Datasheet
Voltage Detector IC Series
Low Voltage Standard
CMOS Voltage Detector ICs
BU48xx series
BU49xx series
●Key
Specifications
Detection voltage:
0.9V to 4.8V
0.1V steps
±1.0%
0.55µA (Typ.)
-40°C to +125°C
●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)
●Typical
Application Circuit
V
DD1
R
L
BU48xx
C
IN
C
L
(Capacitor for
noise filtering)
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
●Applications
All electronic devices that use micro controllers and logic
circuits
V
DD2
V
DD1
R
ST
Micro
controller
BU49xx
C
IN
R
ST
Micro
controller
C
L
(Capacitor for
noise filtering)
GND
GND
（Open
Drain Output type）
BU48xx series
（CMOS
Output type）
BU49xx series
○Product
structure：Silicon monolithic integrated circuit
.
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© 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
BU48xx series
BU49xx series
●Connection
Diagram & Pin Descriptions
SSOP5
TOP VIEW
SOP4
TOP VIEW
N.C.
N.C.
GND
4
N.C.
3
Marking
V
OUT
PIN
No.
1
2
3
4
5
Symbol
V
OUT
V
DD
GND
N.C.
N.C.
V
DD
GND
Lot. No
Marking
1
V
OUT
PIN
No.
1
2
3
4
Symbol
V
OUT
V
DD
N.C.
GND
2
V
DD
Lot. No
Function
Reset output
Power supply voltage
GND
Unconnected terminal
Unconnected terminal
Function
Reset output
Power supply voltage
Unconnected terminal
GND
VSOF5
TOP VIEW
GND V
DD
4
5
Marking
1 2 3
V
OUT
SUB N.C
.
PIN
No.
1
2
3
4
5
Symbol
V
OUT
SUB
N.C.
V
DD
GND
Lot. No
Function
Reset output
Substrate*
Unconnected terminal
Power supply voltage
GND
*Connect the substrate to V
DD
●Ordering
Information
B
Part
Number
U
x
x
x
x
x
Package
G : SSOP5
F : SOP4
FVE : VSOF5
-
T
R
Output Type
48 : Open Drain
49 : CMOS
Reset Voltage Value
09 : 0.9V
0.1V step
48 : 4.8V
Packaging and
forming specification
TR : Embossed tape
and reel
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
2/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012
BU48xx series
●Lineup
BU49xx series
Output Type
Detection Voltage Marking
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
4.1V
4.0V
3.9V
3.8V
3.7V
3.6V
3.5V
3.4V
3.3V
3.2V
3.1V
3.0V
2.9V
2.8V
2.7V
2.6V
2.5V
2.4V
2.3V
2.2V
2.1V
2.0V
1.9V
1.8V
1.7V
1.6V
1.5V
1.4V
1.3V
1.2V
1.1V
1.0V
0.9V
JR
JQ
JP
JN
JM
JL
JK
JJ
JH
JG
JF
JE
JD
JC
JB
JA
HZ
HY
HX
HW
HV
HU
HT
HS
HR
HQ
HP
HN
HM
HL
HK
HJ
HH
HG
HF
HE
HD
HC
HB
HA
Open Drain
Part Number
BU4848
BU4847
BU4846
BU4845
BU4844
BU4843
BU4842
BU4841
BU4840
BU4839
BU4838
BU4837
BU4836
BU4835
BU4834
BU4833
BU4832
BU4831
BU4830
BU4829
BU4828
BU4827
BU4826
BU4825
BU4824
BU4823
BU4822
BU4821
BU4820
BU4819
BU4818
BU4817
BU4816
BU4815
BU4814
BU4813
BU4812
BU4811
BU4810
BU4809
Marking
LH
LG
LF
LE
LD
LC
LB
LA
KZ
KY
KX
KW
KV
KU
KT
KS
KR
KQ
KP
KN
KM
KL
KK
KJ
KH
KG
KF
KE
KD
KC
KB
KA
JZ
JY
JX
JW
JV
JU
JT
JS
CMOS
Part Number
BU4948
BU4947
BU4946
BU4945
BU4944
BU4943
BU4942
BU4941
BU4940
BU4939
BU4938
BU4937
BU4936
BU4935
BU4934
BU4933
BU4932
BU4931
BU4930
BU4929
BU4928
BU4927
BU4926
BU4925
BU4924
BU4923
BU4922
BU4921
BU4920
BU4919
BU4918
BU4917
BU4916
BU4915
BU4914
BU4913
BU4912
BU4911
BU4910
BU4909
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
3/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012
BU48xx series
BU49xx series
●Absolute
Maximum Ratings
Parameter
Symbol
Limits
Unit
Power Supply Voltage
V
DD
-0.3 to +7
V
Nch Open Drain Output
GND-0.3 to +7
Output Voltage
V
OUT
V
CMOS Output
GND-0.3 to V
DD
+0.3
Output Current
Io
70
mA
*1*4
SSOP5
540
Power
*2*4
SOP4
Pd
400
mW
Dissipation
*3*4
VSOF5
210
Operation Temperature Range
T
opt
-40 to +125
°C
Ambient Storage Temperature
Tstg
-55 to +125
℃
*1 When used at temperatures higher than Ta=25℃, the power is reduced by 5.4mW per 1℃ above 25℃.
