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Rev.2.0
* S-807 Series will be summarized into S-808 Series.
HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
The S-807 Series is an adjustment-free high-precision voltage detector
made using the CMOS process. The output voltage is fixed internally,
with an accuracy of ±2.4%. Two output types are available, Nch open-
drain and CMOS output (active “H” and “L”), both of which have various
product lineups. This series features much lower current consumption
and higher detection voltage accuracy than the S-805 Series. Super-
miniature package is added for the S-807 Series, the S-807XXSX
Series. This small SOT-23-5 style package allows the designer to
shrink the size of his finished product. Electrical specs for the S-
807XXSX Series are the same as the standard S-807 Series. Output
forms of the S-807XXSX Series are Nch open-drain and CMOS active
“L”.
n Features
Ultra-low current consumption
1.0 µA typ. (VDD=4.5 V)
High-precision detection voltage ±2.4%
Wide operating voltage range
1.0 to 15 V
Good hysteresis characteristics
5% typ.
Wide operating temperature range -30°C to+80°C
3 output forms : Nch open-drain, CMOS output active H ,
active L
TO-92, SOT-89-3 and SOT-23-5 package
n Applications
Battery checker
Battery backup for memories
Power failure detector
Reset for microcomputer
Store signal detector for non-
volatile RAM
n Pin Assignment
(1) TO-92
1 OUT
2 VDD
3 VSS
(2) SOT-89-3
Top view
1 OUT
2 VDD
3 VSS
1 2 3 Bottom view
12 3
Figure 1
(3) SOT-23-5
Top view
54
123
1 OUT
2 VDD
3 VSS
4 NC
5 NC
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HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
n Block Diagram
(1) Nch open-drain output
VDD 2
-
+
(2) CMOS active low output
(3) CMOS active high output
VSS 3
VDD 2
-
+
VSS 3
VDD 2
-
+
VSS 3
Figure 2
1 OUT
*
1 OUT
*
1 OUT
* Parasitic diode
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HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
n Selection Guide
Table 1
Detection
voltage
range (V)
Hysteresis
width
typ. (V)
CMOS output (Low)
CMOS output (High)
Nch open-drain
TO-92
SOT-89-3*
SOT-23-5*
TO-92
SOT-89-3*
TO-92
SOT-89-3*
SOT-23-5*
1.5 V±2.4% 0.075
S-80715AL-AC-X
S-80715AN-DC-X
1.6 V±2.4% 0.08
S-80716AL-AD-X
S-80716AN S-80716AN-DD-X
1.7 V±2.4% 0.085 S-80717AL S-80717AL-AE-X
S-80717AN S-80717AN-DE-X S-80717SN-DE-X
1.8 V±2.4% 0.09 S-80718AL S-80718AL-AF-X S-80718SL-AF-X
S-80718AH-BF-T1 S-80718AN S-80718AN-DF-X
1.9 V±2.4% 0.095 S-80719AL S-80719AL-AG-X S-80719SL-AG-X
S-80719AN S-80719AN-DG-X S-80719SN-DG-X
2.0 V±2.4%
0.1
S-80720AL-AH-X S-80720SL-AH-X
S-80720AN S-80720AN-DH-X S-80720SN-DH-X
2.1 V±2.4% 0.105 S-80721AL S-80721AL-AJ-X S-80721SL-AJ-X
S-80721AN S-80721AN-DJ-X S-80721SN-DJ-X
2.2 V±2.4% 0.11 S-80722AL S-80722AL-AK-X
S-80722AN S-80722AN-DK-X
2.3 V±2.4% 0.115 S-80723AL S-80723AL-AL-X S-80723SL-AL-X
S-80723AN S-80723AN-DL-X S-80723SN-DL-X
2.4 V±2.4% 0.12 S-80724AL S-80724AL-AM-X
S-80724AN S-80724AN-DM-X S-80724SN-DM-X
2.5 V±2.4% 0.125 S-80725AL S-80725AL-AN-X S-80725SL-AN-X
S-80725AH-BN-X S-80725AN S-80725AN-DN-X S-80725SN-DN-X
2.6 V±2.4% 0.13
S-80726AL-AP-X
S-80726AN S-80726AN-DP-X
2.7 V±2.4% 0.135 S-80727AL S-80727AL-AQ-X S-80727SL-AQ-X
S-80727AN S-80727AN-DQ-X S-80727SN-DQ-X
2.8 V±2.4% 0.14
S-80728AL-AR-X S-80728SL-AR-X
S-80728AN S-80728AN-DR-X S-80728SN-DR-X
2.9 V±2.4% 0.145 S-80729AL S-80729AL-AS-X
S-80729AN-DS-X
3.0 V±2.4% 0.15 S-80730AL S-80730AL-AT-X S-80730SL-AT-X
S-80730AN S-80730AN-DT-X S-80730SN-DT-X
3.1 V±2.4% 0.155 S-80731AL S-80731AL-AV-X
S-80731AH S-80731AH-BV-X S-80731AN S-80731AN-DV-X
3.2 V±2.4% 0.16 S-80732AL S-80732AL-AW-X S-80732SL-AW-X
S-80732AN S-80732AN-DW-X
3.3 V±2.4% 0.165 S-80733AL S-80733AL-AX-X S-80733SL-AX-X S-80733AH
S-80733AN S-80733AN-DX-X S-80733SN-DX-X
3.4 V±2.4% 0.17 S-80734AL S-80734AL-AY-X
S-80734AN S-80734AN-DY-X
3.5 V±2.4% 0.175 S-80735AL S-80735AL-AZ-X S-80735SL-AZ-X
S-80735AN S-80735AN-DZ-X S-80735SN-DZ-X
3.6V±2.4% 0.18
S-80736AL-A0-X
S-80736AN S-80736AN-D0-X
3.7V±2.4% 0.185 S-80737AL S-80737AL-A1-X
S-80737AN S-80737AN-D1-X
3.8 V±2.4% 0.19 S-80738AL S-80738AL-A2-X
S-80738AN S-80738AN-D2-X
3.9 V±2.4% 0.195 S-80739AL S-80739AL-A3-X
S-80739AN S-80739AN-D3-X
4.0 V±2.4%
0.2 S-80740AL S-80740AL-A4-X S-80740SL-A4-X S-80740AH S-80740AH-B4-X S-80740AN S-80740AN-D4-X S-80740SN-D4-X
4.1 V±2.4% 0.205 S-80741AL S-80741AL-A5-X
S-80741AN S-80741AN-D5-X
4.2 V±2.4% 0.21 S-80742AL S-80742AL-A6-X S-80742SL-A6-X
S-80742AN S-80742AN-D6-X S-80742SN-D6-X
4.3 V±2.4% 0.215 S-80743AL S-80743AL-A7-X
S-80743AN S-80743AN-D7-X
4.4 V±2.4% 0.22 S-80744AL S-80744AL-A8-X
S-80744AN S-80744AN-D8-X S-80744SN-D8-X
4.295
to
4.605
Release S-80744HL S-80744HL-U8-X
voltage
4.70 max.
4.5 V±2.4% 0.225 S-80745AL S-80745AL-A9-X S-80745SL-A9-X
S-80745AH-B9-X S-80745AN S-80745AN-D9-X S-80745SN-D9-X
4.6 V±2.4% 0.23 S-80746AL S-80746AL-EA-X
S-80746AN-JA-X
4.7 V±2.4% 0.235 S-80747AL S-80747AL-EB-X
S-80747AN-JB-X
4.8 V±2.4% 0.24
S-80748AL-EC-X
S-80748AN S-80748AN-JC-X
4.9 V±2.4% 0.245
S-80749AL-ED-X
S-80749AN-JD-X
5.0 V±2.4% 0.25
S-80750AL-EE-X S-80750SL-EE-X
S-80750AN S-80750AN-JE-X S-80750SN-JE-X
5.1 V±2.4% 0.255 S-80751AL
S-80751SL-EF-X
S-80751AN S-80751AN-JF-X S-80751SN-JF-X
5.2 V±2.4% 0.26
S-80752AL-EG-T1 S-80752SL-EG-T1
S-80752AN-JG-T1
5.3 V±2.4% 0.265
S-80753AN
5.5 V±2.4% 0.275
S-80755AL-EK-X
6.1 V±2.4% 0.305
S-80761SL-ER-X
6.3 V±2.4% 0.315
S-80763AN-JT-X
7.7V±2.4% 0.385
S-80777SN-J8-X
* The last digit of the model name changes depending upon the packing form when it is an SOT package product (S-807XXSX
Series is packed on tape).
S : Stick
T : Tape (T1 and T2 types are available depending on the direction of detectors on the tape.)
** Please ask our sales person if you need another detection voltage product.
Seiko Instruments Inc.
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HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
n Output Configurations
1. S-807 Series model numbering conventions
S-807 Series
Nch open-drain
(Lreset type)
Nis the last letter of
the model number.
Ex. S-80732AN
CMOS output
(Lreset type)
Lis the last letter of
the model number.
Ex. S-80718AL
CMOS output
(Hreset type)
His the last letter of
the model number.
Ex. S-80740AH
2. Output configurations and their implementations
Implementation
With different power supplies
With active low reset CPUs
With active high reset CPUs
As power resets employing CR circuits
With voltage divider resistors to vary (-VDET)
Nch CMOS (L) CMOS (H)
¡× ×
¡¡
×
× ×¡
¡× ×
¡× ×
Example with two power supplies
VDD1
VDD2
Examples with one power supply
VDD
VDD
V/D
Nch
CPU
OUT
VSS
V/D
CPU
CMOS OUT
VSS
V/D
CPU
Nch
OUT
VSS
Figure 3
or
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HIGH-PRECISION VOLTAGE DETECTOR
S-807 Series
n Advantage over the S-805 Series
The S-807 Series, in comparison with conventional reset ICs such as the S-805 Series, offers greater detection voltage precision
(twice that of conventional units) and lower current consumption (half that of conventional units). These characteristics result in
the following advantages over conventional units.
1. Advantages of greater detection voltage precision
1.1 Detecting lithium battery service life
The discharge characteristics of lithium batteries are
shown in Figure 4. When using the S-805 Series,
the service life can be detected over t1. When
using the S-807 Series, it can be detected over t2.
This improvement in detection precision of the S-
807 Series means that batteries can be used over
more of their service life.
V S-807
S-805
t2
t1
Figure 4
t
1.2 Detecting a power voltage at two points
It is usual for the CPU to detect the power voltage
at two points, one to caution and the other to reset.
The service life of battery may also be detected at
two points, one to caution and the other to request
immediate replacement.
Two voltage values to be detected (No. 1 and No.
2) do not cross and the voltage can be detected
correctly.
V
No. 2
No. 1
Must be close
Figure 5
t
1.3 Voltage drop when modifying detection voltage
If no voltage to be detected is suitable, the voltage
can be set higher in Nch open-drain output
products by using a resistor divider. (Example :
when detecting 6V or 9V.)
When 8V is detected using the S-8054HN (a
4V±5% device), the -Vdet tolerance becomes
2×4.00×±0.05=0.8V (R1=R2). In constrast, the S-
80740AN (a 4V±2.4% device) can hold down the
tolerance to 2×4.00×±0.024=0.384V (R1=R2).
R1
S-807
XXAN/SN
R2
Nch open-drain
output product
Figure 6
Seiko Instruments Inc.
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