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2011.03 - Rev.D

Voltage Detector ICs

Low Voltage Standard

CMOS Voltage Detector ICs

BU48□□G Series, BU48□□F Series, BU48□□FVE Series,

BU49□□G Series, BU49□□F Series, BU49□□FVE Series

●Description

ROHM standard CMOS reset IC series is a high-accuracy low current consumption reset IC series. The lineup was

established with two output types (Nch open drain and CMOS output) and detection voltage 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

1) Detection voltage from 0.9V to 4.8V in 0.1V increments

2) Highly accurate detection voltage: ±1.0%

3) Ultra-low current consumption

4) Nch open drain output (BU48□□G/F/FVE)and CMOS output (BU49□□G/F/FVE)

5) Small surface package SSOP5: BU48□□G, BU49□□G

SOP4: BU48□□F, B U 4 9 □□F

VSOF5: BU48□□FVE, BU49□□FVE

●Applications

All electronics devices that use microcontrollers and logic circuits.

●Selection Guide

●Lineup

Making

Detection

voltage

Part

Number

Making

Detection

voltage

Part

Number

Making

Detection

voltage

Part

Number

Making

Detection

voltage

Part

Number

JR 4.8V BU4848 HV 2.8V BU4828 LH 4.8V BU4948 KM 2.8V BU4928

JQ 4.7V BU4847 HU 2.7V BU4827 LG 4.7V BU4947 KL 2.7V BU4927

JP 4.6V BU4846 HT 2.6V BU4826 LF 4.6V BU4946 KK 2.6V BU4926

JN 4.5V BU4845 HS 2.5V BU4825 LE 4.5V BU4945 KJ 2.5V BU4925

JM 4.4V BU4844 HR 2.4V BU4824 LD 4.4V BU4944 KH 2.4V BU4924

JL 4.3V BU4843 HQ 2.3V BU4823 LC 4.3V BU4943 KG 2.3V BU4923

JK 4.2V BU4842 HP 2.2V BU4822 LB 4.2V BU4942 KF 2.2V BU4922

JJ 4.1V BU4841 HN 2.1V BU4821 LA 4.1V BU4941 KE 2.1V BU4921

JH 4.0V BU4840 HM 2.0V BU4820 KZ 4.0V BU4940 KD 2.0V BU4920

JG 3.9V BU4839 HL 1.9V BU4819 KY 3.9V BU4939 KC 1.9V BU4919

JF 3.8V BU4838 HK 1.8V BU4818 KX 3.8V BU4938 KB 1.8V BU4918

JE 3.7V BU4837 HJ 1.7V BU4817 KW 3.7V BU4937 KA 1.7V BU4917

JD 3.6V BU4836 HH 1.6V BU4816 KV 3.6V BU4936 JZ 1.6V BU4916

JO 3.5V BU4835 HG 1.5V BU4815 KU 3.5V BU4935 JY 1.5V BU4915

JB 3.4V BU4834 HF 1.4V BU4814 KT 3.4V BU4934 JX 1.4V BU4914

JA 3.3V BU4833 HE 1.3V BU4813 KS 3.3V BU4933 JW 1.3V BU4913

HZ 3.2V BU4832 HD 1.2V BU4812 KR 3.2V BU4932 JV 1.2V BU4912

HY 3.1V BU4831 HC 1.1V BU4811 KQ 3.1V BU4931 JU 1.1V BU4911

HX 3.0V BU4830 HB 1.0V BU4810 KP 3.0V BU4930 JT 1.0V BU4910

HW 2.9V BU4829 HA 0.9V BU4809 KN 2.9V BU4929 JS 0.9V BU4909

No. Specifications Description

① Output Circuit Format 8:Open Drain Output, 9:CMOS Output

② Detection Voltage

Example VDET: Represented as 0.1V steps

in the range from 0.9V to 4.8V

(Displayed as 0.9 in the case of 0.9V)

③ Package

G:SSOP5(SMP5C2)/ F :SOP4/

FVE:VSOF5(EMP5)

No.11006EDT01

Part Number : BU4

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Summary of content (9 pages)

PAGE 1
Voltage Detector ICs Low Voltage Standard CMOS Voltage Detector ICs BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series No.11006EDT01 ●Description ROHM standard CMOS reset IC series is a high-accuracy low current consumption reset IC series. The lineup was established with two output types (Nch open drain and CMOS output) and detection voltage range from 0.9V to 4.8V in increments of 0.
PAGE 2
BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series ●Absolute maximum ratings (Ta=25℃) Parameter Power Supply Voltage Nch Open Drain Output Output Voltage CMOS Output *1*4 SSOP5 Power *2*4 SOP4 Dissipation *3*4 VSOF5 Operating Temperature Ambient Storage Temperature *1 *2 *3 *4 Technical Note Symbol VDD-GND VOUT Pd Topr Tstg Limits -0.3 ~ +7 GND-0.3 ~ +7 GND-0.3 ~ VDD+0.
PAGE 3
BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Electrical characteristics (Unless Otherwise Specified Ta=-25 to 125℃) Parameter Symbol Circuit Current when ON IDD1 Circuit Current when OFF IDD2 Operating Voltage Range VOPL ‘Low’ Output Current (Nch) IOL ‘High’ Output Current (Pch) (only BU49□□G/F/FVE) IOH Output Leak Current when OFF (only BU48□□G/F/FVE) Ileak Condition VDET =0.9-1.3V VDET =1.4-2.1V VDET =2.2-2.
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BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Reference Data (Unless specified otherwise, Ta=25℃) 0.5 0.4 0.3 0.2 0.1 0.0 0 1 2 3 4 5 6 7 4 3 VDD =6.0V 15 2 1 0 0.0 0.5 1.0 1.5 VDD =4.8V 10 VDD =1.2V 2.0 5 0 2.5 0 1 2 3 4 5 6 DRAIN-SOURCE VOLTAGE ： VDS[V] Fig.3 Circuit Current Fig.4 “LOW” Output Current Fig.5 “High” Output Current 1.0 3 2 1 0 1 2 3 4 5 6 0.6 0.4 0.2 0.0 0.
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BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Reference Data Examples of Output rising value(TPLH)and Output falling value(TPHL) Part Number TPLH[µs] TPHL[µs] BU4845G/F/FVE 23.3 275.9 BU4945G/F/FVE 3.5 354.3 VDD=4.3V5.1V VDD=5.1V4.3V * This data is for reference only. This figure will vary with the application, so please confirm actual operation conditions before use. ●Explanation of Operation For both the open drain type(Fig.
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BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Circuit Applications 1) Examples of a common power supply detection reset circuit VDD1 VDD2 Application examples of BU48□□G/F/FVE series (Open Drain output type) and BU49□□G/F/FVE series (CMOS output type) are shown below. RL Microcontroller RST BU48□□□ CIN CL (Capac it or for noise filtering) Fig.
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BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Notes for use 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.
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BU48□□G Series, BU48□□F Series, BU48□□FVE Series, BU49□□G Series, BU49□□F Series, BU49□□FVE Series Technical Note ●Ordering part number B U 4 8 0 BU48: Standard CMOS reset IC Open drain type BU49: Standard CMOS reset IC CMOS Output type 9 F Detection voltage 09 : 0.9V (0.1V step) 48 : 4.8V － Package G: SSOP5 F: SOP4 FVE: VSOF5 T R Packaging and forming specification TR: Embossed tape and reel SSOP5 5 4 1 2 0.2Min. +0.2 1.6 −0.1 2.8±0.2 +6° 4° −4° 2.9±0.
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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.