Datasheet ADM803, ADM809, ADM810 (Analog Devices)
|Beschreibung||Microprocessor Supervisory Circuits in 3-Lead SC70 and SOT-23|
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Microprocessor Supervisory Circuits. in 3-Lead SC70 and SOT-23. Data Sheet. ADM803/. ADM809/. ADM810. FEATURES
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Microprocessor Supervisory Circuits in 3-Lead SC70 and SOT-23 Data Sheet ADM803/ ADM809/ ADM810 FEATURES FUNCTIONAL BLOCK DIAGRAMS Specified over temperature Low power consumption: 17 μA ADM803 Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options VCC RESET Reset assertion down to 1 V V RESET CC GENERATOR V 140 ms minimum power-on reset REF 240ms Open-drain RESET output (ADM803) Push-pull RESET output (ADM809) GND Push-pull RESET output (ADM810) SC70 and SOT-23 packages ADM809/ADM810 APPLICATIONS Microprocessor systems RESET VCC RESET Computers GENERATOR (RESET) 240ms VREF Controllers Intelligent instruments GND VCC VCC *R V PULL-UP CC MICROPROCESSOR ADM803/ADM809 SYSTEM RESET RESET INPUT GND GND
03736- Figure 1.
The ADM803/ADM809/ADM810 supervisory circuits monitor Seven reset threshold voltage options are available, suitable for the power supply voltage in microprocessor systems. They monitoring a variety of supply voltages (see Table 3). provide a reset output during power-up, power-down, and The reset comparator features built-in glitch immunity, making brownout conditions. On power-up, an internal timer holds it immune to fast transients on VCC. reset asserted for 240 ms. This holds the microprocessor in a reset state until conditions have stabilized. The reset output The ADM803/ADM809/ADM810 consume only 17 μA, making remains operational with V them suitable for low power, portable equipment. The ADM803 CC as low as 1 V. The ADM803 and ADM809 provide an active low reset signal (RESET), whereas is available in a 3-lead SC70; the ADM809/ADM810 are available the ADM810 provides an active high signal (RESET) output. in 3-lead SOT-23 and 3-lead SC70 packages. The ADM809 and ADM810 have push-pull outputs, whereas the ADM803 has an open-drain output, which requires an external pul -up resistor.
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Document Outline FEATURES APPLICATIONS FUNCTIONAL BLOCK DIAGRAMS GENERAL DESCRIPTION TABLE OF CONTENTS REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS ESD CAUTION PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS INTERFACING TO OTHER DEVICES ENSURING A VALID RESET OUTPUT DOWN TO VCC = 0 V BENEFITS OF AN ACCURATE RESET THRESHOLD INTERFACING TO MICROPROCESSORS WITH MULTIPLE INTERRUPTS OUTLINE DIMENSIONS ORDERING GUIDE