| Compare | Image | Name | Manufacturer | Pricing(USD) | Quantity | Weight(Kg) | Size(LxWxH) | Part Status | Type | Packaging | Moisture Sensitivity Level (MSL) | Technology | Height Seated (Max) | RoHS Status | Datasheet | Package / Case | Length | Width | Lead Free | Number of Terminations | Factory Lead Time | Pbfree Code | ECCN Code | Additional Feature | HTS Code | Number of Functions | JESD-609 Code | Terminal Finish | Surface Mount | Terminal Position | Terminal Form | Peak Reflow Temperature (Cel) | Supply Voltage | Terminal Pitch | Pin Count | Temperature Grade | Operating Temperature (Max) | Operating Temperature (Min) | Supply Voltage-Max (Vsup) | Supply Voltage-Min (Vsup) | Number of Channels | Analog IC - Other Type | Time@Peak Reflow Temperature-Max (s) | Adjustable Threshold | Subcategory | Power Supplies | Supply Current-Max (Isup) | Qualification Status | JESD-30 Code | Output Voltage | Number of Outputs | Threshold Voltage | Watchdog Timer | Output Voltage 1 | Output Voltage 2 | Input Voltage (Min) | Input Voltage (Max) | Regulator Type | Output Voltage Accuracy | Dropout Voltage1-Max | Output Voltage1-Max | Output Voltage1-Min | Output Current1-Max | Output Voltage2-Max | Output Voltage2-Min | Operating Temperature TJ-Max | Output Current2-Max | Dropout Voltage2-Max |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R3111Q311A-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Active | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3111n271ctrfe-datasheets-0416.pdf | Lead Free | 9 Weeks | No | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RP111L311D-TR | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp111n331btrfe-datasheets-4486.pdf | 9 Weeks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3111Q471A-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3111n271ctrfe-datasheets-0416.pdf | 2mm | 1.25mm | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 4.7V | 8542.39.00.01 | 1 | e3 | Tin (Sn) | YES | DUAL | GULL WING | 260 | 12V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 10V | 0.7V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G4 | ||||||||||||||||||||||||||||||
| RP112N151B-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp112k181dtr-datasheets-1039.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | 260 | 0.95mm | 5 | NOT SPECIFIED | Not Qualified | R-PDSO-G5 | 1.5V | 2V | 5.25V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 0.5V | 1.53V | 1.47V | 0.15A | ||||||||||||||||||||||||||||||||
| R3111N312C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.4mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3111n271ctrfe-datasheets-0416.pdf | 2.9mm | 1.6mm | 3 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 3.1V | 8542.39.00.01 | 1 | e3 | Tin (Sn) | YES | DUAL | GULL WING | 260 | 12V | 0.95mm | 3 | INDUSTRIAL | 85°C | -40°C | 10V | 0.7V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G3 | ||||||||||||||||||||||||||||||
| RP112N281D-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp112k181dtr-datasheets-1039.pdf | Lead Free | 9 Weeks | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3114N221C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3114n071ctrfe-datasheets-0250.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 2.2V | 8542.39.00.01 | 1 | e4 | Gold (Au) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 0.95mm | 5 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | NO | Not Qualified | R-PDSO-G5 | ||||||||||||||||||||||||||||||
| RP112Q302D-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.1mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp112k181dtr-datasheets-1039.pdf | 2mm | 1.25mm | Lead Free | 5 | 9 Weeks | yes | EAR99 | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | 260 | 0.65mm | 5 | NOT SPECIFIED | Not Qualified | R-PDSO-G5 | 3V | 2V | 5.25V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 0.28V | 3.045V | 2.955V | 0.15A | |||||||||||||||||||||||||||||||
| R3114N351A-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3114n071ctrfe-datasheets-0250.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 3.5V | 8542.39.00.01 | 1 | e4 | Gold (Au) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 0.95mm | 5 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | NO | Not Qualified | R-PDSO-G5 | ||||||||||||||||||||||||||||||
| RP112N201D-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp112k181dtr-datasheets-1039.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | 260 | 0.95mm | 5 | NOT SPECIFIED | Not Qualified | R-PDSO-G5 | 2V | 2V | 5.25V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 0.36V | 2.03V | 1.97V | 0.15A | ||||||||||||||||||||||||||||||||
| R3114N491C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3114n071ctrfe-datasheets-0250.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 4.9V | 8542.39.00.01 | 1 | e4 | Gold (Au) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 0.95mm | 5 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | NO | Not Qualified | R-PDSO-G5 | ||||||||||||||||||||||||||||||
| RP115L111D-E2 | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp115l181be2-datasheets-3939.pdf | 9 Weeks | EAR99 | 8542.39.00.01 | e4 | Palladium (Pd) | NOT SPECIFIED | NOT SPECIFIED | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3114N181A-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3114n071ctrfe-datasheets-0250.pdf | 9 Weeks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RP115L331B-E2 | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp115l181be2-datasheets-3939.pdf | 9 Weeks | EAR99 | 8542.39.00.01 | e4 | Palladium (Pd) | NOT SPECIFIED | NOT SPECIFIED | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3116Q071A-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3116n271atrfe-datasheets-0950.pdf | 2mm | 1.25mm | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 0.7V | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G4 | ||||||||||||||||||||||||||||||
