DS1340U-3+ by Analog Devices

I²C RTC with Trickle Charger

Status: Active
Series: DS1340, DS1340C
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

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.

Where to Buy

Prices starting from US$2.90

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Farnell
from US$4.90
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Analog Devices
from US$2.93
5,234
in stock
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element14
from US$2.90
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Newark Electronics
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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
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
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
Fast (400kHz) I2C Interface
8-Pin µSOP or SO Package Minimizes Required Space
Underwriters Laboratories (UL®) Recognized

Specifications

Interface I2C
VSUPPLY (V) 1.71 to 5.5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 800
CL (pF) 12.5
Memory Type None
Time of Day Alarms 0
Package/Pins SOIC (N)/8SOIC (W)/16UMAX/8
BudgetaryPrice (See Notes) 1.85


DS1340U-3+ Semiconductors - ICs by Analog Devices

RTC D-D-M-Y HH:MM:SS USOP-8

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Date Format Day
Clock Format HH
Clock IC Type RTC
Supply Voltage Min 2.7V
Supply Voltage Max 5.5V
Clock IC Case Style µSOP
No. of Pins 8Pins
IC Interface Type I2C
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

I²C RTC with Trickle Charger | Analog Devices
RTC, D-D-M-Y, HH: MM: SS, USOP-8 | Farnell
Rtc, D-D-M-Y, Hh:Mm:Ss, Usop-8 | Newark Electronics

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DS1340U-3+ ?

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Is the DS1340U-3+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1340U-3+ have stock available?

Authorised distributors including Analog Devices, element14, Farnell and Newark Electronics have stock available or on a lead time for DS1340U-3+ .

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