BQ4845YS-A4TR

Mfr. #:: BQ4845YS-A4TR
Description:: Real Time Clock Watchdog Timer
Lifecycle:: New from this manufacturer.
Datasheet:: BQ4845YS-A4TR Datasheet
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More Information:: BQ4845YS-A4TR more Information BQ4845YS-A4TR Product Details

Product Attribute
Attribute Value

Manufacturer:: Texas Instruments

Product Category:: Real Time Clock

RoHS:: Y

Mounting Style:: SMD/SMT

Package / Case:: SOIC-28

RTC Bus Interface:: Parallel

Time Format:: HH:MM:SS

Battery Backup Switching:: Backup Switching

RTC Memory Size:: 16 B

Supply Voltage - Max:: 5.5 V

Supply Voltage - Min:: 4.5 V

Minimum Operating Temperature:: - 40 C

Maximum Operating Temperature:: + 85 C

Packaging:: Reel

Function:: Alarm, Calendar, Clock, Timer Interrupt

Series:: BQ4845Y

Brand:: Texas Instruments

Product Type:: Real Time Clocks

Factory Pack Quantity:: 1000

Subcategory:: Clock & Timer ICs

Unit Weight:: 0.025778 oz

Tags: BQ4845YS-A, BQ4845YS, BQ4845Y, BQ4845, BQ484, BQ48, BQ4

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We provide 90-360 days warranty.

If the items you received were not in perfect quality, we would be responsible for your refund or replacement, but the items must be returned in their original condition.
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we buy and manage excess electronic components, including excess inventory identified for disposal.
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BQ4845YS-A4TR Description

***roFlash: Real Time Clock Parallel 16byte Clock/Calendar/Alarm/Timer/Interrupt 28-Pin SOIC T/R

***ark: Real Time Clock IC; Date Format:BCD; Time Format:BCD; Clock IC Type:RTC; Interface Type:Parallel; Supply Voltage Range:4.5V to 5.5V; Digital IC Case Style:SOIC; No. of Pins:28; Operating Temperature Range:0°C to +70°C ;RoHS Compliant: Yes

***as Instruments: The bq4845 Real-Time Clock is a low-power microprocessor peripheral that integrates a time-of-day clock, a 100-year calendar, and a CPU supervisor in a 28-pin SOIC or DIP. The bq4845 is ideal for fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers. The bq4845 provides direct connections for a 32.768KHz quartz crystal and a 3V backup battery. Through the use of the conditional chip enable output (CE\OUT) and battery voltage output (VOUT) pins, the bq4845 can write-protect and make nonvolatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information in the absence of system voltage. The bq4845 contains a temperature-compensated reference and comparator circuit that monitors the status of its voltage supply. When the bq4845 detects an out-of-tolerance condition, it generates an interrupt warning and subsequently a microprocessor reset. The reset stays active for 200ms after VCC rises within tolerance, to allow for power supply and processor stabilization. The bq4845 also has a built-in watchdog timer to monitor processor operation. If the microprocessor does not toggle the watchdog input (WDI) within the programmed time-out period, the bq4845 asserts WDO\ and RST\. WDI unconnected disables the watchdog timer. The bq4845 can generate other interrupts based on a clock alarm condition or a periodic setting. The alarm interrupt can be set to occur from once per second to once per month. The alarm can be made active in the battery-backup mode to serve as a system wake-up call. For interrupts at a rate beyond once per second, the periodic interrupt can be programmed with periods of 30.5us to 500ms.

Market price

Part #	Description	Stock	Price
BQ4845YS-A4TR DISTI # BQ4845YS-A4TR-ND	IC RTC CLK/CALENDAR PAR 28-SOIC RoHS: Compliant Min Qty: 1000 Container: Tape & Reel (TR)	Limited Supply - Call
BQ4845YS-A4TR DISTI # 595-BQ4845YS-A4TR	Real Time Clock Watchdog Timer RoHS: Compliant	0
BQ4845YS-A4TR	Real Time Clock, Non-Volatile, 1 Timer(s), CMOS, PDSO28 RoHS: Compliant	750	1000:$3.1300 500:$3.3000 100:$3.4300 25:$3.5800 1:$3.8500

Related products

Image	Part #	Description
	Mfr.#: BQ4845S-A4TR OMO.#: OMO-BQ4845S-A4TR	Real Time Clock w/NVSRAM Control Watchdog Timer
	Mfr.#: BQ4845YS-A4G4 OMO.#: OMO-BQ4845YS-A4G4	Real Time Clock Watchdog Timer
	Mfr.#: BQ4845 OMO.#: OMO-BQ4845-1190	New and Original
	Mfr.#: BQ4845-N OMO.#: OMO-BQ4845-N-1190	New and Original
	Mfr.#: BQ4845P OMO.#: OMO-BQ4845P-1190	New and Original
	Mfr.#: BQ4845YP OMO.#: OMO-BQ4845YP-1190	New and Original
	Mfr.#: BQ4845YP-A4 OMO.#: OMO-BQ4845YP-A4-TEXAS-INSTRUMENTS	IC RTC CLK/CALENDAR PAR 28-DIP
	Mfr.#: BQ4845YP-A4E3 OMO.#: OMO-BQ4845YP-A4E3-TEXAS-INSTRUMENTS	IC RTC CLK/CALENDAR PAR 28-DIP
	Mfr.#: BQ4845YS-A4 OMO.#: OMO-BQ4845YS-A4-TEXAS-INSTRUMENTS	Real Time Clock w/NVSRAM Control Watchdog Time
	Mfr.#: BQ4845P-A4 OMO.#: OMO-BQ4845P-A4-TEXAS-INSTRUMENTS	IC RTC CLK/CALENDAR PAR 28-DIP

Availability

Stock:: Available
On Order:: 5500
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Start with

BQ4845YS-A 7
BQ4845YS 15
BQ4845Y 19
BQ4845 34
BQ484 38
BQ48 96
BQ4 259

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BQ4845YS-A4TR

Step1:Vacuum Packaging with PL

Step2:Anti-Static Bag

Step3:Packaging Boxes

Step1:
Vacuum Packaging with PL

Step2:
Anti-Static Bag

Step3:
Packaging Boxes