AME, Inc. µProcessor Supervisory AME8570 n General Description n Functional Block Diagram AME8570 Push-Pull RESET/ RESETB The AME8570 family allows the user to customize the CPU reset function without any external components. The user has serveral choice of reset voltage thresholds, reset time intervals, and output driver configurations, all of which are preset at the factory. These circuits monitor the power supply voltage of µP based systems. When the power supply voltage drops below the voltage threshold a reset is asserted immediately ( within an interval TD1 ). The reset remains asserted after the supply voltage rises above the voltage threshold for a time interval, TD2. The reset output may be either active high ( RESET ) or active low ( RESETB ). The reset output may be configured as either push/pull or open drain. The state of the reset output is guaranteed to be correct only when supply voltage is greater than 1V. IN R1 RESET/ RESETB Delay R2 VREF N1 GND AME8570 Open-Drain RESET/RESETB IN R1 I1 RESET/ RESETB Delay The AME8570 also provide a reset manually by pulling the MRB input to ground. Space saving SC-70 package and micropower quiescent current ( < 5.0µA ) make this family a natural for portable battery powered equipment. P1 I1 R2 VREF N1 GND n Features AME8570 Push-Pull RESET/ RESETB with MRB MRB l Small Packages : SC-70, SOT-23 IN l Tight Voltage Threshold Tolerance : R1 ± 1.50% l Wide Temperature Range : -40OC to 85OC RESET/ RESETB Delay l Low Quiescent Current < 5.0 µA R2 l Manual Reset Input Option l All AME's Lead Free Products Meet RoHS P1 I1 VREF N1 GND Standards AME8570 Open-Drain RESET/ RESETB with MRB n Applications MRB IN l Portable Electronics R1 l Power Supplies I1 l Computer Peripherals l Data Acquisition Systems R2 l Applications using CPUs l Consumer Electronics 1 RESET/ RESETB Delay VREF N1 GND Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Typical Operating Circuit VIN R*PULL-UP VIN µP PUSH BUTTON RESET / RESETB SWITCH MRB GND RESET INPUT GND Note: * External pull-up resistor is required if open-drain output is used. 10KΩ is recommended. n Pin Configuration SC-70-3 Top View SOT-23 Top View AME8570AEIT 3 AME8570AEET 3 1. GND 1. GND 2. RESET/RESETB 2. RESET/RESETB AME8570 1 3. IN AME8570 1 2 * Die Attach: Non-Conductive Epoxy 3. IN 2 * Die Attach: Non-Conductive Epoxy SC-70-4 Top View 4 3 AME8570AEIU 1. GND 2. RESET/RESETB AME8570 3. MRB 4. IN 1 2 * Die Attach: Non-Conductive Epoxy 2 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Pin Description AME8570AEIT / AME8570AEET Pin Number Pin Name 1 GND 2 RESET/RESETB This pin can be ordered as RESET or RESETB. Reset is active high. RESETB is active low. It is also available with an open-drain or push-pull output. IN Positive power supply. A reset is asserted after this voltage drops below a predetermined level. After VIN rises above that level the reset output remains asserted until the end of the reset timeout period. Pin Number Pin Name Pin Description 1 GND 2 RESET/RESETB 3 Pin Description Ground AME8570AEIU 3 3 MRB 4 IN Ground This pin can be ordered as RESET or RESETB. Reset is active high. RESETB is active low. It is also available with an open-drain or push-pull output. Manual RESET. Active low. Pulling this pin low forces a reset. After a low to high transition reset, remains asserted for exactly one reset timeout period. This pin is internally pulled high. The pin is floating or tied to VIN , if it is unused. Positive power supply. A reset is asserted after this voltage drops below a predetermined level. After VIN rises above that level the reset output remains asserted until the end of the reset timeout period. Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Ordering Information AME8570 x x x x x x xx x Special Feature VIN Threshold Voltage (VTH) Reset Time (TD2NOM) Output Driver Option Number of Pins Package Type Operating Ambient Temperature Range Pin Configuration Pin Configuration Operating Ambient Temperature Range E: -40OC to 85OC 1. GND (SOT-23 ) 2. RESET/ (SC-70 -3) RESETB 3. IN A A (SC-70 -4) Package Type E: SOT-2X I: SC-70 Number of Pins T: 3 U: 4 Output Options A: B: C: D: RESETB/PP RESETB/OD RESET/PP RESET/OD Reset Time (T D2NOM) VIN Threshold Voltage (VTH) Special Feature F: 210ms 23: V TH=2.32V 26: V TH=2.63V 29: V TH=2.93V 31: V TH=3.08V 46: V TH=4.63V Z: Lead free 1. GND 2. RESET/ RESETB 3. MRB 4. IN (RESET=Active High) (RESETB=Active Low) (PP=Push-pull out) (OD=Open-Drain 4 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Ordering Information Part Number Marking* Output Voltage Package Operating Ambient Temperature Range AME8570AEETAF23Z BJOww 2.32V SOT-23 -40oC to 85oC AME8570AEITAF23Z BJPw 2.32V SC-70-3 -40oC to 85oC AME8570AEIUAF23Z BJQw 2.32V SC-70-4 -40oC to 85oC AME8570AEETAF26Z BJRww 2.63V SOT-23 -40oC to 85oC AME8570AEITAF26Z BJSw 2.63V SC-70-3 -40oC to 85oC AME8570AEIUAF26Z BJTw 2.63V SC-70-4 -40oC to 85oC AME8570AEETAF29Z BJUww 2.93V SOT-23 -40oC to 85oC AME8570AEITAF29Z BJVw 2.93V SC-70-3 -40oC to 85oC AME8570AEIUAF29Z BJWw 2.93V SC-70-4 -40oC to 85oC AME8570AEETCF29Z BJXww 2.93V SOT-23 -40oC to 85oC AME8570AEITCF29Z BJYw 2.93V SC-70-3 -40oC to 85oC AME8570AEIUCF29Z BJZw 2.93V SC-70-4 -40oC to 85oC AME8570AEETAF31Z BKAww 3.08V SOT-23 -40oC to 85oC AME8570AEITAF31Z BKBw 3.08V SC-70-3 -40oC to 85oC AME8570AEIUAF31Z BKCw 3.08V SC-70-4 -40oC to 85oC AME8570AEETBF31Z BKDww 3.08V SOT-23 -40oC to 85oC AME8570AEITBF31Z BKEw 3.08V SC-70-3 -40oC to 85oC AME8570AEIUBF31Z BKFw 3.08V SC-70-4 -40oC to 85oC AME8570AEETAF46Z BKGww 4.63V SOT-23 -40oC to 85oC AME8570AEITAF46Z BKHw 4.63V SC-70-3 -40oC to 85oC AME8570AEIUAF46Z BKIw 4.63V SC-70-4 -40oC to 85oC AME8570AEETCF46Z BKJww 4.63V SOT-23 -40oC to 85oC AME8570AEITCF46Z BKKw 4.63V SC-70-3 -40oC to 85oC AME8570AEIUCF46Z BKLw 4.63V SC-70-4 -40oC to 85oC Note: ww & w represents the date code and pls refer to the Date Code Rule on Package Dimension. * A line on top of the first letter represents lead free plating such as BJOww. Pls consult AME sales office or authorized Rep./Distributor for the availability of output voltage or package type. 5 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Absolute Maximum Ratings Parameter Maximum Unit 6 V 20 mA Supply Voltage Input Current, VIN Output Current, RESET, RESETB B* ESD Classification Note: Caution: Stress above the listed in absolute maximum ratings may cause permanent damage to the device. * HBM B: 2000V ~ 3999V n Recommended Operating conditions Parameter Symbol Rating Unit Ambient Temperature Range TA - 40 to 85 Junction Temperature Range TJ - 40 to 125 Storage Temperature Range TSTG - 65 to 150 O C n Thermal Information Parameter Thermal Resistance* (Junction to Case) Package Die Attach Symbol Maximum θJC SOT-23 Unit 140 o C/W Thermal Resistance (Junction to Ambient) SOT-23 Internal Power Dissipation SOT-23 Non-Conductive Epoxy Solder Iron (10 Sec) ** θJA 280 PD 400 350 mW o C * Measure θJC on center of molding compound if IC has no tab. ** MIL-STD-202G 210F 6 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Electrical Specifications TA = 25OC unless otherwise noted. Parameter VIN Range Symbol Test Condition VRANGE TA = -40oC to 85oC o Supply Current RESET Threshold IIN 1 Max Units 5.5 V 5 10 µA VTH -1.5% VTH +1.5% TA = -40 C to 85 C VTH -2% VTH +2% VRelease - VTH 10 VTH VHYST Typ o VIN = VTH x1.10, TA = -40 C to 85 C MRB unconnected o Hysteresis Range Min o 30 60 V mV ISOURCE = 0.5mA, RESETB Output Voltage High VIN > VTH (MAX) VIN > 1.8V ISOURCE = 0.15mA, 1.8V >= VIN > 1.0V ISOURCE = 0.5mA, VOH 0.8V IN V VIN > 1.8V ISOURCE = 0.15mA, RESET Output Voltage High VIN < VTH (MIN) RESETB Output Voltage Low VIN < VTH (MIN) ISINK = 1.2mA, VIN > VTH (MAX) TJ = -40oC to 85oC 1.8V >= VIN > 1.0V RESET Output Voltage Low VOL VIN to RESET Delay TD1 RESET Timeout Period TD2 MRB Input Threshold MRB Pulse Width MRB IL MRB IH 0.5 VIN = VTH -100mV; TA = -40oC to 85oC TA = -40oC