Ricoh manuals, page 6
RICOH RN5T659 Manual
RN5T659 is a charge pump for white LED, which has a constant frequency and can be individually controlled by single wire serial pulse I/F for output enable/disable, LEDs current and LDOs ON/OFF.
RICOH R2043K/T Manual
The R2043K/T is a CMOS real-time clock IC connected to the CPU by four signal lines, CE, SCLK, SI, SO, and configured to perform serial transmission of time and calendar data to the CPU. The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.45µA at 3V). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-on; The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold settings. The 32.768kHz clock output function (N-channel open drain output) is intended to output sub-clock pulses for the external microcomputer. The oscillation adjustment circuit is intended to adjust time counts with high precision by correcting deviations in the oscillation frequency of the crystal oscillator. Since the package for these ICs are TSSOP10G (4.0x2.9x1.0: R2043T) or FFP12 (2.0x2.0x1.0: R2043K), high density mounting of ICs on boards is possible.
RICOH R2045S/D Manual
R2045S/D 4-wire Serial Interface Real Time Clock Module is a real-time clock module, built in CMOS real-time clock IC and crystal oscillator, connected to the CPU by four signal lines, CE, SCLK, SI, and SO, and configured to perform serial transmission of time and calendar data to the CPU.
RICOH Rx5C348A/B Manual
Rx5C348A/B are CMOS real-time clock ICs connected to the CPU by four signal lines, CE, SCLK, SI, SO, and configured to perform serial transmission of time and calendar data to the CPU.
RICOH RV5C339A Manual
The RV5C339A is a CMOS real-time clock IC connected to the CPU by three signal lines CE (Chip Enable), SCLK (Serial Clock), and SIO (Serial Input/Output), and configured to perform serial transmission of time and calendar data to the CPU. This model incorporates different functional circuits, including the periodic interrupt circuit, 2 alarm circuits, oscillation circuit, oscillation halt sensing circuit, supply voltage monitoring circuit, 32-kHz clock output function, and oscillation adjustment circuit. The product features ultra-compact size and low power consumption.
RICOH Rx5C338A Manual
The R×5C338A is a 3-wire serial interface real-time clock IC with voltage monitoring function. It is connected to the CPU through three signal lines and performs serial transmission of time and calendar data. It incorporates a periodic interrupt circuit, two alarm circuits, an oscillation circuit, an oscillation halt sensing circuit, a supply voltage monitoring circuit, a 32-kHz clock output function, and an oscillation adjustment circuit.
RICOH R2062 SERIES Manual
R2062 SERIES 3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function
RICOH R2061 SERIES Manual
R2061 SERIES 3 wire interface Real-Time Clock ICs with Battery Backup switch-over Function
RICOH R2033K/T Manual
The R2033K/T is a 3 wire interface real-time clock IC, which is a CMOS real-time clock IC using a capacitor oscillator of 32.768kHz as the clock frequency, generating 1 second clock pulses through the internal clock circuit, and generating clock interrupts and calendar interrupts through the internal circuit.
RICOH R2221T/L R2223T/L 2-wire Serial Interface Real Time Clock IC Manual
R2221T/L R2223T/L 2-wire Serial Interface Real Time Clock IC is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL, SDA, and configured to perform serial transmission of time and calendar data to the CPU.
RICOH R2051 SERIES 2 wire interface Real-Time Clock ICs with Battery Backup switch-over Function Manual
The R2051 is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL and SDA, and configured to perform serial transmission of time and calendar data to the CPU.
RICOH R2025S/D High precision I 2 C-Bus Real-Time Clock Module Manual
The R2025S/D is a high-precision I2C bus real-time clock module, built-in CMOS real-time clock IC and crystal oscillator, connected to the CPU by two signal lines, SCL and SDA, and configured to perform serial transmission of time and calendar data to the CPU. The oscillation frequency is adjusted to high precision (0±5 ppm: 15 sec. per month at 25°C) The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.48μA at 3V). The oscillation halt sensing circuit can be used to judge the validity of internal data in such events as power-on; The supply voltage monitoring circuit is configured to record a drop in supply voltage below two selectable supply voltage monitoring threshold settings. The 32-kHz clock output function (CMOS output) is intended to output sub-clock pulses for the external microcomputer. The oscillation adjustment circuit is intended to adjust time by correcting deviations in the oscillation frequency of the crystal oscillator.
RICOH R2023K/T 2-wire Serial Interface Real Time Clock IC Manual
R2023K/T is a CMOS real-time clock IC connected to the CPU by two signal lines, SCL, SDA, and configured to perform serial transmission of time and calendar data to the CPU. The periodic interrupt circuit is configured to generate interrupt signals with six selectable interrupts ranging from 0.5 seconds to 1 month. The 2 alarm interrupt circuits generate interrupt signals at preset times. As the oscillation circuit is driven under constant voltage, fluctuation of the oscillator frequency due to supply voltage is small, and the time keeping current is small (TYP. 0.45µA at 3V).
RICOH RS5C372A/B I 2 C bus SERIAL INTERFACE REAL-TIME CLOCK IC Manual
The RS5C372A is a CMOS-type I2C bus interface real-time clock IC that uses 2 wires to connect to the CPU and is capable of serially transmitting clock and calendar data to the CPU. The RS5C372A can generate various periodic interrupt clock pulses lasting for long periods (one month), and alarm interrupt can be made by days of the week, hours, and minutes by two incorporated systems. Since an oscillation circuit is driven at a constant voltage, it undergoes fluctuations of few voltage and consequently offers low current consumption (Typ. 0.5μA at 3V). It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and 32-kHz clock output for an external micro computer. (Nch. open drain output) The product also incorporates a time trimming circuit that adjusts the clock with higher precision by adjusting any errors in crystal oscillator frequencies based on signals from the CPU. The crystal oscillator may be selected from 32.768kHz or 32.000kHz types. Integrated into an ultra compact and ultra thin 8 pin SSOP package, the RS5C372A is the optimum choice for equipment requiring small sized and low power consuming products.
RICOH 2 C bus SERIAL INTERFACE REAL-TIME CLOCK IC WITH VOLTAGE MONITORING FUNCTION RV5C386A Manual
This product is a CMOS real-time clock IC with I2C bus serial interface and voltage monitoring function