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| PartNumber | BD4938FVE-TR | BD4939FVE-TR | BD4938G-TR |
| Description | Supervisory Circuits CMOS DETEC VOLT 4.1V | Supervisory Circuits CMOS DETEC VOLT 4.2V | Supervisory Circuits CMOS DETEC VOLT 3.8V |
| Manufacturer | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Product Category | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| RoHS | Y | Y | Y |
| Type | Voltage Monitors | Voltage Monitors | Voltage Monitors |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | VSOF-5 | VSOF-5 | SSOP-5 |
| Threshold Voltage | 3.8 V | 3.9 V | 3.8 V |
| Number of Inputs Monitored | 1 Input | 1 Input | 1 Input |
| Output Type | CMOS | CMOS | CMOS |
| Manual Reset | No Manual Reset | No Manual Reset | No Manual Reset |
| Watchdog Timers | No Watchdog | No Watchdog | No Watchdog |
| Battery Backup Switching | No Backup | No Backup | No Backup |
| Reset Delay Time | - | - | - |
| Supply Voltage Max | - | - | - |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 105 C | + 105 C | + 105 C |
| Quiescent Current | 800 nA | 800 nA | 800 nA |
| Accuracy | 1 % | 1 % | 1 % |
| Series | BD49 | BD49 | BD49 |
| Packaging | Reel | Reel | Reel |
| Brand | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Overvoltage Threshold | 3.838 V | 3.939 V | 3.838 V |
| Undervoltage Threshold | 3.762 V | 3.861 V | 3.762 V |
| Chip Enable Signals | No Chip Enable | No Chip Enable | No Chip Enable |
| Development Kit | - | - | - |
| Operating Supply Current | - | - | - |
| Pd Power Dissipation | 210 mW | 210 mW | 540 mW |
| Power Fail Detection | No | No | No |
| Product Type | Supervisory Circuits | Supervisory Circuits | Supervisory Circuits |
| Factory Pack Quantity | 3000 | 3000 | 3000 |
| Subcategory | PMIC - Power Management ICs | PMIC - Power Management ICs | PMIC - Power Management ICs |
| Supply Voltage Min | - | - | - |
| Part # Aliases | BD4938FVE | BD4939FVE | BD4938G |