HT70XX Voltage Detector Features · Low power consumption · Built-in hysteresis characteristic · Low temperature coefficient · TO-92 & SOT-89 package · Built-in high-stability reference source Applications · Battery checkers · Microcomputer reset · Level selectors · Battery memory backup · Power failure detectors · Non-volatile RAM signal storage protectors General Description Although designed primarily as fixed voltage detectors, these devices can be used with external components to detect user specified threshold voltages (NMOS open drain type only). The HT70XX series is a set of three-terminal low power voltage detectors implemented in CMOS technology. Each voltage detector in the series detects a particular fixed voltage ranging from 2.2V to 7V. The voltage detectors consist of a high-precision and low power consumption standard voltage source, a comparator, hysteresis circuit, and an output driver. CMOS technology ensures low power consumption. Selection Table Part No. Detectable Voltage Hysteresis Width Tolerance HT7022A 2.2V 0.11V ±5% HT7024A 2.4V 0.12V ±5% HT7027A 2.7V 0.135V ±5% HT7033A 3.3V 0.165V ±5% HT7039A 3.9V 0.195V ±5% HT7044A 4.4V 0.22V ±5% HT7050A 5.0V 0.25V ±5% HT7070A 7.0V 0.35V ±5% Note: The output type selection codes are: NMOS open drain normal open, active low For example: The HT7070A is a 7.0V, NMOS open drain active low output Output type selection table VDD Type VOUT VDD>VDET(+) VDD£VDET(-) Hi-Z VSS A Rev. 1.60 1 January 14, 2003 HT70XX Block Diagram N channel open drain output (normal open; active low) VOUT VDD VREF GND A type VOUT VDET VIN VHYS Pin Assignment T O -9 2 S O T -8 9 H T 7 0 X X O U T V D D F r o n t V ie w V S S B o tto m V ie w O U T Rev. 1.60 V D D V S S 2 January 14, 2003 HT70XX Pad Assignment Pad Coordinates HT70XX (except HT7022A) HT70XX (except HT7022A) (0 ,0 ) 2 V O U T V IN 3 Pad No. X Y 1 -483.30 -379.50 2 -234.60 -399.50 3 443.90 -386.00 Unit: mm HT7022A only G N D 1 Unit: mm Chip size: 1317 ´ 1158 (mm)2 Pad No. X Y 1 -434.34 394.97 2 120.65 461.01 3 774.70 412.75 * The IC substrate should be connected to VDD in the PCB layout artwork. HT7022A only V D D V S S O U T 1 2 3 (0 ,0 ) Chip size: 2032 ´ 1321 (mm)2 * The IC substrate should be connected to VDD in the PCB layout artwork. Absolute Maximum Ratings Supply Voltage, except HT7022A ..................................................................................................VSS-0.3V to VSS+26V Supply Voltage, HT7022A only ....................................................................................................................-0.3V to 13V Output Voltage ...........................VSS-0.3V to VDD+0.3V Output Current......................................................50mA Storage Temperature ............................-50°C to 125°C Power Consumption ..........................................200mW Operating Temperature ...............................0°C to 70°C Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maximum Ratings² may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev. 1.60 3 January 14, 2003 HT70XX Electrical Characteristics HT7022A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 2.09 2.2 2.31 V ¾ ¾ 2.132 2.31 2.541 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 3.2V ¾ 1.8 4 mA VDD Operating Voltage ¾ 1.6 ¾ 12 V IOL Output Sink Current 2V VOUT=0.2V 0.5 1 ¾ mA DVDET DTa Temperature Coefficient ¾ 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET No load ¾ HT7024A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 2.28 2.4 2.52 V ¾ ¾ 2.325 2.52 2.772 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ 1.5 ¾ 24 V IOL Output Sink Current 2V VOUT=0.2V 0.5 1 ¾ mA DVDET DTa Temperature Coefficient ¾ 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET No load ¾ HT7027A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 2.565 2.7 2.835 V ¾ ¾ 2.616 2.835 3.118 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET IOL Output Sink Current DVDET DTa Temperature Coefficient Rev. 1.60 No load 1.5 ¾ 24 V 2V VOUT=0.2V ¾ 0.5 1 ¾ mA ¾ 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C 4 January 14, 2003 HT70XX HT7033A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 3.135 3.3 3.465 V ¾ ¾ 3.197 3.465 3.811 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ 1.5 ¾ 24 V IOL Output Sink Current VOUT=0.25V 1.2 2.5 ¾ mA DVDET DTa Temperature Coefficient 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET No load ¾ 2.5V ¾ HT7039A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 3.705 3.9 4.095 V ¾ ¾ 3.779 4.095 4.504 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ 1.5 ¾ 24 V IOL Output Sink Current VOUT=0.25V 1.2 2.5 ¾ mA DVDET DTa Temperature Coefficient 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET No load ¾ 2.5V ¾ HT7044A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 4.18 4.4 4.62 V ¾ ¾ 4.263 4.62 5.082 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET IOL Output Sink Current DVDET DTa Temperature Coefficient Rev. 1.60 3.6V ¾ No load 1.5 ¾ 24 V VOUT=0.36V ¾ 3 6 ¾ mA 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C 5 January 14, 2003 HT70XX HT7050A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 4.75 5 5.25 V ¾ ¾ 4.845 5.25 5.775 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ 2.1 ¾ 24 V IOL Output Sink Current VOUT=0.36V 3 6 ¾ mA DVDET DTa Temperature Coefficient 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET 3.6V ¾ No load ¾ HT7070A Symbol Ta=25°C Parameter Test Conditions Min. Typ. Max. Unit ¾ 6.65 7 7.35 V ¾ ¾ 6.783 7.35 8.085 V Hysteresis Width ¾ ¾ 0.02 VDET 0.05 VDET 0.1 VDET V IDD Operating Current 8V ¾ 4 7 mA VDD Operating Voltage ¾ ¾ 2.1 ¾ 24 V IOL Output Sink Current 5V VOUT=0.5V 5 10 ¾ mA DVDET DTa Temperature Coefficient ¾ 0°C<Ta<70°C ¾ ±0.9 ¾ mV/°C VDD Conditions Hi®Lo Detectable Voltage ¾ Lo®Hi Detectable Voltage VHYS VDET No load Functional Description The HT70XX series is a set of voltage detectors equipped with a high stability voltage reference which is connected to the negative input of a comparator¾ denoted as VREF in the following figure for NMOS output voltage detector. If VDD falls below the minimum operating voltage, the output becomes undefined. When VDD goes from low to VDD ´ RB / (RA+RB) > VREF, the comparator output and VOUT goes high. The detectable voltage is defined as: When the voltage drop to the positive input of the comparator (i,e,VB) is higher than VREF, VOUT goes high, M1 turns off, and VB is expressed as VBH=VDD ´ (RB+RC) / (RA+RB+RC). If VDD is decreased so that VB falls to a value less than VREF, the comparator output inverts from high to low, VOUT goes low, VC is high, M1 turns on, RC is bypassed, and V B becomes: VBL=VDD´RB / (RA+RB), which is less than VBH. By so doing, the comparator output will stay low to prevent the circuit from oscillating when VB » VREF. Rev. 1.60 VDET (-) = RA + RB + RC ´ VREF RB + RC The release voltage is defined as: VDET (+) = 6 RA + RB ´ VREF RB January 14, 2003 HT70XX V The hysteresis width is: VHYS = VDET (+) - VDET (-) R D D A C o m p a ra to r The figure demonstrates the NMOS output type with positive output polarity (VOUT is normally open, active low). The HT70XX series also supplies options for other output types with active high outputs. Application circuits shown are examples of positive output polarity (normally open, active low) unless otherwise specified. V V R E F R R L V B C V O U T M N B M 1 R C V S S NMOS output voltage detector (HT70XXA) Application Circuits Microcomputer reset circuit Power-on reset circuit Normally a reset circuit is required to protect the microcomputer system from malfunctions due to power line interruptions. The following examples show how different output configurations perform a reset function in various systems. With several external components, the NMOS open drain type of the HT70XX series can be used to perform a power-on reset function as shown: V IN R · NMOS open drain output application for separate D power supply V D D 1 V V H T 7 0 X X A V D D 2 C O U T R E S E T M ic r o c o m p u te r V V O U T V H T 7 0 4 4 A V S S V V D D O U T S S D D S S · NMOS open drain output application with R-C delay V D D R H T 7 0 X X A V O U T M ic r o c o m p u te r t V O U T C V S S t Rev. 1.60 7 January 14, 2003 HT70XX · Varying the detectable voltage with a diode 5V power line monitoring circuit V Generally, a minimum operating voltage of 4.5V is guaranteed in a 5V power line system. The HT7044A is recommended for use as 5V power line monitoring circuit. IN V f1 V f2 · 5V power line monitor with power-on reset V 5 V P o w e r lin e V R D O U T H T 7 0 X X A V V D D C V S S S S Detectable Voltage = Vf1+Vf2+VDET V O U