DS2224 - Dallas Semiconducotr

DS2224 EconoRAM

The DS2223 and DS2224 EconoRAMs are fully static, micro–powered, read/write memories in low–cost TO–92 or SOT–223 packages. The DS2223 is organized as a serial 256 x 1 bit static read/write memory. The DS2224’s first 32 bits are lasered with a unique ID code at the time of manufacture; the remaining 224 bits are static read/write memory. Signaling necessary .

Features

PACKAGE OUTLINE TO
  –92
• Low
  –cost, general
  –purpose, 256
  –bit memory
  – DS2223 has 256
  –bit SRAM
  – DS2224 has 32
  –bit ROM, 224
  –bit SRAM
• Reduces single pin control, address and data interface to a
• Each DS2224 32
  –bit ROM is factory
  –lasered with a unique serial number
• DS2224 portion of ROM with custom code and unique serial number available SOT
  –223 1 1 2 3
• Minimal operating power: 45 nanocoulombs per transaction @1.5V typical
• Less than 15 nA standby current at 25°C
• Nonvolatile data 1 2 3 2 BOTTOM VIEW See Mech. Drawings Section 4 3 retention easily achieved via low
  – cost alkaline .