MAX690CPA
The MAX690, MAX692, and MAX694 are supplied in
8-pin packages and provide four functions:
? A reset output during power-up, power-down, and
brownout conditions.
? Battery backup switching for CMOS RAM, CMOS
microprocessor or other low power logic.
? A Reset pulse if the optional watchdog timer has not
been toggled within a specified time.
? A 1.3V threshold detector for power fail warning, low
battery detection, or to monitor a power supply other
than 5V
MAX691ACWE
The MAX691A/MAX693A/MAX800L/MAX800M microprocessor (?P) supervisory circuits are pin-compatible
upgrades to the MAX691, MAX693, and MAX695. They
improve performance with 30?A supply current, 200ms
typ reset active delay on power-up, and 6ns chip-enable
propagation delay. Features include write protection
of CMOS RAM or EEPROM, separate watchdog outputs, backup-battery switchover, and a RESET output
that is valid with VCC down to 1V. The MAX691A/
MAX800L have a 4.65V typical reset-threshold voltage,
and the MAX693A/MAX800Ms? reset threshold is 4.4V
typical. The MAX800L/MAX800M guarantee power-fail
accuracies to ?2%
MAX691EWE
The MAX690 family of supervisory circuits reduces the
complexity and number of components required for
power supply monitoring and battery control functions in
microprocessor systems. These include ?P reset and
backup-battery switchover, watchdog timer, CMOS RAM
write protection, and power-failure warning. The MAX690
family significantly improves system reliability and accuracy compared to that obtainable with separate ICs or
discrete components.
MAX693AEWE-T
The MAX691A/MAX693A/MAX800L/MAX800M microprocessor (?P) supervisory circuits are pin-compatible
upgrades to the MAX691, MAX693, and MAX695. They
improve performance with 30?A supply current, 200ms
typ reset active delay on power-up, and 6ns chip-enable
propagation delay. Features include write protection
of CMOS RAM or EEPROM, separate watchdog outputs, backup-battery switchover, and a RESET output
that is valid with VCC down to 1V. The MAX691A/
MAX800L have a 4.65V typical reset-threshold voltage,
and the MAX693A/MAX800Ms? reset threshold is 4.4V
typical. The MAX800L/MAX800M guarantee power-fail
accuracies to ?2%
MAX705CSA
The MAX705?MAX708/MAX813L microprocessor (?P)
supervisory circuits reduce the complexity and number of
components required to monitor power-supply and battery
functions in ?P systems. These devices significantly improve
system reliability and accuracy compared to separate ICs or
discrete components.
The MAX705/MAX706/MAX813L provide four functions:
1) A reset output during power-up, power-down, and
brownout conditions.
2) An independent watchdog output that goes low if
the watchdog input has not been toggled within 1.6
seconds.
3) A 1.25V threshold detector for power-fail warning, lowbattery detection, or for monitoring a power supply
other than 5V.
4) An active-low manual-reset input.
MAX705ESA-T
? Supervisory-Function Integration Significantly
Improves System Reliability While Reducing Board
Space
? ?MAX Package
? Guaranteed RESET Valid at VCC = 1V
- 200ms Reset Pulse Width
- Debounced TTL/CMOS-Compatible ManualReset Input
- Active-High Reset Output (MAX707/MAX708/
MAX813L)
? Precision-Supply Voltage Monitor
- 4.65V (MAX705/MAX707/MAX813L)
- 4.40V (MAX706/MAX708)
? Voltage Monitor for Power-Fail or Low-Battery
Warning
MAX707CSA-T
The MAX705?MAX708/MAX813L microprocessor (?P)
supervisory circuits reduce the complexity and number of
components required to monitor power-supply and battery
functions in ?P systems. These devices significantly improve
system reliability and accuracy compared to separate ICs or
discrete components.
The MAX705/MAX706/MAX813L provide four functions:
1) A reset output during power-up, power-down, and
brownout conditions.
2) An independent watchdog output that goes low if
the watchdog input has not been toggled within 1.6
seconds.
3) A 1.25V threshold detector for power-fail warning, lowbattery detection, or for monitoring a power supply
other than 5V.
4) An active-low manual-reset input
MAX712CSE
The MAX712/MAX713 fast-charge Nickel Metal Hydride
(NiMH) and Nickel Cadmium (NiCd) batteries from a DC
source at least 1.5V higher than the maximum battery
voltage. 1 to 16 series cells can be charged at rates up
to 4C. A voltage-slope detecting analog-to-digital converter, timer, and temperature window comparator determine
charge completion. The MAX712/MAX713 are powered
by the DC source via an on-board 5V shunt regulator.
They draw a maximum of 5?A from the battery when not
charging. A low-side current-sense resistor allows the
battery charge current to be regulated while still
supplying power to the battery?s load.
MAX713CSE
The MAX712/MAX713 fast-charge Nickel Metal Hydride
(NiMH) and Nickel Cadmium (NiCd) batteries from a DC
source at least 1.5V higher than the maximum battery
voltage. 1 to 16 series cells can be charged at rates up
to 4C. A voltage-slope detecting analog-to-digital converter, timer, and temperature window comparator determine
charge completion. The MAX712/MAX713 are powered
by the DC source via an on-board 5V shunt regulator.
They draw a maximum of 5?A from the battery when not
charging. A low-side current-sense resistor allows the
battery charge current to be regulated while still
supplying power to the battery?s load
MAX713CSE+
The MAX712/MAX713 fast-charge Nickel Metal Hydride
(NiMH) and Nickel Cadmium (NiCd) batteries from a DC
source at least 1.5V higher than the maximum battery
voltage. 1 to 16 series cells can be charged at rates up
to 4C. A voltage-slope detecting analog-to-digital converter, timer, and temperature window comparator determine
charge completion. The MAX712/MAX713 are powered
by the DC source via an on-board 5V shunt regulator.
They draw a maximum of 5?A from the battery when not
charging. A low-side current-sense resistor allows the
battery charge current to be regulated while still
supplying power to the battery?s load
MAX7219 8-Digit LED Display Driver IC DIP-24 Package
MAX7221CNG
The MAX7219/MAX7221 are compact, serial input/
output common-cathode display drivers that interface
microprocessors (?Ps) to 7-segment numeric LED
displays of up to 8 digits, bar-graph displays, or 64 individual
LEDs. Included on-chip are a BCD code-B decoder,
multiplex scan circuitry, segment and digit drivers, and
an 8x8 static RAM that stores each digit. Only one
external resistor is required to set the segment current for
all LEDs. The MAX7221 is compatible with SPI?, QSPI?,
and MICROWIRE?, and has slew-rate-limited segment
drivers to reduce EMI.
A convenient 4-wire serial interface connects to all
common ?Ps. Individual digits may be addressed
and updated without rewriting the entire display. The
MAX7219/MAX7221 also allow the user to select code-B
decoding or no-decode for each digit.
