Maxim DS1647P-120

时钟/日历闰年，NVSRAM512KB

Overview

The DS1647P-120 is a 512k x 8 nonvolatile static RAM with a full-function real-time clock, which are both accessible in a byte-wide format. The nonvolatile timekeeping RAM is functionally equivalent to any JEDEC standard 512k x 8 SRAM. The device can also be easily substituted for ROM, EPROM and EEPROM, providing read/write nonvolatility and the addition of the real-time clock function.

■ Integrates NV SRAM, real-time clock, crystal, power-fail control circuit and lithium energy source■ Clock registers are accessed identically to the static RAM. These registers are resident in the eight top RAM locations■ Totally nonvolatile with over 10 years of operation in the absence of power■ BCD coded year, month, date, day, hours, minutes, and seconds with leap year compensation valid up to 2100■ Power-fail write protection allows for ±10% VCC power supply tolerance■ DS1647 only (DIP Module) - Standard JEDEC byte-wide 128k x 8 RAM pinout■ DS1647P only (PowerCap® Module Board) - Surface mountable package for direct connection to PowerCap containing battery and crystal - Replaceable battery (PowerCap) - Power-fail output - Pin-for-pin compatible with other densities of DS164XP Timekeeping RAM

Features

Tube Package
34-PowerCap™ Module package
34 terminations
34 pin count
5V power supplies

Surface Mount Mounting Type

Applications

There are a lot of Maxim Integrated
DS1647P-120+ Real Time Clocks applications.

• Industrial
• Digital still camera
• Digital video camera
• Printers
• Copy machines
• Mobile equipment
• Battery powered devices
• Printers and copiers
• Electronic metering
• Digital cameras