CM3400

CM3400 Micropower, Universal Supply Voltage Supervisor (SVS) Features • • • • • • • • Temperature stable 1.0V trigger reference User adjustable reset threshold User adjustable reset delay time > 25msec Complimentary outputs (RESET, RESET) Integrated pull-up/down resistors Manual reset (MR) control input Low operating current (40µA typ.) 8-lead MSOP and SOIC package Product Description The CM3400 is a universal supply voltage supervisory (SVS) controller for critical power monitoring and power sequencing applications. During an initial power-up, both complimentary outputs (RESET, RESET) remain active. Once the supply voltage being monitored exceeds the user programmed reset threshold, the outputs will remain active for an additional timeout interval which is also user controlled. Both outputs become inactive once the delay interval has expired. The user controlled reset threshold is determined by two external resistors as follows: Reset Threshold [V] = (R1 + R2) / R2 The delay time is set by an external capacitor CT, as follows (where CT is in [nF]): Reset Delay [ms] = (375 x CT[nF]) + 25 [ms] During a brown-out condition, both outputs will immediately become active and remain active until the supply being monitored has been restored for a period exceeding the delay pulse. During a complete powerdown situation, both outputs will continually "hug" their respective rails. This is achieved by the use of integrated pull-up/down resistors. The CM3400 is available in a low profile MSOP-8 and a SOIC-8 package. Applications • • • Critical power monitoring Power-up sequencing Memory integrity during "brownouts" Typical Application Circuit Simplified Electrical Schematic VDD CM3400 R1 + R2 CT GND CT GND GND CT 1µA VDD SENSE RESET MR RESET uP or Memory Control MR Falling Edge Delay 100K VTH + EN tDELAY RESET RESET 200K SENSE - © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 1 CM3400 PACKAGE / PINOUT DIAGRAM Top View N.C. MR CT GND 1 2 3 4 8 7 6 5 Top View VDD SENSE RESET RESET N.C. MR CT GND 1 2 3 4 8 7 6 5 VDD SENSE RESET RESET 8-pin SOIC Note: This drawing is not to scale. 8-pin MSOP PIN DESCRIPTIONS PIN(S) 1 2 NAME N.C. MR DESCRIPTION No connect. Active-Low manual reset control input. Whenever this input is taken logic low (grounded), the device will immediately force a reset condition. Upon releasing from ground the reset will remain active for the duration of the reset delay timing TDELAY interval. This contains an internal pull-up current source and may be left unconnected if not used. Capacitor timing control input. The timeout delay interval produced by the external timing capacitor is 25ms/nF. A temperature stable internal current source (0.2µA) is used to accurately control the user programmable delay interval. If no external timing capacitor is present, the delay timeout interval is 25ms. Negative reference for all voltages. Active-low reset output. Whenever VOUT falls below the Reset threshold, the logic output immediately is driven low (to GND). Upon VOUT rising above the Reset threshold, the logic output remains low (at GND) for an additional delay time duration Td, after which it is driven to a logic high level (set by VOUT). The power-on reset circuitry remains enabled under all conditions and produces a valid output logic, even when VCC is not present. Active-high reset output. Inverse of RESET. Positive input voltage to the accurate 1.0 volt threshold comparator. Whenever this input is below the trigger threshold (1.0V) both logic