○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays
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Datashee
TSZ02201-0R7R0G300050-1-2
© 2012 ROHM Co., Ltd. All rights reserved.
18.Dec.2012 Rev.005
TSZ22111・14・001
www.rohm.com
Voltage Detector IC Series
Low Voltage Free Delay Time Setting
CMOS Voltage Detector IC Series
BU42xx series BU43xx series
●General Description
ROHM’s BU42xx and BU43xx series are CMOS Voltage
Detector ICs with adjustable output delay. It is a
high-accuracy, low current consumption Voltage Detector
IC series with a built-in delay circuit. The lineup was
established with two output types (Nch open drain and
CMOS output) and detection voltages range from 0.9V to
4.8V in increments of 0.1V, so that the series may be
selected according to application.
●Features
Delay Time Controlled by external Capacitor
Two output types (Nch open drain and CMOS output)
Ultra-low current consumption
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 (Typ.)
0.1V steps
High accuracy detection voltage: ±1.0%
Ultra-low current consumption: 0.55µA (Typ.)
Operating temperature range: -40°C to +125°C
●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
●Applications
Circuits using microcontrollers or logic circuits that require
a reset.
●Typical Application Circuit
●Connection Diagram & Pin Descriptions
SSOP5 SOP4 VSOF5
PIN
No.
Symbol Function
PIN
No.
Symbol Function
PIN
No.
Symbol Function
1 VOUT Reset output 1 GND GND 1 VOUT Reset output
2 VDD Power supply voltage 2 VDD Power supply voltage 2 SUB Substrate*
3 GND GND
3 CT
Capacitor connection
terminal for output
delay time
3 CT
Capacitor connection
terminal for output
delay time
4 N.C. Unconnected terminal 4 VOUT Reset output 4 VDD Power supply voltage
5 CT
Capacitor connection
terminal for output
delay time
5 GND GND
VDD1
BU42xx
VDD2
GND
CL
(Capacitor for
noise filtering)
CT
R
L
CIN
R
ST
Micro
controller
Open Drain Output type
BU42xx series
VDD1
BU43xx
CIN
GND
CT
CL
(Capacitor for
noise filtering)
RST
Micro
controller
CMOS Output type
BU43xx series
TOP VIEW TOP VIEW TOP VIEW
*Connect the substrate to V
DD
GND VDD
CTVOUT
1 2
3 4
Marking
Lot. No
VOUT VDD GND
N.C.
C
T
Lot. No
Marking
VDD
VOUT SUB CT
GND
4
3 2
1
5
Marking
Lot. No
