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High-accuracy Low current consumption General-purpose
5 4
RESET IC
1
BD47XXG series
Description BD47XXG is a series of RESET ICs developed to prevent system error at transient state when the power of CPU and logic circuit switches ON/OFF or shutdown. These ICs consist of Power, GND, and reset output to detect power supply voltage of various systems and to output reset signal. These ICs are more practical for portable products because of their ultra-small package and low current consumption. Features 1) Detection voltage: 0.1V step line up 1.9~4.6V(Typ.) 2) High-accuracy voltage detection Vs2%(Max.) 3) Low current consumption 4) "L" reset output of open collector 5) Small SMP5 package Applications Portable products, Equipments with CPU and logic circuit Series characteristics
Part No. BD4746G BD4745G BD4744G BD4743G BD4742G BD4741G BD4740G BD4739G BD4738G BD4737G BD4736G BD4735G BD4734G BD4733G BD4732G BD4731G BD4730G BD4729G BD4728G BD4727G BD4726G BD4725G BD4724G BD4723G BD4722G BD4721G BD4720G BD4719G Detection voltage Vs (V) Min 4.508 4.410 4.312 4.214 4.116 4.018 3.920 3.822 3.724 3.626 3.528 3.430 3.332 3.234 3.136 3.038 2.940 2.842 2.744 2.646 2.548 2.450 2.352 2.254 2.156 2.058 1.960 1.862 Typ. 4.600 4.500 4.400 4.300 4.200 4.100 4.000 3.900 3.800 3.700 3.600 3.500 3.400 3.300 3.200 3.100 3.000 2.900 2.800 2.700 2.600 2.500 2.400 2.300 2.200 2.100 2.000 1.900 Max. 4.692 4.590 4.488 4.386 4.284 4.182 4.080 3.978 3.876 3.774 3.672 3.570 3.468 3.366 3.264 3.162 3.060 2.958 2.856 2.754 2.652 2.550 2.448 2.346 2.244 2.142 2.040 1.938
Consumption current (A Typ.) ICCH ICCL 1.5 1.6 1.5 1.6 1.5 1.6 1.6 1.5 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.6 1.5 1.6 1.5 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 1.5 1.6 Hysteresis voltage (mV)
2
3
1pin : N.C. 2pin : SUB 3pin : GND 4pin : Vout 5pin : Vcc
2.90.2 (5) (4) 2.80.2 0.2 1.6 +0.1 -
(UNIT:mm)
(1) (2) (3) 1.25MAX 1.1 0.050.05 0.05
0.95
0.05 0.42 +0.04 -
0.1
SMP5
Operating output current (mA)
0.2MIN
0.05 0.13 +0.03 -
Package
50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50
15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15
SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5 SMP5
Absolute Maximum Ratings(Ta=25C)
Parameter Power supply voltage Output voltage Power dissipation (SMP5) Operating temperature range Storage temperature range Symbol Vcc Po Pd Topr Tstg Limits -0.3 ~ +10 -0.3 ~ +10 150 * -20 ~ +75 -40 ~ +125 Unit V V
mW C C
Note) The ratings shown above indicate breakdown limit of the pin and should not be regarded as the values that guarantee the operation.
* Derating : 1.5mW/C for operation above Ta=25C
Electrical characteristics(Unless otherwise noted; Ta=25C)
Parameter Detection voltage
Detection voltage temperature coefficient
Symbol Vs Vs/T Vs TPLH TPHL VOL Icc1 Icc2 VOPL IL IOL
Min. -2% -- 30 -- -- -- -- -- -- -- 3.0
Typ. 1.9~4.6 0.01 50 20 60 0.1 1.5 1.6 0.65 -- 15.0
Max. +2% -- 100 50 120 0.4 3.0 3.2 0.85 0.1 --
Unit V %/C mV S S V A A V A mA
Conditions RL=4.7k, Vcc=HAEL RL=4.7K, Ta=-20~+75C RL=4.7K, Vcc=LAEHAEL CL=100PF, RL=4.7K CL=100PF, RL=4.7K
*1 *2
Hysteresis voltage "H" transfer delay time "L" transfer delay time "L" output voltage Circuit current (At ON mode) Circuit current (At OFF mode) Operating limit voltage Output leak current "L" output current
Vcc=VsMIN.-0.05V, RL=4.7K Vcc=VsMIN.-0.05V, RL= Vcc=VsTYP./0.85V, RL= RL=4.7K, VOL0.4V Vcc=Vout=10V Vo=0.4V, Vcc=VsMIN.-0.05V
*1 TPLH : Vcc=(Vs typ.-0.4V)AE(Vs typ.+0.4V) *2 TPHL : Vcc=(Vs typ.+0.4V)AE(Vs typ.-0.4V)
Timing waveform VCC
VCC VS+VS VS
Transfer delay time measurement circuit
0.22uF
RL=4.7K
5
4
Vout
VOUT
0V VOH TPLH TPHL
VCC
Vcc
100pF
BD47XXG
NC SUB GND
1
2
3
VOL
Application Circuit
VDD VCC
5
Micro controller
4 reset pin
Vout
Vref
3
BD47XXG
GND
Characteristic diagram and Measurement circuit (When BD4729G is measured.)
