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See Technical Specifications

BQ4802LYPW +BOM

Y2K-Compliant Parallel RTC with CPU Supervisor and External NVSRAM Control, 3V Vcc

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

BQ4802LYPW
Datasheet:

BQ4802LYPW Datasheet (PDF)
Programmable:

Not Verified
Type:

Clock/Calendar
Features:

Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer
Time Format:

HH:MM:SS (12/24 hr)
EDA/CAD Models:

Request Free CAD Models for BQ4802LYPW

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Tel: +852 95804164

BQ4802LYPW General Description

The bq4802Y/bq4802LY real-time clock is a low-power microprocessor peripheral that integrates a time-of-day clock, a century-based calendar, and a CPU supervisor, with package options including a 28-pin SOIC, TSSOP, or SNAPHAT that requires the bq48SH-28x6 to complete the two-piece module. The bq4802Y/ bq4802LY is ideal for fax machines, copiers, industrial control systems, point-of-sale terminals, data loggers, and computers.

The bq4802Y/bq4802LY provides direct connections for a 32.768-kHz quartz crystal and a 3-V backup battery. Through the use of the conditional chip enable output (CE\_OUT) and battery voltage output (V_OUT) pins, the bq4802Y/bq4802LY can write-protect and make non- volatile external SRAMs. The backup cell powers the real-time clock and maintains SRAM information the absence of system voltage. The crystal and battery are contained within the modules for a more integrated solution.

The bq4802Y/bq4802LY contains a temperature-compensated reference and comparator circuit that monitors the status of its voltage supply. When the bq4802Y/bq4802LY detects an out-of-tolerance condition, it generates an interrupt warning and subsequently a microprocessor reset. The reset stays active for 200 ms after V_CC rises within tolerance, to allow for power supply and processor stabilization. The reset function also allows for an external push-button override.

Key Features

Real-Time Clock Counts Seconds Through Centuries in BCD Format
- bq4802Y: 5-V Operation
- bq4802LY: 3.3-V Operation
On-Chip Battery-Backup Switchover Circuit With Nonvolatile Control for External SRAM
Less Than 500 nA of Clock Operation Current in Backup Mode
Microprocessor Reset With Push-Button Override
Independent Watchdog Timer With Programmable Time-Out Period
Power-Fail Interrupt Warning
Programmable Clock Alarm Interrupt Active in Battery-Backup Mode
Programmable Periodic Interrupt
Battery-Low Warning
28-pin SOIC, TSSOP, and SNAPHAT Package Options
APPLICATIONS
- Telecommunications Base Stations
- Servers
- Handheld Data Collection Equipment
- Medical Equipment
- Handheld Instrumentation
- Test Equipment

Specifications

Category	Integrated Circuits (ICs)Clock/TimingReal Time Clocks	Series	-
Programmable	Not Verified	Type	Clock/Calendar
Features	Alarm, Daylight Savings, Leap Year, Supervisor, Watchdog Timer	Memory Size	-
Time Format	HH:MM:SS (12/24 hr)	Date Format	YY-MM-DD-dd
Interface	Parallel	Voltage - Supply	2.7V ~ 3.6V
Voltage - Supply, Battery	2.4V ~ 4V	Current - Timekeeping (Max)	1.5mA (Typ) @ 2.7 V ~ 3.6 V
Operating Temperature	0°C ~ 70°C	Mounting Type	Surface Mount
Base Product Number	BQ4802

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Ratings and Reviews

D**n 11/09/2023

The fee was received, in appearance quality. There's no way to check.

L**a 07/11/2023

Delivery to peter in 86 days. No track. Put it in the mailbox. The number and denominations correspond. Signed. I recommend the seller and the product.

D**n 07/04/2023

Order received. Until i checked.

C**a 12/15/2020

I haven't checked yet! Looks all beautiful, neat!