Real Time Clocks
Real Time Clocks (RTCs) provide time and/or date information in almost any electronic device which needs to keep accurate time. The clock types are binary counter, clock/calendar/supervisor, elapsed time counter, phantom time chip, portable system controller, temperature recorder, time event recorder, and timer clock peripheral. They contain memory sizes ranging from 2 B to 2 MB and have interface options of I2C, Parallel, Serial, SPI, 1-Wire, 2-Wire, 3-Wire, and 4-Wire.
Sourcing Microchip Technology Real Time Clocks: in-stock lines for quick ship, BOM matching for multi-line builds, and original-channel screening — not keyword stuffing.
Product List
Total Components: 130
| Product | Pricing | Datasheet | Features | Memory Size | Time Format | Date Format | Interface | Voltage - Supply, Battery | Current - Timekeeping (Max) | Type | Mounting Type | Operating Temperature | Voltage - Supply | Package / Case | Supplier Device Package | Stock & Quantity |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 MCP7940NT-I/ST Microchip Technology | 1 $0.9200 | Alarm, Leap Year, Square Wave Output, SRAM | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.5V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 9,317 | |
 MCP79400-I/SN Microchip Technology | 1 $0.9500 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 4,971 | |
 MCP79400-I/MS Microchip Technology | 1 $1.0100 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | 7,942 | |
MCP79410T-I/SN Microchip Technology | 1 $1.1620 100 $0.9296 500 $0.7746 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B, 1Kb | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 150 | |
MCP79401-I/SN Microchip Technology | 1 $1.0500 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 4,167 | |
MCP79402-I/SN Microchip Technology | 1 $1.0500 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 2,441 | |
MCP79410T-I/ST Microchip Technology | 1 $1.1000 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B, 1Kb | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 7,704 | |
MCP79410-I/MS Microchip Technology | 1 $1.1000 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B, 1Kb | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | 3,196 | |
MCP79401-I/MS Microchip Technology | 1 $1.1000 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | 9,871 | |
MCP79411-I/ST Microchip Technology | 1 $1.1900 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B, 1Kb | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 1,218 | |
MCP79412-I/ST Microchip Technology | 1 $1.1900 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B, 1Kb | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 5,792 | |
MCP79400T-I/ST Microchip Technology | 1 $0.9900 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 5,687 | |
MCP79401T-I/SN Microchip Technology | 1 $1.0350 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 5,608 | |
 MCP79400T-I/MNY Microchip Technology | 1 $1.0350 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-WFDFN Exposed Pad | 8-TDFN (2x3) | 3,837 | |
MCP79402T-I/SN Microchip Technology | 1 $1.0350 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 1,365 | |
MCP79401T-I/ST Microchip Technology | 1 $1.0950 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 3,314 | |
MCP79401T-I/MS Microchip Technology | 1 $1.0950 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | 2,474 | |
MCP79402T-I/ST Microchip Technology | 1 $1.0950 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP (0.173", 4.40mm Width) | 8-TSSOP | 1,429 | |
MCP79402T-I/MS Microchip Technology | 1 $1.0950 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-MSOP | 7,725 | |
MCP79401T-I/MNY Microchip Technology | 1 $1.1400 | Alarm, Leap Year, Square Wave Output, SRAM, Unique ID | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | 1.2µA (Typ) @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-WFDFN Exposed Pad | 8-TDFN (2x3) | 6,338 |