Current consumption
10 9.5 9 8.5 8 7.5 7 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 Icc1=1.34A 1 Icc2=1.46A 0.5 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 Vcc (V)
I/O characteristic
6 5
4
Icc (A)
Vout (V)
3
2 Vs=2.9V 1 dVs=50mV 0 Vs=2.95V
0
0.5
1
1.5
2
2.5
3 3.5 Vcc (V)
4
4.5
5
5.5
6
A V
10F
R=4.7K
Vcc
VOUT
NC
Vcc VOUT
BD4729G
V
GND
BD4729G 10F GND
V
Operating limit voltage
1000 900 800
'L' output current
800 700 600
700 600 Vout (mV)
500 Vout (mV) 400 300 200
500 400 300 200 100 0 0 VOPL=0.675V
IOL=12.194mA@Vo=400mV
100 0
0.25 0.5 0.75
1
1.25 1.5 1.75 Vcc (V)
2
2.25 2.5 2.75
0
2.5
5
7.5 10 12.5 15 17.5 20 22.5 25 27.5 30 32.5 Iol (mA)
R=4.7K Vcc VOUT
Vcc
VOUT
A V
IOL
BD4729G
V
BD4729G 10F GND
V
10F GND
Setting of the RESET signal delay time Delay time can be set by capacitor CL and resistance RL connected to the output pin as shown below. CL is charged by RL when Vcc is rising. The delay time caused by charging is determined by the time constant of CL, RL and the threshold voltage of RESET pin. RESET IC discharges CL forcedly when Vcc is falling. The delay time of RESET signal is determined by adding the delay time of single RESET IC to each time.
VCC VS+VS VS
VCC
Vcc BD47XXG Vout GND
RL CL
VDD RESET GND
CPU Micro-controller
0V
RESET
(=VOUT)
VOH TPLH VOL TPHL TPLH
Part number and Marking of samples
(5)
(4)
Marking
BA BB BC BD BE BF
Voltage
1.9V 2.0V 2.1V 2.2V 2.3V 2.4V 2.5V 2.6V 2.7V 2.8V
Part No.
BD4719 BD4720 BD4721 BD4722 BD4723 BD4724 BD4725 BD4726 BD4727 BD4728
Marking
BK BL BM BN B4 BP BQ BR BS BT
Voltage
2.9V 3.0V 3.1V 3.2V 3.3V 3.4V 3.5V 3.6V 3.7V 3.8V
Part No.
BD4729 BD4730 BD4731 BD4732 BD4733 BD4734 BD4735 BD4736 BD4737 BD4738
Marking
BU BV BW BX BY BZ B1 B2
Voltage
3.9V 4.0V 4.1V 4.2V 4.3V 4.4V 4.5V 4.6V
Part No.
BD4739 BD4740 BD4741 BD4742 BD4743 BD4744 BD4745 BD4746
(1)
(2)
(3)
Lot.No
BG BH B3 BJ
Marking
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document use silicon as a basic material. Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of with would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. About Export Control Order in Japan Products described herein are the objects of controlled goods in Annex 1 (Item 16) of Export Trade Control Order in Japan. In case of export from Japan, please confirm if it applies to "objective" criteria or an "informed" (by MITI clause) on the basis of "catch all controls for Non-Proliferation of Weapons of Mass Destruction.
Appendix1-Rev1.0

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