ROHM BU4209FVE Technical data
Voltage Detector IC Series
Low Volt age Free Delay Time Setting
CMOS Volt age Detector IC Series
BU42xx series BU43xx series
Datasheet
●General Description
ROHM CMOS reset IC series with adjustable output
delay is a high-accuracy low current consumption reset
IC series with a built-in delay circuit. The lineup was
established with two output types (Nch open drain and
CMOS output) and detection voltages range from 0.9V to
4.8V in increments of 0.1V, so that the series may be
selected according to the application at hand.
●Features
Free delay time setting by external capacitor
Two output types (Nch open drain and CMOS output)
Ultra-low current consumption
Wide operating temperature range
Very small and low height package
●Ty pical A pplication Circuit
VDD1
VDD2
●Key Specifications
Detection voltage: 0.9V to 4.8V (Typ.)
0.1V steps
High accuracy detection voltage: ±1.0%
Ultra-low current consumption: 0.55µA (Typ.)
Operating temperature range: -40°C to +125°C
●Package
SSOP5: 2.90mm x 2.80mm x 1.15mm
SOP4: 2.00mm x 2.10mm x 0.95mm
VSOF5: 1.60mm x 1.60mm x 0.60mm
●Applications
All electronic devices that use micro controllers and logic
circuits
VDD1
L
CIN
CT
BU42xx
Open Drain Output type
BU42xx series
R
ST
R
CL
(Capacitor for
noise filt ering)
Micro
controller
GND
GND
CIN
CT
BU43xx
CL
(Capacitor for
noise filtering)
CMOS Output type
BU43xx series
●Connection Diagram & Pin Descriptions
SSOP5 SOP4 VSOF5
TOP VIEW TOP VIEW TOP VIEW
N.C. CT
CTVOUT
VDD
3 4
GND
5
4
Marking
VOUT VDD GND
PIN
Symbol Function
No.
Lot. No
PIN
Marking
GND VDD
Symbol Function
No.
1 2
Lot. No
Marking
3 2
1
VOUT SUB CT
PIN
Symbol Function
No.
1 VOUT Reset output 1 GND GND 1 VOUT Reset output
2 VDD Power supply voltage 2 VDD Power supply voltage 2 SUB Substrate*
3 GND GND
3 CT
Capacitor connection
terminal for output
delay time
3 CT
Capacitor connection
terminal for output
delay time
4 N.C. Unconnected terminal 4 VOUT Reset output 4 VDD Power supply voltage
5 CT
Capacitor connection
terminal for output
5 GND GND
delay time
*Connect the substrate to V
RST
Micro
controller
Lot. No
DD
○Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.
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BU42xx series BU43xx series
●Ordering Information
B U 4 2 0 9 G － T R
BU42: Adjustable Delay Time Detection voltage Package
CMOS Reset IC 09 : 0.9V (0.1V step) G: SSOP5 TR: Embossed tape and reel
Open Drain Type
Output Type
48 : 4.8V F: SOP4
FVE: VSOF5
BU43: Adjustable Delay Time
CMOS Reset IC
CMOS Output Type
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
Packaging and forming specification
Datasheet
1pin
●Lineup
Making
SOP4
Detection
voltage
1.25Max.
2.1±0.2
1.05Max.
1.1±0.05
+0.2
0.9±0.050.05±0.05
–0.1
1.25
0.95
0.05±0.05
0.2
2.0±
1.3
43
12
+0.05
0.32
–0.04
Part
Number
0.05
0.42
0.1
0.42
0.1
S
+0.05
–0.04
S
Making
+0.05
−0.04
4
°
0.13
+6
–4
(Unit : mm)
°
°
0.27±0.15
+0.05
–0.03
(Unit : mm)
Detection
voltage
VSOF5
Part
Number
1.2± 0.05
1.6± 0.05
(MAX 1.28 include BURR)
0.6MAX
Making
5
1
Reel
1.6± 0.05
1.0± 0.05
2
0.5
Detection
voltage
Direction of feed
Order quantity needs to be multiple of the minimum quantity.
