| Picture | ES Part No. | Part No | Stock | Price | Datasheet | Pb Free | RoHS | Description | Vendor | Package / Case | Packaging |
| | | | | | | | | | | |
 | 0057-0145-3 | RX8900SA:UA3 PURE SN | 0 | 138.30 |  | PB-Free | RoHS | Real Time Clock Module, Built-In Frequency Adjusted 32.768kHz Crystal Unit/DTCXO/Backup Switchover Circuit, I2C-Bus Interface | EPSON | SOIC-14 | TAPE & REEL |
 | 0223-0039-4 | ISL12028IBZ | 1,137 | 63.24 | | PB-Free | | Real Time Clock/Calendar with EEPROM Automatic Backup to Battery or SuperCap | INTERSIL/RENESAS | SOIC-14 | TUBE |
| 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-14 | TUBE |
 | 0067-0090-3 | DS3231SN#-T/R | 0 | 182.50 | | PB-Free | RoHS | RTC Extremely Accurate I2C-Integrate RTC/TCXO/CRYSTAL | DALLAS/MAXIM | SOIC-16 | TAPE & REEL |
| 0126-0181-8 | DS3231SN#T&R | 2,683 | 142.40 | | PB-Free | RoHS | Extremely Accurate I2C Real-Time Clock (RTC), Integrated Temperature-Compensated Crystal Oscillator (TCXO) and Crystal | MAXIM INTEGRATED | SOIC-16 | TAPE & REEL |
 | 0339-0098-2 | NE555D | 2,399 | 6.80 | | PB-Free | RoHS | CMOS General Purpose Timer | HTC | SOIC-8 | TAPE & REEL |
 | 0126-0180-6 | DS1302Z+T&R | 2,243 | 37.45 | | 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-8 | TAPE & REEL |
| 0067-0085-4 | DS1307Z+T/R | 4,161 | 31.03 | | PB-Free | RoHS | 64x8 Serial Real Time Clock, 56 Bytes RAM 2-Wire, Bi-Directional Bus | DALLAS/MAXIM | SOIC-8 | TAPE & REEL |
| 1522-0207-7 | MCP79411T-I/SN | 1,000 | 54.48 | | 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-8 | TAPE & REEL |
 | 0057-0166-1 | X1B000242000111 | 993 | 31.08 | | 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-8 | TAPE & REEL |
 | 0176-0518-1 | BU9873FJ-GTE2 | 6,534 | 13.92 | | PB-Free | RoHS | I2C Bus Serial Interface RTC(Real Time Clock) With High-Precision Oscillation Adjustment | ROHM | SOIC-8 | TAPE & REEL |
| 1522-0104-7 | MCP7940NT-I/SN | 150 | 86.50 | | PB-Free | RoHS | Battery-Backed I2C Real-Time Clock/Calendar(RTCC) with SRAM 64Bytes | MICROCHIP | SOIC-8 | TAPE & REEL |
| 0035-1444-3 | MCP79411-I/SN | 164 | 57.93 | | 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-8 | TUBE |
| 0035-1443-0 | MCP7940N-I/SN | 3,231 | 52.13 | | PB-Free | RoHS | Battery-Backed I2C Real Time Clock/Calendar with SRAM 64 Bytes, Vcc = 1.8V to 5.5V | MICROCHIP | SOIC-8 | TUBE |
| 0035-1813-8 | MCP7940NT-I/SN | 2,920 | 48.26 | | PB-Free | RoHS | Battery-Backed I2C Real-Time Clock/Calendar(RTCC) with SRAM 64Bytes | MICROCHIP | SOIC-8 | TAPE & REEL |
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