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參數(shù)資料
| 型號(hào)： | MAX689EVKIT |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1Msps.µ.P Compatible.8-Bit ADC with 1µ.A Power Down[MAX153/MAX153C/D/MAX153CAP/MAX153CAP-T/MAX153CPP/MAX153CWP/MAX153CWP-T/MAX153EAP/MAX153EAP-T/MAX153EPP/MAX153EWP/MAX153EWP-T/MAX153MJP] |
| 文件頁(yè)數(shù)： | 4/7頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | MAX689EVKIT |
M
3-Pin, Low-Power
μP Reset Circuits
4
_______________________________________________________________________________________
V
CC
V
CC
GND
MAX6802
RESET
V
CC
GND
RESET
MOTOROLA
68HCXX
μ
P
100k
Applications Information
Interfacing to μPs with Bidirectional
Reset Pins
Since the
RESET
output on the MAX6802 is open-drain,
this device interfaces easily with μPs that have bidirec-
tional reset pins, such as the Motorola 68HC11.
Connecting the μP supervisor
’
s
RESET
output directly
to the microcontroller
’
s (μC
’
s)
RESET
pin with a single
pullup resistor allows either device to assert reset
(Figure 1).
Negative-Going V
CC
Transients
In addition to issuing a reset to the μP during power-up,
power-down, and brownout conditions, these devices are
relatively immune to short-duration, negative-going V
CC
transients (glitches). The
Typical Operating Characteristics
show the Maximum Transient Duration vs. Reset
Comparator Overdrive graph. The graph shows the maxi-
mum pulse width that a negative-going V
CC
transient may
typically have without issuing a reset signal. As the ampli-
tude of the transient increases, the maximum allowable
pulse width decreases.
Figure 1. Interfacing to μPs with Bidirectional Reset Pins
TOP VIEW
1
2
3
V
CC
RESET (RESET)
MAX6800
MAX6801
MAX6802
SOT23-3
( ) ARE FOR MAX6800
GND
Pin Configuration
Figure 2. Ensuring Reset Valid Down to V
CC
= 0
V
CC
GND
MAX6801
RESET
100k
(a)
V
CC
GND
MAX6800
RESET
100k
*
(b)
*ASSUMES HIGH-Z RESET INPUT TO THE
μ
P
MAX6801
V
CC
V
CC
RESET
RESET
GND
V
CC
GND
μ
P
Typical Operating Circuit
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