a Open-Drain Microprocessor Supervisory Circuit in 4-Lead SOT-143 ADM6315 FEATURES Superior Upgrade for MAX6315 Specified Over Temperature Low Power Consumption (5 A Typ) Precision Voltage Monitor of Voltages from 2.5 V to 5 V at 100 mV Increments Reset Assertion Down to VCC > 1 V Built-In Manual Reset Pin Compatible with the ADM811 FUNCTIONAL BLOCK DIAGRAM VCC GND VREF ADM6315 RESET APPLICATIONS Microprocessor Systems Controllers Intelligent Instruments Automotive Systems Safety Systems Portable Instruments RESET CIRCUITRY VCC SYSTEM POWER GENERAL DESCRIPTION The ADM6315 is a reliable voltage monitoring device that is suitable for use in most voltage monitoring applications. The ADM6315 is designed to monitor as little as a 1.8% degradation of a power supply voltage. Voltages that can be monitored by the ADM6315 are all voltages (at 100 mV increments) from 2.5 V to 5 V. Included in this circuit is a debounced Manual Reset input. Reset can be activated using an ordinary switch (pulling MR low), by a low input from another digital device or by a degradation of the supply voltage. The manual reset function is very useful, especially if the circuit in which the ADM6315 is operating, enters into a state that can only be detected by the user. Allowing the user to manually reset a system can reduce the damage or danger that could be otherwise caused by an out of control or locked-up system. MR DEBOUNCE ADM6315 MR RESET 10kV mP SYSTEM RESET GND GND Figure 1. Typical Operating Circuit The ADM6315 comes in a cost and space efficient SOT-143 package. REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999 ADM6315–SPECIFICATIONS (V Parameter Min SUPPLY Operating Voltage VCC Supply Current 1.0 CC = Full Operating Range, TA = TMIN to TMAX, VCC Typ = 5 V unless otherwise noted) Typ Max Units Test Conditions/Comments 5 4 5.5 12 12 V µA µA TA = 0°C to +70°C VCC = 5.5 V (No Load) VCC = 3.6 V (No Load) VTH + 1.8% VTH + 2.5% V V TA = +25°C TA = 0°C to +70°C RESET VOLTAGE THRESHOLD (VTH)1 VTH – 1.8% VTH – 2.5% VTH RESET THRESHOLD TEMPERATURE COEFFICIENT 60 ppm/°C VCC TO RESET DELAY 35 µs VCC = Falling at 1 mV/µs ms ms ms ms ADM6315xxD1 ADM6315xxD2 ADM6315xxD3 ADM6315xxD4 VTH > 4.0 V (VIL) VTH > 4.0 V (VIH) VTH < 4.0 V (VIL) VTH < 4.0 V (VIH) 100 V V V V µs ns ns kΩ 0.4 0.3 0.3 1 V V V µA VCC > 4.25 V, ISINK = 3.2 mA VCC > 2.5 V, ISINK = 1.2 mA VCC > 1 V, ISINK = 80 mA VCC > VTH, RESET Deasserted RESET ACTIVE TIMEOUT PERIOD MANUAL RESET Input Threshold 1 20 140 1120 1.4 28 200 1570 2.6 53 370 2960 0.8 2.4 0.3 VCC 0.7 VCC Minimum Input Pulse Glitch Rejection To Reset Delay Pull-Up Resistance 1 32 100 500 63 RESET OUTPUT Output Voltage Output Leakage Current NOTES 1 The ADM6315 is available with preset reset threshold values from 2.5 V to 5 V at 100 mV increments. Specifications subject to change without notice. –2– REV. 0 ADM6315 ABSOLUTE MAXIMUM RATINGS* PIN CONFIGURATION (TA = +25°C unless otherwise noted) Terminal Voltage (With Respect to Ground) VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +6 V All Other Inputs . . . . . . . . . . . . . . . . .