(MAX707 / MAX708) UP Supervisory Circuits

www.DataSheet4U.com MAX707, MAX708 mP Supervisory Circuits The MAX707/708 are cost−effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 20 msec of VCC falling through the reset voltage threshold. Reset is maintained with 200 mS of delay time after VCC rise above the reset threshold. The MAX707/708 have a low quiescent current of 12 mA at VCC = 3.3 V, an active−high RESET and active−low RESET with a push−pull output. The output is guaranteed valid down to VCC = 1.0 V. The MAX707/708 have a Manual Reset MR input and a +1.25 V threshold detector for power−fail input PFI. These devices are available in a Micro8 and SOIC−8 package. Features http://onsemi.com MARKING DIAGRAMS 8 8 Micro8t CUA SUFFIX CASE 846A 1 xxx A Y W G = Specific Device Code = Assembly Location = Year = Week = Pb−Free Package 8 8 1 SOIC−8 ESA SUFFIX CASE 751 1 xxxxx ALYWG G 1 xxx AYW G • Precision Supply−Voltage Monitor MAX707: 4.63 V Reset Threshold Voltage MAX708: Standard Reset Threshold Voltages (Typical): 4.38 V, 3.08 V, 2.93 V, 2.63 V Reset Threshold Available from 1.6 V to 4.9 V with 100 mV Increments (Factory Option) 200 mS (Typ) Reset Timeout Delay 12 mA (VCC = 3.3 V) Quiescent Current Active_High and Active_Low Reset Output Guaranteed RESET_L and RESET Output Valid to VCC = 1.0 V Voltage Monitor for Power−Fail or Low−Battery Warning 8 Pin SOIC or Micro8 Package Pb−Free Packages are Available • • • • • • • • • • • • xxxxx = Specific Device Code AL = Assembly Lot Code Y = Year W = Week G = Pb−Free Package (Note: Microdot may be in either location) PIN CONFIGURATION Micro8 RESET 1 RESET 2 MR 3 VCC 4 (Top View) 8 NC 7 PFO 6 PFI 5 GND Applications Computers Embedded System Battery Powered Equipment Critical mP Power Supply Monitor SOIC−8 MR 1 VCC 2 GND 3 PFI 4 (Top View) 8 RESET 7 RESET 6 NC 5 PFO ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 8 of this data sheet. © Semiconductor Components Industries, LLC, 2005 1 August, 2005 − Rev. 4 Publication Order Number: MAX707/D MAX707, MAX708 VCC RESET MR RESET GENERATOR VCC + − VTH PFI + − 1.25 V PFO RESET GND Figure 1. Representative Block Diagram MAXIMUM RATINGS (Note 1) Rating Supply Voltage Output Voltage Output Current (All Outputs) Input Current (VCC and GND) Thermal Resistance Junction−to−Air Micro8 SOIC−8 Operating Ambient Temperature Storage Temperature Range LatchUp Performance Positive Negative TA Tstg ILATCHUP 300 280 Symbol VCC Vout Iout Iin RqJA 248 187 −40 to +85 −40 to +125 °C °C mA Value 6.0 −0.3 to (VCC + 0.3) 20 20 Unit V V mA mA °C/W Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected. 