MAX6314US46D1-T Maxim Integrated, MAX6314US46D1-T Datasheet - Page 6
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MAX6314US46D1-T
Manufacturer Part Number
MAX6314US46D1-T
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
MAX6314r
Datasheet
1.MAX6314US41D2-T.pdf
(8 pages)
Specifications of MAX6314US46D1-T
Number Of Voltages Monitored
1
Monitored Voltage
1 V to 5.5 V
Undervoltage Threshold
4.55 V
Overvoltage Threshold
4.71 V
Output Type
Active Low, Bidirectional
Manual Reset
Resettable
Watchdog
No Watchdog
Battery Backup Switching
No Backup
Power-up Reset Delay (typ)
2 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
SOT-143
Chip Enable Signals
No
Maximum Power Dissipation
320 mW
Minimum Operating Temperature
- 40 C
Power Fail Detection
No
Supply Current (typ)
5 uA
Supply Voltage - Min
1 V
MR has an internal 63kΩ pullup resistor, so it can be
left open if not used. Connect a normally open momen-
tary switch from MR to GND to create a manual reset
function; external debounce circuitry is not required. If
MR is driven from long cables or if the device is used in
a noisy environment, connecting a 0.1µF capacitor from
MR to ground provides additional noise immunity.
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
transients (glitches). The Typical Operating Character-
istics show the Maximum Transient Duration vs. Reset
Threshold Overdrive, for which reset pulses are not
generated. The graph was produced using negative-
going pulses, starting at V
the programmed reset threshold by the magnitude
indicated (reset threshold overdrive). The graph shows
the maximum pulse width that a negative-going V
transient may typically have without causing a reset
pulse to be issued. As the amplitude of the transient
increases (i.e., goes farther below the reset threshold),
the maximum allowable pulse width decreases. A 0.1µF
bypass capacitor mounted close to V
tional transient immunity.
68HC11/Bidirectional-Compatible
µP Reset Circuit
Figure 2. MAX6314 Supports Additional Devices on the Reset Bus
6
__________Applications Information
_______________________________________________________________________________________
MR
Negative-Going V
MAX6314
CIRCUITRY
RESET
V
CC
RST
max and ending below
4.7kΩ
CC
CC
provides addi-
C
Transients
IN
RESET
CC
C
STRAY
When V
current—it becomes an open circuit. Therefore, high-
impedance CMOS-logic inputs connected to RESET
can drift to undetermined voltages. This presents no
problem in most applications, since most µP and other
circuitry is inoperative with V
applications where RESET must be valid down to
V
cause any stray leakage currents to flow to ground,
holding RESET low (Figure 3). R1’s value is not critical;
100kΩ is large enough not to load RESET and small
enough to pull RESET to ground.
Figure 3. RESET Valid to V
RESET
RESET
CC
= 0V, adding a pull-down resistor to RESET will
CC
C
falls below 1V, RESET no longer sinks
IN
C
IN
Ensuring a Valid
68HC11
V
MAX6314
CC
OTHER DEVICES
GND
V
CC
CC
CIRCUITRY
RESET
= Ground Circuit
RESET
CC
Down to V
below 1V. However, in
R1
RESET Output
CC
= 0V