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Voltage Detector IC Series
Standard CMOS Voltage Detector IC
BD48G, BD48FVE, BD49G, BD49FVE series
No.09006EAT04
Description ROHM's BD48G/FVE and BD49G/FVE series are highly accurate, low current consumption reset IC series. The lineup was established with tow output types (Nch open drain and CMOS output) and detection voltages range from 2.3V to 6.0V in increments of 0.1V, so that the series may be selected according the application at hand. Features 1) Detection voltage: 2.3V to 6.0V (Typ.), 0.1V steps 2) High accuracy detection voltage: 1.0% 3) Ultra-low current consumption: 0.8A (Typ.) 4) Nch open drain output (BD48G/FVE), CMOS output (BD49G/FVE) 5) Compact packages VSOF5: BD48FVE, BD49FVE SSOP5: BD48G, BD49G Applications All electronic devices that use microcontrollers and logic circuits Selection Guide No.
1
Specifications Output Circuit Format Detection Voltage Package
Description 8:Open Drain Output, 9:CMOS Output
Example: Displays VS over a 2.3V to 6.0V range in 0.1V increments. (2.9V is marked as "29")
Part Number : BD4
1 2 3
2 3
G:SSOP5 / FVE:VSOF5
Lineup
Marking EW EV EU ET ES ER EQ EP EN EM EL EK EJ EH EG EF EE ED EC 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 BD4860 BD4859 BD4858 BD4857 BD4856 BD4855 BD4854 BD4853 BD4852 BD4851 BD4850 BD4849 BD4848 BD4847 BD4846 BD4845 BD4844 BD4843 BD4842 Marking EB EA DV DU DT DS DR DQ DP DN DM DL DK DJ DH DG DF DE DD 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 BD4841 BD4840 BD4839 BD4838 BD4837 BD4836 BD4835 BD4834 BD4833 BD4832 BD4831 BD4830 BD4829 BD4828 BD4827 BD4826 BD4825 BD4824 BD4823 Marking GW GV GU GT GS GR GQ GP GN GM GL GK GJ GH GG GF GE GD GC 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 BD4960 BD4959 BD4958 BD4957 BD4956 BD4955 BD4954 BD4953 BD4952 BD4951 BD4950 BD4949 BD4948 BD4947 BD4946 BD4945 BD4944 BD4943 BD4942 Marking GB GA FV FU FT FS FR FQ FP FN FM FL FK FJ FH FG FF FE FD 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 BD4941 BD4940 BD4939 BD4998 BD4937 BD4936 BD4935 BD4934 BD4933 BD4932 BD4931 BD4930 BD4929 BD4928 BD4927 BD4926 BD4925 BD4924 BD4923
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1/9
2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Absolute maximum ratings (Ta=25C) Parameter Power Supply Voltage Nch Open Drain Output Output Voltage CMOS Output *1*3 SSOP5 Power *2*3 Dissipation VSOF5 Operating Temperature Ambient Storage Temperature
Technical Note
Symbol VDD-GND VOUT Pd Topr Tstg
Limits -0.3 ~ +10 GND-0.3 ~ +10 GND-0.3 ~ VDD+0.3 540 210 -40 ~ +105 -55 ~ +125
Unit V V mW C C
*1 Use above Ta=25C results in a 5.4mW loss per degree. *2 Use above Ta=25C results in a 2.1mW loss per degree. *3 When a ROHM standard circuit board (70mmx70mmx1.6mm glass epoxy board) is mounted.
