Integrated Circuits (ICs)

BQ3285LFSS-A1TRG4

Obsolete

Texas Instruments

REAL TIME CLOCK MULTIPLEXED 242BYTE CLOCK/CALENDAR/ALARM/TIMER/INTERRUPT 24-PIN SSOP T/R

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Integrated Circuits (ICs)

BQ3285LFSS-A1TRG4

Obsolete

Texas Instruments

REAL TIME CLOCK MULTIPLEXED 242BYTE CLOCK/CALENDAR/ALARM/TIMER/INTERRUPT 24-PIN SSOP T/R

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	BQ3285LFSS-A1TRG4

Features	Alarm, Square Wave Output, Leap Year, Daylight Savings, NVSRAM
Interface	Parallel
Memory Size	242 B
Mounting Type	Surface Mount
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Package / Case	24-SSOP
Package / Case [custom]	0.154 ", 3.9 mm
Supplier Device Package	24-SSOP
Time Format	HH:MM:SS (12/24 hr)
Type	Clock/Calendar
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.7 V
Voltage - Supply, Battery [Max]	4 V
Voltage - Supply, Battery [Min]	2.4 V

BQ3285E Series

RTC IC with 242x8 NVSRAM Alarm Wake-up

Part	Mounting Type	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Features	Type	Package / Case	Package / Case	Package / Case	Memory Size	Voltage - Supply [Min]	Voltage - Supply [Max]	Supplier Device Package	Time Format	Package / Case [custom]	Current - Timekeeping (Max) [Max]	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Package / Case [custom]
Texas Instruments BQ3285P-SB2E3	Through Hole	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-DIP	0.6 in	15.24 mm	114 B	4.5 V	5.5 V	24-PDIP	HH:MM:SS (12/24 hr)
Texas Instruments BQ3285ESSTR	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SSOP			242 B	4.5 V	5.5 V	24-SSOP	HH:MM:SS (12/24 hr)	0.154 " 3.9 mm	300 µA
Texas Instruments BQ3285LFSS-A1TRG4	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SSOP			242 B	2.7 V	5.5 V	24-SSOP	HH:MM:SS (12/24 hr)	0.154 " 3.9 mm		4 V	2.4 V
Texas Instruments BQ3285ESTR	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SOIC			242 B	4.5 V	5.5 V	24-SOIC	HH:MM:SS (12/24 hr)	7.5 mm	300 µA			0.295 in
Texas Instruments BQ3285P-SB2	Through Hole	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-DIP	0.6 in	15.24 mm	114 B	4.5 V	5.5 V	24-PDIP	HH:MM:SS (12/24 hr)
Texas Instruments BQ3285EP	Through Hole	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-DIP	0.6 in	15.24 mm	242 B	4.5 V	5.5 V	24-PDIP	HH:MM:SS (12/24 hr)		300 µA
Texas Instruments BQ3285LDSS	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings NVSRAM	Clock/Calendar	24-SSOP			242 B	2.7 V	5.5 V	24-SSOP	HH:MM:SS (12/24 hr)	0.154 " 3.9 mm		4 V	2.4 V
Texas Instruments BQ3285S-SB2	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SOIC			114 B	4.5 V	5.5 V	24-SOIC	HH:MM:SS (12/24 hr)	7.5 mm				0.295 in
Texas Instruments BQ3285LSS	Surface Mount	Parallel			Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SSOP			242 B	2.7 V	3.6 V	24-SSOP	HH:MM:SS (12/24 hr)	0.154 " 3.9 mm		4 V	2.4 V
Texas Instruments BQ3285S-SB2TRG4	Surface Mount	Parallel	70 °C	0 °C	Alarm Daylight Savings Leap Year NVSRAM Square Wave Output	Clock/Calendar	24-SOIC			114 B	4.5 V	5.5 V	24-SOIC	HH:MM:SS (12/24 hr)	7.5 mm				0.295 in

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Description

General part information

BQ3285E Series

The CMOS bq3285E/L is a low-power microprocessor peripheral providing a time-of-day clock and 100-year calendar with alarm features and battery operation. The bq3285L supports 3V systems. Other bq3285E/L features include three maskable interrupt sources, square-wave output, and 242 bytes of general nonvolatile storage.

A 32.768kHz output is available for sustaining power-management activities. Wake-up capability is provided by an alarm interrupt, which is active in battery-backup mode.

The bq3285E/L write-protects the clock, calendar, and storage registers during power failure. A backup battery then maintains data and operates the clock and calendar.

Documents

Technical documentation and resources