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Número de pieza | BD45E261 | |
Descripción | Counter Timer Built-in CMOS Voltage Detector IC | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de BD45E261 (archivo pdf) en la parte inferior de esta página. Total 17 Páginas | ||
No Preview Available ! Datasheet
Voltage Detector IC Series for Automotive
Counter Timer Built-in
CMOS Voltage Detector IC
BD45Exxxx-M series BD46Exxxx-M series
●General Description
ROHM’s BD45Exxxx-M and BD46Exxxx-M series are
highly accurate, low current consumption Voltage
Detector IC series. Because the counter timer delay
circuit is built into those series, an external capacitor for
the delay time setting is unnecessary. The lineup was
established with two output types (Nch open drain and
CMOS output) and detection voltages range from 2.3V
to 4.8V in increments of 0.1V, so that the series may be
selected according to application.
●Features
Counter Timer Built-in
No delay time setting capacitor required
Ultra-low current consumption
Two output types (Nch open drain and CMOS output)
Package SSOP5 is similar to SOT-23-5 (JEDEC)
AEC-Q100 Qualified
●Key Specifications
Detection voltage:
2.3V to 4.8V (Typ.)
High accuracy detection voltage:
Ultra-low current consumption:
Operating temperature range:
Three internal, fixed delay time:
0.1V steps
±1.0%
0.85µA (Typ.)
-40°C to +105°C
50ms
100ms
200ms
●Package
SSOP5
2.90mm x 2.80mm x 1.25mm
●Applications
Circuits using microcontrollers or logic circuits that
require a reset for automotive applications (car
navigation, car audio, meter panel, exterior lamp etc.)
●Typical Application Circuit
VDD1
VDD2
BD45Exxxx-M
RL
Micro
RST controller
CL
(Noise-filtering
Capacitor)
(Open Drain Output Type)
BD45Exxxx-M series
●Connection Diagram
SSOP5
VDD
VOUT
GND
TOP VIEW
Marking
Lot. No
ER SUB GND
VDD1
BD46Exxxx-M
RST
Micro
controller
GND
CL
(Noise-filtering
Capacitor)
(CMOS Output Type)
BD46Exxxx-M series
●Pin Descriptions
PIN No. Symbol
Function
1 ER Manual Reset
2
SUB
Substrate *
3
GND
GND
4
VOUT
Reset Output
5 VDD Power Supply Voltage
*Connect the substrate to GND.
○Product structure:Silicon monolithic integrated circuit
.www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed for protection against radioactive rays
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27.Aug.2013 Rev.004
1 page BD45Exxxx-M series BD46Exxxx-M series
●Electrical characteristics (Unless Otherwise Specified Ta=-40 to 105°C) – continued
Parameter
Operating Voltage Range
‘High’ Output Voltage (Pch)
‘Low’Output Voltage (Nch)
Leak Current when OFF
ER Pin ‘H’ Voltage
ER Pin ‘L’ Voltage
ER Pin Input Current
Symbol
VOPL
VOH
VOL
Ileak
VEH
VEL
IEL
Condition
VOL≤0.4V, RL=470kΩ, Ta=25 to 105°C
Min.
0.95
VOL≤0.4V, RL=470kΩ, Ta=-40 to 25°C
1.20
VDD=4.8V, ISOURCE= 1.0 mA, VDET(2.3V to 4.2V) VDD-0.5
VDD=6.0V, ISOURCE= 1.2 mA, VDET(4.3V to 4.8V) VDD-0.5
VDD=1.2V, ISINK = 0.45 mA
-
VDD=2.4V, ISINK = 1.3 mA, VDET(2.7V to 4.8V)
-
VDD=VDS=10V
*1 -
*1 2.0
*1 -
-
Limit
Typ.
-
-
-
-
-
-
-
-
-
1
VDET(T):Standard Detection Voltage (2.3V to 4.8V, 0.1V step)
RL :Pull-up resistor to be connected between VOUT and power supply.
CL :Capacitor to be connected between VOUT and GND.
*1 Guarantee is Ta=25°C.
Attention: Please connect ‘ER’ to the GND when not in use.
Max.
-
-
-
-
0.3
0.3
0.1
-
0.8
10
Unit
V
V
V
µA
V
V
µA
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/14
TSZ02201-0R7R0G300110-1-2
27.Aug.2013 Rev.004
5 Page BD45Exxxx-M series BD46Exxxx-M series
●Circuit Applications
1) Examples of a common power supply detection reset circuit.
VDD1
VDD2
BD45Exxxx-M
RL
RST
Micro
controller
CL
(Noise-filtering
Capacitor)
Fig.18 Open Drain Output Type
VDD1
GND
BD46Exxxx-M
Micro
RST controller
GND
CL
(Noise-filtering
Capacitor)
Fig.19 CMOS Output Type
Application examples of BD45Exxxx-M series (Open
Drain output type) and BD46Exxxx-M series (CMOS
output type) are shown below.
CASE1: Power supply of microcontroller (VDD2) differs
from the power supply of the reset detection (VDD1).
Use an open drain output Type (BD45xx series) device
with a load resistance RL as shown Fig.18.
CASE2: Power supply of the microcontroller (VDD1) is
same as the power supply of the reset detection (VDD1).
Use a CMOS output type (BD46Exxxx-M) device or an
open drain output type (BD45Exxxx-M) with a pull up
resistor between the output and VDD1.
When a capacitance CL for noise filtering is connected to
the VOUT pin (the reset signal input terminal of the
microcontroller), please take into account the waveform
of the rise and fall of the output voltage (VOUT).
2) The following is an example of a circuit application in which an OR connection between two types of detection voltage
resets the microcontroller.
VDD1
VDD2
VDD3
BD45Exxxx-M
BD45Exxxx-M
RL
RST
Micro
controller
Fig. 20
GND
To reset the microcontroller when many independent power supplies are used in the system, OR connect an open drain
output type (BD45Exxxx-M series) to the microcontroller’s input with pull-up resistor to the supply voltage of the
microcontroller (VDD3) as shown in Fig. 20. By pulling-up to VDD3, output “High” voltage of micro-controller power supply is
possible.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/14
TSZ02201-0R7R0G300110-1-2
27.Aug.2013 Rev.004
11 Page |
Páginas | Total 17 Páginas | |
PDF Descargar | [ Datasheet BD45E261.PDF ] |
Número de pieza | Descripción | Fabricantes |
BD45E261 | Counter Timer Built-in CMOS Voltage Detector IC | ROHM Semiconductor |
BD45E261-M | Counter Timer Built-in CMOS Voltage Detector IC | ROHM Semiconductor |
BD45E262 | Counter Timer Built-in CMOS Voltage Detector IC | ROHM Semiconductor |
BD45E262-M | Counter Timer Built-in CMOS Voltage Detector IC | ROHM Semiconductor |
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