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What is BU4940G-TR?

This electronic component, produced by the manufacturer "ROHM Semiconductor", performs the same function as "Low Voltage Standard CMOS Voltage Detector IC".


BU4940G-TR Datasheet PDF - ROHM Semiconductor

Part Number BU4940G-TR
Description Low Voltage Standard CMOS Voltage Detector IC
Manufacturers ROHM Semiconductor　
Logo ROHM Semiconductor Logo　


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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:
High accuracy detection voltage:
Ultra-low current consumption:
Operating temperature range:
0.9V to 4.8V
0.1V steps
±1.0%
0.55µA (Typ.)
-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
All electronic devices that use micro controllers and logic
circuits
●Typical Application Circuit
VDD1
VDD2
VDD1
RL
BU48xx
RST
Micro
controller
CIN
CL
(Capacitor for
noise filtering)
（Open Drain Output type）
BU48xx series
CIN
GND
GND
BU49xx
RST
Micro
controller
CL
(Capacitor for
noise filtering)
（CMOS Output type）
BU49xx series
○Product structure：Silicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
1/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012

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BU4940G-TR equivalent
BU48xx series BU49xx series
Unless Otherwise Specified Ta=-25 to 125℃
Parameter
Symbol
Condition
VDET=0.9-1.3V
VDET=1.4-2.1V
Circuit Current when ON
IDD1 VDD=VDET-0.2V
VDET=2.2-2.7V
VDET=2.8-3.3V
VDET=3.4-4.2V
VDET=4.3-4.8V
VDET=0.9-1.3V
VDET=1.4-2.1V
Circuit Current when OFF
IDD2
VDD=VDET+2.0V
VDET=2.2-2.7V
VDET=2.8-3.3V
VDET=3.4-4.2V
VDET=4.3-4.8V
Operating Voltage Range
VOPL
VOL≤0.4V, Ta=25 to 125℃, RL=470kΩ
VOL≤0.4V, Ta=-40 to 25℃, RL=470kΩ
VDD=0.85V, ISINK = 20 µA
‘Low’ Output Voltage (Nch) VOL VDD=1.5V, ISINK = 1 mA, VDET=1.7-4.8V
VDD=2.4V, ISINK = 4 mA, VDET=2.7-4.8V
VDD=4.8V,ISOURCE=1.7mA,
‘High’ Output Voltage (Pch)
(only BU49xx)
VOH
VDET=0.9V to 3.9V
VDD=6.0V,ISOURCE=2.0mA,
VDET=4.0V to 4.8V
Output Leak Current when
OFF
(only BU48xx)
VDD=VDS=7V
Ta=-40℃ to 85℃
Ileak VDD=VDS=7V
Ta=85℃ to 125℃
* This product is not designed for protection against radioactive rays.
VDET(T) : Standard Detection Voltage (0.9V to 4.8V, 0.1V step)
RL: Pull-up resistor to be connected between VOUT and power supply.
Min.
-
-
-
-
-
-
-
-
-
-
-
-
0.70
0.90
-
-
-
VDD-0.5
VDD-0.5
-
-
Limit
Typ.
0.15
0.20
0.25
0.30
0.35
0.40
0.30
0.35
0.40
0.45
0.50
0.55
-
-
-
-
-
-
-
0
0
Max.
0.88
1.05
1.23
1.40
1.58
1.75
1.40
1.58
1.75
1.93
2.10
2.28
-
-
0.05
0.5
0.5
-
-
0.1
1
Unit
µA
µA
V
V
V
V
µA
●Block Diagrams
VDD
Vref
GND
Fig.1 BU48xx Series
VOUT
VDD
Vref
GND
Fig.2 BU49xx Series
VOUT
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012


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Featured Datasheets

Part NumberDescriptionMFRS
BU4940G-TRThe function is Low Voltage Standard CMOS Voltage Detector IC. ROHM SemiconductorROHM Semiconductor

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