ROHM BD4932FVE Technical data

Voltage Detector IC Series
Standard CMOS Voltage Detector IC
BD48xxx series BD49xxx series
General Description
ROHM’s BD48xxx and BD49xxx series are highly accurate, low current consumption reset IC series. The line up includes BD48xxx devices with N channel open drain output and BD49xxx devices with CMOS output. The devices are available for specific detection voltages ranging from 2.3V to 6.0V in increments of 0.1V.
Features
High accuracy detection Ultra-low current consumption Two output types (Nch open drain and CMOS output) Wide Operating temperature range Very small and low height package Package SSOP5 is similar to SOT-23-5 (JEDEC) Package SSOP3 is similar to SOT-23-3 (JEDEC)
Ty pical A pplication Circuit
Datasheet
Key Specifications
Detection voltage: 2.3V to 6.0V (Typ.),
0.1V steps
High accuracy detection voltage: ±1.0% Ultra-low current consumption: 0.9A (Typ.)
Operating temperature range: -40°C to +105°C
Package
SSOP5: 2.90mm x 2.80mm x 1.15mm SSOP3: 2.90mm x 2.80mm x 1.15mm VSOF5: 1.60 mm x 1.60mm x 0.60mm
Applications
Circuits using microcontrollers or logic circuits that require a reset.
DD1
V
Product structure:Silicon monolithic integrated circuitThis product is not designed protection against radioactive rays.
BD48xxx
(Open Drain Output type
BD48xxx series
L
R
R
L
C
Capacitor for
(
noise filtering
ST
Micro controller
DD2
V
DD1
V
GND
GND
BD49xxx
(CMOS Output type
BD49xxx series
R
L
C
Capacitor for
(
noise filtering
ST
Micro controller
www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Connection Diagram SSOP5 VSOF5
N.C. N.C.
Datasheet
V
DD
GND
4
5
Marking
V
OUT VDD GND
TOP VIEW
Lot. No
Marking
2
3
1
OUT SUB N.C
V
TOP VIEW
Lot. No
Pin Descriptions
SSOP5 VSOF5
PIN No. Symbol Function PIN No. Symbol Function
1 V
2 V
3 GND GND
4 N.C. Unconnected Terminal 4 GND GND
5 N.C.
*Connect the substrate to GND.
OUT Reset Output 1 VOUT Reset Output
DD Power Supply Voltage 2 SUB Substrate*
3 N.C.
Unconnected Terminal 5 V
DD Power Supply Voltage
Unconnected Terminal
SSOP3(1pin GND) SSOP3(3pin GND)
VDD
3
GND
3
Marking
1
GND
TOP VIEW
V
2
OUT
Lot. No
Marking
1
VOUT
TOP VIEW
Lot. No
2
VDD
Pin Descriptions
SSOP3-1 SSOP3-2
PIN No. Symbol Function PIN No. Symbol Function
1 GND GND 1 V
2 V
3
OUT Reset Output 2 VDD Power Supply Voltage
DD Power Supply Voltage 3 GND GND
V
OUT Reset Output
z Ordering Information
BDx x -T Rxxx x
Part Output Type Package1 Reset Voltage Value Package2 Packageing and Number 48 : Open Drain 23 : 2.3V forming specification
note)
49 : CMOS 0.1V step Embossed tape and reel
60 : 6.0V TR :The pin number 1is
the upper right :SSOP5 :VSOF5 TL :The pin number 1is
Package1 Package2 Package name the upper left E G SSOP5 :SSOP3-1 K G SSOP3(1pin GND) :SSOP3-2 L G SSOP3(3pin GND) Blank FVE VSOF5 Blank G SSOP5
Please be new and, in hope of SSOP5, choose the package 1 by "E" and package 2" G."
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TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
SSOP3
0.45±0.1
5
5
0.95
Datasheet
SSOP5
°
2.9±0.2
5
4
+0.2
0.1
2.8±0.2
1.6
12
3
4
0.13
+
6
°
°
4
0.2Min.
