PCF2123

PCF2120 : The PCF2120 is a CMOS quartz oscillator optimized for low power consumption. The 32 kHz output signal is gated using an enable signal. 2. Features I I I I I I Clock operating voltage: 1.5 V to 5.5 V Low backup current: typical 0.85 µA at VDD = 3.0 V and Tamb = 25 °C 32.768 kHz output for peripheral devices Two integrated oscillator capacitors Push-pull output Internal power-on reset 3. Applications I Portable instruments I Industrial products I Battery powered products 4. Quick reference data Table 1. VDD IDD Quick reference data Conditions [1] Symbol Parameter supply voltage supply current Min 1.5 - Typ 210 265 Max 5.5 450 650 Unit V nA nA clock output disabled VDD = 2.0 V; Tamb = .

PCF2127 : The PCF2127 is a CMOS1 Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2127 has 512 bytes of general-purpose static RAM, a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features. For a selection of NXP Real-Time Clocks, see Table 94 on page 89 2. Features and benefits  UL Recognized Component  Operating temperature range from 40 C to +85 C  Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors  Typical acc.

PCF2127A : The PCF2127A is a CMOS1 Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2127A has 512 bytes of general purpose static RAM, a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features. 2. Features and benefits „ „ „ „ „ „ Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors Typical accuracy: ±3 ppm from −15 °C to +60 °C Integration of a 32.768 kHz quartz crystal and oscillator in the same package Provides year, mon.

PCF2128 : The PCF2128 is a ready to run CMOS real time clock/calendar with an integrated temperature compensated crystal oscillator (TCXO). In timekeeping applications the high accuracy of the PCF2128 allows it to be used as a replacement for costly and higher powered long wave receivers or GPS receivers. A programmable battery switch-over circuit enables an uninterruptible power supply and consequently continuous timekeeping. The PCF2128 additionally features 512 bytes of general purpose RAM, a programmable watchdog, a time stamp facility and a voltage monitoring facility. Programming is possible using either an SPI or an I2C-bus interface. 2. Features „ Integration of a 32.768 kHz quartz crystal in.

PCF2129 : The PCF2129 is a CMOS1 Real Time Clock (RTC) and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2129 has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features. For a selection of NXP Real-Time Clocks, see Table 82 2 Features and benefits • UL Recognized Component (PCF2129AT and PCF2129T) • Operating temperature range from -40 °C to +85 °C • Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors • Typical accuracy: – PCF2129AT: ±3 ppm f.

PCF2129A : The PCF2129A is a CMOS1 real time clock and calendar with an integrated Temperature Compensated Crystal (Xtal) Oscillator (TCXO) and a 32.768 kHz quartz crystal optimized for very high accuracy and very low power consumption. The PCF2129A has a selectable I2C-bus or SPI-bus, a backup battery switch-over circuit, a programmable watchdog function, a timestamp function, and many other features. 2. Features „ „ „ „ „ Temperature Compensated Crystal Oscillator (TCXO) with integrated capacitors Accuracy: ±3 ppm from −15 °C to +60 °C Integration of a 32.768 kHz quartz crystal and oscillator in the same package Provides year, month, day, weekday, hours, minutes, and seconds Timestamp function ‹ wit.