1. This device series contains ESD protection and exceeds the following tests: Human Body Model 2000 V per MIL−STD−883, Method 3015. Machine Model Method 200 V. 2. The maximum package power dissipation limit must not be exceeded. TJ(max) * TA with TJ(max) = 150°C PD + RqJA http://onsemi.com 2 MAX707, MAX708 ELECTRICAL CHARACTERISTICS (VCC = 1.0 V to 5.5 V, TA = −40°C to +85°C, unless otherwise noted. Typical values are at TA = 25°C, VCC = 3.3 V.) Characteristics Operating Voltage Range Supply Current VCC = 3.3 V VCC = 5.5 V Reset Threshold MAX707 TA = +25°C TA = −40°C to +85°C MAX708 TA = +25°C TA = −40°C to +85°C MAX708T TA = +25°C TA = −40°C to +85°C MAX708S TA = +25°C TA = −40°C to +85°C MAX708R TA = +25°C TA = −40°C to +85°C Reset Threshold Hysteresis VCC Falling Reset Delay (VCC = VTH + 0.2 V to VTH − 0.2 V) Reset Active Timeout Period RESET_L, RESET_H Output Low Voltage VCC w 1.0 V, Iol = 100 mA VCC u 2.7 V, Iol = 1.2 mA VCC u 4.5 V, Iol = 3.2 mA RESET_L, RESET_H Output High Voltage VCC w 1.0 V, Ioh = 50 mA VCC u 2.7 V, Ioh = 500 mA VCC u 4.5 V, Ioh = 800 mA MR_L Pull−up Resistance MR_L Pulse Width (VTH (max) t VCC t 5.5 V) MR_L Glitch Rejection (VTH (max) t VCC t 5.5 V) MR_L High_level Input Threshold (VTH (max) t VCC t 5.5 V) MR_L Low_level Input Threshold (VTH (max) t VCC t 5.5 V) MR_L to RESET_L and RESET_H Output Delay (VTH (max) t VCC t 5.5 V) PFI Input Threshold (VCC = 3.3 V, PFI Falling) PFI Input Current PFI to PFO Delay (VCC = 3.3 V, VOVERDRIVE = 15 mV) PFO_L Output Low Voltage VCC = 2.7 V, Iol = 1.2 mA VCC = 4.5 V, Iol = 3.2 mA PFO_L Output High Voltage VCC = 2.7 V, Ioh = 500 mA VCC = 4.5 V, Ioh = 800 mA Symbol VCC ICC − − VTH 4.56 4.50 4.31 4.25 3.03 3.00 2.89 2.85 2.59 2.55 VHYS tPD tRP Vol − − − Voh 0.8 VCC 0.8 VCC 0.8 VCC RMRI tMR − VIH VIL tMD − − − Vol − − Voh 0.8 VCC 0.8 VCC − − − − − − 0.3 0.3 V 50 1.0 − 0.7 VCC − − 1.20 −250 − − − − − − 0.1 − − 0.2 1.25 0.01 3.0 − − − − − − − 0.3 VCC − 1.3 250 − KW mS mS V V mS V nA mS V − − − 0.3 0.3 0.3 V − − 140 4.63 4.70 4.75 4.45 4.50 3.13 3.15 2.97 3.00 2.67 2.70 − − 330 mV mS mS V 12 16 22 28 V Min 1.0 Typ − Max 5.5 Unit V mA 4.38 3.08 2.93 2.63 0.01 VTH 20 200 http://onsemi.com 3 MAX707, MAX708 PIN DESCRIPTION (Pin No. with parentheses is for Micro8 package.) IOUT, OUTPUT SINK CURRENT (mA) 3.0 TA = 25°C 2.5 2.0 1.5 1.0 0.5 0 0 0.5 1.0 1.5 2.0 Vout, OUTPUT VOLTAGE (V) Vin = 1.0 V Vin = 1.5 V IOUT, OUTPUT SOURCE CURRENT (mA) Iout, OUTPUT SOURCE CURRENT (mA) IOUT, OUTPUT SINK CURRENT (mA) Á ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Á ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁÁÁÁÁ ÁÁÁÁÁÁ Á ÁÁÁÁÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ ÁÁ ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ 1 (3) 2 (4) 3 (5) 4 (6) 5 (7) 6 (8) MR Manual Reset Input. MR can be driven from TTL/CMOS logic