+0.05
0.03
<Tape and Reel information>
Embossed carrier tapeTape
Quantity
Direction of feed
3000pcs TR
The direction is the 1pin of product is at the upper right when you hold
()
reel on the left hand and you pull out the tape on the right hand
1.25Max.
VSOF5
1.1±0.05
0.05±0.05
0.95
+0.05
0.42
0.04
0.1
(Unit : mm)
Reel
5
1.6± 0.05
1.0± 0.05
4
0.2MAX
1.2± 0.05
1.6± 0.05
(MAX 1.28 include BURR)
1
2
3
0.13± 0.05
0.6MAX
0.5
0.22± 0.05
(Unit : mm)
2.92±0.1
3
1.6±0.1
2.8±0.15
1
2
4°±4°
L
MAX
1.1±0.05
1.2
1.9±0.1
0.4±0.1
1pin
Direction of feed
Order quantity needs to be multiple of the minimum quantity.
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TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Datasheet
Lineup
Marking
Detection
Voltage EW 6.0V BD4860 EB 4.1V BD4841 GW 6.0V BD4960 GB 4.1V BD4941 EV 5.9V BD4859 EA 4.0V BD4840 GV 5.9V BD4959 GA 4.0V BD4940 EU 5.8V BD4858 DV 3.9V BD4839 GU 5.8V BD4958 FV 3.9V BD4939
ET 5.7V BD4857 DU 3.8V BD4838 GT 5.7V BD4957 FU 3.8V BD4938 ES 5.6V BD4856 DT 3.7V BD4837 GS 5.6V BD4956 FT 3.7V BD4937 ER 5.5V BD4855 DS 3.6V BD4836 GR 5.5V BD4955 FS 3.6V BD4936 EQ 5.4V BD4854 DR 3.5V BD4835 GQ 5.4V BD4954 FR 3.5V BD4935 EP 5.3V BD4853 DQ 3.4V BD4834 GP 5.3V BD4953 FQ 3.4V BD4934 EN 5.2V BD4852 DP 3.3V BD4833 GN 5.2V BD4952 FP 3.3V BD4933 EM 5.1V BD4851 DN 3.2V BD4832 GM 5.1V BD4951 FN 3.2V BD4932
EL 5.0V BD4850 DM 3.1V BD4831 GL 5.0V BD4950 FM 3.1V BD4931 EK 4.9V BD4849 DL 3.0V BD4830 GK 4.9V BD4949 FL 3.0V BD4930
EJ 4.8V BD4848 DK 2.9V BD4829 GJ 4.8V BD4948 FK 2.9V BD4929 EH 4.7V BD4847 DJ 2.8V BD4828 GH 4.7V BD4947 FJ 2.8V BD4928 EG 4.6V BD4846 DH 2.7V BD4827 GG 4.6V BD4946 FH 2.7V BD4927
EF 4.5V BD4845 DG 2.6V BD4826 GF 4.5V BD4945 FG 2.6V BD4926 EE 4.4V BD4844 DF 2.5V BD4825 GE 4.4V BD4944 FF 2.5V BD4925 ED 4.3V BD4843 DE 2.4V BD4824 GD 4.3V BD4943 FE 2.4V BD4924 EC 4.2V BD4842 DD 2.3V BD4823 GC 4.2V BD4942 FD 2.3V BD4923
Part
Number
Marking
Detection
Voltage
Part
Number
Marking
Detection
Voltage
Part
Number
Marking
Detection
Voltage
Number
Ea Dy
Dr Dp Dn
Dk Dh Dg
Df De Dd Dc Db Da Cy
Cr Cp Cn
Detection
Voltage
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
Number
BD49E41
BD49E40
BD49E39
BD49E38
BD49E37
BD49E36
BD49E35
BD49E34
BD49E33
BD49E32
BD49E31
BD49E30
BD49E29
BD49E28
BD49E27
BD49E26
