The DS3070W consists of a static RAM, a nonvolatile (NV) controller, a year 2000-compliant real-time clock (RTC), and an internal rechargeable manganese lithium (ML) battery. These components are encased in a surface-mount module with a 256-ball BGA footprint. Whenever VCC is applied to the module, it recharges the ML battery, powers the clock and SRAM from the external power source, and allows the contents of the clock registers or SRAM to be modified. When VCC is powered down or out-of-tolerance, the controller write protects the memory contents and powers the clock and SRAM from the battery. The DS3070W also contains a power-supply monitor output (RST-bar), as well as a user-programmable interrupt output (IRQ-bar/FT).
Key Features
Applications/Uses
Single-Piece, Reflowable, 27mm x 27mm BGA Package Footprint
Integrated RTC
Internal ML Battery and Charger
Unconditionally Write-Protects SRAM when VCC is Out-of-Tolerance
Automatically Switches to Battery Supply when VCC Power Failures Occur
Internal Power-Supply Monitor Detects Power Fail Below Nominal VCC (3.3V)
Reset Output can be Used as a CPU Supervisor for a Microprocessor
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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