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A4805 Schematic ( PDF Datasheet ) - AiT Semiconductor

Teilenummer A4805
Beschreibung HIGH VOLTAGE HIGH PRECISION VOLTAGE DETECTOR
Hersteller AiT Semiconductor
Logo AiT Semiconductor Logo 




Gesamt 12 Seiten
A4805 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A4805
SUPERVISOR (RESET IC)
HIGH VOLTAGE HIGH PRECISION VOLTAGE DETECTOR
DESCRIPTION
FEATURES
The A4805 is a series of high voltage
high-precision voltage detectors developed
using standard CMOS process. The detection
voltage is fixed internally with an accuracy of
±2.4% Nch open-drain.
Low current consumption and miniature package
lineup can meet demand from the portable
device applications.
A4805 is available in SOT-89-3 & TO-92
packages.
Low current consumption 3μA typ.(VIN=8V)
High-precision detection voltage ±2.4%
Operating voltage range -0.3 V to 22 V
Detection voltage 2.4 V to 7.0 V (0.1V step)
Output form Nch open-drain output (Active Low)
Available in SOT-89-3 & TO-92 packages
APPLICATION
Battery checkers
Power failure detectors
Power monitor for portable equipments such as
pagers, calculators, electronic notebooks and
remote controllers.
Constant voltage power monitor for cameras,
video equipments and communication devices.
Power monitor for microcomputers and reset for
CPUs.
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
TO-92
Z
A4805ZY-XXN
A4805ZVY-XXN
SOT89-3
K3
A4805K3R-XXN
A4805K3VR-XXN
XX: Detect Voltage
30=3.0V, 39=3.9V
N: N-channel open drain
Note
Y: A: Ammo Pack
B: Bulk Pack
R: Tape & Reel
V: Halogen free Package
AiT provides all RoHS products
Suffix Vmeans Halogen free Package
Nch Open-drain Output
REV1.3
-APR 2009 RELEASED, JUN 2013 UPDATED -
-1-






A4805 Datasheet, Funktion
AiT Semiconductor Inc.
www.ait-ic.com
A4805
SUPERVISOR (RESET IC)
HIGH VOLTAGE HIGH PRECISION VOLTAGE DETECTOR
DETAILED INFORMATION
Timing Chart
Operation
1-1.When the power supply voltage (VDD) is higher than the release voltage (VDF), the Nch transistor is OFF
and the Pch transistor is ON to provide VDD (high) at the output.
1-2. When the power supply voltage (VDD) is lower than the release voltage (VDF), the Nch transistor is ON and
the Pch transistor is OFF to provide VSS (low) at the output.
1-3. When the VDD falls below the minimum operating voltage, the output becomes undefined, or goes to the
VDD when the output is pulled up to the VDD.
1-4. The VSS level appears when the VDD rises above the minimum operating voltage. The VSS level still
appears even when the VDD surpasses − VDF, as long as it does not exceed the release voltage + VDF.
1-5. When the VDD rises above + VDF the Nch transistor becomes OFF and the Pch transistor becomes ON to
provide VDD level at the output.
REV1.3
-APR 2009 RELEASED, JUN 2013 UPDATED -
-6-

6 Page









A4805 pdf, datenblatt
AiT Semiconductor Inc.
www.ait-ic.com
IMPORTANT NOTICE
A4805
SUPERVISOR (RESET IC)
HIGH VOLTAGE HIGH PRECISION VOLTAGE DETECTOR
AiT Semiconductor Inc. (AiT) reserves the right to make changes to any its product, specifications, to
discontinue any integrated circuit product or service without notice, and advises its customers to obtain the
latest version of relevant information to verify, before placing orders, that the information being relied on is
current.
AiT Semiconductor Inc.'s integrated circuit products are not designed, intended, authorized, or warranted to
be suitable for use in life support applications, devices or systems or other critical applications. Use of AiT
products in such applications is understood to be fully at the risk of the customer. In order to minimize risks
associated with the customer's applications, the customer should provide adequate design and operating
safeguards.
AiT Semiconductor Inc. assumes to no liability to customer product design or application support. AiT
warrants the performance of its products of the specifications applicable at the time of sale.
REV1.3
-APR 2009 RELEASED, JUN 2013 UPDATED -
- 12 -

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