Datasheet ADM803, ADM809, ADM810 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | Microprocessor Supervisory Circuits in 3-Lead SC70 and SOT-23 |
| Seiten / Seite | 11 / 8 — ADM803/ADM809/ADM810. Data Sheet. INTERFACING TO OTHER DEVICES. ENSURING … |
| Dateiformat / Größe | PDF / 211 Kb |
| Dokumentensprache | Englisch |
ADM803/ADM809/ADM810. Data Sheet. INTERFACING TO OTHER DEVICES. ENSURING A VALID RESET OUTPUT DOWN TO. VCC = 0 V
Modelllinie für dieses Datenblatt
- ADM803LAKSZ-REEL ADM803LAKSZ-REEL7 ADM803MAKSZ-REEL7 ADM803RAKSZ-REEL7 ADM803SAKSZ-REEL ADM803SAKSZ-REEL7 ADM803TAKSZ-REEL7 ADM803ZAKSZ-REEL7
- ADM809-5LARTZ-RL7 ADM809-5SAKSZ-RL7 ADM809-5SARTZ-RL7 ADM809JAKSZ-REEL7 ADM809JARTZ-REEL7 ADM809LAKSZ-REEL7 ADM809LARTZ-REEL ADM809LARTZ-REEL7 ADM809MARTZ-REEL ADM809MARTZ-REEL7 ADM809RAKSZ-REEL ADM809RAKSZ-REEL7 ADM809RARTZ-REEL7 ADM809SAKSZ-REEL7 ADM809SARTZ-REEL7 ADM809TAKSZ-REEL7 ADM809TARTZ-REEL ADM809TARTZ-REEL7 ADM809ZARTZ-REEL7
Textversion des Dokuments
link to page 8
ADM803/ADM809/ADM810 Data Sheet INTERFACING TO OTHER DEVICES
The ADM803/ADM809/ADM810 series is designed to integrate ADM803/ADM809/ADM810, the possibility of a malfunction with as many devices as possible and, therefore, has a standard during a power failure is greatly reduced because the devices output dependent on VCC. This enables the parts to be used in can operate effectively even when there are large degradations both 3 V and 5 V, or any nominal voltage within the minimum of the supply voltages. Another advantage is the very accurate and maximum specifications for VCC. This design simplifies internal voltage reference circuit of the ADM803/ADM809/ interfacing the ADM803/ADM809/ADM810 to other devices. ADM810. These benefits combine to produce an exceptionally
ENSURING A VALID RESET OUTPUT DOWN TO
reliable voltage monitor circuit.
VCC = 0 V INTERFACING TO MICROPROCESSORS WITH
When V
MULTIPLE INTERRUPTS
CC falls below 0.8 V, the ADM803/ADM809 RESET no longer sinks current. A high impedance CMOS logic input In a number of cases, it is necessary to interface many interrupts connected to RESET may, therefore, drift to undetermined logic from different devices (for example, thermal, altitude, and levels. To eliminate this problem, a 100 kΩ resistor should be velocity sensors). The ADM803/ADM809/ADM810 can easily connected from RESET to ground. be integrated into existing interrupt-handling circuits, as shown in Figure 13, or can be used as standalone devices.
VCC VCC PRIORITY ENCODER 4-LINE BCD TO MICROPROCESSOR 74LS147 ADM809 VCC RESET VCC ADM809 GND RESET OTHER SENSING
11 0
DEVICES
6- 373 0 Figure 12. Ensuring a Valid Reset Output Down to VCC = 0 V
GND BENEFITS OF AN ACCURATE RESET THRESHOLD
2 -01 736 In other microprocessors, tolerances in supply voltages lead 03 to an overall increase in reset tolerance levels due to the Figure 13. Interfacing to Microprocessors with Multiple Interrupts deterioration of the reset circuit’s power supply. In the Rev. I | Page 8 of 11 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
ADM803/ADM809/ADM810 Data Sheet INTERFACING TO OTHER DEVICES
The ADM803/ADM809/ADM810 series is designed to integrate ADM803/ADM809/ADM810, the possibility of a malfunction with as many devices as possible and, therefore, has a standard during a power failure is greatly reduced because the devices output dependent on VCC. This enables the parts to be used in can operate effectively even when there are large degradations both 3 V and 5 V, or any nominal voltage within the minimum of the supply voltages. Another advantage is the very accurate and maximum specifications for VCC. This design simplifies internal voltage reference circuit of the ADM803/ADM809/ interfacing the ADM803/ADM809/ADM810 to other devices. ADM810. These benefits combine to produce an exceptionally
ENSURING A VALID RESET OUTPUT DOWN TO
reliable voltage monitor circuit.
VCC = 0 V INTERFACING TO MICROPROCESSORS WITH
When V
MULTIPLE INTERRUPTS
CC falls below 0.8 V, the ADM803/ADM809 RESET no longer sinks current. A high impedance CMOS logic input In a number of cases, it is necessary to interface many interrupts connected to RESET may, therefore, drift to undetermined logic from different devices (for example, thermal, altitude, and levels. To eliminate this problem, a 100 kΩ resistor should be velocity sensors). The ADM803/ADM809/ADM810 can easily connected from RESET to ground. be integrated into existing interrupt-handling circuits, as shown in Figure 13, or can be used as standalone devices.
VCC VCC PRIORITY ENCODER 4-LINE BCD TO MICROPROCESSOR 74LS147 ADM809 VCC RESET VCC ADM809 GND RESET OTHER SENSING
11 0
DEVICES
6- 373 0 Figure 12. Ensuring a Valid Reset Output Down to VCC = 0 V
GND BENEFITS OF AN ACCURATE RESET THRESHOLD
2 -01 736 In other microprocessors, tolerances in supply voltages lead 03 to an overall increase in reset tolerance levels due to the Figure 13. Interfacing to Microprocessors with Multiple Interrupts deterioration of the reset circuit’s power supply. In the Rev. I | Page 8 of 11 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