–0.3 V to VCC + 0.3 V Input Current VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Output Current RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Power Dissipation (TA = +70°C) RT-4, SOT-143 Derate by 4 mW/°C above +70°C . . . . . . . . . . . 320 mW θJA Thermal Impedance . . . . . . . . . . . . . . . . . . . . 330°C/W Operating Temperature Range . . . . . . . . . . . –40°C to +85°C Storage Temperature Range . . . . . . . . . . . . –65°C to +160°C Lead Temperature (Soldering, 10 secs) . . . . . . . . . . . . +300°C Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . +215°C Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . +220°C ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 kV GND 1 RESET 2 ADM6315 TOP VIEW (Not to Scale) 4 VCC 3 MR PIN FUNCTION DESCRIPTIONS *Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those listed in the operational sections of this specification is not implied. Exposure to absolute maximum ratings for extended periods of time may affect device reliability. Pin Mnemonic Function 1 2 GND RESET 3 MR 4 VCC 0 V. Ground reference for all signals. Active Low Logic Output. RESET remains low while VCC is below the reset threshold or when MR is low, RESET then remains low for either 1 ms (min), 20 ms (min), 140 ms (min) or 1120 ms (min) after VCC rises above the reset threshold and MR is high. Manual Reset. This active low debounced input will ignore input pulses of 100 ns (typical) and is guaranteed to accept input pulses of greater than 1 µs. Leave floating when not used. Monitored supply voltage. ORDERING GUIDE Model Temperature Range Package Description Package Option ADM6315–xxxxxxx-xx* –40°C to +85°C Plastic Surface Mount SOT-143 *Refer to Tables I to IV. REV. 0 –3– ADM6315 –Typical Performance Characteristics 800 MAXIMUM TRANSIENT DURATION – ms 10 8 IDD – mA VCC = 5.5 6 VCC = 3 4 2 0 –40 VCC = 1 700 600 500 400 300 200 100 0 –100 –20 0 20 40 60 TEMPERATURE – 8C 80 100 125 0 4 8 20 60 100 400 800 1200 RESET COMPARATOR OVERDRIVE, VTH-VCC – mV 1600 Figure 5. Maximum Transient Duration vs. RESET Comparator Overdrive Figure 2. Supply Current vs. Temperature 450 1.005 NORMALIZED THRESHOLD – V POWER-DOWN RESET DELAY – ms 400 350 300 250 VOD = 20mV 200 150 100 0.995 VOD = 125mV 50 0 –40 1.000 VOD = 200mV –20 0 20 40 60 TEMPERATURE – 8C 80 100 0.990 –40 125 Figure 3. Power-Down Reset Delay vs. Temperature –20 0 20 40 60 TEMPERATURE – 8C 80 100 125 Figure 6. Normalized Reset Threshold vs. Temperature (VCC Falling) 1.06 12 1.04 10 SUPPLY CURRENT – mA NORMALIZED RESET TIMEOUT – ms +858C 1.02 1.00 0.98 0.96 0.94 –40 8 6 –408C +258C 4 2 0 –20 0 20 40 60 TEMPERATURE – 8C 80 100 125 0 Figure 4. Normalized Reset Timeout Period vs. Temperature (VCC Rising) 1 2 3 SUPPLY VOLTAGE – V 4 5 Figure 7. Supply Current vs. Supply Voltage –4– REV. 0 ADM6315 The MR input will (typical) ignore negative going pulses faster than 100 ns and is guaranteed to accept any negative going input pulse of a duration greater than or equal to 1 µs. If MR is connected to long cables or used in a noisy environment, then placing a 1 µF decoupling capacitor between the MR input and ground will further improve the glitch immunity of the ADM6315. INTERFACING TO OTHER DEVICES OUTPUT The ADM6315 series is designed to integrate with as many devices as possible. One feature of