| RP115L431B-E2 | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp115l181be2-datasheets-3939.pdf | 9 Weeks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3116Q231C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3116n271atrfe-datasheets-0950.pdf | 2mm | 1.25mm | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 2.3V | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G4 | ||||||||||||||||||||||||||||||
| RH5RZ27CA-T1-FE | RICOH Electronic Devices Co., LTD. | $1.02 |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.6mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rh5rz33cat1fe-datasheets-6103.pdf | 4.5mm | 2.5mm | 3 | 9 Weeks | EAR99 | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | SINGLE | FLAT | NOT SPECIFIED | 1.5mm | 3 | NOT SPECIFIED | R-PSSO-F3 | 2.7V | 8V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 2.754V | 2.646V | 0.1A | |||||||||||||||||||||||||||||||||||
| R3116Q151C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3116n271atrfe-datasheets-0950.pdf | 9 Weeks | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RP132H121B-T1-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | 1.6mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp132k331btr-datasheets-2350.pdf | SOT-89-5 | 4.5mm | 2.5mm | Lead Free | 5 | 9 Weeks | yes | EAR99 | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | FLAT | 260 | 1.5mm | 5 | NOT SPECIFIED | R-PDSO-F5 | 1.2V | 1.2V | 1.4V | 6.5V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 1 % | 1.23V | 1A | ||||||||||||||||||||||||||||||||
| R3116Q111A-TR-FE | RICOH Electronic Devices Co., LTD. | $0.37 |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3116n271atrfe-datasheets-0950.pdf | 2mm | 1.25mm | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 1.1V | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G4 | |||||||||||||||||||||||||||||
| R5326K012B-TR | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r5326k002btr-datasheets-5307.pdf | 2mm | 1.8mm | 6 | 9 Weeks | no | EAR99 | 8542.39.00.01 | 1 | e4 | Gold (Au) | YES | DUAL | NO LEAD | NOT SPECIFIED | 0.5mm | 6 | NOT SPECIFIED | Not Qualified | R-XDSO-N6 | 2 | 1.1V | 1.3V | 1.4V | 6V | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR | 0.69V | 1.115V | 1.085V | 0.15A | 1.315V | 1.285V | 0.15A | 0.59V | ||||||||||||||||||||||||||
| R3132Q18EA-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3132q46ea3trfe-datasheets-3558.pdf | 2mm | 1.25mm | Lead Free | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 1.8V | 8542.39.00.01 | 1 | e3 | Tin (Sn) | YES | DUAL | GULL WING | 260 | 3V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 6V | 0.75V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | NO | Not Qualified | R-PDSO-G4 | |||||||||||||||||||||||||||||
| R5326K021B-TR | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r5326k002btr-datasheets-5307.pdf | 9 Weeks | EAR99 | 8542.39.00.01 | e4 | Gold (Au) | NOT SPECIFIED | NOT SPECIFIED | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR | |||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3116Q461C-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.05mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3116n271atrfe-datasheets-0950.pdf | 2mm | 1.25mm | 4 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 4.6V | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | NOT SPECIFIED | 0.6V | 1.3mm | 4 | INDUSTRIAL | 85°C | -40°C | 6V | 0.5V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | YES | Not Qualified | R-PDSO-G4 | ||||||||||||||||||||||||||||||
| RH5RZ50CA-T1-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rh5rz33cat1fe-datasheets-6103.pdf | SOT-89 | Lead Free | 9 Weeks | 5V | 2 % | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| R3134N46EA3-TR-FE | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 1.3mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3133d27ectrfe-datasheets-3767.pdf | 2.9mm | 1.6mm | 5 | 9 Weeks | yes | EAR99 | DETECTOR THRESHOLD VOLTAGE IS 4.63V | 8542.39.00.01 | 1 | e3 | Matte Tin (Sn) | YES | DUAL | GULL WING | 260 | 0.95mm | 5 | INDUSTRIAL | 85°C | -40°C | 6V | 0.75V | 1 | POWER SUPPLY SUPPORT CIRCUIT | NOT SPECIFIED | NO | Power Management Circuits | 0.75/6V | 0.0036mA | Not Qualified | R-PDSO-G5 | +4.63V | |||||||||||||||||||||||||||
| RP200K211D-TR | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.4mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp200n121dtrfe-datasheets-0414.pdf | 1.2mm | 1.2mm | 6 | 9 Weeks | yes | EAR99 | 8542.39.00.01 | 1 | e4 | Gold (Au) | YES | DUAL | NO LEAD | NOT SPECIFIED | 0.4mm | 6 | NOT SPECIFIED | Not Qualified | S-XDSO-N6 | 2.1V | 1.4V | 5.25V | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | 0.5V | |||||||||||||||||||||||||||||||||||
| R3134N32EC-TR-FE | RICOH Electronic Devices Co., LTD. | $0.43 |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-r3133d27ectrfe-datasheets-3767.pdf | 9 Weeks | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| RP150K004B-TR | RICOH Electronic Devices Co., LTD. |
Min: 1 Mult: 1 |
download | Tape & Reel (TR) | 1 (Unlimited) | CMOS | 0.6mm | RoHS Compliant | https://pdf.utmel.com/r/datasheets/ricohelectronicdevicescoltd-rp150k002btr-datasheets-5406.pdf | 2mm | 2mm | 8 | 9 Weeks | no | EAR99 | 8542.39.00.01 | 1 | e4 | GOLD | YES | DUAL | NO LEAD | NOT SPECIFIED | 0.5mm | 8 | NOT SPECIFIED | Not Qualified | S-XDSO-N8 | 2 | 2.5V | 1.8V | 2.5V | 5V | FIXED POSITIVE MULTIPLE OUTPUT LDO REGULATOR | 0.38V | 2.525V | 2.475V | 0.3A | 2V | 1.6V | 125°C | 0.3A | 0.8V |
Please send RFQ , we will respond immediately.