T Malfunction analysis H T 7 0 4 4 A V D D V S S The following circuit demonstrates the way a circuit analyzes malfunctions by monitoring the variation or spike noise of power supply voltage. S S · with 5V voltage regulator V D D 5 V V o lta g e r e g u la to r V H T 7 1 5 0 IN V 5 V H T 7 0 X X A G N D V V D D V O U T V V S S The following circuit shows a charged monitor for protection against battery deterioration by overcharging. When the voltage of the battery is higher than the set detectable voltage, the transistor turns on to bypass the charge current, protecting the battery from overcharging. S S Change of detectable voltage If the required voltage is not found in the standard product selection table, it is possible to change it by using external resistance dividers or diodes. V · Varying the detectable voltage with a resistance di- vider S o la r C e ll IN R R B D D O U T B A T T T r V D D V V V A V S S Charge monitoring circuit H T 7 0 4 4 A V O U T S S L o a d H T 7 0 X X A O U T H T 7 0 X X A S S V S S RA + RB ´ VDET RB RA + RB Hysteresis width = ´ VHYS RB Detectable voltage = Rev. 1.60 8 January 14, 2003 HT70XX Level selector The following diagram illustrates a logic level selector. V D D V S S O U T V O U T V O U T H T 7 0 3 9 A H T 7 0 5 0 A V D E T 2 V D E T 1 V D D 5 .0 V V D E T 1 3 .9 V V D E T 2 t O U T t Rev. 1.60 9 January 14, 2003 HT70XX Package Information 3-pin TO-92 outline dimensions A B D C E F G H Symbol A Rev. 1.60 Dimensions in mil Min. Nom. Max. 170 ¾ 200 B 170 ¾ 200 C 500 ¾ ¾ D 11 ¾ 20 E 90 ¾ 110 F 45 ¾ 55 G 45 ¾ 65 H 130 ¾ 160 I 8 ¾ 18 a 4° ¾ 6° 10 January 14, 2003 HT70XX 3-pin SOT-89 outline dimensions I A J B C E D G F Symbol Rev. 1.60 H Dimensions in mil Min. Nom. Max. A 173 ¾ 181 B 64 ¾ 72 C 90 ¾ 102 D 35 ¾ 47 E 155 ¾ 167 F 14 ¾ 19 G 17 ¾ 22 H ¾ 59 ¾ I 55 ¾ 63 J 14 ¾ 17 11 January 14, 2003 HT70XX Product Tape and Reel Specifications TO-92 reel dimensions (Unit: mm) P a c k a g e U p , F la t S id e U p 3 0 P a c k a g e U p , F la t S id e D o w n 4 3 5 8 8 8 3 6 0 Rev. 1.60 12 January 14, 2003 HT70XX SOT-89 reel dimensions D T 2 A C B T 1 SOT-89 Symbol Description Dimensions in mm A Reel Outer Diameter 180±1.0 B Reel Inner Diameter 62±1.5 C Spindle Hole Diameter D Key Slit Width 1.9±0.15 T1 Space Between Flange 12.4+0.2 T2 Reel Thickness Rev. 1.60 12.75+0.15 17-0.4 13 January 14, 2003 HT70XX TO-92 carrier tape dimensions P , h W 2 H 1 H H 0 l1 W 0 t W 1 W F 1 F 2 D 0 P 2 P 0 TO-92 Symbol Note: Description Dimensions in mm I1 Taped Lead Length (2.5) P Component Pitch 12.7±1.0 P0 Perforation Pitch 12.7±0.3 P2 Component to Perforation (Length Direction) 6.35±0.4 F1 Lead Spread 2.5+0.4 -0.1 F2 Lead Spread 2.5+0.4 -0.1 Dh Component Alignment 0±0.1 W Carrier Tape Width 18.0+1.0 -0.5 W0 Hold-down Tape Width 6.0±0.5 W1 Perforation Position 9.0±0.5 W2 Hold-down Tape Position H0 Lead Clinch Height 16.0±0.5 H1 Component Height Less than 24.7 D0 Perforation Diameter 4.0±0.2 t Taped Lead Thickness 0.7±0.2 H Component Base Height 19.0±0.5 (0.5) Thickness less than 0.38±0.05mm~0.5mm P0 Accumulated pitch tolerance: ±1mm/20pitches. ( ) Bracketed figures are for consultation only Rev. 1.60 14 January 14, 2003 HT70XX SOT-89 carrier tape dimensions P 0 D P 1 t E F W C D 1 B 0 P K 0 A 0 SOT-89 Symbol Description Dimensions in mm W Carrier Tape Width 12.0+0.3 -0.1 P Cavity Pitch 8.0±0.1 E Perforation Position 1.75±0.1 F Cavity to Perforation (Width Direction) 5.5±0.05 D Perforation Diameter 1.5+0.1 D1 Cavity Hole Diameter 1.5+0.1 P0 Perforation Pitch 4.0±0.1 P1 Cavity to Perforation (Length Direction) 2.0±0.10 A0 Cavity Length 4.8±0.1 B0 Cavity Width 4.5±0.1 K0 Cavity Depth 1.8±0.1 t Carrier Tape Thickness C Cover Tape Width Rev. 1.60 0.30±0.013 9.3 15 January 14, 2003 HT70XX Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Sales Office) 11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan Tel: 886-2-2782-9635 Fax: 886-2-2782-9636 Fax: 886-2-2782-7128 (International sales hotline) Holtek Semiconductor (Shanghai) Inc. 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor (Hong Kong) Ltd. RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong Tel: 852-2-745-8288 Fax: 852-2-742-8657 Holmate Semiconductor, Inc. 48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2003 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.60 16 January 14, 2003