MIC6315-31D2UTR

MIC6315 Open-Drain Microprocessor Reset Circuit Features General Description • Precision Voltage Monitor for 3V, 3.3V, or 5V Power Supplies • /RESET Remains Valid with VCC as Low as 1V • 5 µA Supply Current • 20 ms, 140 ms, or 1100 ms Minimum Reset Pulse Widths Available • Manual Reset Input • Available in 4-Pin SOT-143 Package The MIC6315 is an inexpensive reset generator circuit that monitors power supplies in microprocessor-based systems. Applications • • • • • Portable Equipment Intelligent Instruments Critical Microprocessor Power Monitoring Printers/Computers Embedded Controllers The function of this device is to assert a reset if either the power supply drops below a designated reset threshold level or /MR is forced low. Several different reset threshold levels are available to accommodate 3V, 3.3V, or 5V powered systems. The MIC6315 has an active low, open-drain /RESET output. The reset output remains asserted for a minimum of either 20 ms, 140 ms, or 1100 ms after VCC has risen above the designed reset threshold level. The MIC6315 is available in a 4-pin SOT-143 package. Package Type MIC6315 4-Lead SOT-143 (U) (Top View)  2021 - 2022 Microchip Technology Inc. DS20006450B-page 1 MIC6315 Typical Application Circuit Functional Block Diagram DS20006450B-page 2  2021 - 2022 Microchip Technology Inc. MIC6315 1.0 ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings † Terminal Voltage (VCC, /RESET) ........................................................................................................................... –0.3V to +6.0V (/MR) ................................................................................................................................ –0.3V to (VCC + 0.3V) Rate of Rise (VCC) .............................................................................................................................................. 100V/µs Input Current (VCC, /MR)........................................................................................................................................20 mA Output Current (/RESET) ........................................................................................................................................20 mA ESD Rating (Note 1) .................................................................................................................................................. 3 kV Operating Ratings ‡ Input Voltage (/RESET)...............................................................................................................................GND to +5.5V Power Dissipation (TA = +70°C)...........................................................................................................................320 mW † Notice: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational sections of this specification is not intended. Exposure to maximum rating conditions for extended periods may affect device reliability. ‡ Notice: The device is not guaranteed to function outside its operating ratings. Note 1: Devices are ESD sensitive. Handling precautions are recommended. Human body model, 1.5 kΩ in series with 100 pF. ELECTRICAL CHARACTERISTICS Electrical Characteristics: For typical values, VCC = 2.5V to 5.5V; TA = +25°C, bold values valid for –40°C ≤ TA ≤ +85°C, unless noted. Parameter Symbol Min. Typ. Max. Units Operating Voltage Range VCC 1 — 5.5 V Supply Current ICC — 5 15 — 5 10 Reset Voltage Threshold VTH VTH – 2.5% VTH VTH + 2.5% 20 28 44 140 200 320 1100 1500 2500 — — 0.4 — — 0.3 — — 0.3 Reset Timeout Period /RESET Output Voltage tRST VOL µA V Conditions — VCC = 5.5V, no load VCC = 3.6V, no load Note 1 D2U ms D3U D4U VCC ≥ 4.0V, ISNK = 3.2 mA V VCC ≥ 2.5V, ISNK = 1.2 mA VCC ≥ 1.0V, ISNK = 50 µA /RESET Output Leakage — — — 1 µA /RESET deasserted /MR Minimum Pulse Width — 10 — — µs — /MR-to-Reset Delay — — 0.5 — µs — /MR Input Threshold VIH 2.3 — — 0.7 x VCC — — Note 1: V VTH > 4.0V VTH < 4.0V Various reset thresholds available. See the Product Identification System section or contact Microchip.  