or from a manual Reset switch. This input, when floating, is internally pulled up to VCC with 50 kW resistor. VCCÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ Supply Voltage: C = 100 nF is recommended as a bypass capacitor between VCC and GND. Ground Reference GND PFI Power Fail Voltage Monitor Input. When PFI is less than 1.25 V, PFO goes low. Connect PFI to GND or VCC when not used. Power Fail Monitor Output. When PFI is less than 1.25 V, it goes low and sinks current. Otherwise, it remains high. Non−connective Pin PFO NC 7 (1) 8 (2) RESET RESET Active Low RESET can be triggered by VCC below the threshold level or by a low signal on MR. It remains low for 200 ms (typ.) after VCC rises above the reset threshold. Active high RESET output the inverse of RESET one. 20 18 16 14 12 10 8 6 4 2 0 0 1.0 2.0 3.0 4.0 5.0 6.0 Vin, INPUT VOLTAGE (V) Vin − 0.5 V Vin − 1.0 V Vin − 1.5 V TA = 25°C Vout = Vin − 2.0 V Pin No. Symbol Description Figure 2. MAX707/708 Series 1.60 V Reset Output Sink Current vs. Output Voltage Figure 3. MAX707/708 Series 1.60 V Reset Output Source Current vs. Input Voltage 12 TA = 25°C 10 8 Vin = 2.0 V 6 4 2 0 0 0.5 1.0 1.5 2.0 2.5 3.0 Vout, OUTPUT VOLTAGE (V) Vin = 2.5 V 20 18 16 14 12 10 8 6 4 2 0 0.0 1.0 2.0 3.0 4.0 Vin − 0.5 V 5.0 6.0 Vin − 1.0 V Vin −1.5 V TA = 25°C Vout = Vin − 2.0 V Vin = 1.5 V Vin, INPUT VOLTAGE (V) Figure 4. MAX707/708 Series 2.93 V Reset Output Sink Current vs. Output Voltage Figure 5. MAX707/708 Series 2.93 V Reset Output Source Current vs. Input Voltage http://onsemi.com 4 MAX707, MAX708 Vin = 4.0 V Iout, OUTPUT SOURCE CURRENT (mA) 30 Iout, OUTPUT SINK CURRENT (mA) TA = 25°C 25 20 Vin = 3.0 V 15 10 Vin = 2.0 V 5 0 0.0 20 18 16 14 12 10 8 6 4 2 0 0.0 1.0 2.0 3.0 4.0 5.0 6.0 Vin − 0.5 V Vin − 1.0 V Vin − 1.5 V TA = 25°C Vout = Vin − 2.0 V 1.0 2.0 3.0 4.0 5.0 Vout, OUTPUT VOLTAGE (V) Vin, INPUT VOLTAGE (V) Figure 6. MAX707/708 Series 4.90 V Reset Output Sink Current vs. Output Voltage VDET, DETECTOR THRESHOLD VOLTAGE (VOLTS) VDET, DETECTOR THRESHOLD VOLTAGE (VOLTS) 1625 VDET+ 3120 3110 3100 3090 3080 3070 3060 −50 Figure 7. MAX707/708 Series 4.90 V Reset Output Source Current vs. Input Voltage 1620 1615 1610 1605 VDET+ 1600 1595 1590 1585 −50 −25 0 25 50 75 100 VDET− VDET− −25 0 25 50 75 100 TA, AMBIENT TEMPERATURE (°C) TA, AMBIENT TEMPERATURE (°C) Figure 8. MAX707/708 Series 1.60 V Detector Threshold Voltage vs. Temperature VDET, DETECTOR THRESHOLD VOLTAGE (VOLTS) TPD, VCC, FALLING RESET DELAY (ms) 5020 VDET+ 45 40 35 30 25 20 15 10 5 Figure 10. MAX707/708 Series 2.93 V Detector Threshold Voltage vs. Temperature 5000 4980 4960 4940 VTH = 4.90 V VTH = 2.93 V VTH = 1.60 V 4920 4900 4880 −50 VDET− −25 0 25 50 75 100 0 −40 −20 0 20 40 6