BD49E25
BD49E24
BD49E23
Marking
Cm
Ck Ch Cg
Cf Ce Cd Cc Cb Ca By
Br Bp Bn
Bm
Bk Bh Bg
Bf
Detection
Voltage
6.0V
5.9V
5.8V
5.7V
5.6V
5.5V
5.4V
5.3V
5.2V
5.1V
5.0V
4.9V
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V BD48E42
Part
Number
BD48E60
BD48E59
BD48E58
BD48E57
BD48E56
BD48E55
BD48E54
BD48E53
BD48E52
BD48E51
BD48E50
BD48E49
BD48E48
BD48E47
BD48E46
BD48E45
BD48E44
BD48E43
Marking
Be Bd Bc Bb Ba Ay
Ar Ap An
Am
Ak Ah Ag
Af Ae Ad Ac Ab Aa
Detection
Voltage
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
Part
Number
BD48E41
BD48E40
BD48E39
BD48E38
BD48E37
BD48E36
BD48E35
BD48E34
BD48E33
BD48E32
BD48E31
BD48E30
BD48E29
BD48E28
BD48E27
BD48E26
BD48E25
BD48E24
BD48E23
Marking
Ff Fe Fd Fc Fb Fa Ey Er Ep En
Em
Ek Eh Eg Ef Ee Ed Ec Eb
Detection
Voltage
6.0V
5.9V
5.8V
5.7V
5.6V
5.5V
5.4V
5.3V
5.2V
5.1V
5.0V
4.9V
4.8V
4.7V
4.6V
4.5V
4.4V
4.3V
4.2V
Part
Number
BD49E60
BD49E59
BD49E58
BD49E57
BD49E56
BD49E55
BD49E54
BD49E53
BD49E52
BD49E51
BD49E50
BD49E49
BD49E48
BD49E47
BD49E46
BD49E45
BD49E44
BD49E43
BD49E42
Marking
Dm
Part
Part
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TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Marking
Cm
Ck Ch Cg
Cf Ce Cd Cc Cb Ca By
Br Bp Bn
Bm
Bk Bh Bg
Bf
Detection
Voltage
6.0V BD48K60
5.9V BD48K59
5.8V BD48K58
5.7V BD48K57
5.6V BD48K56
5.5V BD48K55
5.4V BD48K54
5.3V BD48K53
5.2V BD48K52
5.1V BD48K51
5.0V BD48K50
4.9V BD48K49
4.8V BD48K48
4.7V BD48K47
4.6V BD48K46
4.5V BD48K45
4.4V BD48K44
4.3V BD48K43
4.2V BD48K42
Part Number Marking
Be Bd Bc Bb Ba Ay Ar Ap An
Am
Ak Ah Ag Af Ae Ad Ac Ab Aa
Detection Voltage
4.1V BD48K41
4.0V BD48K40
3.9V BD48K39
3.8V BD48K38
3.7V BD48K37
3.6V BD48K36
3.5V BD48K35
3.4V BD48K34
3.3V BD48K33
3.2V BD48K32
3.1V BD48K31
3.0V BD48K30
2.9V BD48K29
2.8V BD48K28
2.7V BD48K27
2.6V BD48K26
2.5V BD48K25
2.4V BD48K24
2.3V BD48K23
Marking
Kb Ka Hy
Hr Hp Hn
Hm
Hk Hh Hg
Hf He Hd Hc Hb Ha Gy
Gr Gp
Detection
Voltage
6.0V BD48L60
5.9V BD48L59
5.8V BD48L58
5.7V BD48L57
5.6V BD48L56
5.5V BD48L55
5.4V BD48L54
5.3V BD48L53
5.2V BD48L52
5.1V BD48L51
5.0V BD48L50
4.9V BD48L49
4.8V BD48L48
4.7V BD48L47
4.6V BD48L46
4.5V BD48L45
4.4V BD48L44
4.3V BD48L43
4.2V BD48L42
Part Number Marking
Gn
Gm
Gk Gh Gg
Gf Ge Gd Gc Gb Ga
Fy
Fr
Fp
Fn
Fm
Fk
Fh
Fg
Detection Voltage
4.1V BD48L41
4.0V BD48L40
