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DS1672: I²C 32-Bit Binary Counter RTC Data Sheet (Rev. 5)10/11/2011PDF191K
Overview
Features and Benefits
- 32-Bit Counter
- I²C Serial Interface
- Automatic Power-Fail Detect and Switch Circuitry
- Power-Fail Reset Output
- Low-Voltage Oscillator Operation (1.3V min)
- Trickle-Charge Capability
Product Details
The DS1672 low-voltage serial timekeeping chip incorporates a 32-bit counter and power-monitoring functions. The 32-bit counter is designed to count seconds and can be used to derive time-of-day, week, month, and year by using a software algorithm. A precision, temperature-compensated reference and comparator circuit monitors the status of VCC. When an out-of-tolerance condition occurs, an internal power-fail signal is generated that forces the reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for 250ms to allow the power supply and processor to stabilize.
Product Categories
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
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DS1672 Reliability Data1/12/2023PDF10K
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Oscillator Design Considerations for Low-Current Applications1/26/2011
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Selecting a Backup Source for Real-Time Clocks5/26/2006
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Estimating Super Capacitor Backup Time on Trickle-Charger Real-Time Clocks5/24/2005
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DS1371/DS1372/DS1374 32-Bit Binary Counter Time Conversion3/21/2003
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Using the DS1672 Low-Voltage Serial Timekeeping IC8/27/2002
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Using the DS32kHz with Maxim Real-Time Clocks2/15/2002
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Design Considerations for Maxim Real-Time Clocks2/15/2002
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Crystal Considerations with Maxim Real-Time Clocks (RTCs)3/29/2001
Tools & Simulations
IBIS Models
Design Resources
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