DS1340
PRODUCTIONI²C RTC with Trickle Charger
I²C Real-Time Clock with Trickle Charger Offers Software Clock Calibration
- Part Models
- 14
- 1ku List Price
- Starting From $2.50
Overview
- Enhanced Second Source for the ST M41T00
- Completely Manages All Timekeeping Functions
- RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year
- Software Clock Calibration
- Oscillator Stop Flag
- Low-Power Operation Extends Battery Backup Run Time
- Low Timekeeping Voltage Down to 1.3V
- Automatic Power-Fail Detect and Switch Circuitry
- Trickle-Charge Capability
- Three Operating Voltage Ranges (1.8V, 3V, and 3.3V) Supports Systems Using Legacy and Modern Power Buses
- Surface-Mount Package with an Integrated Crystal (DS1340C) Saves Additional Space and Simplifies Design
- Simple Serial Port Interfaces with Most Microcontrollers
- Fast (400kHz) I2C Interface
- 8-Pin µSOP or SO Package Minimizes Required Space
- Underwriters Laboratories (UL®) Recognized
The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration. The device additionally provides trickle-charge capability on the VBACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional registers, which are accessed individually, are required for the trickle charger and flag. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the backup supply. The device is programmed serially through an I²C bidirectional bus.
Applications
- Medical Equipment
- Point-of-Sale Equipment
- Portable Instrumentation
- Telecommunications
Documentation
Data Sheet 1
Reliability Data 1
Design Note 8
Technical Articles 6
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| DS1340C-18# | 16-SOIC_W-300_MIL | ||
| DS1340C-3# | 16-SOIC_W-300_MIL | ||
| DS1340C-33# | 16-SOIC_W-300_MIL | ||
| DS1340C-33#T&R | 16-SOIC_W-300_MIL | ||
| DS1340U-18+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1340U-3+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1340U-3+T&R | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1340U-33+ | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1340U-33+T&R | Micro-MAX, Thin Shrink Small-Outline | ||
| DS1340Z-18+ | Small-Outline IC, Narrow (0.15in) | ||
| DS1340Z-3+ | Small-Outline IC, Narrow (0.15in) | ||
| DS1340Z-3+T&R | Small-Outline IC, Narrow (0.15in) | ||
| DS1340Z-33+ | Small-Outline IC, Narrow (0.15in) | ||
| DS1340Z-33+T&R | Small-Outline IC, Narrow (0.15in) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Sep 19, 2018 - 1753N ASSEMBLY |
||
| DS1340U-18+ | PRODUCTION | |
| DS1340U-3+ | PRODUCTION | |
| DS1340U-3+T&R | PRODUCTION | |
|
May 22, 2018 - 1702N ASSEMBLY |
||
| DS1340Z-18+ | PRODUCTION | |
| DS1340Z-3+ | PRODUCTION | |
| DS1340Z-3+T&R | PRODUCTION | |
|
Oct 30, 2020 - 1702R2 ASSEMBLY |
||
| DS1340Z-33+ | PRODUCTION | |
| DS1340Z-33+T&R | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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