outputs are immediately held in their respective Active state. When this input signal rises past the trigger threshold voltage, the delay timer will start and both logic outputs will still remain Active. Once the delay time has been reached both logic outputs will toggle to their respective Inactive state. Input power source for the device. The device is designed to operate with supply voltage of 2.5V or greater. Whenever the supply voltage is below 2.5V (i.e during power-up / power-down) an internal undervoltage lockout circuit is activated which prevents any false triggering on the RESET logic outputs. This feature ensures the logic outputs will "hug" their respective rail and produce valid outputs under all supply conditions. (Conventional Supervisory circuits can generate undefined output conditions during initial power-up sequences) 3 CT 4 5 GND RESET 6 7 RESET SENSE 8 VDD © 2003 California Micro Devices Corp. All rights reserved. 2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 10/06/03 CM3400 Ordering Information PART NUMBERING INFORMATION Pins 8 8 Package MSOP-8 SOIC-8 Ordering Part Number2 CM3400-00MS CM3400-00SN Part Marking 171CMD CMPWR171SN Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER ESD Protection (HBM) Pin Voltages VDD, SENSE, MR, CT Inputs RESET, RESET Outputs Storage Temperature Range Operating Temperature Range Ambient RATING +1500 [GND - 0.5] to +6.5 [GND - 0.5] to [VDD + 0.5] -40 to +150 -40 to +125 UNITS V V V °C °C STANDARD OPERATING CONDITIONS PARAMETER VDD Supply SENSE Input CT Timing Capacitor Ambient Operating Temperature Range VALUE 2.5 to 5.5 0 to 5.5 0 to 3.3 0 to +70 UNITS V V nF °C © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 3 CM3400 Specifications (cont’d) ELECTRICAL OPERATING CHARACTERISTICS1 SYMBOL VTH ISENSE ICT TDELAY PARAMETER SENSE Threshold Trigger Level SENSE Input Bias Current Timing Current Source Timing Capacitor Delay (applies to RESET & RESET outputs) CT not connected (default) CT = 0.1nF CT = 1nF IGND tPHL Ground Current Propagation Delay When Asserting RESET No load. SENSE < (VTH - 50mV) 0.10 15 35 225 0.16 25 55 325 40 0.5 CONDITIONS MIN 0.95 TYP 1.00 MAX 1.05 1 0.25 35 75 425 70 5 UNITS V µA µA mS mS mS µA µS RESET Pin RPULLUP RPULLDOWN RESET Pull-up Impedance RESET Pull-down Impedance VDD < 1.0V VDD > 2.5V 100 0.5 0.5 500 3 3 kΩ kΩ kΩ RESET Pin RPULLDOWN RPULLUP RESET Pull-down Impedance RESET Pull-up Impedance VDD < 1.0V VDD > 2.5V 200 0.5 0.5 500 3 3 kΩ kΩ kΩ MR Pin IMR VIH MR VIL MR tMR Internal Pull-up Current High Detect Input Level Low Detect Input Level Propagation Delay 0.5 1.5 0.3 2 2 5 µA V V µS Note 1: Electrical Operating Characteristics are specified over the Standard Operating Conditions unless specified otherwise. © 2003 California Micro Devices Corp. All rights reserved. 4 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 10/06/03 CM3400 Performance Information CM3400 Typical Transient Characteristics (nominal conditions unless specified otherwise) Transient Operation Description (VDD > 2.5V) Actual Transient Operation Threshold Trigger Voltage vs. Supply 1100 1000 THRESHOLD [mV] RESET Comparator Response With Overdrive 4 900 800 700 600 500 2.0 2.5 3.0 3.5 4.0 4.5 5.0 SUPPLY VOLTAGE [V] RESPONSE [us] 3 2 1 0 0 50 100 OVERDRIVE [mV] 150 200 Timeout Delay With CT Capacitance 1000 TIMEOUT DELAY [ms] 100 10 0.01 0.10 CT [nF] 1.00 © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 5 CM3400 Performance Information (cont’d) CM3400 Typical DC Characteristics (nominal conditions unless specified otherwise) Sense Input Current vs. Voltage 2.5 2.0 1.5 1.0 0.5 0.0 0 1 2 3 4 5 SENSE VOLTAGE [V] Ground Current vs. Supply 50 40 30 20 10 0 0 1 2 3 4 SU PPL Y VOL TAGE [V] 5 SENSE CURRENT [nA] RESET Pull-down Drive Resistance 100 0 GROUND CURRENT [uA] RESET Pull-up Drive Resistance 0.5 0.4 0.3 0.2 0.1 0.0 2 3 4 SUPPLY VOLTAGE [V] 5 6 PULL DOWN RESISTANCE [kΩ ] 10 1 0 0 1 2 SUPPLY VOLTAGE [V] 3 RESET Pull-down Drive Resistance 100 0 PULL UP RESISTANCE [kΩ ] DRIVE RESISTANCE [kΩ] 10 0 RESET Pull-down Drive Resistance 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 PULL UP RESISTANCE [kΩ] 10 0 10 1 0 0 1 2 SUPPLY VOLTAGE [V] 3 2 3 4 SUPPLY VOLTAGE [V] 5 6 © 2003 California Micro Devices Corp. All rights reserved. 6 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 10/06/03 CM3400 Performance Information (cont’d) CM3400 Typical Thermal Characteristics (nominal conditions unless specified otherwise) RESET Propagation Delay vs. Temperature tPHL - Reset Propogation Delay [ns ] 220 215 RESET Release Delay (default) vs. Temperature 30 205 200 195 190 185 180 25 50 75 100 Temperat ure [oC] 125 TIMEOUT DELAY [ms] 210 28 25 23 20 25 50 75 TEMPERATUR E [oC] 1 00 1 25 Ground Current vs. Temperature 50 45 40 35 Reset Threshold Change [mV] SENSE Threshold vs. Temperature 10 8 6 4 2 0 -2 -4 -6 -8 25 50 75 100 Temperatu re [oC] 125 IGND [uA] 30 25 20 15 10 5 0 25 50 75 100 Temperature [oC] 125 -10 © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 7 CM3400 Mechanical Details The CM3400 is available in an 8-pin SOIC and an 8-pin MSOP package. Dimensions for each of these packages are presented in this section. SOIC-8 Mechanical Specifications Dimensions for CM3400-00SN devices packaged in 8pin SOIC packages are presented below. For complete information on the SOIC-8 package, see the California Micro Devices SOIC Package Information document. Mechanical Package Diagrams TOP VIEW D 8 7 6 5 PACKAGE DIMENSIONS Package Pins Dimensions A A1 B C D E e H L # per tube # per tape and reel Millimeters Min 1.35 0.10 0.33 0.19 4.80 3.80 5.80 0.40 Max 1.75 0.25 0.51 0.25 5.00 4.19 6.20 1.27 Min 0.053 0.004 0.013 0.007 0.189 0.150 0.228 0.016 SOIC 8 Inches Max 0.069 0.010 SIDE VIEW 1 2 3 4 H Pin 1 Marking E 0.020 0.010 0.197 0.165 0.244 0.050 C END VIEW SEATING PLANE A A1 B e 1.27 BSC 0.050 BSC 100 pieces* 2500 pieces Controlling dimension: inches L * This is an approximate number which may vary. Package Dimensions for SOIC-8 © 2003 California Micro Devices Corp. All rights reserved. 8 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 10/06/03 CM3400 Mechanical Details (cont’d) MSOP-8 Mechanical Specifications Dimensions for CM3400-00MS devices packaged in an 8-pin MSOP packages are presented below. For complete information on the MSOP-8 package, see the California Micro Devices MSOP Package Information document. Mechanical Package Diagrams TOP VIEW D 8 7 6 5 PACKAGE DIMENSIONS Package Pins Dimensions A A1 B C D E e H L # per tube # per tape and reel 2.90 2.90 4.78 0.52 Millimeters Min 0.87 0.05 0.18 3.10 3.10 4.98 0.54 0.114 0.114 0.188 0.017 Max 1.17 0.25 Min 0.034 0.002 MSOP 8 Inches Max 0.046 0.010 0.007 0.122 0.122 0.196 0.025 SEATING PLANE H Pin 1 Marking E 1 2 3 4 SIDE VIEW 0.30 (typ) 0.012 (typ) A A1 B e END VIEW 0.65 BSC 0.025 BSC 80 pieces* 4000 pieces Controlling dimension: inches C L Package Dimensions for MSOP-8 * This is an approximate amount which may vary. © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 9