DS1342U+ by Analog Devices

Low-Current I²C RTCs for High-ESR Crystals

Status: Active
Series: DS1342
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The DS1341/DS1342 low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, which permits longer life from a power supply. The DS1341/DS1342 support high-ESR crystals, which broaden the pool of usable crystals for the devices. The DS1341 uses a 6pF crystal, while the DS1342 uses a 12.5pF crystal. These devices are accessed through an I²C serial interface. Other features include two time-of-day alarms, two interrupt outputs, a programmable square-wave output, and a serial bus timeout mechanism. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The date at the end of the month is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either 24hr or 12hr format with an AM/PM indicator. The DS1341/DS1342 also include an input for synchronization. When a reference clock (e.g., 60Hz power line or GPS 1PPS) is present at the CLKIN pin and the enable external clock input bit (ECLK) is set to 1, the DS1341/DS1342 RTCs are frequency-locked to the external clock and the clock accuracy is determined by the external source. In case of external clock failure, the clock is switched to the crystal oscillator. The devices are available in lead(Pb)-free/RoHS-compliant, 8-pin µSOP or TDFN packages. The devices support a -40°C to +85°C extended temperature range.

Prices starting from US$1.92


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$2.60
541
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Logo for element14 element14 US$2.04
541
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Features

Low Timekeeping Current of 250nA (typ)
Compatible with Crystal ESR Up to 100kΩ
Use Crystals with CL = 6pF (DS1341) or CL= 12.5pF (DS1342)
+1.8V to +5.5V Operating Voltage Range
Maintain Time Down to +1.15V (typ)
Fast (400kHz) I²C Interface
Bus Timeout for Lockup-Free Operation
RTC Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year Compensation Valid Through 2099
External Clock Source for Synchronization Clock Reference (e.g., 32kHz, 50Hz/60Hz Power Line, GPS 1PPS)
Two Time-of-Day Alarm with Two Interrupt Outputs
Programmable Square-Wave Output
Industrial Temperature Range (-40°C to +85°C)
Small, 8-Pin µSOP or TDFN Packages

Specifications

Interface I2C
VSUPPLY (V) 1.85.5
Date/ Time Format (hh = sec/100) YY-MM-DD/ HH:MM:SS
Time Keeping Current (nA) (typ) 250
CL (pF) 12.5
Memory Type None
Time of Day Alarms 2
Package/Pins TDFN/8UMAX/8
BudgetaryPrice (See Notes) 1.46


DS1342U+ Semiconductors - ICs by Analog Devices

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

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

Specifications

Date Format Day
Clock Format HH
Clock IC Type Alarm RTC
Supply Voltage Min 1.8V
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

Rtc, D-D-M-Y, Hh:Mm:Ss, Usop-8 | Newark Electronics
RTC, D-D-M-Y, HH:MM:SS, USOP-8 | element14
RTC, D-D-M-Y, HH: MM: SS, USOP-8 | Farnell

Frequently Asked Questions

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Is the DS1342U+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS1342U+ have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for DS1342U+ .

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