DS1816-10+T
DS1816-10+T Datasheet
DS1816 3.3V EconoReset with
| Part | Datasheet |
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DS1816-10+T |
DS1816-10+T (pdf) |
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| DS1816 3.3V EconoReset with Open Drain Output § Automatically restarts a microprocessor after power failure § Maintains reset for 150ms after VCC returns to an in-tolerance condition § Reduces need for discrete components § Precision temperature-compensated voltage reference and voltage sensor § Accurate 5%, 10% or 20% power monitoring § 20% tolerance for use with 3V systems § Low-cost TO-92 or space saving SOT-23 packages available § Efficient open-drain output with internal 5kW pull-up resistor § Operating temperature -40°C to +85°C PIN ASSIGNMENT DALLAS DS1816 Econo Reset BOTTOM VIEW TO-92 PACKAGE See Mech. Drawings Section On Website TOP VIEW SOT-23 PACKAGE See Mech. Drawings Section On Website PIN DESCRIPTION TO-92 1 RST 2 VCC 3 GND Active Low Reset Output Power Supply Ground SOT-23 1 RST 2 VCC 3 GND Active Low Reset Output Power Supply Ground The DS1816 EconoReset uses a precision temperature reference and comparator circuit to monitor the status of the power supply VCC . When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for approximately 150ms to allow the power supply and processor to stabilize. 1 of 5 041002 DS1816 OPERATION POWER MONITOR The DS1816 provides the function of detecting out-of-tolerance power supply conditions and warning a processor-based system of impending power failure. When VCC is detected as out-of-tolerance, the RST signal is asserted. On power-up, RST is kept active for approximately 150ms after the power supply has reached the selected tolerance. This allows the power supply and microprocessor to stabilize before RST is released. BLOCK DIAGRAM OPEN-DRAIN OUTPUT Figure 1 APPLICATION EXAMPLE Figure 2 2 of 5 TIMING DIAGRAM POWER-UP Figure 3 DS1816 TIMING DIAGRAM POWER-DOWN Figure 4 3 of 5 ABSOLUTE MAXIMUM RATINGS* Voltage on VCC Pin Relative to Ground |
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