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DS1670 Datasheet(PDF) 7 Page - Dallas Semiconductor

Part # DS1670
Description  Portable System Controller
PDF  17 Pages
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Manufacturer  DALLAS [Dallas Semiconductor]
Direct Link  https://www.maximintegrated.com/en.html
Logo DALLAS - Dallas Semiconductor

DS1670 Datasheet(HTML) 7 Page - Dallas Semiconductor

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DS1670
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The DS1670 nonvolatilizes the external SRAM(s) by write protecting the SRAM(s) and by providing a
back-up power supply in the absence of VCC. When VCC falls below 2.88 volts (typical), access to the
external SRAM(s) are prohibited by forcing CEOL and CEOH high regardless of the level of CEI , BLE ,
and BHE . Also at this point, the SRAM power supply (VCCO) is switched from VCC to VBAT. Upon
power up, access is prohibited until the end of tRPU.



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