2021 - 2022 Microchip Technology Inc. DS20006450B-page 3 MIC6315 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Characteristics: For typical values, VCC = 2.5V to 5.5V; TA = +25°C, bold values valid for –40°C ≤ TA ≤ +85°C, unless noted. Parameter Symbol Min. Typ. Max. — — 0.8 — — 0.25 x VCC Units Conditions VTH > 4.0V /MR Input Threshold VIL /MR Pull-Up Resistance — 10 20 30 kΩ — /MR Glitch Immunity — — 100 — ns — Note 1: V VTH < 4.0V Various reset thresholds available. See the Product Identification System section or contact Microchip. TEMPERATURE SPECIFICATIONS Parameters Sym. Min. Typ. Max. Units Conditions Junction Temperature Range TJ –40 — +125 °C Operating Temperature Range TA –40 — +85 °C — Storage Temperature Range TS –65 — +150 °C — Lead Temperature — — — +300 °C Soldering, 10 sec. Temperature Ranges Note 1: Note 1 The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction to air (i.e., TA, TJ, JA). Exceeding the maximum allowable power dissipation will cause the device operating junction temperature to exceed the maximum +125°C rating. Sustained junction temperatures above +125°C can impact the device reliability. Timing Diagram DS20006450B-page 4  2021 - 2022 Microchip Technology Inc. MIC6315 2.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin Number Pin Name Description 1 GND 2 /RESET /RESET goes low if VCC falls below the reset threshold and remains asserted for one reset timeout period after VCC exceeds the reset threshold. 3 /MR Manual Reset Input: A logic LOW on /MR forces a reset. The reset will remain asserted as long as /MR is held LOW and for one reset timeout period after /MR goes HIGH. This input can be shorted to ground via a switch or be driven by TTL or CMOS logic. Float if unused. 4 VCC Power supply input. IC Ground.  2021 - 2022 Microchip Technology Inc. DS20006450B-page 5 MIC6315 3.0 APPLICATION INFORMATION 3.1 Microprocessor Reset The /RESET pin is asserted whenever VCC falls below the reset threshold voltage or if /MR (manual reset) is forced low. The /RESET pin remains asserted for the duration of the reset timeout period after VCC has risen above the reset threshold or /MR has returned high. The reset function ensures the microprocessor is properly reset and powers up in a known condition after a power failure. /RESET will remain valid with VCC as low as 1V. The /RESET output is a simple open-drain N-channel MOSFET structure. A pull-up resistor must be used to pull this output up to some voltage. For most applications, this voltage will be the same power supply that supplies VCC to the MIC6315. I 3.3 Wire OR’ing the /RESET Output Because the RESET output is open-drain, several reset sources can be wire-OR’ed, in parallel, to allow resets from multiple sources. 3.4 VCC Transients The MIC6315 is relatively immune to negative-going VCC glitches below the reset threshold. Typically, a negative-going transient 125 mV below the reset threshold with duration of 20 μs or less will not cause an unwanted reset. If additional transient immunity is needed, a bypass capacitor can be placed a close as possible to the MIC6315. t is possible, however, to tie this resistor to some other voltage. This will allow the MIC6315 to monitor one voltage while level-shifting the /RESET output to some other voltage. The pull-up voltage must be limited to 6.0V or less (absolute maximum) to avoid damage to the MIC6315. The resistor must be small enough to supply current to the inputs and leakage paths that are driven by the /RESET output. 3.2 /RESET Valid at Low Voltage As VCC drops to 0V, the MIC6315 will no longer be able to pull the /RESET output low. At this point, the pull-up resistor will pull the output high. The value of the pull-up resistor and the voltage it is connected to will affect the point at which this happens. DS20006450B-page 6 FIGURE 3-1: MIC6315 as Used in a Multiple Supply System.  2021 - 2022 Microchip Technology Inc. MIC6315 4.0 PACKAGING INFORMATION 4.1 Package Marking Information 4-Lead SOT-143* (front) XX NW 4-Lead SOT-143* (back) MNNN Legend: XX...X Y YY WW NNN e3 * Example Example 9016 Product code or customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week ‘01’) Alphanumeric traceability code Pb-free JEDEC® designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package. ●, ▲, ▼ Pin one index is identified by a dot, delta up, or delta down (triangle mark). Note: In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. Package may or may not include the corporate logo. Underbar (_) and/or Overbar (‾) symbol may not be to scale. Note: If the full seven-character YYWWNNN code cannot fit on the package, the following truncated codes are used based on the available marking space: 6 Characters = YWWNNN; 5 Characters = WWNNN; 4 Characters = WNNN; 3 Characters = NNN; 2 Characters = NN; 1 Character = N  2021 - 2022 Microchip Technology Inc. DS20006450B-page 7 MIC6315 TABLE 4-1: MARKING CODES Part Number Marking Code Nominal VTH Minimum tRST