*2 When used at temperatures higher than Ta=25℃, the power is reduced by 4.0mW per 1℃ above 25℃.
*3 When used at temperatures higher than Ta=25℃, the power is reduced by 2.1mW per 1℃ above 25℃.
*4 When a ROHM standard circuit board (70mm×70mm×1.6mm, glass epoxy board)is mounted.
●Electrical
Characteristics
Parameter
Symbol
Condition
V
DD
=HL , Ta=25℃,R
L
=470kΩ
Ta=+25°C
Ta=-40°C to 85°C
Ta=85°C to 125°C
Ta=+25°C
Ta=-40°C to 85°C
Ta=85°C to 125°C
Ta=+25°C
Ta=-40°C to 85°C
Ta=85°C to 125°C
Ta=+25°C
Ta=-40°C to 85°C
Ta=85°C to 125°C
Ta=+25°C
Ta=-40°C to 85°C
Ta=85°C to 125°C
*1
VDET=1.8V
VDET=2.5V
Detection Voltage
V
DET
VDET=3.0V
VDET=3.3V
VDET=4.2V
Detection Voltage
Temperature Coefficient
Hysteresis Voltage
V
DET
/∆T Ta=-40℃ to 125℃
∆V
DET
V
DD
=LHL
Ta=-40℃ to 125℃
R
L
=470kΩ
Min.
V
DET
(T)
×0.99
1.782
1.741
1.718
2.475
2.418
2.386
2.970
2.901
2.864
3.267
3.191
3.150
4.158
4.061
4.009
-
Limits
Typ.
V
DET
(T)
1.8
-
-
2.5
-
-
3.0
-
-
3.3
-
-
4.2
-
-
±30
V
DET
×0.05
V
DET
×0.05
Max.
V
DET
(T)
×1.01
1.818
1.860
1.883
2.525
2.584
2.615
3.030
3.100
3.139
3.333
3.410
3.452
4.242
4.341
4.394
-
V
DET
×0.08
V
DET
×0.07
Unit
V
ppm/℃
V
DET
≤1.0V
V
DET
≥1.1V
V
DET
×0.03
V
DET
×0.03
V
*1 Guaranteed by design.(Outgoing inspection is not done on all products.)
V
DET
(T) : Standard Detection Voltage (0.9V to 4.8V, 0.1V step)
R
L
: Pull-up resistor to be connected between V
OUT
and power supply.
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
4/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012
BU48xx series
BU49xx series
Unless Otherwise Specified Ta=-25 to 125℃
Parameter
Symbol
Condition
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
-
V
-
0.1
µA
1
Unit
V
DET
=0.9-1.3V
V
DET
=1.4-2.1V
V
DET
=2.2-2.7V
Circuit Current when ON
I
DD
1
V
DD
=V
DET
-0.2V
V
DET
=2.8-3.3V
V
DET
=3.4-4.2V
V
DET
=4.3-4.8V
V
DET
=0.9-1.3V
V
DET
=1.4-2.1V
V
DET
=2.2-2.7V
Circuit Current when OFF
I
DD
2
V
DD
=V
DET
+2.0V
V
DET
=2.8-3.3V
V
DET
=3.4-4.2V
V
DET
=4.3-4.8V
V
OL
≤0.4V, Ta=25 to 125℃, R
L
=470kΩ
Operating Voltage Range
V
OPL
V
OL
≤0.4V, Ta=-40 to 25℃, R
L
=470kΩ
V
DD
=
0.85V
,
I
SINK
=
20 µ
A
‘Low’ Output Voltage (Nch)
V
DD
=
1.5V
,
I
SINK
=
1 mA
,
V
DET
=1.7-4.8V
V
OL
V
DD
=
2.4V
,
I
SINK
=
4 mA
,
V
DET
=2.7-4.8V
V
DD
=4.8V,I
SOURCE
=1.7mA,
V
DET
=0.9V to 3.9V
‘High’ Output Voltage (Pch)
V
OH
(only BU49xx)
V
DD
=6.0V,I
SOURCE
=2.0mA,
V
DET
=4.0V to 4.8V
V
DD
=V
DS
=7V
Output Leak Current when
Ta=-40℃ to 85℃
OFF
I
leak
V
DD
=V
DS
=7V
(only BU48xx)
Ta=85℃ to 125℃
* This product is not designed for protection against radioactive rays.
V
DET
(T) : Standard Detection Voltage (0.9V to 4.8V, 0.1V step)
R
L
: Pull-up resistor to be connected between V
OUT
and power supply.
µA
µA
V
V
V
●Block
Diagrams
V
DD
V
DD
V
OUT
V
OUT
Vref
Vref
GND
GND
Fig.1
BU48xx Series
Fig.2
BU49xx Series
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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