Electrical characteristics (Unless Otherwise Specified Ta=-40 to 105C) Parameter Detection Voltage Output Delay Time "LH" Symbol VS tPLH Condition RL=470k, VDD=HL CL=100pF R=100k Vout=GND50% VS=2.3-3.1V VS=3.2-4.2V VDD=VS-0.2V *1 VS=4.3-5.2V VS=5.3-6.0V VS=2.3-3.1V VS=3.2-4.2V VDD=VS+2.0V *1 VS=4.3-5.2V VS=5.3-6.0V VOL0.4V, Ta=25~105C, RL=470k VOL0.4V, Ta=-40~25C, RL=470k VDS=0.5V, VDD=1.5V, VS=2.3-6.0V VDS=0.5V, VDD=2.4V, VS=2.7-6.0V VDS=0.5V, VDD=4.8V, VS=2.3-4.2V VDS=0.5V, VDD=6.0V, VS=4.3-5.2V VDS=0.5V, VDD=8.0V, VS=5.3-6.0V VDD=VDS=10V Ta=-40C to 105C (Designed Guarantee) VDD=LHL
*1 *2
Min. VS(T) x0.99 0.95 1.20 0.4 2.0 0.7 0.9 1.1
Limit Typ. VS(T) 0.51 0.56 0.60 0.66 0.75 0.80 0.85 0.90 1.0 4.0 1.4 1.8 2.2 100
Max. VS(T) x1.01 100 1.53 1.68 1.80 1.98 2.25 2.40 2.55 2.70 0.1 360
Unit V s
Circuit Current when ON
ICC1
A
Circuit Current when OFF
ICC2
A
Minimum Operating Voltage `Low'Output Current (Nch) `High'Output Current (Pch) (BD49G/FVE) Leak Current when OFF (BD48G/FVE) Detection Voltage Temperature coefficient Hysteresis Voltage
VOPL IOL
V mA
IOH
mA
Ileak VS/T VS
*1
-
A ppm/C V
VSx0.03 VSx0.05 VSx0.08
VS(T) : Standard Detection Voltage(2.3V to 6.0V, 0.1V step) RL: Pull-up resistor to be connected between VOUT and power supply. CL: Capacitor to be connected between VOUT and GND. Designed Guarantee. (Outgoing inspection is not done on all products.) *1 Guarantee is Ta=25C. *2 tPLH:VDD=(Vs typ.-0.5V)(Vs typ.+0.5V)
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2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Block Diagrams
BD48G/FVE
VDD
Technical Note
BD49G/FVE
VDD
VOUT
VOUT
Vref
Vref
GND
GND
Fig.1
TOP VIEW
Fig.2
TOP VIEW
SSOP5 PIN No. 1 2 3 4 5 Symbol VOUT VDD GND N.C. N.C. Function Reset Output Power Supply Voltage GND Unconnected Terminal Unconnected Terminal PIN No. 1 2 3 4 5 Symbol VOUT SUB N.C. GND VDD
VSOF5 Function Reset Output Substrate* Unconnected Terminal GND Power Supply Voltage
*Connect the substrate to GND.
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2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Reference Data (Unless specified otherwise, Ta=25C)
Technical Note
CIRCUIT CURRENT IDD [A]
BD4842G/FVE 1.5
BD4842G/FVE 15
"HIGH" OUTPUT CURRENT IOH [mA]
"LOW" OUTPUT CURRENT IOL [mA]
2.0
20
45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 DRAIN-SOURCE VOLTAGE VDS[V] VDD=6.0V VDD=4.8V VDD=8.0V BD4942G/FVE
1.0
10
VDD=2.4V
0.5
5 VDD=1.2V 0 0.0 0.5 1.0 1.5 2.0 2.5
0.0 0 1 2 3 4 5 6 7 8 9 10
VDD SUPPLY VOLTAGE VDD[V]
DRAIN-SOURCE VOLTAGE VDS[V]
Fig.3 Circuit Current
Fig.4 "Low" Output Current
Fig.5 "High" Output Current
9
1.0 OUTPUT VOLTAGE VOUT[V]
BD4842G/FVE
OUTPUT VOLTAGE VOUT [V]
7 6 5 4 3 2 1 0 Ta=25
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
0.8
DETECTION VOLTAGE VS[V]
8
BD4842G/FVE
5.4 5.0
BD4842G/FVE
Low to HighVS+VS
0.6
4.6 4.2 3.8 3.4 3.0 -40 0 40 80 High to LowVS
0.4
Ta=25
0.2
0.0 0 0.5 1 1.5 2 2.5 SUPPLY VOLTAGE [V]
VDD SUPPLY VOLTAGE VDD[V]
