MAX6467XS18D3-T Maxim Integrated, MAX6467XS18D3-T Datasheet - Page 6

• Manufacturer Part Number: MAX6467XS18D3-T
• Description: Supervisory Circuits
• Manufacturer: Maxim Integrated
• Series: MAX6467, MAX6468r

Specifications of MAX6467XS18D3-T

• Number Of Voltages Monitored: 1
• Monitored Voltage: 1.8 V to 5 V
• Undervoltage Threshold: 1.755 V
• Overvoltage Threshold: 1.845 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: No Watchdog
• Battery Backup Switching: No Backup
• Power-up Reset Delay (typ): 225 ms
• Supply Voltage - Max: 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SC-70
• Chip Enable Signals: No
• Maximum Power Dissipation: 245 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Supply Current (typ): 7 uA
• Supply Voltage - Min: 1 V

In addition to issuing a reset to the µP during power-up,
power-down, and brownout conditions, the MAX6467/
MAX6468 are relatively immune to short-duration falling
V
Characteristics section shows the Maximum Transient
Duration vs. V
MAX6468 do not generate a reset pulse. This graph was
generated using a falling pulse applied to V
above the actual reset threshold and ending below the
threshold by the magnitude indicated (V
The graph indicates the typical maximum pulse width a
falling V
pulse. As the magnitude of the transient increases (goes
Microprocessor Supervisory Reset Circuits
with Edge-Triggered, One-Shot Manual Reset
*Additional reset timeout options may be available. Contact factory for availability.
Figure 2. Functional Diagram
6
CC
RESET TIMEOUT SUFFIX
V
MR
_______________________________________________________________________________________
CC
transients (glitches). The Typical Operating
CC
V
CC
transient can have without initiating a reset
1.5kΩ
D3
D7
CC
Applications Information
Overdrive for which the MAX6467/
1.23V
V
GND
CC
Falling V
MR ONE-SHOT/
DEBOUNCE
V
TIMEOUT
PERIOD
RESET
CC
RESET TIMEOUT PERIOD
MAX6467
MAX6468
(min/max) (ms)
CC
1200/2400
OUTPUT
150/300
RESET
CC
Transients
Overdrive).
CC
starting
RESET
farther below the reset threshold), the maximum allowable
pulse width decreases. A 0.1µF bypass capacitor from
V
The MAX6467/MAX6468 guarantee proper operation
down to V
reset levels down to V
active-low outputs (MAX6468 only, Figure 3) ensures
that RESET remains valid while the RESET output can
no longer sink current. This scheme does not work with
the open-drain outputs of the MAX6467. Ensure that the
resistor value used does not overload the RESET output
when V
cations, use 100kΩ to 1MΩ.
MR TIMEOUT PERIOD
Figure 3. RESET Valid to V
TRANSISTOR COUNT: 748
PROCESS: BiCMOS
CC
(min/max) (ms)
to GND provides additional transient immunity.
150/300
150/300
Ensuring a Valid RESET Output Down
CC
CC
is above the reset threshold. For most appli-
= +1V. In applications that require valid
Reset Timeout Delay*
MAX6468
CC
CC
GND
V
MR RISING DEBOUNCE PERIOD
CC
= 0V
= 0V, a pulldown resistor to
Chip Information
(min/max) (ms)
RESET
150/300
150/300
to V
CC
R1
100kΩ
= 0V