3.9V BD48L39
3.8V BD48L38
3.7V BD48L37
3.6V BD48L36
3.5V BD48L35
3.4V BD48L34
3.3V BD48L33
3.2V BD48L32
3.1V BD48L31
3.0V BD48L30
2.9V BD48L29
2.8V BD48L28
2.7V BD48L27
2.6V BD48L26
2.5V BD48L25
2.4V BD48L24
2.3V BD48L23
Part Number Marking
Ff Fe Fd Fc Fb Fa Ey
Er Ep En
Em
Ek Eh Eg
Ef Ee Ed Ec Eb
Part Number Marking
Np Nn
Nm
Nk Nh Ng
Nf Ne Nd Nc Nb Na
My
Mr
Mp Mn
Mm
Mk Mh
Detection
Voltage
6.0V BD49K60
5.9V BD49K59
5.8V BD49K58
5.7V BD49K57
5.6V BD49K56
5.5V BD49K55
5.4V BD49K54
5.3V BD49K53
5.2V BD49K52
5.1V BD49K51
5.0V BD49K50
4.9V BD49K49
4.8V BD49K48
4.7V BD49K47
4.6V BD49K46
4.5V BD49K45
4.4V BD49K44
4.3V BD49K43
4.2V BD49K42
Detection
Voltage
6.0V BD49L60
5.9V BD49L59
5.8V BD49L58
5.7V BD49L57
5.6V BD49L56
5.5V BD49L55
5.4V BD49L54
5.3V BD49L53
5.2V BD49L52
5.1V BD49L51
5.0V BD49L50
4.9V BD49L49
4.8V BD49L48
4.7V BD49L47
4.6V BD49L46
4.5V BD49L45
4.4V BD49L44
4.3V BD49L43
4.2V BD49L42
Part
Number
Part
Number
Marking
Ea Dy Dr Dp Dn
Dm
Dk Dh Dg Df De Dd Dc Db Da Cy Cr Cp Cn
Marking
Mg
Mf Me Md
Mc Mb Ma
Ky
Kr Kp Kn
Km
Kk Kh Kg
Kf Ke Kd
Kc
Datasheet
Detection
Voltage
4.1V BD49K41
4.0V BD49K40
3.9V BD49K39
3.8V BD49K38
3.7V BD49K37
3.6V BD49K36
3.5V BD49K35
3.4V BD49K34
3.3V BD49K33
3.2V BD49K32
3.1V BD49K31
3.0V BD49K30
2.9V BD49K29
2.8V BD49K28
2.7V BD49K27
2.6V BD49K26
2.5V BD49K25
2.4V BD49K24
2.3V BD49K23
Detection
Voltage
4.1V BD49L41
4.0V BD49L40
3.9V BD49L39
3.8V BD49L38
3.7V BD49L37
3.6V BD49L36
3.5V BD49L35
3.4V BD49L34
3.3V BD49L33
3.2V BD49L32
3.1V BD49L31
3.0V BD49L30
2.9V BD49L29
2.8V BD49L28
2.7V BD49L27
2.6V BD49L26
2.5V BD49L25
2.4V BD49L24
2.3V BD49L23
Number
Number
Part
Part
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TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Absolute Maximum Ratings (Ta=25°C)
Parameter Symbol Limits Unit
Power Supply Voltage VDD-GND -0.3 to +10 V
Output Voltage
Dissipation
Nch Open Drain Output GND-0.3 to +10
CMOS Output
SSOP5
VSOF5
*1*3
*2*3
V
OUT
540 Power
Pd
GND-0.3 to V
210
DD
+0.3
mW
Operating Temperature Topr -40 to +105 °C
Ambient Storage Temperature Tstg -55 to +125 °C
*1 Use above Ta=25°C results in a 5.4mW loss per degree. *2 Use above Ta=25°C results in a 2.1mW loss per degree. *3 When a ROHM standard circuit board (70mm×70mm×1.6mm glass epoxy board) is mounted.
