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.
Product List
Total Components: 2,323
| Product | Pricing | Datasheet | Type | Features | Memory Size | Time Format | Date Format | Interface | Voltage - Supply | Voltage - Supply, Battery | Current - Timekeeping (Max) | Operating Temperature | Mounting Type | Package / Case | Supplier Device Package | Stock & Quantity |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 DS1746-70IND+ ADI (Analog Devices, Inc.) | 1 $43.1700 | Datasheet | Clock/Calendar | Leap Year, NVSRAM, Y2K | 128KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 4mA @ 5V | -40°C ~ 85°C | Through Hole | 32-DIP Module (0.600", 15.24mm) | 32-EDIP | 9,560 Cart + RFQ |
DS1554-70+ ADI (Analog Devices, Inc.) | 1 $32.0800 | Datasheet | Clock/Calendar | Alarm, Leap Year, NVSRAM, Watchdog Timer, Y2K | 32KB | HH:MM:SS (24 hr) | YY-MM-DD-dd | Parallel | 4.5V ~ 5.5V | - | 6mA @ 5V | 0°C ~ 70°C | Through Hole | 32-DIP Module (0.600", 15.24mm) | 32-EDIP | 5,451 Cart + RFQ |
 PCF85063ATL/1,118 Freescale / NXP Semiconductors | 1 $0.9900 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.6µA @ 3.3V | -40°C ~ 85°C | Surface Mount | 10-XFDFN Exposed Pad | 10-DFN (2.6x2.6) | 6,575 Cart + RFQ |
 PCF85063AT/AY Freescale / NXP Semiconductors | 1 $1.0500 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.6µA @ 3.3V | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SO | 6,523 Cart + RFQ |
 PCF85063ATT/AJ Freescale / NXP Semiconductors | 1 $0.6615 100 $0.5292 500 $0.4410 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.6µA @ 3.3V | -40°C ~ 85°C | Surface Mount | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP | 5,000 Cart + RFQ |
 PCF85063TP/1Z Freescale / NXP Semiconductors | 1 $1.0600 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.6µA @ 3.3V | -40°C ~ 85°C | Surface Mount | 8-WFDFN Exposed Pad | 8-HWSON (2x3) | 2,890 Cart + RFQ |
 PT7C4363BZEEX Diodes Incorporated | 1 $1.7000 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.3V ~ 5.5V | - | 0.85µA ~ 0.9µA @ 3V ~ 5V | -40°C ~ 85°C (TA) | Surface Mount | 8-WFDFN Exposed Pad | 8-TDFN (2x3) | 4,773 Cart + RFQ |
PCF85263AT/AJ Freescale / NXP Semiconductors | 1 $1.0286 100 $0.8228 500 $0.6857 | Datasheet | Clock/Calendar | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | 0.9V ~ 5.5V | 0.885µA @ 3.3V | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SO | 1,000 Cart + RFQ |
 MCP7940MT-I/MNY Microchip Technology | 1 $0.7700 | Datasheet | Clock/Calendar | Alarm, Leap Year, Square Wave Output, SRAM | 64B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 5.5V | - | 1µA @ 5.5V | -40°C ~ 85°C | Surface Mount | 8-WFDFN Exposed Pad | 8-TDFN (2x3) | 1,669 Cart + RFQ |
 CBC92132C-Q3-TR3 Cymbet | 1 $1.6700 | Datasheet | Clock/Calendar | Alarm, Backup Supply Charger, Leap Year, RAM | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C | 2.5V ~ 5.5V | 3.2V | 0.05µA @ 2.5V ~ 5.5V | -40°C ~ 85°C | Surface Mount | 16-UFQFN Exposed Pad | 16-MLPQ (3x3) | 9,753 Cart + RFQ |
