Maxim DS3232SN#T&R

时钟/日历警报器，闰年，方波输出，SRAM，TCXO/晶体236B

Overview

The DS3232SN is a low-cost temperature-compensated crystal oscillator (TCXO) with a very accurate, temperature-compensated, integrated real-time clock (RTC) and 236 bytes of battery-backed SRAM. Additionally, the DS3232SN incorporates a battery input and maintains accurate timekeeping when main power to the device is interrupted. The integration of the crystal resonator enhances the long-term accuracy of the device as well as reduces the piece-part count in a manufacturing line. The DS3232SN is available in commercial and industrial temperature ranges, and is offered in an industry-standard 20-pin, 300-mil SO package. The RTC maintains 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 the 24-hour or 12-hour format with an active-low AM/PM indicator. Two programmable time-of-day alarms and a programmable square-wave output are provided. Address and data are transferred serially through an I2C bidirectional bus. A precision temperature-compensated voltage reference and comparator circuit monitors the status of VCC to detect power failures, to provide a reset output, and to automatically switch to the backup supply when necessary. Additionally, the active-low RST pin is monitored as a pushbutton input for generating a μP reset.

Features

Tape & Reel (TR) Package
Clock/Calendar Type
Alarm, Leap Year, Square Wave Output, SRAM, TCXO/Crystal Features
236B Memory Size
HH:MM:SS (12/24 hr) Time Format
2.3V ~ 5.5V Voltage - Supply
2.3V ~ 5.5V Voltage - Supply, Battery
120µA ~ 160µA @ 3.3V ~ 5.5V Current - Timekeeping (Max)
Surface Mount Mounting Type