Electrical Characteristics (Unless Otherwise Specified Ta=-40 to 105°C)
Parameter Symbol Condition
Detection Voltage V
Output Delay Time “LÆH” tPLH
Circuit Current when ON ICC1 VDD=V
Circuit Current when OFF ICC2 VDD=V
Operating Voltage Range VOPL
‘Low’Output Current (Nch) IOL
‘High’Output Current (Pch) (BD49xxx Series)
Leak Current when OFF (BD48xxx Series)
Detection Voltage Temperature coefficient
Hysteresis Voltage V
V
(T) : Standard Detection Voltage(2.3V to 6.0V, 0.1V step)
DET
RL: Pull-up resistor to be connected between VOUT and power supply.
RL=470k, VDD=HÆL
DET
CL=100pF R=100k Vout=GNDÆ50%
V
DET
V
DET
DET
-0.2V
+2.0V
*1
*1
DET
V
DET
V
DET
V
DET
V
DET
V
DET
V
DET
VOL0.4V, Ta=25 to 105°C, RL=470k 0.95 - -
V
OL0.4V, Ta=-40 to 25°C, RL=470k 1.20 - -
VDS=0.5V, VDD=1.5V, V
V
DS=0.5V, VDD=2.4V, V
VDS=0.5V, VDD=4.8V, V
IOH
I
V
DET
VDS=0.5V, VDD=6.0V, V
DS=0.5V, VDD=8.0V, V
V
VDD=VDS=10V
leak
Ta=-40°C to 105°C
/T
(Designed Guarantee)
VDD=LÆHÆL V
DET
=2.3-6.0V 0.4 1.0 -
DET
=2.7-6.0V 2.0 4.0 -
DET
=2.3-4.2V 0.7 1.4 -
DET
=4.3-5.2V 0.9 1.8 -
DET
=5.3-6.0V 1.1 2.2 -
DET
Min. Typ. Max.
V
(T)
DET
*1
×0.99
*2
- - 100 µs
=2.3-3.1V - 0.51 1.53
=3.2-4.2V - 0.56 1.68
=4.3-5.2V - 0.60 1.80
=5.3-6.0V - 0.66 1.98
=2.3-3.1V - 0.75 2.25
=3.2-4.2V - 0.80 2.40
=4.3-5.2V - 0.85 2.55
=5.3-6.0V - 0.90 2.70
*1
- - 0.1 µA
- ±100 ±360 ppm/°C
×0.03 V
DET
Limit
V
DET
×0.05 V
DET
CL: Capacitor to be connected between VOUT and GND. Designed Guarantee. (Outgoing inspection is not done on all products.) *1 Guarantee is Ta=25°C.