to 85oC Version F VIN = VTH x 1.2 µS 40 140 210 V 600 0.7 0.8V IN mS V µS 1 MRB Noise Immunity (pulse width with no reset) 100 nS MRB to RESET Delay 500 nS MRB Pull Up Resistance 7 80 120 KΩ Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Timing Diagram VRelease VTH VIN TD2 50% TD1 50% TD1 50% RESET TD2 50% RESETB n Applications Information Supply Transients These devices have a certain immunity to fast negative going transients. In the following pages the graph titled "Glitch Rejection" indicates the maximum allowable glitch amplitude and duration to avoid triggering an unintended reset. As shown in the graph shorter transients can have larger amplitudes without triggering resets. Glitch Rejection Reset Time vs. Temperature 600 140 550 500 Reset Time (ms) Glitch Duration (µS) 120 100 80 60 40 400 350 300 250 20 200 0 0.01 0.1 Glitch Amplitude (V) 8 450 1 150 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 Temperature (oC) Rev. A.01 AME, Inc. AME8570 µProcessor Supervisory n Detailed Description The AME8570 are designed to interface with the reset input of a microprocessor and to prevent code-execution errors due to power up, power down, and other power supply errors. Reset Output Each output pin in the family can be configured to be either push-pull or open-drain. In addition each output may be either active high or active low. Active high reset outputs are denoted as RESET. Active low reset outputs are denoted as RESETB. The selection guide on this data sheet shows all possible combinations of output driver configuration. A reset will be asserted if any of two things happen: 1) VIN drops below the threshold (VTH) 2) The MRB pin is pulled low. The reset will remain asserted for the prescribed reset interval after: 1) VIN rises above the threshold (VTH) 2) MRB goes high Manual Reset Input The AME8570 feature a manual reset feature (MRB). A logic low on the MRB pin asserts a reset. The reset remains asserted as long as the MRB pin remains low. After the MRB pin transitions to a high state the reset remains asserted for the prescribed reset interval (TD2). The MRB pin is internally pulled up to VIN by a 100K resistor. It is internally debounced to reject switching transients. The MRB pin is ESD protected by diodes connected to VIN and GND. So the MRB pin should never be driven higher than VIN or lower than GND. Glitch Rejection The AME8570 family will reject negative going transients on the VIN line to some extent. The smaller the duration of the transient the larger its amplitude may be without triggering a reset. The "Glitch Rejection" chart in the graphs section of this datasheet shows the relation between glitch amplitude and allowable glitch duration to avoid unintended resets. Accurate Output State at Low VIN With VIN voltage on the order of the MOS transistor threshold (<1.0V) the outputs of the AME8570 may become undefined. For parts with active low output (RESETB) a resistor placed between RESETB and GND on the order of 100K will ensure that the RESETB output stays low when VIN is lower than the threshold voltage of the part. In a like manner a resistor on the order of 100K when placed between RESET and VIN will ensure parts with active high output (RESET) will remain high when VIN is lower than the threshold voltage of the part. 9 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 Reset VTH vs. Temperature IIN vs. Temperature 2.70 2.69 3.0 2.68 AME8570AEETAF26 Reset Vth (V) Supply Current @ 5V (µA) 3.5 2.5 2.0 AME8570AEETAF26 2.67 2.66 2.65 2.64 2.63 2.62 1.5 2.61 1.0 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 2.60 -45 -35 -25 -15 -5 95 105 115 Temperature (oC) Temperature (oC) Threshold Hysteresis vs. Temperature IIN vs. VIN 2.8 0.030 2.4 0.025 85oC 1.6 Hysteresis (V) IIN (µA) 2.0 0o C 1.2 -40oC 0.8 0.020 0.015 0.010 0.005 0.4 0.0 0.0 5 15 25 35 45 55 65 75 85 95 105 115 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 VIN (V) 0.000 -40 -20 0 20 40 60 