∗
4
3
0.22± 0.05
0.2MAX
0.13± 0.05
(Unit : mm)
Part
Number
Making
Detection
voltage
ZR 4.8V BU4248 YV 2.8V BU4228 1H 4.8V BU4348 0M 2.8V BU4328
ZQ 4.7V BU4247 YU 2.7V BU4227 1G 4.7V BU4347 0L 2.7V BU4327
ZP 4.6V BU4246 YT 2.6V BU4226 1F 4.6V BU4346 0K 2.6V BU4326
ZN 4.5V BU4245 YS 2.5V BU4225 1E 4.5V BU4345 0J 2.5V BU4325
ZM 4.4V BU4244 YR 2.4V BU4224 1D 4.4V BU4344 0H 2.4V BU4324
ZL 4.3V BU4243 YQ 2.3V BU4223 1C 4.3V BU4343 0G 2.3V BU4323
ZK 4.2V BU4242 YP 2.2V BU4222 1B 4.2V BU4342 0F 2.2V BU4322
ZJ 4.1V BU4241 YN 2.1V BU4221 1A 4.1V BU4341 0E 2.1V BU4321
ZH 4.0V BU4240 YM 2.0V BU4220 0Z 4.0V BU4340 0D 2.0V BU4320
ZG 3.9V BU4239 YL 1.9V BU4219 0Y 3.9V BU4339 0C 1.9V BU4319
ZF 3.8V BU4238 YK 1.8V BU4218 0X 3.8V BU4338 0B 1.8V BU4318
ZE 3.7V BU4237 YJ 1.7V BU4217 0W 3.7V BU4337 0A 1.7V BU4317
ZD 3.6V BU4236 YH 1.6V BU4216 0V 3.6V BU4336 ZZ 1.6V BU4316
ZC 3.5V BU4235 YG 1.5V BU4215 0U 3.5V BU4335 ZY 1.5V BU4315
ZB 3.4V BU4234 YF 1.4V BU4214 0T 3.4V BU4334 ZX 1.4V BU4314
ZA 3.3V BU4233 YE 1.3V BU4213 0S 3.3V BU4333 ZW 1.3V BU4313
YZ 3.2V BU4232 YD 1.2V BU4212 0R 3.2V BU4332 ZV 1.2V BU4312
YY 3.1V BU4231 YC 1.1V BU4211 0Q 3.1V BU4331 ZU 1.1V BU4311
YX 3.0V BU4230 YB 1.0V BU4210 0P 3.0V BU4330 ZT 1.0V BU4310
YW 2.9V BU4229 YA 0.9V BU4209 0N 2.9V BU4329 ZS 0.9V BU4309
Part
Number
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BU42xx series BU43xx series
●Absolute Maximum Ratings (Ta=25°C)
Parameter Symbol Limit Unit
Power Supply Voltage VDD -0.3 to +7 V
Output Voltage
Power
Dissipation
Nch Open Drain Output GND-0.3 to +7
CMOS Output
SSOP5
SOP4
VSOF5
*1*4
540
*2*4
400
*3*4
VOUT
Pd
GND-0.3 to VDD+0.3
210
Operation Temperature Range Topt -40 to +125 °C
Ambient Storage Temperature Tstg -55 to +125 °C
*1 When used at temperatures higher than Ta=25°C, the power is reduced by 5.4mW per 1°C above 25°C.
*2 When used at temperatures higher than Ta=25°C, the power is reduced by 4.0mW per 1°C above 25°C.
*3 When used at temperatures higher than Ta=25°C, the power is reduced by 2.1mW per 1°C above 25°C.
*4 When a ROHM standard circuit board (70mm×70mm×1.6mm, glass epoxy board)is mounted.
