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DS1218+

Memory NVRAM Controller, 1 RAM Controlled, 5V Supply, DIP-8

Date/Lot Code
MAXIM INTEGRATED / ANALOG DEVICES DS1218+
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Toote ülevaade

The DS1218+ from Maxim Integrated Products is a non-volatile controller in 8 pin DIP package. It is a CMOS circuit which solves the application problems of converting CMOS RAM into non-volatile memory. Incoming power is monitored for an out of tolerance condition. When such a condition is detected, the chip enable output is inhibited to accomplish write protection and the battery is switched on to supply RAM with uninterrupted power. Special circuitry uses a low-leakage CMOS process which affords precise voltage detection at extremely low battery consumption. The 8-pin package keeps PC board real estate requirements to a minimum. By combining the DS1218 non-volatile controller chip with a full CMOS memory and lithium batteries, 10 years of non-volatile RAM operation can be achieved.
  • Supply voltage range is 4.5V to 5.5V
  • Operating temperature range from 0°C to 70°C
  • Unconditionally write protects RAM when VCC is out of tolerance
  • Automatically switches to battery when power fail occurs
  • Consumes less than 100nA of battery current
  • 2V to 5.5V logic 1 and -0.3V to 0.8V logic 0 voltage
  • Battery supply voltage range from 2.5V to 3.5V
  • 2mA active current, 80mA RAM current (VCCO >= VCCI -0.2V)
  • 5pF input capacitance, 7pF output capacitance, 1.5µs active-low CE pulse width
  • Maximum 2ms recovery at power-up, 500µs VCC slew rate, 4ns active-low CE propagation delay

Rakendused

Embedded Design & Development

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:
1

:
5V

:
DIP

:
8Pins

:
0°C

:
70°C


:
MSL 1 - Unlimited

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CAD Models and drawings are provided to you on a revocable limited licence for your internal use only but remain the property of the manufacturer who retain all intellectual property rights and ownership. They are provided to assist you in decision making and as design guide but are not guaranteed to be error free, accurate or up to date and is not intended to be taken as advice.
Use of these CAD models and other options provided are downloaded and used entirely at your own risk and by continuing you confirm acceptance of the above.

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