ROHM BD4719G Technical data
Voltage Detector IC Series
Bipolar
Voltage Detector ICs
BD47xx series
Datasheet
●General Description
The BD47xx Series is a reset IC that was developed to
prevent system errors at transient state when the
power of CPU or logic circuit switches ON/OFF or
momentary shut down. These ICs consist of three
terminals (power supply, GND and reset output) to
detect power supply voltages and outputs reset signals
of various systems. These ICs are ultra-compact and
are realized low current consumption, making them
ideal for portable products.
●Features
High accuracy detection
Low current consumption
Very small package
Open collector “L” reset output
●Ty pical A pplication Circuit
●Connection Diagram
SSOP5
TOP VIEW
BD47xx series
Marking
N.C. SUB GND
DD
VOUT
GND
V
OUTVDD
Lot. No
RL
CL
●Key Specifications
Detection voltage range: 1.9~4.6V (Typ.)
0.1V steps
High accuracy detection voltage: ±1%
Low current consumption: 1.6µA (Typ.)
Operating temperature range: -40°C to +75°C
●Package
SSOP5 2.90mm x 2.80mm x 1.15mm
●Applications
All electronic devices that use micro controllers and
logic circuits
VDDV
RESET
●Pin Descriptions
CPU
Micro-controller
GND
PIN No. Symbol Function
1 N.C. Unconnected Terminal
2 SUB Substrate *
3 GND GND
4 VOUT Reset Output
5 VDD Power Supply Voltage
*Substrate Pin should be connected with GND
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.
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BD47xx series
z Ordering Information
B D 4 7 1 9 G － T R
Bipolar Reset Detection Voltage Package
Example: 1.9VÆ19 G：SSOP5 TR: Embossed tape and reel
SSOP5
+0.2
−0.1
2.8±0.2
1.6
1.25Max.
1.1±0.05
0.05±0.05
2.9±0.2
5
12
0.95
Datasheet
Packaging and forming specification
°
+
6
°
4
°
+0.05
−0.04
S
−4
+0.05
0.13
−0.03
(Unit : mm)
0.2Min.
4
3
0.42
0.1 S
<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
Reel
1pin
Direction of feed
Order quantity needs to be multiple of the minimum quantity.
∗
●Lineup
Marking
Detection
Voltage
Part Number Marking
Detection
Voltage
Part Number Marking
Detection
Voltage
Part Number
B2 4.6V BD4746 BR 3.6V BD4736 BH 2.6V BD4726
B1 4.5V BD4745 BQ 3.5V BD4735 BG 2.5V BD4725
BZ 4.4V BD4744 BP 3.4V BD4734 BF 2.4V BD4724
BY 4.3V BD4743 B4 3.3V BD4733 BE 2.3V BD4723
BX 4.2V BD4742 BN 3.2V BD4732 BD 2.2V BD4722
BW 4.1V BD4741 BM 3.1V BD4731 BC 2.1V BD4721
BV 4.0V BD4740 BL 3.0V BD4730 BB 2.0V BD4720
BU 3.9V BD4739 BK 2.9V BD4729 BA 1.9V BD4719
BT 3.8V BD4738 BJ 2.8V BD4728
BS 3.7V BD4737 B3 2.7V BD4727
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Datasheet
●Absolute maximum ratings (Ta=25°C)
Parameter Symbol Limit Unit
Power Supply Voltage VDD -0.3 to +10 V
Output Voltage
Power Dissipation
*1 *2
Pd 540 mW
VOUT -0.3 to +10 V
Operation Temperature Range Topt -40 to +75 °C
Ambient Storage Temperature Tstg -55 to +125 °C
*1 When a ROHM standard circuit board (70mm×70mm×1.6mm glass epoxy board) is mounted.
*2 When used at temperatures higher than Ta=25°C, the power is reduced by 5.4mW/°C
●Electrical characteristics (Unless Otherwise Specified Ta=25°C)
Parameter Symbol Condition
Detection Voltage VDET VDD=HÆL RL=4.7k
Temperature Coefficient
Of Detection Voltage
VDET/T RL=4.7kTa=-20~+75°C Designed Guarantee - ±0.01 - %/°C
Min. Typ. Max.
VDET (T)
×0.99
Limit
VDET(T)
VDET(T)
×1.01
Unit
V
Detection Hysteresis Voltage VDET RL=4.7k, VDD＝LÆHÆL 30 50 100 mV
Transfer Delay Time ”H” t
Transfer Delay Time ”L” t
Reset Output Voltage ”L” V
CL=100pF，RL=4.7k *1 - 20 50 µs
PLH
CL=100pF，RL=4.7k *2 - 60 120 µs
PHL
VDD=VDET(min.)-0.05V, RL=4.7k - 0.1 0.4 V
OL
Circuit Current ON Icc1 VDD=VDET(min.)-0.05V, RL=∞ - 1.5 3.0 µA
Circuit Current OFF Icc2 VDD=VDET(typ.)/0.85V, RL=∞ - 1.6 3.2 µA
Operating Voltage Range V
Output Leak Current I
Reset Output Current ”L” I
VDET(T):Standard Detection Voltage（1.9V to 4.6V, 0.1V step）
RL=4.7k，VOL0.4V - 0.65 0.85 V
OPL
VDD=V
leak
Vo=0.4V, VDD=VDET(min.)-0.05V 3.0 15.0 - mA
OL
=10V - - 0.1 µA
OUT
RＬ:Pull-up resistor to be connected between VOUT and power supply.
CL:Capacitor to be connected between VOUT and GND.
*1 tPLH:Vcc=(VDET(typ.)-0.4V)Æ(VDET(typ.)+0.4V)
*2 tPHL:Vcc=(VDET(typ.)+0.4V)Æ(VDET(typ.)-0.4V)
Designed Guarantee.(Outgoing inspection is not done on all products.)
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●Block Diagram
V
DD
5
4
V
Datasheet
OUT
Vref
3
GND
Fig.1 BD47xx series
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