TEMPERATURE Ta[]
Fig.6 I/O Characteristics
Fig.7 Operating Limit Voltage
Fig.8 Detection Voltage Release Voltage
CIRCUIT CURRENT WHEN ON IDD1[A]
CIRCUIT CURRENT WHEN OFF I DD2[A]
1.5 BD4842G/FVE
1.5 BD4842G/FVE
MINIMUM OPERATION VOLTAGE VOPL[V]
1.5 BD4842G/FVE
1.0
1.0
1.0
0.5
0.5
0.5
0.0 -40 -20
0
20
40
60
80 100
0.0 -40 -20
0
20
40
60
80 100
0.0 -40 -20
0
20
40
60
80 100
TEMPERATURE Ta[]
TEMPERATURE Ta[]
TEMPERATURE Ta[]
Fig.9 Circuit Current when ON
Fig.10 Circuit Current when OFF
Fig.11 Operating Limit Voltage
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4/9
2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Technical Note
Reference Data Examples of Leading (TPLH) and Falling (TPHL) Output Part Number TPLH (s) TPHL (s) BD4845G/FVE 39.5 87.8 BD4945G/FVE 32.4 52.4 VDD=4.3V5.1V VDD=5.1V4.3V *This data is for reference only. The figures will vary with the application, so please confirm actual operating conditions before use. 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 VDD pins reaches the applicable threshold voltage, the VOUT terminal voltage switches from either "High" to "Low" or from "Low" to "High". Because the BD48G/FVE series uses an open drain output type, it is possible to connect a pull-up resistor to VDD or another power supply [The output "High" voltage (VOUT) in this case becomes VDD or the voltage of the other power supply].
VDD
VDD
R1 Vref VOUT R2 Q1
RL
Vref
R1 Q2 VOUT Q1
R2
R3 GND
R3 GND
Fig.12 (BD48 Type Internal Block Diagram)
Fig.13 (BD49 Type Internal Block Diagram)
Timing Waveform Example: the following shows the relationship between the input voltages VDD and the output voltage VOUT when the input power supply voltage VDD is made to sweep up and sweep down (the circuits are those in Fig.12 and 13). When the power supply is turned on, the output is unsettled from after over the operating limit voltage (VOPL) until TPHL. There fore it is possible that the reset signal is not outputted when the rise time of VDD is faster than TPHL. 2 When VDD is greater than VOPL but less than the reset release voltage (VS + VS), the output voltages will switch to Low. 3 If VDD exceeds the reset release voltage (VS + VS), then VOUT switches from L to H. 4 If VDD drops below the detection voltage (VS) when the power supply is powered down or when there is a power supply fluctuation, VOUT switches to L (with a delay of TPHL). 5 The potential difference between the detection voltage and the release voltage is known as the hysteresis width (VS). The system is designed such that the output does not flip-flop with power supply fluctuations within this hysteresis width, preventing malfunctions due to noise.
1
VDD
VDET+VDET VDET VOPL 0V
VOUT
VOH TPHL VOL TPLH TPHL TPLH
Fig.14
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5/9
2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Circuit Applications 1) Examples of a common power supply detection reset circuit.