MIC6315-26D2UY NY 2.63V 20 ms MIC6315-29D2UY NM 2.93V 20 ms MIC6315-30D2UY N2 3.00V 20 ms MIC6315-31D2UY NF 3.08V 20 ms MIC6315-40D2UY NW 4.00V 20 ms MIC6315-41D2UY N6 4.10V 20 ms MIC6315-44D2UY NG 4.38V 20 ms MIC6315-46D2UY NQ 4.63V 20 ms MIC6315-26D3UY NR 2.63V 140 ms MIC6315-26D3UY NP 2.93V 140 ms MIC6315-30D3UY N3 3.00V 140 ms MIC6315-31D3UY NU 3.08V 140 ms MIC6315-40D3UY N8 4.00V 140 ms MIC6315-41D3UY N5 4.10V 140 ms MIC6315-42D3UY 05 4.20V 140 ms MIC6315-44D3UY NH 4.38V 140 ms MIC6315-46D3UY NX 4.63V 140 ms MIC6315-26D4UY NS 2.63V 1100 ms MIC6315-29D4UY NN 2.93V 1100 ms MIC6315-30D4UY N4 3.00V 1100 ms MIC6315-31D4UY 2N 3.08V 1100 ms MIC6315-40D4UY M9 4.00V 1100 ms MIC6315-41D4UY M7 4.10V 1100 ms MIC6315-44D4UY NJ 4.38V 1100 ms MIC6315-46D4UY NZ 4.63V 1100 ms DS20006450B-page 8  2021 - 2022 Microchip Technology Inc. MIC6315 4-Lead SOT-143 Package Outline and Recommended Land Pattern Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging.  2021 - 2022 Microchip Technology Inc. DS20006450B-page 9 MIC6315 NOTES: DS20006450B-page 10  2021 - 2022 Microchip Technology Inc. MIC6315 APPENDIX A: REVISION HISTORY Revision A (February 2021) • Converted Micrel document MIC6315 to Microchip data sheet template DS20006450A. • Minor grammatical text changes throughout. Revision B (February 2022) • Corrected the device marking specification in 4.1 “Package Marking Information” and added note below the legend there.  2021 - 2022 Microchip Technology Inc. DS20006450B-page 11 MIC6315 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, contact your local Microchip representative or sales office. Device -XX XX X X -XX Part No. Nominal VTH Min. Reset Time Package Temp. Range Media Type Device: MIC6315: Nominal VTH: 26 29 30 31 40 41 42 44 46 = = = = = = = = = 2.63V 2.93V 3.00V 3.08V 4.00V 4.10V 4.20V (D3 Reset Time Only) 4.38V 4.63V Minimum Reset Time: D2 D3 D4 = = = 20 ms 140 ms 1100 ms Package: U = 4-Lead SOT-143 Operating Temp. Range: Y = –40°C to +85°C Media Type: TR = 3000/Reel Open-Drain Microprocessor Reset Circuit Examples: a) MIC6315-26D2UY-TR: MIC6315, 2.63V Nominal VTH 20 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel b) MIC6315-30D3UY-TR: MIC6315, 3.00V Nominal VTH 140 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel c) MIC6315-44D4UY-TR: MIC6315, 4.38V Nominal VTH 1100 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel d) MIC6315-46D2UY-TR: MIC6315, 4.63V Nominal VTH 20 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel e) MIC6315-42D3UY-TR: MIC6315, 4.20V Nominal VTH 140 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel f) MIC6315-29D4UY-TR: MIC6315, 2.93V Nominal VTH 1100 ms Min. Reset Time, 4-Lead SOT-143, –40°C to +85°C Range, 3000/Reel Note 1:  2021 - 2022 Microchip Technology Inc. Tape and Reel identifier only appears in the catalog part number description. This identifier is used for ordering purposes and is not printed on the device package. Check with your Microchip Sales Office for package availability with the Tape and Reel option. DS20006450B-page 13 MIC6315 NOTES: DS20006450B-page 14  2021 - 2022 Microchip Technology Inc. Note the following details of the code protection feature on Microchip products: • Microchip products meet the specifications contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is secure when used in the intended manner, within operating specifications, and under normal conditions. • Microchip values and aggressively protects its intellectual property rights. Attempts to breach the code protection features of Microchip product is strictly prohibited and may violate the Digital Millennium Copyright Act. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of its code. Code protection does not mean that we are guaranteeing the product is “unbreakable”. Code protection is constantly evolving. Microchip is committed to continuously improving the code protection features of our products. This publication and the information herein may be used only with Microchip products, including to design, test, and integrate Microchip products with your application. Use of this information in any other manner violates these terms. Information regarding device applications is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. Contact your local Microchip sales office for additional support or, obtain additional support at https:// www.microchip.com/en-us/support/design-help/client-supportservices. THIS INFORMATION IS PROVIDED BY MICROCHIP "AS IS". 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