CM3400 Micropower, Universal Supply Voltage Supervisor (SVS) Features 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. 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 Applications • • • The user controlled reset threshold is determined by two external resistors as follows: Critical power monitoring Power-up sequencing Memory integrity during "brownouts" 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. Typical Application Circuit Simplified Electrical Schematic VDD 1µA CM3400 R1 Falling Edge Delay SENSE + RESET R2 uP or Memory Control MR - 100K MR VDD RESET VTH SENSE + EN RESET tDELAY RESET - CT 200K GND CT CT GND GND © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 1 CM3400 PACKAGE / PINOUT DIAGRAM Top View Top View N.C. 1 8 VDD SENSE MR 2 7 SENSE 6 RESET CT 3 6 RESET 5 RESET GND 4 5 RESET N.C. 1 8 VDD MR 2 7 CT 3 GND 4 8-pin MSOP 8-pin SOIC Note: This drawing is not to scale. PIN DESCRIPTIONS PIN(S) NAME DESCRIPTION 1 N.C. No connect. 2 MR 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. 3 CT 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. 4 GND 5 RESET 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. 6 RESET Active-high reset output. Inverse of RESET. 7 SENSE 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. 8 VDD 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) Negative reference for all voltages. © 2003 California Micro Devices Corp. All rights reserved. 2 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 10/06/03 CM3400 Ordering Information PART NUMBERING INFORMATION Pins Package Ordering Part Number2 Part Marking 8 MSOP-8 CM3400-00MS 171CMD 8 SOIC-8 CM3400-00SN CMPWR171SN Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER RATING UNITS +1500 V [GND - 0.5] to +6.5 [GND - 0.5] to [VDD + 0.5] V V Storage Temperature Range -40 to +150 °C Operating Temperature Range Ambient -40 to +125 °C ESD Protection (HBM) Pin Voltages VDD, SENSE, MR, CT Inputs RESET, RESET Outputs STANDARD OPERATING CONDITIONS PARAMETER VALUE UNITS 2.5 to 5.5 V SENSE Input 0 to 5.5 V CT Timing Capacitor 0 to 3.3 nF Ambient Operating Temperature Range 0 to +70 °C VDD Supply © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 3 CM3400 Specifications (cont’d) ELECTRICAL OPERATING CHARACTERISTICS1 SYMBOL VTH ISENSE ICT TDELAY PARAMETER CONDITIONS SENSE Threshold Trigger Level MIN TYP MAX UNITS 0.95 1.00 1.05 V 1 µA SENSE Input Bias Current 0.10 0.16 0.25 µA CT not connected (default) 15 25 35 mS CT = 0.1nF 35 55 75 mS CT = 1nF 225 325 425 mS Timing Current Source Timing Capacitor Delay (applies to RESET & RESET outputs) IGND Ground Current No load. 40 70 µA tPHL Propagation Delay When Asserting RESET SENSE < (VTH - 50mV) 0.5 5 µS RESET Pull-up Impedance VDD < 1.0V VDD > 2.5V 100 0.5 500 3 kΩ kΩ 0.5 3 kΩ 200 0.5 500 3 kΩ kΩ 0.5 3 kΩ 2 5 µA RESET Pin RPULLUP RPULLDOWN RESET Pull-down Impedance RESET Pin RPULLDOWN RPULLUP RESET Pull-down Impedance VDD < 1.0V VDD > 2.5V RESET Pull-up Impedance MR Pin IMR Internal Pull-up Current 0.5 VIH MR High Detect Input Level 1.5 VIL MR Low Detect Input Level tMR Propagation Delay V 0.3 V 2 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 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ 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 RESET Comparator Response With Overdrive 1100 4 RESPONSE [us] THRESHOLD [mV] 1000 900 800 700 600 500 2.0 2.5 3.0 3.5 4.0 4.5 3 2 1 0 5.0 0 