Datasheet
Voltage Detector IC Series
Low Voltage Standard
CMOS Voltage Detector ICs
BU48xx series
BU49xx series
●General Description
ROHM standard CMOS reset IC series is a high-accuracy,
low current consumption reset IC series. The lineup was
established with two output types (Nch open drain and
CMOS output) and detection voltage range from 0.9V to
4.8V in increments of 0.1V, so that the series may be
selected according to the application at hand.
●Features
Ultra-low current consumption
High accuracy detection, Ultra-low voltage detection
Two output types (Nch open drain and CMOS output)
Wide operating temperature range
Very small and low height package
Package SSOP5 and SOP4 is similar to SOT-23-5 and
SC-82 respectively (JEDEC)
●Key Specifications
Detection voltage:
0.9V to 4.8V
0.1V steps
±1.0%
0.55µA (Typ.)
-40°C to +125°C
High accuracy detection voltage:
Ultra-low current consumption:
Operating temperature range:
●Package
SSOP5
2.90mm x 2.80mm x 1.25mm
SOP4
2.00mm x 2.10mm x 0.95mm
VSOF5
1.60mm x 1.60mm x 0.60mm
SOT89-3F
4.50mm x 4.15mm x 1.50mm
●Applications
All electronic devices that use micro controllers and logic
circuits
●Typical Application Circuit
VDD1
VDD2
VDD1
RL
RST
BU48xx
CIN
CIN
CL
Micro
controller
CL
(Capacitor for
noise filtering)
(Capacitor for
noise filtering)
GND
（Open Drain Output type）
BU48xx series
○Product structure：Silicon monolithic integrated circuit
.
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
RST
BU49xx
Micro
controller
GND
（CMOS Output type）
BU49xx series
○This product is not designed for protection against radioactive rays
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TSZ02201-0R7R0G300060-1-2
18.Dec.2012 Rev.007
