DS1340Z-33+T&R Real Time Clock I C RTC with Trickle Charger DRV5032FBDBZR DRV8601ZQVR DS0321SR25MHZ DS1302S+ DS1302SN DS1340 I2 C RTC with Trickle Charger

General Description
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 V BACKUP pin, a lower timekeeping voltage, and an oscillator STOP flag. Block access of the register map is identical to the ST device. Two additional regis- ters, which are accessed individually, are required for the trickle charger and flag. The clock/calendar pro- vides seconds, minutes, hours, day, date, month, and year information. A built-in power-sense circuit detects power failures and automatically switches to the back- up supply. Reads and writes are inhibited while the clock continues to run. The device is programmed seri- ally through an I2C bidirectional bus.

Applications
Portable Instruments
Point-of-Sale Equipment
Medical Equipment
Telecommunications

Benefits and Features
• 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) I2 C Interface
• 8-Pin μSOP or SO Package Minimizes Required
Space
• Underwriters Laboratories (UL ®) Recognized

Ordering Information

DS1340C-18# DS1340C-3# DS1340C-33# DS1340C-33#T&R DS1340U-18+ DS1340U-3+ DS1340U-3+T&R
DS1340U-33+T&R DS1340Z-18+ DS1340Z-3+ DS1340Z-3+T&R DS1340Z-33+T&R DS1340U-33+ DS1340Z-33+

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LU'S TECHNOLOGY CO., Ltd. (LU’S) was established in 2014. One of the largest electronic components distributors in Hongkong and Shenzhen, China.

LU’S provides a full range of services for long-term orders, providing design-chain service, with a complete electronic components supply and distribute system.

Component categories include active components (IC integrated circuits, memory chips, diodes, transistors, etc.) and passive components (capacitors, resistors, inductors, etc.) and electromechanical components (connectors, switching devices, etc.).

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