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參數(shù)資料
| 型號： | MAX6326XR42+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO3 |
| 封裝： | LEAD FREE, SC-70, 3 PIN |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 155K |
| 代理商： | MAX6326XR42+T |
MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348
3-Pin, Ultra-Low-Power SC70/SOT
P Reset Circuits
4
_______________________________________________________________________________________
____________ Applications Information
Interfacing to Ps with
Bidirectional Reset Pins
Since the RESET output on the MAX6328/MAX6348 is
open drain, these devices interface easily with micro-
processors (Ps) that have bidirectional reset pins,
such as the Motorola 68HC11. Connecting the P
supervisor’s RESET output directly to the microcon-
troller’s (C’s) RESET pin with a single pull-up resistor
allows either device to assert reset (Figure 1).
Negative-Going VCC Transients
In addition to issuing a reset to the P during power-up,
power-down, and brownout conditions, these devices
are relatively immune to short-duration, negative-going
VCC transients (glitches).
The Typical Operating Characteristics show the Maxi-
mum Transient Duration vs. Reset Threshold Overdrive
graph, for which reset pulses are not generated. The
graph shows the maximum pulse width that a negative-
going VCC transient may typically have when issuing a
reset signal. As the amplitude of the transient increas-
es, the maximum allowable pulse width decreases.
Figure 1. Interfacing to Ps with Bidirectional Reset Pins
Table 1. Factory-Trimmed Reset Thresholds
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
RESET
GND
RESET
INPUT
MAX6328
MAX6348
MOTOROLA
68HCXX
P
GND
VCC
3.800
3.895
3.857
3.705
3.700
3.743
38
3.792
3.755
3.607
3.644
37
3.600
3.690
3.654
3.510
3.500
3.546
36
3.587
3.552
3.412
3.447
35
3.400
3.485
3.451
3.315
3.300
3.349
34
3.383
3.350
3.217
3.250
33
3.080
3.150
3.126
3.003
3.000
3.034
31
3.075
3.045
2.925
2.955
30
2.930
3.000
2.974
2.857
2.800
2.886
29
2.870
2.842
2.730
2.758
28
2.700
2.768
2.741
2.633
2.630
2.660
27
2.696
2.669
2.564
2.591
26
2.500
2.562
2.537
2.437
2.400
2.462
25
2.460
2.436
2.340
2.364
24
2.320
2.375
2.355
2.262
2.285
23
MIN
TYP
MAX
MIN
TA = -40°C to +85°C
TA = +25°C
2.250
RESET THRESHOLD VOLTAGE, VTH (V)
2.145
2.233
2.200
2.167
SUFFIX
MAX634_ _R
MAX632_ _R
PART
22
MAX632_ _R
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