*2 t
PLH:VDD=(V
typ.-0.5V)Æ(V
DET
typ.+0.5V)
DET
V
(T)
Datasheet
V
(T)
DET
×1.01
×0.08 V
DET
Unit
V
µA
µA
V
mA
mA
www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Block Diagrams
Vref
VDD
Vref
Fig.1 BD48xxx series
VDD
Fig.2 BD49xxx series
GND
GND
OUT
V
VOUT
Datasheet
www.rohm.com © 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Typical Performance Curves
Datasheet
2.0
BD48x42
BD4842G/FVE
[A]
DD
1.5 I
BD49x42
1.0
0.5
CIRCUIT CURRENT
0.0
012345678910
DD
SUPPLY VOLTAGE :VDD[V]
V
Fig.3 Circuit Current
45
BD4942G/FVE
40
[mA]
OH
I
35
BD49x42
30
25
20
VDD=8.0V
15
10
5
0
"HIGH" OUTPUT CURRENT
VDD=6.0V
VDD=4.8V
0123456
DRAIN-SOURCE VOLTAGE : V
20
[mA]
OL
I
15
BD4842G/FVE
BD48x42
BD49x42
10
VDD=2.4V
5
VDD=1.2V
0
"LOW" OUTPUT CURRENT
0.0 0.5 1.0 1.5 2.0 2.5
DRAIN-SOURCE VOLTAGE : V
DS
[V]
Fig.4 “Low” Output Current
9
[V]
OUT
V
8
7
6
BD4842G/F VE
BD48x42
BD49x42
5
4
3
Ta=25
DS
[V]
2
OUTPUT VOLTAGE
1
Ta=25
0
00.5 11.522.5 33.544.5 55.5
VDD SUPPLY VOLTAGE :VDD[V]
Fig.5 “High” Output Current
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TSZ22111・15・001
Fig.6 I/O Characteristics
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
Datasheet
OUTPUT VOLTAGE
A]
μ
[
DD1
I
[V]
OUT
V
:
1.0
0.8
0.6
0.4
0.2
0.0
1.5
1.0
BD48x42
BD4842G/FVE
BD49x42
0
0.5
1
1.5
SUPPLY VOLTAGE :
Fig.7 Operating Limit Voltage
BD4842G/F VE
BD48x42
BD49x42
BD48x42x
2
[V]
BD48x42x
5.4
[V]
DET
V
5.0
Low to High(V
4.6
4.2
2.5
3.8
DETECTION VOLTAGE:
3.4
~ ~
3.0
-40 0 40 80
High to Low(V
TEMPERATURE
BD4842G/FVE
BD48x42
BD48x42x
BD49x42
+ΔV
:
Ta[ ℃]
Fig.8 Detection Voltage
Release Voltage
1.5
A]
μ
[
DD2
I
BD48x42x
BD4842G/F VE
BD48x42
BD49x42
1.0
0.5
0.0
CIRCUIT CURRENT WHEN ON
-40 -20 0 20 40 60 80 100
TEMPERATURE : Ta[℃]
Fig.9 Circuit Current when ON
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TSZ22111・15・001
0.5
0.0
CIRCUIT CURRENT WHEN OFF
-40 -20 0 20 40 60 80 100
TEM PERATURE : Ta[℃]
Fig.10 Circuit Current when OFF
TSZ02201-0R7R0G300030-1-2
08.JUL.2012.Rev.006
BD48xxx series BD49xxx series
1.5
BD48x42x
BD4842G/FVE
[V]
OPL
V
BD48x42
BD49x42
1.0
0.5
MINIMUM OPERATION VOLTAGE
0.0
-40 -20 0 20 40 60 80 100
TEMPERATURE : Ta[℃]
Fig.11 Operating Limit Voltage
Datasheet
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BD48xxx series BD49xxx series
Datasheet
Application Information Explanation of Operation
For both the open drain type (Fig.12) and the CMOS output type (Fig.13), the detection and release voltages are used as threshold voltages. When the voltage applied to the V
pins reaches the applicable threshold voltage, the V
DD
OUT
voltage switches from either “High” to “Low” or from “Low” to “High”. Please refer to the Timing Waveform and Electrical Characteristics for information on hysteresis.
or another
DD
Because the BD48xxx series uses an open drain output type, it is possible to connect a pull-up resistor to V power supply [The output “High” voltage (V
R1
Vref
R2
R3
) in this case becomes VDD or the voltage of the other power supply].