SUPPLY VOLTAGE [V] 50 100 OVERDRIVE [mV] 150 200 Timeout Delay With CT Capacitance TIMEOUT DELAY [ms] 1000 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 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 5 CM3400 Performance Information (cont’d) CM3400 Typical DC Characteristics (nominal conditions unless specified otherwise) Ground Current vs. Supply 2.5 50 2.0 40 GROUND CURRENT [uA] SENSE CURRENT [nA] Sense Input Current vs. Voltage 1.5 1.0 0.5 30 20 10 0.0 0 1 2 3 4 0 5 0 SENSE VOLTAGE [V] 1 RESET Pull-down Drive Resistance 0.5 10 0 PULL UP RESISTANCE [kΩ ] PULL DOWN RESISTANCE [kΩ ] 5 RESET Pull-up Drive Resistance 100 0 10 1 0 0 1 2 SUPPLY VOLTAGE [V] 0.4 0.3 0.2 0.1 0.0 3 2 3 4 5 6 SUPPLY VOLTAGE [V] RESET Pull-down Drive Resistance RESET Pull-down Drive Resistance 0.7 DRIVE RESISTANCE [kΩ] 100 0 PULL UP RESISTANCE [kΩ] 2 3 4 SU PPL Y VOL TAGE [V] 10 0 10 1 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 0 1 2 SUPPLY VOLTAGE [V] 3 2 3 4 5 6 SUPPLY VOLTAGE [V] © 2003 California Micro Devices Corp. All rights reserved. 6 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 10/06/03 CM3400 Performance Information (cont’d) CM3400 Typical Thermal Characteristics (nominal conditions unless specified otherwise) RESET Release Delay (default) vs. Temperature 30 220 215 210 TIMEOUT DELAY [ms] tPHL - Reset Propogation Delay [ns ] RESET Propagation Delay vs. Temperature 205 200 195 190 28 25 23 185 20 180 25 50 75 100 Temperat ure [oC] 25 125 75 1 00 1 25 TEMPERATUR E [oC] Ground Current vs. Temperature SENSE Threshold vs. Temperature 10 45 8 Reset Threshold Change [mV] 50 40 35 IGND [uA] 50 30 25 20 15 10 5 0 6 4 2 0 -2 -4 -6 -8 -10 25 50 75 100 Temperature [oC] 125 25 50 75 100 Temperatu re [oC] 125 © 2003 California Micro Devices Corp. All rights reserved. 10/06/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ 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. Mechanical Package Diagrams For complete information on the SOIC-8 package, see the California Micro Devices SOIC Package Information document. TOP VIEW D 8 7 6 5 PACKAGE DIMENSIONS Package SOIC Pins 8 Dimensions H Millimeters Pin 1 Marking E Inches Min Max Min Max A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.004 0.010 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 1 2 3 4 SIDE VIEW E e 3.80 4.19 0.150 1.27 BSC A A1 SEATING PLANE B 0.165 e 0.050 BSC H 5.80 6.20 0.228 0.244 L 0.40 1.27 0.016 0.050 # per tube 100 pieces* # per tape and reel 2500 pieces Controlling dimension: inches END VIEW C 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 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ 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. Mechanical Package Diagrams TOP VIEW For complete information on the MSOP-8 package, see the California Micro Devices MSOP Package Information document. D 8 PACKAGE DIMENSIONS Package MSOP Pins 8 Dimensions 6 5 E H Pin 1 Marking Millimeters Inches Min Max Min Max A 0.87 1.17 0.034 0.046 A1 0.05 0.25 0.002 0.010 B 0.30 (typ) 0.012 (typ) C 0.18 0.007 2.90 3.10 0.114 0.122 E 2.90 3.10 0.114 0.122 0.65 BSC 1 2 3 4 SIDE VIEW A D e 7 SEATING PLANE A1 B e 0.025 BSC H 4.78 4.98 0.188 0.196 L 0.52 0.54 0.017 0.025 # per tube 80 pieces* # per tape and reel 4000 pieces END VIEW C L Controlling dimension: inches 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 ▲ Tel: 408.263.3214 ▲ Fax: 408.263.7846 ▲ www.calmicro.com 9