80 Temperature (oC) Reset VOL vs. Temperature 0.034 Reset VOL @ 0.8mA (V) 0.032 0.030 0.028 AME8570AEETAF26 0.026 0.024 0.022 0.020 0.018 0.016 0.014 0.012 0.010 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 75 85 95 105 115 Temperature (oC) 10 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Date Code Rule For SOT-23 Package Only Marking Date Code Year A A A W W xxx0 A A A W W xxx1 A A A W W xxx2 A A A W W xxx3 A A A W W xxx4 A A A W W xxx5 A A A W W xxx6 A A A W W xxx7 A A A W W xxx8 A A A W W xxx9 Date Code Year For SC-70 Package Only Marking 11 w: Work Week Code A A A W xxx0 A: 01&02 K: 21&22 U: 41&42 A A A W xxx1 B: 03&04 L: 23&24 V: 43&44 A A A W xxx2 C: 05&06 M: 25&26 W: 45&46 A A A W xxx3 D: 07&08 N: 27&28 X: 47&48 A A A W xxx4 E: 09&10 O: 29&30 Y: 49&50 A A A W xxx5 F: 11&12 P: 31&32 Z: 51&52 A A A W xxx6 G: 13&14 Q: 33&34 A A A W xxx7 H: 15&16 R: 35&36 A A A W xxx8 I: 17&18 S: 37&38 A A A W xxx9 J: 19&20 T: 39&40 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Tape and Reel Dimension SOT-23 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SOT-23 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm SC-70-3 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 12 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SC-70-3 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Tape and Reel Dimension SC-70-4 P W AME AME PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size 13 Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size SC-70-4 8.0±0.1 mm 4.0±0.1 mm 3000pcs 180±1 mm Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Package Dimension SOT-23 Top View Side View SYMBOLS INCHES MIN MAX MIN MAX A 1.00 1.40 0.0394 0.0551 A1 0.00 0.15 0.0000 0.0059 b 0.35 0.50 0.0138 0.0197 D 2.70 3.10 0.1063 0.1220 E 1.40 1.80 0.0551 0.0709 E H L D MILLIMETERS 1.90 BSC e e θ1 H 2.40 θ1 3.00 0.35BSC L 0 o 10 0.09449 0.11811 0.0138BSC o 0o 10 o b 14 A1 A Front View 0.0748 BSC Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Package Dimension SC-70-3 Top View Side View SYMBOLS D 0.15(0.006) e1 D E/2 E1/2 E E1 0.15(0.006) A C e See Detail A B .10(0.004) M CAB b Front View MAX MIN MAX A 0.80 1.10 0.031 0.043 A1 0.00 0.10 0.000 0.004 A2 0.80 1.00 0.031 0.039 b 0.15 0.40 0.006 0.016 b1 0.15 0.25 0.006 0.010 c 0.08 0.25 0.003 0.010 c1 0.08 0.20 0.003 0.008 D 1.90 2.20 0.075 0.087 E 2.00 2.45 0.079 0.096 E1 1.15 1.35 0.045 0.053 e A2 A SEATING PLANE .10(0.004) A1 C Detail A C INCHES MIN C A MILLIMETERS 0.65BSC 0.0255BSC e1 1.20 1.40 0.047 0.055 L 0.26 0.46 0.010 0.018 θ1 0o 8o 0o 8o θ2 4o 10o 4o 10o SECTION A-A θ1 (b) b1 c1 c .15(.0059) H GAGE PLANE BASE METAL θ L 15 Rev. A.01 AME, Inc. µProcessor Supervisory AME8570 n Package Dimension SC-70-4 D e1 θ e SYMBOLS L E E1 L1 0.20 c d b b1 SIDE VIEW MAX MIN MAX A 0.900 1.100 0.035 0.043 A1 0.000 0.100 0.000 0.004 A2 0.900 1.000 0.035 0.039 b 0.250 0.400 0.010 0.016 b1 0.350 0.500 0.014 0.020 c 0.080 0.150 0.003 0.006 d 0.050 TYP 0.002 TYP D 2.000 2.200 0.079 0.087 E 1.150 1.350 0.045 0.053 E1 2.150 2.450 0.085 0.096 e1 L L1 θ A2 INCHES MIN e TOP VIEW MILLIMETERS 0.650 TYP 1.200 0.026TYP 1.400 0.525 REF 0.260 0 o 0.055 0.021 REF 0.460 8 0.047 o 0.010 0 o 0.018 8o A A1 FRONT VIEW 16 Rev. A.01 www.ame.com.tw E-Mail: [email protected] Life Support Policy: These products of AME, Inc. are not authorized for use as critical components in life-support devices or systems, without the express written approval of the president of AME, Inc. AME, Inc. reserves the right to make changes in the circuitry and specifications of its devices and advises its customers to obtain the latest version of relevant information. AME, Inc. , July 2007 Document: 1221-DS8570-A.01 Corporate Headquarter U.S.A (Subsidiary) AME, Inc. Analog Microelectronics, Inc. 2F, 302 Rui-Guang Road, Nei-Hu District 3100 De La Cruz Blvd., Suite 201 Taipei 114, Taiwan. Tel: 886 2 2627-8687 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: 886 2 2659-2989 Fax: (408) 988-2489