●Electrical Characteristics (Unless Otherwise Specified Ta=-25 to 125°C)
Parameter Symbol Condition
Detection Voltage V
VDD=HÆL, Ta=25°C, RL=470kΩ
DET
Circuit Current when ON IDD1 VDD=VDET-0.2V
Circuit Current when OFF IDD2 VDD=VDET+2.0V
Operating Voltage Range V
VOL≤0.4V, Ta=25~125°C, RL=470kΩ 0.70 - -
OPL
VOL≤0.4V, Ta=-40~25°C, RL=470kΩ 0.90 - -
‘High’ Output Current (Pch) IOH VDS=0.5V VDD=6.0V V
V
=0.9 to 1.3V - 0.15 0.88
DET
V
=1.4 TO 2.1V - 0.20 1.05
DET
V
=2.2 TO 2.7V - 0.25 1.23
DET
V
=2.8 to 3.3V - 0.30 1.40
DET
V
=3.4 to 4.2V - 0.35 1.58
DET
V
=4.3 to 4.8V - 0.40 1.75
DET
V
=0.9 TO 1.3V - 0.30 1.40
DET
V
=1.4 TO 2.1V - 0.35 1.58
DET
V
=2.2 to 2.7V - 0.40 1.75
DET
V
=2.8 to 3.3V - 0.45 1.93
DET
V
=3.4 to 4.2V - 0.50 2.10
DET
V
=4.3 to 4.8V - 0.55 2.28
DET
=4.0 to 4.8V 2.0 4.0 - mA
DET
Min. Typ. Max.
(T)
V
DET
×0.99
VDS=0.05V VDD=0.85V 20 100 - µA
‘Low’ Output Current (Nch) IOL
Leak Current when OFF I
‘High’ Output Current (Pch) IOH
CT pin Threshold Voltage V
Output Delay Resistance RCT VDD=VDET×1.1 VCT=0.5V Ta=25°C
CT pin Output Current ICT
Detection Voltage
Temperature coefficient
V
DET
Hysteresis Voltage ∆VDET
VDS=0.5V VDD=1.5V VDET=1.7 to 4.8V 1.0 3.3 V
DS=0.5V VDD=2.4V VDET=2.7 to 4.8V 3.6 6.5 -
VDD=VDS=7V Ta=-40~85°C - 0 0.1
leak
VDD=VDS=7V Ta=85~125°C - 0 1
VDS=0.5V VDD=4.8V VDET=0.9 to 3.9V 1.7 3.4 VDS=0.5V VDD=6.0V VDET=4.0 to 4.8V 2.0 4.0 -
VDD=VDET×1.1, VDET=0.9 to 2.5V Ta=25°C
L=470kΩ
R
CTH
VDD=VDET×1.1, VDET=2.6 to 4.8V Ta=25°C
L=470kΩ
R
V
DD
×0.35
V
DD
×0.40
*1
9 10 11 MΩ
VCT=0.1V VDD=0.85V 5 40 V
CT=0.5V VDD=1.5V VDET=1.7 to 4.8V 200 400 -
/∆T Ta=-40°C ~125°C - ±30 - ppm/°C
V
DD=LÆHÆL
V
Ta=-40~125°C
R
L=470kΩ
VDET≤1.0V
DET≥1.1V
V
DET
×0.03
V
DET
×0.03
*1: Designed guarantee. (Outgoing inspection is not done all products.)
V
(T) : Standard Detection Voltage(0.9V to 4.8V, 0.1V step)
DET
RL: Pull-up resistor to be connected between VOUT and power supply.
mW
Limit
V
DET
VDD
×0.45
VDD
×0.50
V
DET
×0.05
V
DET
×0.05
V
(T)
Datasheet
Unit
(T)
V
DET
×1.01
VDD
×0.55
VDD
×0.60
V
DET
×0.08
V
DET
×0.07
V
µA
µA
V
mA
µA
mA
V
µA
V
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TSZ02201-0R7R0G300050-1-2
20.DEC.2011 Rev.002
BU42xx series BU43xx series
●Block Diagrams
Vref
Vref
VDD
VDD
GND
Fig.1 BU42xx Series
GND
Fig.2 BU43xx Series
Datasheet
OUT
V
CT
OUT
V
CT
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TSZ02201-0R7R0G300050-1-2
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