the ADM6315 is the RESET open drain output, which can sink current from sources with a voltage greater than the VCC of the ADM6315 input making it suitable for use in more diverse applications. VCC TRIP-POINT (MAX) THE BENEFITS OF A VERY ACCURATE RESET THRESHOLD VCC TRIP-POINT VCC TRIP-POINT (MIN) Because the ADM6315 series can operate effectively even when there are large degradations of the supply voltages (due to an accurate internal voltage reference circuit), the possibility of a malfunction during a power failure is greatly reduced. VCC RESET ACTIVE TIMEOUT VCC RST VCC TRIP-POINT(MAX) VCC TRIP-POINT VCC TRIP-POINT(MIN) RST Figure 9. VCC Power-Up Timing Diagram VCC TO RESET DELAY TRANSIENT IMMUNITY As well as being an accurate reset circuit, the ADM6315 has good immunity to negative going transients (Figure 5). Because of this characteristic, the ADM6315 is suitable for use in noisy environments. VOL Figure 8. VCC Power-Down/Brownout Timing Diagram Figure 5 shows the reset comparator overdrive (the maximum magnitude of negative going pulses with respect to the typical reset threshold) versus pulse duration, without causing a reset. DETAILED DESCRIPTION The ADM6315 is designed to protect the integrity of a systems operation by ensuring the proper operation of the system during power-up, power-down and brownout conditions. When the ADM6315 is powered-up (depending on the selected reset active timeout), the RESET output of the ADM6315 will remain low for a period typically equalling the Reset Active Timeout Period. This is designed to give the system time to power-up correctly and for the power supply to stabilize before any devices are brought out of reset and allowed to begin executing instructions. Initializing a system in this way provides a more reliable start-up for microprocessor systems. When a brownout condition occurs (assuming VCC is falling at 1 mV/µs), the ADM6315 will produce a reset in typically 35 µs. Producing a reset this fast means that the entire system can be reset together before any part of the systems’ voltage falls below its recommended operating voltage. This can avoid dangerous and/or erroneous operation of a microprocessor-based system. MANUAL RESET INPUT The ADM6315 also provides an additional input, MR. This input can be used as either a means for the system operator to manually reset the system via a switch or for a digital circuit to reset the system. REV. 0 –5– ADM6315 Table I. Table II. Model* TripPoint Min Timeout (ms) Brand ADM6315-50D1ART-RL7 ADM6315-50D1ART-RL ADM6315-49D1ART-RL7 ADM6315-49D1ART-RL ADM6315-48D1ART-RL7 ADM6315-48D1ART-RL ADM6315-47D1ART-RL7 ADM6315-47D1ART-RL ADM6315-46D1ART-RL7 ADM6315-46D1ART-RL ADM6315-45D1ART-RL7 ADM6315-45D1ART-RL ADM6315-44D1ART-RL7 ADM6315-44D1ART-RL ADM6315-43D1ART-RL7 ADM6315-43D1ART-RL ADM6315-42D1ART-RL7 ADM6315-42D1ART-RL ADM6315-41D1ART-RL7 ADM6315-41D1ART-RL ADM6315-40D1ART-RL7 ADM6315-40D1ART-RL ADM6315-39D1ART-RL7 ADM6315-39D1ART-RL ADM6315-38D1ART-RL7 ADM6315-38D1ART-RL ADM6315-37D1ART-RL7 ADM6315-37D1ART-RL ADM6315-36D1ART-RL7 ADM6315-36D1ART-RL ADM6315-35D1ART-RL7 ADM6315-35D1ART-RL ADM6315-34D1ART-RL7 ADM6315-34D1ART-RL ADM6315-33D1ART-RL7 ADM6315-33D1ART-RL