Electronic Components Datasheet Search |
|
ADM812RARTZ-REEL7 Datasheet(PDF) 7 Page - Analog Devices |
|
ADM812RARTZ-REEL7 Datasheet(HTML) 7 Page - Analog Devices |
7 / 12 page Data Sheet ADM811/ADM812 Rev. G | Page 7 of 12 CIRCUIT INFORMATION RESET THRESHOLDS A reset output is provided to the microprocessor whenever the VCC input is below the reset threshold. The actual reset threshold depends on whether an L, M, T, S, R, or Z suffix is used (see Table 4). Table 4. Reset Threshold Options Model Reset Threshold (V) ADM811LART 4.63 ADM811MART 4.38 ADM811TART 3.08 ADM811-3TART 3.08 ADM811SART 2.93 ADM811RART 2.63 ADM811ZART 2.32 ADM812LART 4.63 ADM812MART 4.38 ADM812TART 3.08 ADM812SART 2.93 ADM812RART 2.63 ADM812ZART 2.32 RESET OUTPUT On power-up and after VCC rises above the reset threshold, an internal timer holds the reset output active for 240 ms (typical). This is intended as a power-on reset signal for the processor. It allows time for both the power supply and the microprocessor to stabilize after power-up. If a power supply brownout or interruption occurs, the reset output is similarly activated and remains active for 240 ms (typical) after the supply recovers. This allows time for the power supply and microprocessor to stabilize. The ADM811 provides an active low reset output (RESET) while the ADM812 provides an active high output (RESET). During power-down of the ADM811, the RESET output remains valid (low) with VCC as low as 1 V. This ensures that the microprocessor is held in a stable shutdown condition as the supply falls and also ensures that no spurious activity can occur via the microprocessor as it powers up. MANUAL RESET The ADM811/ADM812 are equipped with a manual reset input. This input is designed to operate in a noisy environment where unwanted glitches could be induced. These glitches could be produced by the bouncing action of a switch contact, or where a manual reset switch may be located some distance away from the circuit (the cabling of which can pick up noise). The manual reset input is guaranteed to ignore logically valid inputs that are faster than 100 ns and to accept inputs longer in duration than 10 µs. GLITCH IMMUNITY The ADM811/ADM812 contain internal filtering circuitry providing glitch immunity from fast transient glitches on the power supply line. VCC VREF VREF VREF VREF RESET t1 t1 t1 = RESET TIME = 250ms TYPICAL VREF = RESET VOLTAGE THRESHOLD Figure 10. Power Fall RESET Timing |
Similar Part No. - ADM812RARTZ-REEL7 |
|
Similar Description - ADM812RARTZ-REEL7 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |