S1F77600 Series
Rev.1.0 SEIKO EPSON CORPORATION
PF1307-03
Power Supply IC
DESCRIPTION
S1F77600 series comprises high-accuracy, low-consumption low-voltage detectors which work at a low
voltage. Output is guaranteed until supply voltage reaches 0V. They are ICs used to prevent liquid
leakage of a dry cell by detecting the voltage drop of power supply of two cells connected in series. The
internal circ uits of the ICs c ons ist of ref er ence voltage c irc uits , compar ators , r es istanc es f or detec ting voltage,
hysteresis circuits, output-securing circuits (forced output Hi-Z) and output transistors.
Detection voltage is of non-adjustment type, fixed inside the IC at high accuracy.
Output form is selectable from P-ch open drain and N-ch open drain.
The packages are of SOT89-3pin type.
These ICs are best suited to the dry-cell liquid leakage prevention/protection circuit of a portable product
which uses power supply of two dry cells connected in series.
LINEUP
Product name Output form Detection voltage Hysteresis width
S1F77600Y0A0 N-ch open drain 1.2V 0.8V
S1F77601Y0A0 P-ch open drain 1.2V 0.8V
S1F77602Y0A0 N-ch open drain 2.4V 0.3V
S1F77603Y0A0 P-ch open drain 2.4V 0.3V
FEATURES
Current consumption
S1F77600/77601 : Max. 5.0µA (VDD = 3.0V, P-ch open drain)
S1F77602/77603 : Max. 5.5µA (VDD = 3.0V, N-ch open drain)
Operational voltage : 0.8V to 5.5V
Forced output Hi-Z : 0.0V to 1.0V
Detection voltage
S1F77600/77601 : 1.2V to 1.6V (0.05V step: mask option)
S1F77602/77603 : 1.7V to 2.5V (0.1V step: mask option)
Accuracy of detection voltage
S1F77600/77601 : ±3.5% (Ta=25°C)
S1F77602/77603 : ±2.0% (Ta=25°C)
Detection temperature characteristics : -320ppm/°C
Hysteresis width
S1F77600/77601 : 0.20V to 1.00V (0.05V step: mask option)
S1F77602/77603 : 0.12V to 0.30V (0.02V step: mask option)
Release voltage : Detection voltage + hysteresis width
Accuracy of release voltage
S1F77600/77601 : ±2.5% (Ta=25°C)
S1F77602/77603 : ±2.0% (Ta=25°C)
Detection temperature characteristics : -260ppm/°C
Operational temperature : -30°C to +85°C
Output form : P-ch open drain, N-ch open drain (mask option)
Shipping forms : SOT89-3pin, SON-6pin (TBD)
S1F77600 Series
2 EPSON Rev.1.0
TIMING CHART
When P-ch open drain output
When N-ch open drain output
Release Vol tage ( + VDET)
Detec tion Voltage ( - VDET)
Lower Limit of Oper at ion al
Voltage
VSS
S upply Voltage
(VDD)
Output P-ch
O pen Dr ain
(OUT)
HYS Wi dth
Hi-Z
VSS
Release Voltage ( + VDET)
Detec tion Voltage ( - VDET)
Lower Limit of Oper at ion al
Voltage
Release Voltage ( + VDET)
Detec tion Voltage ( -VDET)
Lower Limit of Oper at io nal
Voltage
VSS
S upply Voltage
(VDD)
Output N-ch
O pen Dr ain
(OUT)
HYS Wi dth
Hi-Z
VSS
Release Voltage ( + VDET)
Detec tion Voltage ( -VDET)
Lower Limit of Oper at io nal
Voltage
S1F77600 Series
Rev.1.0 EPSON 3
PIN DESCRIPTION
Pin name I/O PIN No. Function
OUT O 1 Detected-voltage output pin (selectable from P-ch/N-ch open drain)
VSS I 2 Input voltage pin (-)
VDD I 3 Input voltage pin (+)
BLOCK DIAGRAM
VREF
VDD
VSS
OUT
+
-
Output Securing C ircui t
Forced Output Hi-Z if Supply
Voltage is ≤1.0V
(Note) P-ch open drain output
N-ch open drain output
(Mask option allows you to select either output form.)
VREF
VDD
VSS
OUT
+
-
Output Securing C ircui t
Forced Output Hi-Z if Supply
Voltage is ≤1.0V
(Note) P-ch open drain output
N-ch open drain output
(Mask option allows you to select either output form.)
S1F77600 Series
Rev.1.0
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©Seiko E pson Corporation 2003, All ri ghts reserved.
ELECTRONIC DEVICES MARKETING DIVISION
SEIKO EPSON CORPORATION
IC Marketing & Engineering Group
ED International Marketing Department
421-8 Hino, Hino-s hi , Tokyo 191-8501, J APAN
Phone: 042-587-5814 FAX: 042-587-5117
■ EPSON Elect roni c devices Websi te
First i ssue January, 2003
Printed June, 2003 in Japan H
