Electronic Components Datasheet Search |
|
ADM809-5SCHIPS Datasheet(PDF) 5 Page - Analog Devices |
|
ADM809-5SCHIPS Datasheet(HTML) 5 Page - Analog Devices |
5 / 6 page ADM809-5S/L –5– REV. 0 INTERFACING TO OTHER DEVICES OUTPUT The ADM809-5S/L is designed to integrate with as many devices as possible and therefore has an output dependant on VCC. Because of this design approach, interfacing this device to other devices is simplified. ENSURING A VALID RESET OUTPUT DOWN TO VCC = 0 V When VCC falls below 0.8 V, ADM809-5S/L’s RESET no longer sinks current. A high impedance CMOS logic input connected to RESET may, therefore, drift to undetermined logic levels. To eliminate this problem a 100 k Ω resistor should be connected from RESET to ground. VCC VCC GND RESET ADM809-5S/L 100k Figure 3. Ensuring a Valid RESET Output Down to VCC = 0 V THE BENEFITS OF A VERY ACCURATE RESET THRESHOLD In other microprocessor supervisory circuits, tolerances in supply voltages lead to an overall increase in RESET tolerance levels due to the deterioration of the microprocessor RESET circuit’s power supply. The possibility of a malfunction during a power failure is greatly reduced because the ADM809-5S/L series can operate effectively even when there are large degradations of the supply voltages. Another advantage of the ADM809-5S/L series is its very accurate internal voltage reference circuit. These benefits combine to produce an exceptionally reliable Voltage Monitor Circuit. INTERFACING TO MICROPROCESSORS WITH MULTIPLE INTERRUPTS In a number of cases it is necessary to interface many interrupts from different devices (i.e., thermal, attitude, and velocity sen- sors). The ADM809-5S/L can easily be integrated into existing interrupt-handling circuits (Figure 6) or used as a stand-alone device. PRIORITY ENCODER 74LS147 4 LINE BCD TO µP VCC ADM809 GND RESET OTHER SENSING DEVICES VCC Figure 4. Interfacing to µPs with Multiple Interrupts 47k 47k 100nF 3.3V VCC GND RESET ADM809-5S/L Figure 5. Alternative Application Circuit with Extra Decoupling 22k 100nF 3.3V VCC GND RESET ADM809-5S/L Figure 6. Additional Decoupling Can Be Achieved Using a 100 nF Capacitor Between VCC and Ground |
Similar Part No. - ADM809-5SCHIPS |
|
Similar Description - ADM809-5SCHIPS |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |