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ADM1232AARM データシート(PDF) 4 Page - Analog Devices

部品番号 ADM1232AARM
部品情報  Microprocessor Supervisory Circuit
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メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
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ADM1232AARM データシート(HTML) 4 Page - Analog Devices

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ADM1232A
–4–
REV. 0
PIN FUNCTION DESCRIPTIONS
Mnemonic
Function
PB RESET
Push Button Reset Input. This debounced input will ignore pulses of less than 1 ms and is guaranteed to re-
spond to pulses greater than 20 ms.
TD
Time Delay Set allows the user to select the maximum amount of time the ADM1232A will allow the
STROBE
input to remain inactive (i.e.,
STROBE is not receiving any high-to-low transitions), without forcing the
ADM1232A to generate a RESET pulse. (See
STROBE specifications, Figure 4 and the note on STROBE
timeout selection.)
TOLERANCE
Tolerance Input. This input will determine how much the supply voltage will be allowed to decrease (as a per-
centage tolerance) before a RESET is asserted. Connect to VCC for 10% and GND for 5%.
GND
0 V ground reference for all signals.
RESET
Active high logic output. Will be asserted when:
1. VCC decreases below the amount specified by the TOLERANCE input or,
2.
PB RESET is forced low or,
3. If there are no high-to-low transitions within the limits set by TD at
STROBE or,
4. During power-up.
RESET
Inverse of RESET, with an open drain output.
STROBE
The
STROBE input is used to monitor the activity of a microprocessor. If there are no high-to-low transi-
tions within the time specified by TD, a reset will be asserted.
VCC
Power supply input +5 V.
PIN CONFIGURATIONS
R-16
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
ADM1232A
NC = NO CONNECT
NC
NC
TD
NC
TOLERANCE
GND
PB RESET
NC
STROBE
NC
NC
NC
NC
RESET
RESET
VCC
N-8 and R-8
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM1232A
PB RESET
RESET
STROBE
VCC
TD
TOLERANCE
GND
RESET
RM-8
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM1232A
PB RESET
RESET
STROBE
VCC
TD
TOLERANCE
GND
RESET


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