edge
"L"
W / T
(S-1410 only)
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 37 Double Pulse Non-detection
21
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
7. Operation of low voltage detection
The voltage detection circuit detects a low voltage if the power supply voltage falls below the detection voltage, and
________
_______
then "L" is output from the WDO pin and the RST pin (Only the S-1411 Series). The output is maintained until the
charge-discharge operation of the CPOR pin is performed 4 times.
The S-1410/1411 Series can detect a low voltage even if either the CPOR pin or the WDT pin performs the
___
charge-discharge operation. In this case, the status of the WEN pin or the W / T pin does not have an affect.
VDD
1
2
1
2
3
4
1
2
3
4
CPOR
CWDT
WDI
1
2
3
4
1
2
"H" or "L"
"H" or "L"
"H" or "L"*1
W / T
(S-1410 only)
WEN
(Active "H")
WDO
RST
(S-1411 only)
Figure 38
*1. When the WEN pin is Disable, the charge-discharge operation of CWDT pin is not performed.
____
8. WEN pin, WDI pin and W / T pin
___
Each of the WEN pin, the WDI pin and the W / T pin has a noise filter.
If the power supply voltage is 5.0 V, noise with a minimum pulse width of 200 ns can be eliminated.
22
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Standard Circuits
____
1. S-1410 Series (Product with W / T pin)
VDD
WEN
V
DD
WDI
WDO
W / T
VSS
CPOR CWDT
*1
POR
*2
WDT
C
C
Figure 39
____
2. S-1411 Series (Product without W / T pin)
VDD
WEN
WDI
WDO
RST
VDD
VSS
CPOR CWDT
*1
POR
*2
WDT
C
C
Figure 40
*1. Adjustment capacitor for reset output delay time (CPOR) should be connected directly to the CPOR pin and
the VSS pin.
*2. Adjustment capacitor for watchdog output delay time (CWDT) should be connected directly to the CWDT pin
and the VSS pin.
A capacitor of 100 pF to 1 μF can be used for CPOR and CWDT
.
Caution
The above connection diagram and constant will not guarantee successful operation.
Perform thorough evaluation using the actual application to set the constants.
23
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Precautions
• It will take time for the discharge operation to be performed if the capacitance of CPOR is extremely large at the low
voltage detection, so the discharge operation may not be completed by the time the power supply voltage exceeds
the detection voltage. In that case, since the charge-discharge operation of the CPOR pin is performed after the
discharge operation is completed, the delay time of the same time length as the discharge operation occurs in reset
time-out period (tRST).
• Select a capacitor which satisfies the following equation for CPOR and CWDT. If this condition is not satisfied, the
delay time of the same time length as the discharge operation occurs in tRST since the discharge operation of an
external capacitor connected to the CWDT pin is not completed by the time the CWDT pin initiates the next
charge-discharge operation.
CWDT / CPOR ≤ 600
• When the power supply voltage falls to 0.9 V or lower, set a time interval of 20 μs or longer by the time the power
supply is raised again. If the appropriate time length is not secured, the time-out period after raising the power
supply voltage may get delayed.
• When the time that the power supply voltage falls below the detection voltage is short, the S-1410/1411 Series may
not detect a voltage. In that case, the time-out period after raising the power supply voltage may get delayed.
___
• Since input pins (the WEN pin, the WDI pin and the W / T pin) in the S-1410/1411 Series are CMOS configurations,
make sure that an intermediate potential is not input when the S-1410/1411 Series operates.
________
_______
• Since the WDO pin and the RST pin are affected by external resistance and external capacitance, use the
S-1410/1411 Series after performing thorough evaluation with the actual application.
•
•
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
SII Semiconductor Corporation claims no responsibility for any disputes arising out of or in connection with any
infringement by products including this IC of patents owned by a third party.
