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PDF BU4916F-TR Data sheet ( Hoja de datos )

Número de pieza BU4916F-TR
Descripción Low Voltage Standard CMOS Voltage Detector IC
Fabricantes ROHM Semiconductor 
Logotipo ROHM Semiconductor Logotipo



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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 structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays
1/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012

1 page




BU4916F-TR pdf
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
VOL0.4V, Ta=25 to 125, RL=470k
VOL0.4V, Ta=-40 to 25, RL=470k
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=-40to 85
Ileak VDD=VDS=7V
Ta=85to 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.
TSZ2211115001
5/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012

5 Page





BU4916F-TR arduino
BU48xx series BU49xx series
3) Examples of the power supply with resistor dividers
In applications where the power supply input terminal (VDD) of an IC is connected through resistor
dividers, it is possible that a through current will momentarily flow into the circuit when the output logic
switches, resulting in malfunctions (such as output oscillatory state).
(Through-current is a current that momentarily flows from the power supply (VDD) to ground (GND) when
the output level switches from “High” to “Low” or vice versa.)
V1
IDD
R2
I1
VDD
Through
Current
R1
CIN
BU48xx
BU49xx
GND
VOUT
CL
Fig.18
0 VDET
A voltage drop of [the through-current (I1)] × [input resistor (R2)] is caused by the through current, and
the input voltage to descends, when the output switches from “Low” to “High”. When the input voltage
decreases and falls below the detection voltage, the output voltage switches from “High” to “Low”. At this
time, the through-current stops flowing through output “Low”, and the voltage drop is eliminated. As a
result, the output switches from “Low” to “High”, which again causes the through current to flow and the
voltage drop. This process is repeated, resulting in oscillation.
Consider the use of BD48xx when the power supply input it with resistor dividers.
VDD - IDD Peak Current Ta=25°C
BU49xx,BU43xx
10 BU48xx,BU42xx
BD52xx
BD53xx
1
0.1
2.5
2.0
1.5
1.0
Temp - IDD(BU42xx)
0.01 0.5
VDD
VDD3V
VDD6V
VDD7V
VDD4V
0.001
3 4 5 6 7 8 9 10
VDD[V]
0.0
-50 -30 -10 10 30 50 70 90 110 130
Temp
Fig.19 Current Consumption vs. Power Supply Voltage
* This data is for reference only.
The figures will vary with the application, so please confirm actual operating conditions before use.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
11/15
TSZ02201-0R7R0G300060-1-2
02.Nov.2015 Rev.012

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