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BD4734G Dataheets PDF



Part Number BD4734G
Manufacturers Rohm
Logo Rohm
Description RESET
Datasheet BD4734G DatasheetBD4734G Datasheet (PDF)

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. F.

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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 Vs±2%(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 (µA 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 2.9±0.2 (5) (4) 2.8±0.2 0.2 1.6 + –0.1 (UNIT:mm) (1) (2) (3) 1.25MAX 1.1± 0.05±0.05 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=25˚C) 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=25˚C Electrical characteristics(Unless otherwise noted; Ta=25˚C) 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 µS µS V µA µA V µA mA Conditions RL=4.7kΩ, Vcc=HÆL RL=4.7KΩ, Ta=–20~+75˚C RL=4.7KΩ, Vcc=LÆHÆL CL=100PF, RL=4.7KΩ CL=100PF, RL=4.7KΩ *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=4.7KΩ Vcc=VsMIN.–0.05V, RL=∞ Vcc=VsTYP./0.85V, RL=∞ RL=4.7KΩ, VOL≥0.4V Vcc=Vout=10V Vo=0.4V, Vcc=VsMIN.–0.05V *1 TPLH : Vcc=(Vs typ.–0.4V)Æ(Vs typ.+0.4V) *2 TPHL : Vcc=(Vs typ.+0.4V)Æ(Vs typ.–0.4V) Timing waveform VCC VCC VS+∆VS VS Transfer delay time measurement circuit 0.22uF RL=4.7KΩ 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=1.34µA 1 Icc2=1.46µA 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 (µA) 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 10µF R=4.7K Vcc VOUT NC Vcc VOUT BD4729G V GND BD4729G 10µF 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 10µF GND V 10µF GND Setting of the RESET signal delay time Delay time can be set by capacitor CL and resistanc.


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