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BQ3285LFSS-A1TR The BQ3285LFSS-A1TR is a real-time clock/calendar IC from Texas Instruments. It offers 242 bytes of nonvolatile RAM, a parallel interface, and 2.7V to 3.6V operation in a 24-SSOP package.
Mfr Part #:

BQ3285LFSS-A1TR

Available from 3 distributors
Mfr Name: Texas Instruments
Texas Instruments
The BQ3285LFSS-A1TR is a real-time clock/calendar IC from Texas Instruments. It offers 242 bytes of nonvolatile RAM, a parallel interface, and 2.7V to 3.6V operation in a 24-SSOP package.
✓ Total Stock: 10,125 pcs

BQ3285LFSS-A1TR Available from 3 distributors

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✓ Non-Authorised
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Optech Co.,Limited ✓
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8,500 pcs
On Request
8500 pcs On Request 1 On Request On Request 0427+ On Request On Request
PROSOFT ELECTRONICS ✓
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1,464 pcs
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1464 pcs On Request 1 On Request On Request 04+ On Request On Request
Smaxon Electronics ✓
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161 pcs
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161 pcs On Request 1 On Request On Request 07+ On Request On Request
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BQ3285LFSS-A1TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
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Current
Date Format
Features
Interface
Lead Style
Memory Size
Mounting Type
Number of Pins
Operating Temperature
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Tape & Reel
Time Format
Type
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BQ3285LFSS-A1TR Description

Short technical summary and product information.

The BQ3285LFSS-A1TR is a real-time clock (RTC) and calendar IC from Texas Instruments, designed as a direct replacement for IBM AT-compatible computer clock/calendar functions. It provides time-of-day and calendar tracking with automatic leap-year adjustment and optional daylight saving. The device includes 242 bytes of general nonvolatile storage for system data.

 

The RTC operates from a 2.7V to 3.6V supply and typically draws 100µA at 3V. It communicates via a parallel interface with selectable Intel or Motorola bus timing. Date and time are available in BCD or binary format, with 12- or 24-hour time-of-day display. An alarm function can generate interrupts once per second to once per day.

 

Additional features include a programmable square wave output, a 32.768kHz output for power management, and system wake-up capability through the alarm interrupt active in battery-backup mode. The part is packaged in a 24-lead SSOP (0.154", 3.90mm width) for surface mount assembly and supports an operating temperature range of 0°C to 70°C.

BQ3285LFSS-A1TR Quick Information

Product Type: Real Time Clock (RTC)
Series: BQ3285
Canonical Name: Real-Time Clock (RTC) with Calendar and NVSRAM
Subcategory: Clock/Calendar

BQ3285LFSS-A1TR Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

BQ3285LFSS-A1TR Features

  • Real-time clock/calendar with alarm and NVSRAM.
  • 242 bytes of general nonvolatile storage.
  • Parallel interface with Intel or Motorola timing.
  • Operates from 2.7V to 3.6V supply.
  • 24-pin SSOP surface mount package.

BQ3285LFSS-A1TR Applications

  • IBM AT-compatible computer clock/calendar replacement.
  • Time-of-day alarm for system wake-up.
  • Power management with 32.768kHz output.
  • Battery-backed timekeeping in industrial controllers.
  • Nonvolatile storage for configuration data.

BQ3285LFSS-A1TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the BQ3285LFSS-A1TR?

The bq3285L variant operates from 2.7V to 3.6V.

What package is the BQ3285LFSS-A1TR available in?

It is available in a 24-SSOP (0.154", 3.90mm width) surface mount package.

What is the operating temperature range?

The operating temperature range is 0°C to 70°C.

Is the BQ3285LFSS-A1TR RoHS compliant?

RoHS3 compliant per existing product data, but this is unverified and low confidence.

How much memory does the BQ3285LFSS-A1TR provide?

It provides 242 bytes of general nonvolatile storage (NVSRAM).

What interface does the BQ3285LFSS-A1TR support?

It supports a parallel interface with selectable Intel or Motorola bus timing.

What is the typical supply current?

Typical supply current is 100µA at 3V.

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