MAX6326 Maxim, MAX6326 Datasheet - Page 4

• Manufacturer Part Number: MAX6326
• Description: 3-Pin / Ultra-Low-Power SC70/SOT P Reset Circuits
• Manufacturer: Maxim

3-Pin, Ultra-Low-Power SC70/SOT
µP Reset Circuits
Since the RESET output on the MAX6328/MAX6348 is
open drain, these devices interface easily with micro-
processors (µPs) that have bidirectional reset pins,
such as the Motorola 68HC11. Connecting the µP
supervisor’s RESET output directly to the microcon-
troller’s (µC’s) RESET pin with a single pull-up resistor
allows either device to assert reset (Figure 1).
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
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 V
reset signal. As the amplitude of the transient increas-
es, the maximum allowable pulse width decreases.
Table 1. Factory-Trimmed Reset Thresholds
‡
4
____________ Applications Information
Factory-trimmed reset thresholds are available in approximately 100mV increments with a 1.5% room-temperature variance.
CC
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX632_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
MAX634_ _R
_______________________________________________________________________________________
PART
transients (glitches).
CC
transient may typically have when issuing a
Negative-Going V
SUFFIX
22
23
24
25
26
27
28
29
30
31
33
34
35
36
37
38
Bidirectional Reset Pins
Interfacing to µPs with
2.167
2.285
2.364
2.462
2.591
2.660
2.758
2.886
2.955
3.034
3.250
3.349
3.447
3.546
3.644
3.743
MIN
CC
Transients
T
A
2.200
2.320
2.400
2.500
2.630
2.700
2.800
2.930
3.000
3.080
3.300
3.400
3.500
3.600
3.700
3.800
= +25°C
TYP
RESET THRESHOLD VOLTAGE, V
‡
Figure 1. Interfacing to µPs with Bidirectional Reset Pins
V
CC
2.233
2.355
2.436
2.537
2.669
2.741
2.842
2.974
3.045
3.126
3.350
3.451
3.552
3.654
3.755
3.857
MAX
MAX6328
MAX6348
GND
V
CC
RESET
TH
(V)
2.145
2.262
2.340
2.437
2.564
2.633
2.730
2.857
2.925
3.003
3.217
3.315
3.412
3.510
3.607
3.705
MIN
T
A
= -40°C to +85°C
RESET
INPUT
MOTOROLA
68HCXX
GND
V
µP
2.250
2.375
2.460
2.562
2.696
2.768
2.870
3.000
3.075
3.150
3.383
3.485
3.587
3.690
3.792
3.895
MAX
CC