DS1672U-33+

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DS1672U-33+

+BOM

IC RTC BINARY CNT I2C 8-USOP

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Specifications

Attribute Value
Supplier Rochester Electronics, LLC,Analog Devices Inc./Maxim Integrated
Package Tube,Tube
ProductStatus Obsolete
Type Binary Counter
Features Trickle-Charger
TimeFormat Binary
DateFormat Binary
Interface I²C, 2-Wire Serial
Voltage-Supply 2.97V ~ 3.63V
Voltage-SupplyBattery 1.3V ~ 3.63V
Current-Timekeeping(Max) 500µA @ 3.63V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 8-TSSOP, 8-MSOP (0.118, 3.00mm Width)

Overview

Description

DS1672U-33+ is a Dallas/Maxim low-power, battery-backed real-time clock/calendar (RTC) designed to keep accurate time even when main power is off. The 3.3V version (U-33+) uses a serial interface (I2C) to read/write time and control/status registers. Key features:
- Timekeeping: seconds, minutes, hours, day, date, month, year (with leap-year handling)
- Alarm and countdown/timer functions
- Programmable square-wave/interrupt output
- Battery-backup operation with optional trickle-charge for a backup cell
- Power-fail detection and automatic resume when power returns
Typical uses include data loggers, industrial controllers, automotive modules, and portable devices requiring time stamps. For exact register maps, timing, and integration details, consult the DS1672U-33+ datasheet and application notes.

Equivalent

Possible equivalents (RTC with battery-backed RAM/NVRAM):
- TI BQ32000
- ST M41T00 / M41T02
- NXP PCF8583 / PCF8584
- Microchip MCP79410 / MCP79423
- Maxim/Dallas DS1307 / DS1338
Note: interfaces (I2C/SPI), voltages and pinouts vary; verify against your board requirements and datasheets.

Pinout

8 pins. It is a 3.3V microprocessor supervisory IC with a watchdog timer and reset output (provides power-on/reset/power-fail monitoring for a CPU).

Manufacturer

Manufacturer: Dallas Semiconductor. It was a semiconductor company that designs and manufactures integrated circuits (memory, timing devices, and related ICs); it is now part of Maxim Integrated (and, subsequently, Analog Devices).

Application

Applications areas for DS1672U-33+ (timing/health monitoring IC):
- Real-time clocking and time-stamping in embedded systems and data loggers
- System watchdog and fault-detection to improve reliability
- Power-fail/brown-out monitoring with controlled reset/shutdown
- Event logging and scheduling in industrial controllers, automation, and smart meters
- Automotive electronics requiring reliable timing and safety features
- Networking/telecom equipment needing uptime and accurate timing bases
- Medical devices needing low-power, accurate timing and monitoring
Note: Use cases based on its timing, watchdog, and power-monitor capabilities.

Package

DS1672U-33+ is available in an 8-pin Small Outline (SO-8) surface-mount package.

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