S-19400 Datasheet, PDF (10/36 Pages) Seiko Instruments Inc – Watchdog operation voltage range

FOR AUTOMOTIVE 125°C OPERATION LOW CURRENT CONSUMPTION WATCHDOG TIMER WITH RESET FUNCTION
S-19400/19401 Series
Rev.2.1_00
 Electrical Characteristics
Table 9 (1 / 2)
(WEN pin logic active "H" product, V_DD = 5.0 V, Ta = −40°C to +125°C unless otherwise specified)
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Test
Circuit
Detection voltage^*1
−V_DET
−
−V_DET(S)
× 0.98
−V_DET(S)
−V_DET(S)
× 1.02
V
1
Hysteresis width
V_HYS
−
−V_DET
× 0.03
−V_DET
× 0.05
−V_DET
× 0.07
V
1
Current consumption
during operation
I_SS1
When watchdog timer operates
−
3.8
9.0
μA
2
Reset time-out period
t_RST
Watchdog time-out period tWDU
Watchdog double pulse
detection time
t_WDL
C_POR = 2200 pF
C_WDT = 470 pF
C_WDT = 470 pF
8.7
14.5
20
ms
3
15
24.6
34
ms
3
461
769
1077
μs
4
Reset output voltage "H"
V_ROH
S-19401 Series A / B / C / D /
E / F type only
V_DD − 1.0
−
−
V
5
Reset output voltage "L"
V_ROL
Reset output pull-up current I_RUP
−
V = 0 V, ^_______
RST
S-19401 Series A / B / C / D /
E / F type only
−
−
0.4
V
6
−
−0.85 −0.4 μA
7
Reset output current
I_ROUT
Reset output leakage current I_RLEAK
V_DS = 0.4 V,
S-19401 Series
only
V_DD = 1.5 V
V_DD = 1.8 V
V_DD = 2.5 V
V_DD = 3.0 V
V_DS = 6.0 V, V_DD = 6.0 V,
S-19401 Series only
0.48
0.8
1.0
1.4
−
1.1
−
mA
8
1.6
−
mA
8
2.6
−
mA
8
3.3
−
mA
8
−
0.096 μA
9
Watchdog output voltage "H" V_WOH
A / B / C / D / E / F type only
V_DD − 1.0
−
−
V
10
Watchdog output voltage "L"
Watchdog output
pull-up current
V_WOL
I_WUP
−
V _{= 0 V,} ^________
WDO
A / B / C / D / E / F type only
−
−
0.4
V
11
−
−0.85 −0.4 μA 12
V_DD = 1.5 V
0.48
1.1
−
mA 13
Watchdog output current
I_WOUT
V_DS = 0.4 V
V_DD = 1.8 V
0.8
V_DD = 2.5 V
1.0
1.6
2.6
−
mA 13
−
mA 13
V_DD = 3.0 V
1.4
Watchdog output leakage
current
I_WLEAK
V_DS = 6.0 V, V_DD = 6.0 V
−
3.3
−
mA 13
−
0.096 μA 14
Input pin voltage 1 "H"
V_SH1
WEN pin
0.7 × V_DD
−
−
V
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"
V_SL1
V_SH2
V_SL2
V_SH3
V_SL3
WEN pin
___
−
− 0.3 × V_DD V
15
W / T pin, S-19400 Series only
___
0.7 × V_DD
−
−
V
15
W / T pin, S-19400 Series only
−
− 0.3 × V_DD V
15
WDI pin
0.7 × V_DD
−
−
V
15
WDI pin
−
− 0.3 × V_DD V
15
10