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| 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 460ms (max.) Low quiescent current (40A typ.) No external components required 3-pin SOT23 package "809" compatible pinout Lead-free versions available 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 housed in a 3-pin SOT23 package and is available with optional lead-free finishing. Applications * * * Critical P and C power monitoring PCI applications Memory integrity during "brownouts" Typical Application Circuit Simplified Electrical Schematic VIN CM3403 VCC Microprocessor VCC + RESET GND RESET GND GND Rising Edge Delay RESET RPULLDOWN VCC Threshold Reference (c) 2004 California Micro Devices Corp. All rights reserved. 10/29/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 1 CM3403 PACKAGE / PINOUT DIAGRAM Top View GND 1 17xx RESET 2 3 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 becomes inactive. During a "brownout" condition, RESET will immediately become 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/SO) or 4.63 (CM3403-46ST/SO) reference to determine the state of the output. 3 VCC Ordering Information PART NUMBERING INFORMATION Standard Finish Pins 3 3 Threshold Voltage 2.93V 4.63V Package SOT23-3 SOT23-3 Ordering Part Number1 CM3403-29ST CM3403-46ST Part Marking 172Y 174Y Lead-free Finish Ordering Part Number1 CM3403-29SO CM3403-46SO Part Marking 172R 174R Note 1: Parts are shipped in Tape & Reel form unless otherwise specified. (c) 2004 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 10/29/04 CM3403 Specifications ABSOLUTE MAXIMUM RATINGS PARAMETER Pin Voltages VCC RESET Storage Temperature Range Operating Temperature Range Ambient RATING [GND - 0.5] to +6.5 [GND - 0.5] to [VCC + 0.5] -40 to +150 -40 to +125 UNITS 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 CHARACTERISTICS (SEE NOTE 1) 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 Resistance RESET Pull-Up Resistance VCC < (VTH - 50mV) VCC > 1.5V VCC > VTH and t > TDELAY No load, VCC=5V 140 0.2 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 80 460 5 3 3 UNITS V V V V A mS S k k Note 1: Electrical Operating Characteristics are specified over the Standard Operating Conditions unless specified otherwise. (c) 2004 California Micro Devices Corp. All rights reserved. 10/29/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 3 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) 2004 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 10/29/04 CM3403 Performance Information (cont'd) CM3403 Typical Thermal Characteristics (nominal conditions unless specified otherwise) RESET Propagation Delay vs. Temperature tPHL - Reset Propogation Delay [ns] TDELAY - Reset Release Delay [ms] RESET Release Delay vs. Temperature 600 550 500 450 400 350 300 25 50 75 Temperature [ C] o 220 215 210 205 200 195 190 185 180 25 50 75 100 Temperature [oC] 125 100 125 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) 2004 California Micro Devices Corp. All rights reserved. 10/29/04 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 Tel: 408.263.3214 Fax: 408.263.7846 www.calmicro.com 5 CM3403 Mechanical Details SOT23-3 Mechanical Specifications Dimensions for CM3403 devices packaged in 3-lead 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 E1 E PACKAGE DIMENSIONS Package JEDEC No. Pins/Leads 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 TO-236 (Var. AB) 3 Inches Max 0.0441 0.0039 0.0197 0.0079 0.1197 0.1039 0.0551 1 2 e e1 SIDE VIEW D A1 A END VIEW 0.95 BSC 1.90 BSC 0.40 0.60 0.54 REF 0.0374 BSC 0.0748 BSC 0.0157 0.0236 c L1 L 0.0213 REF 3000 pieces Controlling dimension: millimeters Package Dimensions for SOT23-3. (c) 2004 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 10/29/04 |
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