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| Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n General Description The AME8500 family allows the user to customize the CPU reset function without any external components. The user has a large choice of reset voltage thresholds, reset time intervals, and output driver configurations, all of which are preset at the factory. Each wafer is trimmed to the customer's specifications. These circuits monitor the power supply voltage of P 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 for supply voltages greater than 1V. The AME8501 includes all the above functionality plus an overtemperature shutdown function. When the ambient temperature exceeds 800C a reset is asserted and remains asserted until the temperature falls below 600C. Space saving SOT23 packages and micropower quiescent current (<3.0A) make this family a natural for portable battery powered equipment. n Features l l l l l l l l l Small packages: SOT-23, SOT-89 11 voltage threshold options Tight voltage threshold tolerance ---1.50% 4 reset interval options 4 output configuration options Wide temperature range -------- -40oC to 85oC Low temperature coefficient --- 100ppm/oC (max) Low quiescent current < 3.0A Thermal shutdown option (AME8501) n Applications l l l l l l Portable electronics Power supplies Computer peripherals Data acquisition systems Applications using CPUs Consumer electronics 1 Analog Microelectronics, Inc. AME8500 / 8501 n Pin Configuration AME8500AEET AME8501AEET AME8500BEET AME8501BEET AME8500CEET AME8501CEET Micropower P Reset Family 3 3 3 1 2 1 2 1 2 1: GND 2: Reset/ResetB 3: VDD 1: Reset/ResetB 2: GND 3: VDD 1: Reset/ResetB 2: VDD 3: GND AME8500AEFT AME8501AEFT AME8500BEFT AME8501BEFT AME8500CEFT AME8501CEFT 1 2 3 1 2 3 1 2 3 1: GND 2: VDD 3: Reset/ResetB 1: Reset/ResetB 2: VDD 3: GND 1: VDD 2: GND 3: Reset/ResetB 2 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n Ordering Information AME8500xEET AME8501xEET AME8500xEFT AME8501xEFT X X X X X X X X XX XX XX XX ( SOT-23) ( SOT-23) ( SOT-89) ( SOT-89) VDD Threshold Voltage (VTH ) 21: V TH=2.1V 24: V TH=2.4V 26: V TH=2.63V 27: V TH=2.7V 28: V TH=2.8V 29: V TH=2.93V 31: V TH=3.08V 40: V TH=4.0V 42: V TH=4.20V 44: V TH=4.38V 46: V TH=4.63V note: Please contact AME sales dept. for other voltage options. Reset Time (TD2NOM) A: D: E: F: TD=1.5mS TD=30mS TD=150mS TD=210mS Output Driver Option characteristic of RESET or RESETB pin --For example-AME8500AEETAF27 means: Output is RESETB, push pull Reset time is 210mS V DD threshold voltage is 2.7V No temperature shutdow n A: B: C: D: Polarity RESETB RESETB RESET RESET * PP OD PP OD * Output Driver Chart Explanation: PP = Push pull output OD = Open drain output Polarity RESET = Active high Note: AME8500 without over-temperature thermal shutdown function. AME8501 with over-temperature thermal shutdown function. 3 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n Absolute Maximum Ratings Parameter Supply Voltage ESD Classification Input Current, V DD Output Current, RESET, ResetB Rate of Rise, V DD Maximum 7 B 20 20 100 mA mA V/s Unit V n Recommended Operating Conditions Parameter Supply Voltage Ambient Temperature Range Junction Temperature Storage Temperature Rating 1.6 - 5 V -40 to +85 C -40 to +125 C -65 to 150 C O o o n Thermal Information Parameter Thermal Resistance (SOT-23) Thermal Resistance (SOT-89) Power Dissipation (SOT-23) Power Dissipation (SOT-89) Maximum Junction Temperature Maximum Lead Temperature ( 10 Sec) Maximum 325 180 350 mW 650 150 300 o o Unit o C /W C C Caution: Stress above the listed absolute rating may cause permanent damage to the device 4 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n Electrical Specifications T A = 25 o C unless otherw noted ise PA METER RA VDD Range* SYMBOL VRANGE TEST CONDITIONS MIN 1 TYP MA X 5.5 UNITS V TA=-40~85OC VDD=3.0V Supply Current IDD VDD=3.0V, TA=-40~85OC 1 5.5 3.0 