MAX6745XKVD3+T Maxim Integrated, MAX6745XKVD3+T Datasheet - Page 23

• Manufacturer Part Number: MAX6745XKVD3+T
• Description: Supervisory Circuits MCU Supervisor
• Manufacturer: Maxim Integrated
• Series: MAX6736, MAX6737, MAX6738, MAX6739, MAX6740, MAX6741, MAX6742, MAX6743, MAX6744, MAX6745r

Specifications of MAX6745XKVD3+T

• Rohs: yes
• Number Of Voltages Monitored: 2
• Monitored Voltage: 1.8 V to 5 V, 0.9 V to 3.3 V
• Undervoltage Threshold: 1.53 V, 0.765 V
• Overvoltage Threshold: 1.62 V, 0.81 V
• Output Type: Active Low, Push-Pull
• Manual Reset: Not 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: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SC-70
• Chip Enable Signals: No
• Maximum Power Dissipation: 247 mW
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: Yes
• Supply Current (typ): 5 uA, 10 uA
• Supply Voltage - Min: 1 V

Table 4. Power-Fail Detection States During Normal Operation
Maxim Integrated
STATE
G
A
B
C
D
E
H
F
I
16-Bit Microcontroller with Infrared Module
POWER-FAIL
(Periodically)
(Periodically)
On
On
On
On
On
On
On
On
Off
REGULATOR
INTERNAL
Off
On
On
On
On
Off
On
Off
Off
OSCILLATOR
CRYSTAL
Off
On
On
On
On
Off
On
Off
Off
RETENTION
SRAM
Yes
Yes
—
—
—
—
—
—
—
V
V
Crystal warmup time, t
CPU held in reset.
V
CPU normal operation.
Power drop too short.
Power-fail not detected.
V
PFI is set when V
maintains this state for at least t
which time a power-fail interrupt is gener-
ated (if enabled).
CPU continues normal operation.
V
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
V
Crystal warmup time, t
CPU resumes normal operation from 8000h.
V
Power-fail detected.
CPU goes into reset.
Power-fail monitor turns on periodically.
V
Device held in reset. No operation allowed.
DD
POR
DD
RST
POR
DD
POR
DD
< V
> V
> V
< V
< V
< V
< V
< V
POR
RST
RST
POR
DD
DD
DD
DD
.
.
.
.
< V
< V
< V
< V
COMMENTS
PFW
RST
RST
RST
RST
MAXQ613
.
.
.
.
< V
XTAL_RDY
XTAL_RDY
DD
< V
PFW
.
PFW
.
, at
and
23