VDD1 RL BD48 Microcontroller VDD2
Technical Note
Application examples of BD48G/FVE series (Open Drain output type) and BD49G/FVE series (CMOS output type) are shown below. CASE1: the power supply of the microcontroller (VDD2) differs from the power supply of the reset detection (VDD1). Use the open drain output type (BD48G/FVE) attached a load resistance (RL) between the output and VDD2. (As shown Fig.15) CASE2: the power supply of the microcontroller (VDD1) is same as the power supply of the reset detection (VDD1). Use CMOS output type (BD49G/FVE) or open drain output type (BD48G/FVE) attached a load resistance (RL) between the output and Vdd1. (As shown Fig.16)
CL
Noise-filtering Capacitor
GND
Fig.15 Open Collector Output Type
VDD1
BD49
Microcontroller
CL
(Noise-filtering Capacitor
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).
GND
Fig.16 CMOS Output Type
2) The following is an example of a circuit application in which an OR connection between two types of detection voltages resets the microcontroller.
VDD1 VDD2 VDD3
RL Microcontroller RST
BD48
BD48
GND
Fig.17
When there are many power supplies of the system, power supplies VDD1 and VDD2 are being monitored separately, and it is necessary to reset the microcomputer, it is possible to use an OR connection on the open drain output type BD48G/FVE series to pull-up to the desired voltage (VDD3) as shown in Fig.17 and make the output "High" voltage matches the power supply voltage VDD3 of the microcontroller.
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6/9
2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Technical Note
Examples of the power supply with resistor dividers In applications where the power supply input terminal (VDD) of an IC with 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
R2 I1 VDD
R1 CIN
BD48 BD49 CL GND
VOUT
Fig.18
A voltage drop of [the through-current (I1)] x [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. IDD
Through Current
0
VDD VDET
Fig.19 Current Consumption vs. Power Supply Voltage
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7/9
2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Technical Note
Operation 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 VDD pin and GND, and the capacitor of about 1000pF between VOUT pin 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 VDD pin, Output pin and GND pin, or VDD pin and GND pin. When soldering the IC 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. 8. 9. The VDD line inpedance might cause oscillation because of the detection current. A VDD -GND capacitor (as close connection as possible) should be used in high VDD line impedance condition. Lower than the mininum input voltage makes the VOUT 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 VOUT terminal and the GND terminal, the pull-up resistor should be less than 1/10 of the assumed leak resistance. 11. External parameters The recommended parameter range for RL is 10k~1M. There are many factors (board layout, etc) that can affect characteristics. Please verify and confirm using practical applications. 12. Power on reset operation Please note that the power on reset output varies with the VDD rise up time. Please verify the actual operation. 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.
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2009.04 - Rev.A
BD48G, BD48FVE, BD49G, BD49FVE series
Part Number Selection
Technical Note
B
D
4
8
2
3
G
T
R
Standard CMOS Reset IC BD48: Open Drain Type BD49: CMOS Output Type
Reset Voltage Value 23: 2.3V to (0.1V step) 60: 6.0V
Package G: SSOP5 FVE: VSOF5
Taping Specifications Embossed Taping
SSOP5
(Unitmm)
+6 4 -4
SSOP5
Tape Embossed carrier tape 3000pcs
TR (The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand)
2.90.2
5 4
Quantity Direction of feed
2.80.2
1.6 -0.1
+0.2
1
2
3
0.13
1.25Max.
1.10.05
0.050.05
0.42 +0.05 -0.04 0.95 0.1
0.2Min.
+0.05 -0.03
XXX XXX
XXX XXX
XXX XXX
XXX XXX
XXX XXX
1Pin Reel
Direction of feed
* When you order, please order in times the amount of package quantity.
VSOF5
(Unitmm) VSOF5
Tape Quantity
1.00.05 1.60.05
54
Embossed carrier tape 3000pcs
TR (The direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand)
1.60.05 1.20.05
123
0.130.05
0.6Max.
0.5
0.220.05 0.08 M
0.2Max.
Direction of feed
XXX XXX
XXX XXX
XXX XXX
XXX XXX
XXX XXX
1Pin Reel
Direction of feed
*When you order, please order in times the amount of package quantity.
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9/9
2009.04 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law.
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