24
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Characteristics (Typical Data)
1. Current consumption during operation (ISS1) vs. Input voltage (VDD
)
WDT = OFF, −VDET(S) = 4.0 V, Ta = +25°C
WDT = ON,
−
VDET(S) = 4.0 V, Ta =
+
25°C, WDI input
5.0
5.0
Ta = 40C
4.0
3.0
2.0
1.0
0.0
4.5
4.0
3.5
Ta = +105C
Ta =
5.0
+
25C
3.0
4.0
4.5
5.5
6.0
6.5
0
1
2
3
4
5
6
V
DD [V]
V
DD [V]
2. Current consumption during operation (ISS1) vs. Temperature (Ta)
3. Detection voltage (
−
VDET
)
,
Release voltage (
+
VDET) vs. Temperature (Ta)
WDT = ON,
−
VDET(S) = 4.0 V, VDD = 5.0 V, WDI input
−VDET(S) = 4.0 V
5.0
4.5
+VDET
VDET
4.0
3.0
2.0
1.0
0.0
4.0
3.5
3.0
40 25
0
25
50
75
105
40 25
0
25
50
75
105
Ta [C]
Ta [C]
4. Reset time-out period (tRST) vs. Temperature (Ta)
5. Watchdog time-out period (tWDU) vs. Temperature (Ta)
VDD = 5.0 V, CPOR = 2200 pF
VDD = 5.0 V, CWDT = 470 pF
40
40
30
20
10
0
30
20
10
0
40 25
0
25
50
75
105
40 25
0
25
50
75
105
Ta [C]
Ta [C]
6. Reset output delay time (tROUT) vs. Temperature (Ta)
7. Watchdog output delay time (tWOUT) vs. Temperature (Ta)
VDD = −VDET(S) + 1.0 V → −VDET(S) − 1.0 V,
VDD = 5.0 V, CWDT = 470 pF
C
POR = 2200 pF
40
40
30
20
10
0
30
20
10
0
40 25
0
25
Ta [C]
50
75
105
40 25
0
25
Ta [C]
50
75
105
25
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
8. Reset time-out period (tRST) vs. CPOR
9. Watchdog time-out period (tWDU) vs. CWDT
VDD = 5.0 V, Ta = +25°C
VDD = 5.0 V, Ta = +25°C
10
100
1
0.1
10
1
0.01
0.1
0.001
0.0001
0.01
0.001
0.0001
0.001
0.01
0.1
1
0.0001
0.001
0.01
0.1
1
C
POR [F]
CWDT [F]
10. Nch driver output current (IWOUT) vs. Input voltage (VDD
)
VDS = 0.4 V, −VDET(S) = 4.0 V
6.0
Ta =
40C
+25C
4.0
2.0
0.0
Ta =
Ta =
+
105C
0
1
2
3
4
5
V
DD [V]
26
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
Thermal Characteristics
1. TMSOP-8
T
j
= 125C max.
1.0
Board 2
0.8 0.75 W
0.6
Board 1
0.63 W
0.4
0.2
0
0
50
100
150
Ambient temperature (Ta) [C]
Figure 41 Power Dissipation of Package (When Mounted on Board)
Table 10
1. 1 Board 1
76.2 mm
Item
Specification
Thermal resistance value
(θja)
160°C/W
Size
114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer
1
2
Land pattern and wiring for testing: t0.070 mm
2
−
−
Copper foil layer
3
4
74.2 mm × 74.2 mm × t0.070 mm
Thermal via
−
Figure 42
1. 2 Board 2
76.2 mm
Table 11
Item
Specification
Thermal resistance value
(θja)
133°C/W
Size
114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer
1
4
Land pattern and wiring for testing: t0.070 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.070 mm
−
2
Copper foil layer
3
4
Thermal via
Figure 43
27
LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-1410/1411 Series
Rev.2.0_00
2. HSNT-8(2030)
Tj = +125°C max.
