Maxim DS1344D-33+T&R

时钟/日历警报器，闰年，NVRAM，方波输出，涓流充电器96B

Overview

The DS1343/DS1344D-33+ low-current real-time clocks (RTCs) are timekeeping devices that provide an extremely low standby current, permitting longer life from a backup supply source. The devices also support high-ESR crystals, broadening the pool of usable crystals for the devices. 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 24-hour or 12-hour format with an active-low AM/PM indicator. Address and data are transferred serially through an SPI or 3-wire interface. Two programmable time-of-day alarms are provided. Each alarm can generate an interrupt on a combination of seconds, minutes, hours, and day. Don't-care states can be inserted into one or more fields if it is desired for them to be ignored for the alarm condition. The time-of-day alarms can be programmed to assert two different interrupt outputs, or they can be combined to assert one common interrupt output. Both interrupt outputs operate when the device is powered by either VCC or VBAT. The devices are available in a lead-free/RoHS-compliant, 20-pin TSSOP or 14-pin TDFN package, and support a -40°C to +85°C extended industrial temperature range.

Features

Tape & Reel (TR) Package
Clock/Calendar Type
Alarm, Leap Year, NVRAM, Square Wave Output, Trickle Charger Features
96B Memory Size
HH:MM:SS (12/24 hr) Time Format
SPI Interface
3V ~ 5.5V Voltage - Supply
1.3V ~ 5.5V Voltage - Supply, Battery
120µA ~ 160µA @ 3.63V ~ 5.5V Current - Timekeeping (Max)
Surface Mount Mounting Type