RICOH Manuals

The R5432V Series are high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable 3/4/5cell Li-ion/Lithium polymer battery. Each of these ICs is composed of voltage detectors, reference units, a delay circuit, a short circuit protector, an oscillator, a counter, and logic circuits. A more than 6 Cells battery is available by Cascade connection.

The R5433V Series are high voltage CMOS-based protection ICs for over-charge/discharge of rechargeable 3/4/5cell Li-ion/Lithium polymer battery. Each of these ICs is composed of ten voltage detectors, reference units, a delay circuit, an oscillator, a counter, and logic circuits. Disconnection between the battery and the protection board can be detected. SSOP-16 package is available.

R5434D series are high voltage second protection ICs for 2-5 cells rechargeable Li-ion/Li-polymer batteries.

This document is the RN5T614 product specification, which provides detailed information on the features and characteristics of the product

This is a 7-channel power management IC, model number RN5T564, with multiple functional characteristics, including LDO, DCDC, CPU interface, etc., please refer to the attached document for details

RN5T562 is a chip that integrates CMOS step-down DC/DC converter and two low dropout regulators (LDO). With some external components such as inductor, capacitors and resistor, it is easy to compose a low ripple, high efficiency step-down DC/DC converter.

RN5T561-0000 is a power management system device launched by Ricoh Electronics. It has multiple functional modules and flexible application modes, which is suitable for various mobile terminals and smart home applications.

RN5T649 is a constant frequency charge pump for white LED application. Its features include output enable/disable, LED current and LDO ON/OFF individually controllable through single wire serial pulse I/F.

This document is about the development specifications of RN5T651 Charge-Pump for White LED and Power Supply. It describes the features and characteristics of the product.

This document is a detailed description of the RN5T652 development specifications, describing the features and characteristics of the product, including charge pump and power supply for white LED.

RN5T653 is a white LED charge pump, output enable / disable, LED current and LDO output voltage can be individually controlled through single wire serial pulse I / F.

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.

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.

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.