| Picture | ES Part No. | Part No | Stock | Price | Datasheet | Pb Free | RoHS | Description | Vendor | Case Style | Interface | Memory Size (byte) | Mounting Type | Package / Case | MFR Package | Packaging |
| | | | | | | | | | | | | | | | |
 | 0223-0037-8 | X1228S14-4.5A | 17 | 66.14 |  | PB-Free | | Real Time Clock/Calendar/CPU Supervisor with EEPROM, 512x 8 Bit, I2C Interface Battery Switch or Super Cap Input | INTERSIL/RENESAS | SOIC | 2-Wire(I2C Compatible) | 4k | Surface Mount | SOIC-14 | SOIC-14 | TUBE |
 | 0126-0180-6 | DS1302Z+T&R | 2,274 | 35.43 | | PB-Free | RoHS | Trickle-Charge Timekeeping Chip, Real-Time Clock/ Calendar and 31 Bytes of Static RAM, 24-hour or 12-hour Mode, 3-Wire Interface | MAXIM INTEGRATED | SOIC | 3-Wire | 31 | Surface Mount | SOIC-8 | SO-8 | TAPE & REEL |
| 0067-0086-7 | DS1302Z+T/R | 0 | 46.41 | | PB-Free | RoHS | Real Time Clock, 31Bytes RAM, 3-Wire Serial, Trickle Charge Timekeeping Chip, 8PIN SOIC (150-mil) | DALLAS/MAXIM | SOIC | 3-Wire | 31 | Surface Mount | SOIC-8 | SOIC-8 | TAPE & REEL |
 | 0067-0060-1 | DS1302+ | 433 | 52.26 | | PB-Free | RoHS | Real Time Clock, 31 Bytes RAM, 3-Wire Serial, Trickle Charge Timekeeping Chip, 8PIN DIP (300-mil) | DALLAS/MAXIM | DIP | 3-Wire | 31 | Through Hole | PDIP-8 | PDIP-8 | TUBE |
 | 0057-0145-3 | RX8900SA:UA3 PURE SN | 0 | 134.50 | | PB-Free | RoHS | Real Time Clock Module, Built-In Frequency Adjusted 32.768kHz Crystal Unit/DTCXO/Backup Switchover Circuit, I2C-Bus Interface | EPSON | SOIC | I2C | - | Surface Mount | SOIC-14 | SOP-14 | TAPE & REEL |
| 0223-0039-4 | ISL12028IBZ | 1,137 | 59.82 | | PB-Free | | Real Time Clock/Calendar with EEPROM Automatic Backup to Battery or SuperCap | INTERSIL/RENESAS | SOIC | I2C | 4k | Surface Mount | SOIC-14 | SOIC-14 | TUBE |
 | 0057-0167-3 | X1B000311000114 | 976 | 30.66 | | PB-Free | RoHS | Real Time Clock Module, RX8130CE, with Auto Power Switching/Backup Battery Charge Control, I2C-Bus | EPSON | SMD | I2C | - | Surface Mount | SMD-10 | SMD-10 | TAPE & REEL |
| 0067-0085-4 | DS1307Z+T/R | 4,588 | 29.35 | | PB-Free | RoHS | 64x8 Serial Real Time Clock, 56 Bytes RAM 2-Wire, Bi-Directional Bus | DALLAS/MAXIM | SOIC | I2C | 56 | Surface Mount | SOIC-8 | SOIC-8 | TAPE & REEL |
 | 0016-0353-4 | PCF85363ATT1/AJ | 1,482 | 25.51 | | PB-Free | RoHS | Tiny Real-Time Clock/Calendar with 64 Bytes RAM Alarm Function,Battery Switch-Over Time Stamp Input,I2C Bus Interface | NXP/NEXPERIA/WEEN | SOIC | I2C | 64 | Surface Mount | TSSOP-10 | TSSOP-10 | TAPE & REEL |
| 1522-0207-7 | MCP79411T-I/SN | 1,000 | 53.00 | | PB-Free | RoHS | Battery-Backed I2C Real-Time Clock/Calendar with SRAM 64 Bytes, 1 Kbit EEPROM, Protected EEPROM, with EUI-48 MAC Address | MICROCHIP | SOIC | I2C | 64 | Surface Mount | SOIC-8 | SOIC-8 | TAPE & REEL |
 | 0057-0166-1 | X1B000242000111 | 993 | 30.66 | | PB-Free | RoHS | Real Time Clock Module, RX8010SJ, Built-In 128Bit User RAM (8Bit x 16, SRAM), Frequency Output Function (C-MOS/Open-Drain Output), I2C-Bus | EPSON | SOIC | I2C | 16 | Surface Mount | SOIC-8 | SOP-8 | TAPE & REEL |
| 0067-0062-7 | DS1307+ | 0 | 118.20 | | PB-Free | RoHS | 64x8 Serial Real Time Clock, 56 Bytes RAM 2-Wire Serial | DALLAS/MAXIM | DIP | I2C | 56 | Through Hole | PDIP-8 | PDIP-8 | TUBE |
| 0035-1813-8 | MCP7940NT-I/SN | 2,920 | 74.40 | | PB-Free | RoHS | Battery-Backed I2C Real-Time Clock/Calendar(RTCC) with SRAM 64Bytes | MICROCHIP | SOIC | I2C | 64 | Surface Mount | SOIC-8 | SOIC-8 | TAPE & REEL |
| 0035-1443-0 | MCP7940N-I/SN | 3,316 | 52.13 | | PB-Free | RoHS | Battery-Backed I2C Real Time Clock/Calendar with SRAM 64 Bytes, Vcc = 1.8V to 5.5V | MICROCHIP | SOIC | I2C | 64 | Surface Mount | SOIC-8 | SOIC-8 | TUBE |
 | 0051-0025-7 | HT1382 | 64 | 24.99 | | PB-Free | RoHS | Low Power Real Time Clock and Calendar with EEPROM 4 Bytes, Integrated Oscillator Load Capacitors 12.5pF, I2C Serial Interface. | HOLTEK | DIP | I2C | 4 | Through Hole | PDIP-8 | DIP-8 | TUBE |
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