5.0 A VTHNOM-1.5% Reset Threshold VTH TA=-40~85OC Hysteresis Range RESET Threshold Tempco RESETB Output Voltage Low VOL RESET Output Voltage Low RESETB Output Voltage High VOH RESET Output Voltage High VDD to Reset Delay TD1 VDD 0.5 V ISOURCE=0.5mA, TA= -40~85OC 0.8VDD V VDD= VTH - 100mV, TA= -40 ~ 85OC Version A Version D 0.5 15 80 140 40 1.5 30 150 210 80 20 200 5 50 230 500 S mS mS mS mS o Reset Timeout Period* TD2 TA= -40 ~ 85OC Version E Version F Temperature Shutdown Temperature Shutdown Hysteresis TOFF THYS AME8501 only AME8501 only C C o Note1: The data based on VTH=2.7V part type. 5 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n AME8500/01 pin description Name GND Ground Description This pin can be ordered as RESET or RESETB/ RESETB. RESET is active high. RESETB RESET is active low. It is also available with an open drain or pushpull output. Positive power supply. A reset is asserted after this voltage drops below a predetermined level. After VDD rises above VDD that level the reset output remains asserted until the end of the reset timeout period. 6 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n Timing Diagram VTH VTH V DD T D2 50% T D1 50% RESET T D2 50% T D1 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 140 120 Glitch Duration (S) 100 80 60 40 20 0 0.01 0.1 1 Glitch Amplitude (V) 7 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family Reset Time vs. Temperature 220 215 I D D vs. Temperatrue 2.35 Supply Current @ 5V (uA) 2.30 2.25 2.20 2.15 2.10 Reset Time (mS) 210 205 200 195 190 -45 -5 AME8500AEETAF26 AME8500AEETAF26 25 55 85 115 Te m pe ra ture (0C) -45 -5 25 55 85 115 Temperature (0C) Reset Vth vs. Temperature 2.650 2.648 2.646 1.6 2 I D D vs. V D D AME8500AEETAF26 85 O C Reset Vth (V) 2.644 2.640 2.638 2.636 2.634 2.632 2.630 -45 0 0.4 IDD (A) 2.642 1.2 0.8 0OC -40 O C -5 25 55 85 115 0 1 2 3 4 5 Temperature (0C) TD1 Delay vs. Temperature 43 42 0.5 V D D (V) Threshold Hysteresis vs. Temperature Hysteresis (% of VTH) 0.4 0.3 TD2 Delay (S) 41 40 39 38 37 -40 -20 0 20 40 60 80 100 0.2 0.1 0 -40 -20 0 20 40 60 80 100 8 Temperature ( O C) Temperature (O C) Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family Reset VOL vs. Temperature 0.265 Reset VOL @ 0.8mA (V) 0.260 0.255 0.250 0.245 0.240 0.235 0.230 0.225 0.220 -45 -5 25 55 0 AME8500AEETAF26 85 115 Temperature ( C) 9 Analog Microelectronics, Inc. AME8500 / 8501 Micropower P Reset Family n Package Dimension SOT-23 SYMBOLS A A1 A2 b C D E e H L 1 MILLIMETERS MIN 1.00 0.00 0.70 0.35 0.09 2.70 1.40 MAX 1.40 0.15 1.25 0.50 0.25 3.10 1.80 INCHES MIN 0.0394 0.0000 0.0276 0.0138 0.0035 0.1063 0.0551 MAX 0.0551 0.0059 0.0492 0.0197 0.0098 0.1220 0.0709 1.90 BSC 2.60 0.35 0 o 0.0748 BSC 0.1024 0.0138 0 o 3.00 0.55 9 o 0.1181 0.0197 9o SOT-89 SY BOLS M A A1 b b1 C D D1 H E E e H S1 M ILLIM TE E RS M IN 1.40 0.89 0.36 0.41 0.35 4.40 1.35 2.29 2.90 0.35 1.40 M AX 1.60 0.52 0.56 0.44 4.60 1.83 4.25 2.60 3.10 0.70 1.60 M IN INCHE S M AX 0.0630 0.0205 0.0220 0.0173 0.1811 0.0720 0.1673 0.1024 0.1220 0.0276 0.0630 0.0551 0.0350 0.0142 0.0161 0.0138 0.1732 0.0531 0.0902 0.1142 0.0138 0.0551 10 www.analogmicro.com E-Mail: info@analogmicro.com Life Support Policy: These products of Analog Microelectronics, Inc. are not authorized for use as critical components in lifesupport devices or systems, without the express written approval of the president of Analog Microelectronics, Inc. Analog Microelectronics, 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. (c) Analog Microelectronics, Inc. , December 2001 Document: 2007-DS8500/8501-F Corporate Headquarters Analog Microelectronics, Inc. 3100 De La Cruz Blvd. Suite 201 Santa Clara, CA. 95054-2046 Tel : (408) 988-2388 Fax: (408) 988-2489 Asia Pacific Headquarters AME, Inc. 2F, No. 187 Kang-Chien Road, Nei-Hu District Taipei 114, Taiwan, R.O.C. Tel : 886 2 2627-8687 Fax : 886 2 2659-2989 |
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