 R2221T-E2-F JRC (Nisshinbo Micro Devices) | 1 $1.7200 | Datasheet | Clock/Calendar | Alarm, Leap Year, RAM | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.5V ~ 5.5V | - | 0.9µA @ 3V | -40°C ~ 85°C | Surface Mount | 10-VFSOP, 10-MSOP (0.110", 2.80mm Width) | 10-TSSOPG | 6,757 Cart + RFQ |
 RV5C348A-E2-F JRC (Nisshinbo Micro Devices) | 1 $1.7500 | Datasheet | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | 4-Wire Serial | 2V ~ 5.5V | - | 1µA @ 3V | -40°C ~ 85°C | Surface Mount | 10-LFSOP, 10-MSOP (0.110", 2.80mm Width) | 10-SSOP-G | 3,528 Cart + RFQ |
 RS5C372A-E2-F JRC (Nisshinbo Micro Devices) | 1 $1.7500 | Datasheet | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.7V ~ 6V | - | 0.9µA ~ 2µA @ 3V ~ 6V | -40°C ~ 85°C | Surface Mount | 8-LSSOP (0.173", 4.40mm Width) | 8-SSOP | 5,369 Cart + RFQ |
 RV-8263-C7-32.768KHZ-20PPM-TA-QA Micro Crystal | 1 $1.7900 | Datasheet | Clock/Calendar | Alarm, Leap Year, Programmable Clock Output, RAM, Timer | 1B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | - | 0.24µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | 8-WCDFN | 8-SON (3.2x1.5) | 6,264 Cart + RFQ |
 PCF8523TK/1,118 Freescale / NXP Semiconductors | 1 $3.0000 100 $2.4000 500 $2.0000 | Datasheet | Clock/Calendar | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.6V ~ 5.5V | 1.8V ~ 5.5V | 0.5µA @ 2V ~ 5V | -40°C ~ 85°C | Surface Mount | 8-VDFN Exposed Pad | 8-HVSON (4x4) | 100 Cart + RFQ |
 PCF8583T/5,518 Freescale / NXP Semiconductors | 1 $5.0216 | Datasheet | Clock/Calendar | Alarm, NVSRAM, Square Wave Output | 240B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD | I²C, 2-Wire Serial | 2.5V ~ 6V | - | 10µA ~ 50µA @ 1V ~ 5V | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.295", 7.50mm Width) | 8-SO | 100,000 Cart + RFQ |
PCF8583T/5,512 Freescale / NXP Semiconductors | 1 $5.0216 | Datasheet | Clock/Calendar | Alarm, NVSRAM, Square Wave Output | 240B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD | I²C, 2-Wire Serial | 2.5V ~ 6V | - | 10µA ~ 50µA @ 1V ~ 5V | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.295", 7.50mm Width) | 8-SO | 100,000 Cart + RFQ |
 RV-2123-C2-32.768KHZ-20PPM-TA-QC Micro Crystal | 1 $5.2200 | Datasheet | Clock/Calendar | Alarm, Leap Year, Programmable Clock Output, Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI, 4-Wire Serial | 1.1V ~ 5.5V | - | 0.18µA @ 3V | -40°C ~ 85°C (TA) | Surface Mount | 10-TCDFN Exposed Pad | 10-SON (5x3.2) | 8,604 Cart + RFQ |
 V3021SO8A+ EM Microelectronic | 1 $3.1600 | Datasheet | Clock/Calendar | Alarm, Leap Year, RAM | 1B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | 3-Wire Serial | 2V ~ 5.5V | - | 10µA @ 5V | -40°C ~ 85°C (TA) | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 6,988 Cart + RFQ |
ISL12008IB8Z Intersil (Renesas Electronics Corporation) | 1 $3.3400 | Datasheet | Clock/Calendar | Alarm, Leap Year | - | HH:MM:SS:hh (24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 2.7V ~ 5.5V | 1.8V ~ 5.5V | 4µA ~ 6µA @ 3V ~ 5V | -40°C ~ 85°C | Surface Mount | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC | 8,130 Cart + RFQ |