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 Freescale / NXP Semiconductors 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: 75
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 PCF85263ATT1/AJ Freescale / NXP Semiconductors | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | 0.885µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 0.9V ~ 5.5V | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-TSSOP | 2,727 | ||
PCF85363ATT1/AJ Freescale / NXP Semiconductors | Alarm, Leap Year, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | 0.885µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 0.9V ~ 5.5V | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) | 10-TSSOP | 4,784 | ||
 PCF2123BS/1,518 Freescale / NXP Semiconductors | 1 $1.6300 | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | - | 0.33µA ~ 0.38µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.6V ~ 5.5V | 16-VFQFN Exposed Pad | 16-HVQFN (3x3) | 3,784 | |
 PCF8563BS/4,118 Freescale / NXP Semiconductors | 1 $1.6700 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | - | 0.6µA ~ 0.75µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 10-VFDFN Exposed Pad | 10-HVSON (3x3) | 8,690 | |
 PCA85073ADP/Q900Z Freescale / NXP Semiconductors | 1 $1.6800 | Alarm | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C | - | - | Clock/Calendar | - | -40°C ~ 105°C (TA) | 1.8V ~ 5.5V | - | - | 6,247 | |
 PCF2123TS/1,118 Freescale / NXP Semiconductors | 1 $1.5500 | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | - | 0.33µA ~ 0.38µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.6V ~ 5.5V | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | 4,164 | |
PCF2123TS/1,112 Freescale / NXP Semiconductors | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | - | 0.33µA ~ 0.38µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.6V ~ 5.5V | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | 1,081 | ||
 PCF8523T/1,118 Freescale / NXP Semiconductors | 1 $1.0500 100 $0.8400 500 $0.7000 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 5.5V | 0.5µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.6V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SO | 100 | |
PCF8523TS/1,118 Freescale / NXP Semiconductors | 1 $1.7400 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 5.5V | 0.5µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.6V ~ 5.5V | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | 6,851 | |
PCF8563T/F4,118 Freescale / NXP Semiconductors | 1 $1.4144 100 $1.1315 500 $0.9429 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | - | 0.6µA ~ 0.75µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-SOIC (0.154", 3.90mm Width) | 8-SO | 2,500 | |
 PCF8563TS/4,118 Freescale / NXP Semiconductors | 1 $2.1200 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS (24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | - | 0.6µA ~ 0.75µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 5.5V | 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) | 8-TSSOP | 2,766 | |
 PCF85363ATL/AX Freescale / NXP Semiconductors | 1 $1.6800 | Alarm, Leap Year, Watchdog Timer | 64B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 0.9V ~ 5.5V | 0.885µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 0.9V ~ 5.5V | 10-XFDFN Exposed Pad | 10-DFN (2.6x2.6) | 4,149 | |
PCA21125T/Q900/1,1 Freescale / NXP Semiconductors | 1 $2.5400 | Alarm, Leap Year, Square Wave Output, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | SPI | - | 30.3µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 125°C | 1.6V ~ 5.5V | 14-TSSOP (0.173", 4.40mm Width) | 14-TSSOP | 9,831 | |
PCF8593T/1,118 Freescale / NXP Semiconductors | 1 $3.9500 | Alarm, NVSRAM | 8B | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | - | 8µA ~ 15µA @ 2V ~ 5V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 2.5V ~ 6V | 8-SOIC (0.154", 3.90mm Width) | 8-SO | 4,544 | |
 PCF2127T/2Y Freescale / NXP Semiconductors | 1 $101.7857 100 $81.4285 500 $67.8571 | Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Watchdog Timer | 512B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 4.2V | 1.5µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 4.2V | 16-SOIC (0.295", 7.50mm Width) | 16-SO | 500 | |
 PCF2127AT/2Y Freescale / NXP Semiconductors | 1 $5.7400 | Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal, Watchdog Timer | 512B | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 4.2V | 1.5µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 4.2V | 20-SOIC (0.295", 7.50mm Width) | 20-SO | 2,323 | |
PCF2129AT/2,518 Freescale / NXP Semiconductors | 1 $6.2000 | Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 4.2V | 1.5µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 4.2V | 20-SOIC (0.295", 7.50mm Width) | 20-SO | 5,587 | |
PCA2129T/Q900/2,51 Freescale / NXP Semiconductors | 1 $6.6500 | Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 4.2V | 1.5µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 4.2V | 16-SOIC (0.295", 7.50mm Width) | 16-SO | 8,273 | |
PCF2129T/2,518 Freescale / NXP Semiconductors | 1 $36.9644 100 $29.5715 500 $24.6429 | Alarm, Leap Year, Square Wave Output, TCXO/Crystal, Watchdog Timer | - | HH:MM:SS (12/24 hr) | YY-MM-DD-dd | I²C, 2-Wire Serial | 1.8V ~ 4.2V | 1.5µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C | 1.8V ~ 4.2V | 16-SOIC (0.295", 7.50mm Width) | 16-SO | 1,000 | |
PCF85263AUKZ Freescale / NXP Semiconductors | 1 $1.5700 | Alarm, Leap Year, Watchdog Timer | - | HH:MM:SS:hh (12/24 hr) | YY-MM-DD-dd | I²C | 0.9V ~ 5.5V | 0.885µA @ 3.3V | Clock/Calendar | Surface Mount | -40°C ~ 85°C (TA) | 0.9V ~ 5.5V, 1.8V ~ 5.5V | 12-XFBGA, WLCSP | 12-WLCSP (1.19x0.94) | 4,518 |