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| PRELIMINARY CM3403 Micropower Supply Voltage Supervisor (SVS) Features * * * * * * * * * Precision voltage sensor Two threshold options: 2.93V or 4.63V Stable over temperature Valid output logic while VCC = 0V. Power-on reset pulse width of 140ms/min. to 560ms/max. Low quiescent current (40A typ.) No external components required 3-pin SOT23 package "809" compatible pinout Product Description The CM3403 is a micropower low voltage supply supervisor designed to provide the necessary poweron reset control for microprocessors and memory applications. An internal pull-down resistor on the RESET output ensures the output remains valid under all supply conditions. During either a cold-start power-up or a complete power-down sequence, the RESET output will remain at 0V while the VCC input voltage is between the threshold level and ground. When the VCC input exceeds the preset threshold voltage, an internal timer is triggered and the RESET output remains active for a minimum of 140ms, at which point the output is taken inactive. In the event of a "brown-out" condition and the VCC voltage collapses below the threshold the RESET output is immediately asserted. Both the trigger threshold and the precision delay pulse are internally controlled eliminating the requirement for external components. The CM3403 is available in a 3-pin SOT23 package. Applications * * * Critical P and C power monitoring PCI applications Memory integrity during "brownouts" Typical Application Circuit Simplified Electrical Schematic VIN CM3403 Microprocessor VCC + VCC RESET GND RESET GND GND Rising Edge Delay RESET Rpulldown 200K VCC Threshold Reference (c) 2003 California Micro Devices Corp. All rights reserved. 03/17/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 1 PRELIMINARY CM3403 PACKAGE / PINOUT DIAGRAM Top View GND 1 3 RESET 2 VCC 3-pin SOT23 Note: This drawing is not to scale. PIN DESCRIPTIONS PIN(S) 1 2 NAME GND RESET DESCRIPTION Negative reference for all signals. Active low reset output. When the sense threshold has been exceeded, the RESET signal will remain active for an additional 140ms (min.) after which it is taken inactive. During a "brownout" condition, RESET will immediately be taken active. Internal circuitry ensures RESET will remain active even when the supply voltage is as low as 0V. Supply input signal which is monitored by the sense comparator. This input is compared to the 2.93V (CM3403-29ST) or 4.63 (CM3403-46ST) reference to determine the state of the output. 3 VCC Ordering Information PART NUMBERING INFORMATION Pins 3 3 Threshold Voltage 2.93V 4.63V Package SOT-23 SOT-23 Ordering Part Number2 CM3403-29ST CM3403-46ST Part Marking 172Y 174Y Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. (c) 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 03/17/03 PRELIMINARY CM3403 Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER ESD Protection (HBM) Pin Voltages VCC RESET Storage Temperature Range Operating Temperature Range Ambient RATING +1500 [GND - 0.5] to +6.5 [GND - 0.5] to [VCC + 0.5] -40 to +150 -40 to +125 UNITS V V V C C STANDARD OPERATING CONDITIONS PARAMETER VCC Ambient Operating Temperature Range VALUE 0 to 6.0 0 to +70 UNITS V C ELECTRICAL OPERATING CHARACTERISTICS1 SYMBOL VTH PARAMETER Sense Threshold CONDITIONS CM3403-29, TA=25C CM3403-29 CM3403-46, TA=25C CM3403-46 ICC TDELAY tPHL RPULLDOWN RPULLUP Supply Current Reset Release Delay Propagation Delay when asserting RESET RESET Pull-Down Impedance RESET Pull-Up Impedance VCC < (V TH - 50mV) VCC < 1.5V VCC > 1.5V No load, VCC=5V 140 0.2 200 0.5 0.5 MIN 2.89 2.85 4.56 4.5 TYP 2.93 2.93 4.63 4.63 40 MAX 2.96 3.00 4.7 4.75 80 560 5 500 3 3 UNITS V V V V A mS S k k k Note 1: Electrical Operating Characteristics are specified over the Standard Operating Conditions unless specified otherwise. (c) 2003 California Micro Devices Corp. All rights reserved. 03/17/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 3 PRELIMINARY CM3403 Performance Information CM3403 Typical Characteristics (nominal conditions unless specified otherwise) Reset Response with Overdrive 4 GROUND CURRENT [uA] Ground Current vs. Voltage 50 40 30 20 10 0 Transient Duration [us] 3 2 1 0 0 50 100 150 Reset Threshold Overdrive [mV] 200 0 1 2 3 4 5 SUPPLY VOLTAGE [V] Below Trigger RESET* Pull-down 1000 PULL DOWN RESISTANCE [k ] PULL UP RESISTANCE [k] Above Trigger RESET* Pull-up 0.6 0.5 0.4 0.3 0.2 0.1 0.0 100 10 1 0 0 1 2 SUPPLY VOLTAGE [V] 3 2 3 4 SUPPLY VOLTAGE [V] 5 6 (c) 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 03/17/03 PRELIMINARY CM3403 Performance Information (cont'd) CM3403 Typical Thermal Characteristics (nominal conditions unless specified otherwise) RESET Propagation Delay vs. Temperature tPHL - Reset Propogation Delay [ns] 215 210 205 200 195 190 185 180 25 50 75 100 Temperature [oC] 125 TDELAY - Reset Release Delay [ms] RESET Release Delay vs. Temperature 600 550 500 450 400 350 300 25 50 75 Temperature [ C] o 220 100 125 Ground Current vs. Temperature 40 Reset Threshold Change [mV] Threshold variation vs. Temperature 20 15 10 5 0 -5 -10 -15 -20 35 30 IGND [uA] 25 20 15 10 5 0 25 50 75 100 Temperature [ oC] 125 25 50 75 100 Temperature [oC] 125 (c) 2003 California Micro Devices Corp. All rights reserved. 03/17/03 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 L Tel: 408.263.3214 L Fax: 408.263.7846 L www.calmicro.com 5 PRELIMINARY CM3403 Mechanical Details SOT23-3 Mechanical Specifications Dimensions for CM3403 devices packaged in 3-pin SOT23 packages are presented below. For complete information on the SOT23-3 package, see the California Micro Devices SOT23 Package Information document. Mechanical Package Diagrams TOP VIEW b 3 xxxx PACKAGE DIMENSIONS Package Pins Dimensions A A1 b c D E E1 e e1 L L1 # per tape and reel Millimeters Min 0.89 0.01 0.30 0.08 2.80 2.10 1.20 Max 1.12 0.10 0.50 0.20 3.04 2.64 1.40 Min 0.0350 0.0004 0.0118 0.0031 0.1102 0.0827 0.0472 SOT23-3 (JEDEC name is TO-236) 3 Inches Max 0.0441 0.0039 0.0197 0.0079 0.1197 0.1039 0.0551 END VIEW D SIDE VIEW e1 e 1 2 E1 E A1 A 0.95 BSC 1.90 BSC 0.40 0.60 0.54 REF 0.0374 BSC 0.0748 BSC 0.0157 0.0236 c 0.0213 REF 3000 pieces L1 L Controlling dimension: millimeters Package Dimensions for SOT23-3. (c) 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 03/17/03 |
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