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| PartNumber | BR93H66RF-WCE2 | BR93H66RFJ-2CE2 | BR93H66RF-2CE2 |
| Description | EEPROM (3-Wire) 1.25MHz 4Kbit 2.7-5.5V | EEPROM (3-Wire) 2MHz 4Kbit 2.5-5.5V | EEPROM (3-Wire) 2MHz 4Kbit 2.5-5.5V |
| Manufacturer | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Product Category | EEPROM | EEPROM | EEPROM |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | SOP-8 | SOP-J8 | SOP-8 |
| Memory Size | 4 kB | 4 kB | 4 kB |
| Organization | 256 x 16 | 256 x 16 | 256 x 16 |
| Interface Type | Serial, 3-Wire, Microwire | Serial, 3-Wire, Microwire | Serial, 3-Wire, Microwire |
| Data Retention | 40 Year | 100 Year | 100 Year |
| Maximum Clock Frequency | 1.25 MHz | 2 MHz | 2 MHz |
| Supply Current Max | 3 mA | 3 mA | 3 mA |
| Supply Voltage Min | 2.7 V | 2.5 V | 2.5 V |
| Supply Voltage Max | 5.5 V | 5.5 V | 5.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 125 C | + 125 C | + 125 C |
| Qualification | AEC-Q100 | - | - |
| Packaging | Reel | Reel | Reel |
| Brand | ROHM Semiconductor | ROHM Semiconductor | ROHM Semiconductor |
| Operating Supply Voltage | 2.7 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| Product Type | EEPROM | EEPROM | EEPROM |
| Factory Pack Quantity | 2500 | 2500 | 2500 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Part # Aliases | BR93H66RF-WC | BR93H66RFJ-2C | BR93H66RF-2C |