OUT
Q1
V
DD
R
L
V
OUT
GND
Vref
R1
R2
R3
Q2
Q1
Fig.12 (BD48xxx series Internal Block Diagram) Fig.13 (BD49xxx series Internal Block Diagram)
Reference Data
Examples of Leading (t
Part Number t
) and Falling (t
PLH
) Output
PHL
(s) t
PLH
PHL
(s)
BD48x45 39.5 87.8
BD49x45 32.4 52.4
V
=4.3VÆ5.1V VDD=5.1VÆ4.3V
DD
*This data is for reference only.
The figures will vary with the application, so please confirm actual operating conditions before use.
Timing Waveform
Example: the following shows the relationship between the input voltages VDD and the output voltage V input power supply voltage V
is made to sweep up and sweep down (the circuits are those in Fig.12 and 13).
DD
when the
OUT
1
When the power supply is turned on, the output is unsettled from
VDD
VDET+ΔVDET
V
OUT
0V
VOH
VOL
VDET
VOPL
tPHL
tPLH
tPHL
Fig.14 Timing Waveform
tPLH
after over the operating limit voltage (V possible that the reset signal is not valid when the rise time of V
DET
PHL
+ V
.
but less than the reset release
OPL
), the output voltages will switch to Low.
DET
faster than t
2
When VDD is greater than V
voltage (V
3
If VDD exceeds the reset release voltage (V
V
switches from L to H.
OUT
4
If VDD drops below the detection voltage (V
supply is powered down or when there is a power supply fluctuation,
switches to L (with a delay of t
V
OUT
5
The potential difference between the detection voltage and the
PHL
release voltage is known as the hysteresis width (V system is designed such that the output does not flip-flop with power
).
OPL
) until t
DET
. Therefore it is
PHL
+ V
DET
) when the power
supply fluctuations within this hysteresis width, preventing malfunctions due to noise.
terminal
V
DD
V
OUT
GND
DD
), then
DET
). The
DET
is
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BD48xxx series BD49xxx series
Circuit Applications
Examples of a common power supply detection reset circuit.
DD1
V
L
R
BD48xxx
C
L
capacitor is for
(
noise filtering
R
ST
Micro controller
Fig.15 Open Drain Output Type
DD1
V
BD49xxx
C
capacitor is for
(
filtering
ST
R
L
GND
Fig.16 CMOS Output Type
DD2
V
GND
Micro controller
Datasheet
Application examples of BD48xxx series (Open Drain output type) and BD49xxx series (CMOS output type) are shown below.
CASE1: the power supply of the microcontroller (V differs from the power supply of the reset detection (V Use an open drain output type (BD48xxx) device with a load resistance R
CASE2: the power supply of the microcontroller (V same as the power supply of the reset detection (V Use a CMOS output type (BD49xxx) device or an open drain device with a pull up resistor between output and VDD1.
When a capacitance C the V
pin (the reset signal input terminal of the
OUT
microcontroller), please take into account the waveform of the rise and fall of the output voltage (V
The Electrical characteristics were measured using
= 470k and CL = 100pF.
R
L
attached as shown in figure 15.
L
for noise filtering is connected to
L
).
OUT
DD1
DD1
DD1
).
DD2
).
) is
)
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BD48xxx series BD49xxx series
Datasheet
Operational Notes
1 . Absolute maximum range
Absolute Maximum Ratings are those values beyond which the life of a device may be destroyed. We cannot be defined the failure mode, such as short mode or open mode. Therefore a physical security countermeasure, like fuse, is to be given when a specific mode to be beyond absolute maximum ratings is considered.
2 . GND potential
GND terminal should be a lowest voltage potential every state. Please make sure all pins, which are over ground even if, include transient feature.
3 . Electrical Characteristics
Be sure to check the electrical characteristics that are one the tentative specification will be changed by temperature, supply voltage, and external circuit.
4 . Bypass Capacitor for Noise Rejection
Please put into the capacitor of 1F or more between V
pin and GND, and the capacitor of about 1000pF between V
DD
OUT
and GND, to reject noise. If extremely big capacitor is used, transient response might be late. Please confirm sufficiently for the point.
