OUTLINE The RS5C372B is a CMOS type real-time clock which is connected to the CPU via 2-wire and capable of serial transmission of clock and calendar data to the CPU. The RS5C372B can generate various periodic interrupt clock pulses lasting for long period (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 (0.5µA at 3V). It also provides an oscillator halt sensing function applicable for data validation at power-on and other occasions and 32kHz clock output (CMOS output) for an external micro computer. 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 between 32.768kHz or 32.000kHz types. Integrated into an ultra compact and ultra thin 8 pin SSOP package, the RS5C372B is the optimum choice for equipment requiring small sized and low power consuming products.
Features ● Time keeping voltage 1.45V to 6.0V ● Lowest supply current 0.5µA TYP (0.9µA MAX) at 3V(25°C) (0.9µA MAX) at 3V(-40 to +85°C) ● Connected to the CPU via only 2-wire (I2C-bus interface, max.400KHz, address 7bits) ● A clock counter (hours, minutes, and seconds) and a calendar counter (leap years, years, months, days, and days of the week) in BCD codes ● Interrupt to the CPU (period of one month to half second, with interrupt flag, interrupt halt function) (/INTR) ● Two systems of alarm functions (days of the week, hours, and minutes) (/INTR) ● Oscillation halt sensing to judge internal data validity ● Clock output of 32.768kHz(32.000kHz) ( output controllable via a register) (32KOUT:CMOS push-pull output) ● Second digit adjustment by ±30 seconds ● Automatic leap year recognition up to the year 2099 ● 12-hour or 24-hour time display selectable ● Oscillation stabilizing capacity (CG, CD) incorporated ● High precision clock error adjustment circuit ● Oscillator of 32.768kHz or 32.000kHz may be used ● CMOS logic ● Package:8Pin SSOP
DESCRIPTION The PS2715-1 is an optically coupled isolator containing GaAs light emitting diodes and an NPN silicon phototransistor in a plastic SOP for high density applications. The package is an SOP (Small Outline Package) type for high density mounting applications.
FEATURES • AC input response • High current transfer ratio (CTR = 200 % TYP. @ IF = ±1 mA) • High isolation voltage (BV = 3 750 Vr.m.s.) • Small and thin package (4-pin SOP) • Ordering number of tape product: PS2715-1-F3, F4 • UL approved: File No. E72422 (S)
DESCRIPTION NECs PS2711-1 is an optically coupled isolator containing a GaAs light emitting diode and an NPN silicon phototransistor in a plastic SOP (Small Out-Line Package) for high density applications.
FEATURES • HIGH CURRENT TRANSFER RATIO: CTR = 200% TYP @ IF = 1 mA • HIGH ISOLATION VOLTAGE: BV = 3.75 k Vr.m.s. • SMALL THIN PACKAGE: 4 pin SOP • AVAILABLE IN TAPE AND REEL
APPLICATIONS • PROGRAMMABLE LOGIC CONTROLLERS • SMALL POWER SUPPLY • HYBRID IC • MODEM/FAX
FEATURES 1. Multi-function type with MOSFET and optocoupler Instead of the conventional arrangement of a separate PhotoMOS relay and optocoupler, PhotoMOS relay and 2 optocoupler this new multi-function type encapsulates the PhotoMOS relay and optocoupler into one SOP package. 2. Ultra-small package size Integration of the two devices makes a significant size reduction possible. The SOP package measures (W) 4.4 × (D) 9.37 × (H) 2.1 mm ((W) .173× (D) .369× (H) .083 inch). 3. Ideal for PC card and Fax/Modem applications The small size provides additional space for increased functionality, without sacrificing any of the performance of conventional MOSFET relay and optocoupler, PhotoMOS relay and 2 optocoupler combinations. The new device has been specifically designed for the PCMCIA market. 4. Also available in 8-pin SOP package 2 Form A MOSFET relays are also available in a single 8-pin SOP package.
TYPICAL APPLICATIONS • PCMCIA/JEIDA standard FAX/Modem card
DESCRIPTION The PS2711-1 is an optically coupled isolator containing a GaAs light emitting diode and an NPN silicon phototransistor in a plastic SOP for high density applications. The package is an SOP (Small Outline Package) type for high density mounting applications.
FEATURES • High current transfer ratio (CTR = 200 % TYP. @ IF = 1mA) • High isolation voltage (BV = 3 750 Vr.m.s.) • Small and thin package (4-pin SOP) • Ordering number of tape product: PS2711-1-F3, F4 • UL approved: File No. E72422 (S)
APPLICATIONS • Programmable logic controllers • Small power supply • Hybrid IC • Modem/FAX