ADM6315-32D1ART-RL7 ADM6315-32D1ART-RL ADM6315-31D1ART-RL7 ADM6315-31D1ART-RL ADM6315-30D1ART-RL7 ADM6315-30D1ART-RL ADM6315-29D1ART-RL7 ADM6315-29D1ART-RL ADM6315-28D1ART-RL7 ADM6315-28D1ART-RL ADM6315-27D1ART-RL7 ADM6315-27D1ART-RL ADM6315-26D1ART-RL7 ADM6315-26D1ART-RL ADM6315-25D1ART-RL7 ADM6315-25D1ART-RL 5.00 5.00 4.90 4.90 4.80 4.80 4.70 4.70 4.63 4.63 4.50 4.50 4.39 4.39 4.30 4.30 4.20 4.20 4.10 4.10 4.00 4.00 3.90 3.90 3.80 3.80 3.70 3.70 3.60 3.60 3.50 3.50 3.40 3.40 3.30 3.30 3.20 3.20 3.08 3.08 3.00 3.00 2.93 2.93 2.80 2.80 2.70 2.70 2.63 2.63 2.50 2.50 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MDZ MDZ MDY MDY MDX MDX MDW MDW MDV MDV MDU MDU MDT MDT MDS MDS MDR MDR MDQ MDQ MDP MDP MDO MDO MDN MDN MDM MDM MDL MDL MDK MDK MDJ MDJ MDI MDI MDH MDH MDG MDG MDF MDF MDE MDE MDD MDD MDC MDC MDB MDB MDA MDA Model* TripPoint Min Timeout (ms) Brand ADM6315-50D2ART-RL7 ADM6315-50D2ART-RL ADM6315-49D2ART-RL7 ADM6315-49D2ART-RL ADM6315-48D2ART-RL7 ADM6315-48D2ART-RL ADM6315-47D2ART-RL7 ADM6315-47D2ART-RL ADM6315-46D2ART-RL7 ADM6315-46D2ART-RL ADM6315-45D2ART-RL7 ADM6315-45D2ART-RL ADM6315-44D2ART-RL7 ADM6315-44D2ART-RL ADM6315-43D2ART-RL7 ADM6315-43D2ART-RL ADM6315-42D2ART-RL7 ADM6315-42D2ART-RL ADM6315-41D2ART-RL7 ADM6315-41D2ART-RL ADM6315-40D2ART-RL7 ADM6315-40D2ART-RL ADM6315-39D2ART-RL7 ADM6315-39D2ART-RL ADM6315-38D2ART-RL7 ADM6315-38D2ART-RL ADM6315-37D2ART-RL7 ADM6315-37D2ART-RL ADM6315-36D2ART-RL7 ADM6315-36D2ART-RL ADM6315-35D2ART-RL7 ADM6315-35D2ART-RL ADM6315-34D2ART-RL7 ADM6315-34D2ART-RL ADM6315-33D2ART-RL7 ADM6315-33D2ART-RL ADM6315-32D2ART-RL7 ADM6315-32D2ART-RL ADM6315-31D2ART-RL7 ADM6315-31D2ART-RL ADM6315-30D2ART-RL7 ADM6315-30D2ART-RL ADM6315-29D2ART-RL7 ADM6315-29D2ART-RL ADM6315-28D2ART-RL7 ADM6315-28D2ART-RL ADM6315-27D2ART-RL7 ADM6315-27D2ART-RL ADM6315-26D2ART-RL7 ADM6315-26D2ART-RL ADM6315-25D2ART-RL7 ADM6315-25D2ART-RL 5.00 5.00 4.90 4.90 4.80 4.80 4.70 4.70 4.63 4.63 4.50 4.50 4.39 4.39 4.30 4.30 4.20 4.20 4.10 4.10 4.00 4.00 3.90 3.90 3.80 3.80 3.70 3.70 3.60 3.60 3.50 3.50 3.40 3.40 3.30 3.30 3.20 3.20 3.08 3.08 3.00 3.00 2.93 2.93 2.80 2.80 2.70 2.70 2.63 2.63 2.50 2.50 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 MEZ MEZ MEY MEY MEX MEX MEW MEW MEV MEV MEU MEU MET MET MES MES MER MER MEQ MEQ MEP MEP MEO MEO MEN MEN MEM MEM MEL MEL MEK MEK MEJ MEJ MEI MEI MEH MEH MEG MEG MEF MEF MEE MEE MED MED MEC MEC MEB MEB MEA MEA NOTES ADM6315-xxxxxxx-RL7 are in reels of 3,000 pieces. ADM6315-xxxxxxx-RL are in reels of 10,000 pieces. *Only available in reels. –6– REV. 0 ADM6315 Table III. Table IV. Model* TripPoint Min Timeout (ms) Brand ADM6315-50D3ART-RL7 ADM6315-50D3ART-RL ADM6315-49D3ART-RL7 ADM6315-49D3ART-RL ADM6315-48D3ART-RL7 ADM6315-48D3ART-RL ADM6315-47D3ART-RL7 ADM6315-47D3ART-RL ADM6315-46D3ART-RL7 ADM6315-46D3ART-RL ADM6315-45D3ART-RL7 ADM6315-45D3ART-RL ADM6315-44D3ART-RL7 ADM6315-44D3ART-RL ADM6315-43D3ART-RL7 ADM6315-43D3ART-RL ADM6315-42D3ART-RL7 ADM6315-42D3ART-RL ADM6315-41D3ART-RL7 ADM6315-41D3ART-RL ADM6315-40D3ART-RL7 ADM6315-40D3ART-RL ADM6315-39D3ART-RL7 ADM6315-39D3ART-RL ADM6315-38D3ART-RL7 ADM6315-38D3ART-RL ADM6315-37D3ART-RL7 ADM6315-37D3ART-RL ADM6315-36D3ART-RL7 ADM6315-36D3ART-RL ADM6315-35D3ART-RL7 