5 . Short Circuit between Terminal and Soldering
Don’t short-circuit between Output pin and V
pin, Output pin and GND pin, or VDD pin and GND pin. When soldering the IC
DD
on circuit board, please be unusually cautious about the orientation and the position of the IC. When the orientation is mistaken the IC may be destroyed.
6 . Electromagnetic Field
Mal-function may happen when the device is used in the strong electromagnetic field.
7 . The V
line inpedance might cause oscillation because of the detection current.
DD
8. A V
-GND capacitor (as close connection as possible) should be used in high VDD line impedance condition.
DD
9 . Lower than the mininum input voltage makes the V
OUT high impedance, and it must be VDD in pull up (VDD) condition.
10. This IC has extremely high impedance terminals. Small leak current due to the uncleanness of PCB surface might cause
unexpected operations. Application values in these conditions should be selected carefully. If the leakage is assumed between the V
terminal and the GND terminal, the pull-up resistor should be less than 1/10 of the assumed leakage
OUT
resistance.
11. External parameters
The recommended parameter range for R
is 10k to 1M. There are many factors (board layout, etc) that can affect
L
characteristics. Please verify and confirm using practical applications.
12. Power on reset operation
Please note that the power on reset output varies with the V
rise up time. Please verify the actual operation.
DD
13. Precautions for board inspection
Connecting low-impedance capacitors to run inspections with the board may produce stress on the IC. Therefore, be certain to use proper discharge procedure before each process of the test operation. To prevent electrostatic accumulation and discharge in the assembly process, thoroughly ground yourself and any equipment that could sustain ESD damage, and continue observing ESD-prevention procedures in all handing, transfer and storage operations. Before attempting to connect components to the test setup, make certain that the power supply is OFF. Likewise, be sure the power supply is OFF before removing any component connected to the test setup.
14. When the power supply, is turned on because of in certain cases, momentary Rash-current flow into the IC at the logic
unsettled, the couple capacitance, GND pattern of width and leading line must be considered.
pin
Status of this document The Japanese version of this document is formal specification. A customer may use this translation version only for a reference to help reading the formal version. If there are any differences in translation version of this document formal version takes priority.
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Datasheet
Datasheet
Notice
General Precaution
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2) All information contained in this document is current as of the issuing date and subject to change without any prior notice. Before purchasing or using ROHM’s Products, please confirm the latest information with a ROHM sales representative.
Precaution on using ROHM Products
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2) ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which a failure or malfunction of our Products may cause. The following are examples of safety measures:
[a] Installation of protection circuits or other protective devices to improve system safety [b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure
3) Our Products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any special or extraordinary environments or conditions. If you intend to use our Products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary:
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2S, NH3, SO2, and NO2
H [d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves [e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items [f] Sealing or coating our Products with resin or other coating materials [g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of
flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning residue after soldering
[h] Use of the Products in places subject to dew condensation
4) The Products are not subject to radiation-proof design.
5) Please verify and confirm characteristics of the final or mounted products in using the Products.
6) In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse) is applied, confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect product performance and reliability.
7) De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual ambient temperature.
8) Confirm that operation temperature is within the specified range described in the product specification.
9) ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in this document.
2,
Notice - Rev.003
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Datasheet
Precaution for Mounting / Circuit board design
1) When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product performance and reliability.
2) In principle, the reflow soldering method must be used; if flow soldering method is preferred, please consult with the ROHM representative in advance.
For details, please refer to ROHM Mounting specification
Precautions Regarding Application Examples and External Circuits
1) If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the characteristics of the Products and external components, including transient characteristics, as well as static characteristics.
2) You agree that application notes, reference designs, and associated data and information contained in this document are presented only as guidance for Products use. Therefore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information.
Precaution for Electrostatic
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2) Even under ROHM recommended storage condition, solderability of products out of recommended storage time period may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is exceeding the recommended storage time period.
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Datasheet
Other Precaution
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