| Compare | Image | Name | Manufacturer | Pricing(USD) | Quantity | Weight(Kg) | Size(LxWxH) | Part Status | Type | Mount | Mounting Type | Operating Temperature | Packaging | Moisture Sensitivity Level (MSL) | Max Operating Temperature | Min Operating Temperature | Technology | Height Seated (Max) | RoHS Status | Published | Datasheet | Package / Case | Length | Number of Terminations | Factory Lead Time | ECCN Code | Number of Functions | Terminal Finish | Terminal Position | Terminal Form | Peak Reflow Temperature (Cel) | Supply Voltage | Terminal Pitch | Supply Voltage-Max (Vsup) | Supply Voltage-Min (Vsup) | Number of Channels | Time@Peak Reflow Temperature-Max (s) | Adjustable Threshold | Subcategory | Qualification Status | JESD-30 Code | Supplier Device Package | Reset | Reset Timeout | Number of Voltages Monitored | Output | Voltage - Threshold |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| XC6123C248MG-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | SC-74A, SOT-753 | 10 Weeks | SOT-25 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||||||||
| XC6124D548ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 400ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6122A247MG-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | SC-74A, SOT-753 | 10 Weeks | SOT-25 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.7V | |||||||||||||||||||||||
| XC6124F547ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 400ms Typical | 1 | Open Drain or Open Collector | 4.7V | ||||||
| XC6124D748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6121E448ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 200ms Typical | 1 | Open Drain or Open Collector | 4.8V | ||||||
| XC6122C448ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 200ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124A748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124A248MG-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | SC-74A, SOT-753 | 10 Weeks | SOT-25 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||||||||
| XC6121D748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | /files/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | ||||||
| XC6121D348ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 10 Weeks | 6-USPC (1.8x2) | Active Low | 100ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||||||||
| XC6122C648ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 1.6s Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6123C348ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 100ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6121C248MG-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | SC-74A, SOT-753 | 10 Weeks | SOT-25 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||||||||
| XC6123D648ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 1.6s Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124A648ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 1.6s Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124D348ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 100ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6121A248MG-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | 85°C | -40°C | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | SC-74A, SOT-753 | 10 Weeks | SOT-25 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||||||||
| XC6124C248ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 50ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6123E447ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 200ms Typical | 1 | Open Drain or Open Collector | 4.7V | |||||||||||||||||
| XC6121C748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | ||||||
| XC6122D548ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 400ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6121E748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | ||||||
| XC6121D648ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 2mm | 6 | 10 Weeks | EAR99 | 1 | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 260 | 2V | 0.5mm | 6V | 1V | 1 | 10 | NO | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 1.6s Typical | 1 | Open Drain or Open Collector | 4.8V | ||||||
| XC6123D748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6122A548ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 400ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6122D348ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 100ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124C548ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 400ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6123A448ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 200ms Typical | 1 | Open Drain or Open Collector | 4.8V | |||||||||||||||||
| XC6124C748ER-G | Torex Semiconductor Ltd |
Min: 1 Mult: 1 |
0 | 0x0x0 | download | Watchdog Circuit | Surface Mount | Surface Mount | -40°C~85°C TA | Tape & Reel (TR) | 1 (Unlimited) | CMOS | ROHS3 Compliant | 2014 | https://pdf.utmel.com/r/datasheets/torexsemiconductorltd-xc6121e616erg-datasheets-1887.pdf | 6-UFDFN Exposed Pad | 6 | 10 Weeks | Nickel/Silver/Gold (Ni/Ag/Au) | DUAL | NO LEAD | 0.5mm | Power Management Circuits | Not Qualified | R-PDSO-N6 | Active Low | 800ms Typical | 1 | Open Drain or Open Collector | 4.8V |
Please send RFQ , we will respond immediately.