ADM6315-35D3ART-RL ADM6315-34D3ART-RL7 ADM6315-34D3ART-RL ADM6315-33D3ART-RL7 ADM6315-33D3ART-RL ADM6315-32D3ART-RL7 ADM6315-32D3ART-RL ADM6315-31D3ART-RL7 ADM6315-31D3ART-RL ADM6315-30D3ART-RL7 ADM6315-30D3ART-RL ADM6315-29D3ART-RL7 ADM6315-29D3ART-RL ADM6315-28D3ART-RL7 ADM6315-28D3ART-RL ADM6315-27D3ART-RL7 ADM6315-27D3ART-RL ADM6315-26D3ART-RL7 ADM6315-26D3ART-RL ADM6315-25D3ART-RL7 ADM6315-25D3ART-RL 5.00 5.00 4.90 4.90 4.80 4.80 4.70 4.70 4.63 4.63 4.50 4.50 4.39 4.39 4.30 4.30 4.20 4.20 4.10 4.10 4.00 4.00 3.90 3.90 3.80 3.80 3.70 3.70 3.60 3.60 3.50 3.50 3.40 3.40 3.30 3.30 3.20 3.20 3.08 3.08 3.00 3.00 2.93 2.93 2.80 2.80 2.70 2.70 2.63 2.63 2.50 2.50 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 140 MFZ MFZ MFY MFY MFX MFX MFW MFW MFV MFV MFU MFU MFT MFT MFS MFS MFR MFR MFQ MFQ MFP MFP MFO MFO MFN MFN MFM MFM MFL MFL MFK MFK MFJ MFJ MFI MFI MFH MFH MFG MFG MFF MFF MFE MFE MFD MFD MFC MFC MFB MFB MFA MFA NOTES All parts in bold are ex-stock. Consult factory for availability of orders. ADM6315-xxxxxxx-RL7 are in reels of 3,000 pieces. ADM6315-xxxxxxx-RL are in reels of 10,000 pieces. *Only available in reels. REV. 0 –7– Model* TripPoint Min Timeout (ms) Brand ADM6315-50D4ART-RL ADM6315-50D4ART-RL7 ADM6315-49D4ART-RL ADM6315-49D4ART-RL7 ADM6315-48D4ART-RL ADM6315-48D4ART-RL7 ADM6315-47D4ART-RL ADM6315-47D4ART-RL7 ADM6315-46D4ART-RL ADM6315-46D4ART-RL7 ADM6315-45D4ART-RL ADM6315-45D4ART-RL7 ADM6315-44D4ART-RL ADM6315-44D4ART-RL7 ADM6315-43D4ART-RL ADM6315-43D4ART-RL7 ADM6315-42D4ART-RL ADM6315-42D4ART-RL7 ADM6315-41D4ART-RL ADM6315-41D4ART-RL7 ADM6315-40D4ART-RL ADM6315-40D4ART-RL7 ADM6315-39D4ART-RL ADM6315-39D4ART-RL7 ADM6315-38D4ART-RL ADM6315-38D4ART-RL7 ADM6315-37D4ART-RL ADM6315-37D4ART-RL7 ADM6315-36D4ART-RL ADM6315-36D4ART-RL7 ADM6315-35D4ART-RL ADM6315-35D4ART-RL7 ADM6315-34D4ART-RL ADM6315-34D4ART-RL7 ADM6315-33D4ART-RL ADM6315-33D4ART-RL7 ADM6315-32D4ART-RL ADM6315-32D4ART-RL7 ADM6315-31D4ART-RL ADM6315-31D4ART-RL7 ADM6315-30D4ART-RL ADM6315-30D4ART-RL7 ADM6315-29D4ART-RL ADM6315-29D4ART-RL7 ADM6315-28D4ART-RL ADM6315-28D4ART-RL7 ADM6315-27D4ART-RL ADM6315-27D4ART-RL7 ADM6315-26D4ART-RL ADM6315-26D4ART-RL7 ADM6315-25D4ART-RL ADM6315-25D4ART-RL7 5.00 5.00 4.90 4.90 4.80 4.80 4.70 4.70 4.63 4.63 4.50 4.50 4.39 4.39 4.30 4.30 4.20 4.20 4.10 4.10 4.00 4.00 3.90 3.90 3.80 3.80 3.70 3.70 3.60 3.60 3.50 3.50 3.40 3.40 3.30 3.30 3.20 3.20 3.08 3.08 3.00 3.00 2.93 2.93 2.80 2.80 2.70 2.70 2.63 2.63 2.50 2.50 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 1120 MGZ MGZ MGY MGY MGX MGX MGW MGW MGV MGV MGU MGU MGT MGT MGS MGS MGR MGR MGQ MGQ MGP MGP MGO MGO MGN MGN MGM MGM MGL MGL MGK MGK MGJ MGJ MGI MGI MGH MGH MGG MGG MGF MGF MGE MGE MGD MGD MGC MGC MGB MGB MGA MGA ADM6315 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). C3460–8–3/99 4-Lead Plastic Surface Mount Package (SOT-143) 0.079 (2.00) 0.071 (1.80) 3 4 0.055 (1.40) 0.047 (1.20) 0.098 (2.50) 0.083 (2.10) 1 78 0.004 (0.10) 0.001 (0.03) 0.080 (2.03) 0.070 (1.78) 0.120 (3.05) 0.105 (2.67) SEATING 0.037 (0.94) PLANE 0.030 (0.77) 0.040 (1.02) 0.031 (0.79) 0.021 (0.54) 0.015 (0.38) 0.0059 (0.089) 0.0035 (0.15) 88 08 0.010 (0.25) 0.005 (0.13) PRINTED IN U.S.A. PIN 1 2 –8– REV. 0