Datasheet Texas Instruments BQ4845S-A4

RTC IC W NVSRAM Control, Watchdog Timer, uP Reset, Interrupts and Battery Low Warning 28-SOIC 0 to 70

Datasheets

PDF, 1.6 Mb, File published: Sep 5, 1999

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Lifecycle Status	Lifebuy (Manufacturer has announced that the device will be discontinued, and a lifetime-buy period is in effect)
Manufacture's Sample Availability	No

RoHS

Compliant

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U-502 Time-Base Oscillator for RTC IC
PDF, 313 Kb, File published: Sep 5, 1999
Time-Base Oscillator for RTC ICs.The operation of the time-base oscillator is critical to the timekeeping functions of the bq3285, bq4285, and bq4845 series of real-time-clocks (RTCs). This application note describes some basic characteristics of the piezoelectric crystal and the on-chip crystal oscillator circuitry designed into these RTC series. It also includes suggestions for achieving timek
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U-500 Using the bq4845 for a Low-Cost RTC/NVSRAM Subsystem
PDF, 332 Kb, File published: Sep 5, 1999
Using the bq4845 for a Low-Cost RTC/NVSRAM Subsystem.The bq4845 combines on one IC a low-power real-time clock (RTC), a microcontroller supervisor, and a nonvolatile control circuit for static RAM. The part is the basis of a low-cost, reliable RTC plus nonvolatile SRAM subsystem for many embedded applications. This application note discusses the key aspects of bq4845 operation: component sele

Series: BQ4845 (9)

BQ4845SA4, BQ4845S A4