1.0
0.8
0.6
0.4
0.2
0
Board 2
0.74 W
Board 1
0.55 W
0
50
100
150
Ambient temperature (Ta) [C]
Figure 44 Power Dissipation of Package (When Mounted on Board)
Table 12
2. 1 Board 1
76.2 mm
Item
Specification
Thermal resistance value
(θja)
181°C/W
Size
114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer
1
2
Land pattern and wiring for testing: t0.070 mm
2
−
−
Copper foil layer
3
4
74.2 mm × 74.2 mm × t0.070 mm
Thermal via
−
Figure 45
2. 2 Board 2
76.2 mm
Table 13
Item
Specification
Thermal resistance value
(θja)
135°C/W
Size
114.3 mm × 76.2 mm × t1.6 mm
Material
FR-4
Number of copper foil layer
1
4
Land pattern and wiring for testing: t0.070 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.035 mm
74.2 mm × 74.2 mm × t0.070 mm
−
2
Copper foil layer
3
4
Thermal via
Figure 46
28
2.90±0.2
8
5
1
4
0.13±0.1
0.2±0.1
0.65±0.1
No. FM008-A-P-SD-1.2
TMSOP8-A-PKG Dimensions
FM008-A-P-SD-1.2
TITLE
No.
ANGLE
UNIT
mm
SII Semiconductor Corporation
2.00±0.05
4.00±0.1
1.00±0.1
4.00±0.1
+0.1
-0
1.5
1.05±0.05
0.30±0.05
3.25±0.05
1
8
4
5
Feed direction
No. FM008-A-C-SD-2.0
TMSOP8-A-Carrier Tape
FM008-A-C-SD-2.0
TITLE
No.
ANGLE
UNIT
mm
SII Semiconductor Corporation
16.5max.
13.0±0.3
Enlarged drawing in the central part
13±0.2
(60°)
(60°)
No. FM008-A-R-SD-1.0
TMSOP8-A-Reel
FM008-A-R-SD-1.0
TITLE
No.
ANGLE
UNIT
QTY.
4,000
mm
SII Semiconductor Corporation
2.0±0.1
5
8
(1.70)
+0.05
-0.02
0.08
1
4
0.5
0.23±0.1
No. PP008-A-P-SD-2.0
TITLE
DFN-8/HSNT-8-A-PKG Dimensions
PP008-A-P-SD-2.0
No.
The heat sink of back side has different electric
potential depending on the product.
ANGLE
UNIT
Confirm specifications of each product.
Do not use it as the function of electrode.
mm
SII Semiconductor Corporation
+0.1
-0
2.0±0.05
4.0±0.1
0.25±0.05
ø1.5
+0.1
-0
0.60±0.05
ø1.0
4.0±0.1
2.3±0.05
4 3 2 1
5 6 78
Feed direction
No. PP008-A-C-SD-1.0
TITLE
DFN-8/HSNT-8-A-Carrier Tape
PP008-A-C-SD-1.0
No.
ANGLE
UNIT
mm
SII Semiconductor Corporation
+1.0
- 0.0
9.0
11.4±1.0
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. PP008-A-R-SD-1.0
TITLE
DFN-8/HSNT-8-A-Reel
PP008-A-R-SD-1.0
No.
QTY.
5,000
ANGLE
UNIT
mm
SII Semiconductor Corporation
1.6
0.50
0.30
No. PP008-A-L-SD-1.0
DFN-8/HSNT-8-A
-Land Recommendation
TITLE
No.
PP008-A-L-SD-1.0
ANGLE
UNIT
mm
SII Semiconductor Corporation
Disclaimers (Handling Precautions)
1. All the information described herein (product data, specifications, figures, tables, programs, algorithms and
application circuit examples, etc.) is current as of publishing date of this document and is subject to change without
notice.
2. The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
SII Semiconductor Corporation is not responsible for damages caused by the reasons other than the products or
infringement of third-party intellectual property rights and any other rights due to the use of the information described
herein.
3. SII Semiconductor Corporation is not responsible for damages caused by the incorrect information described herein.
4. Take care to use the products described herein within their specified ranges. Pay special attention to the absolute
maximum ratings, operation voltage range and electrical characteristics, etc.
SII Semiconductor Corporation is not responsible for damages caused by failures and/or accidents, etc. that occur
due to the use of products outside their specified ranges.
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The user of these products should therefore take responsibility to give thorough consideration to safety design
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