MAX6326, MAX6327, MAX6328, MAX6346, MAX6347, MAX6348 3-Pin, Ultra-Low-Power SC70/SOT µP Reset Circuits

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The MAX6326/MAX6327/MAX6328/MAX6346/MAX6347/MAX6348 microprocessor (µP) supervisory circuits monitor the power supplies in µP and digital systems. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 2.5V, 3V, 3.3V, and 5V powered circuits.

These circuits perform a single function: they assert a reset signal whenever the V_CC supply voltage declines below a preset threshold, keeping it asserted for at least 100ms after V_CC has risen above the reset threshold. The only difference between the devices is their output. The MAX6326/MAX6346 (push-pull) and MAX6328/MAX6348 (open-drain) have an active-low reset output. The MAX6327/MAX6347 have an active-high push-pull reset output. All of these parts are guaranteed to be in the correct state for V_CC down to 1V. The reset comparator is designed to ignore fast transients on V_CC. Reset thresholds are factory-trimmable between 2.2V and 4.63V, in approximately 100mV increments. Twenty-one standard versions are available. Contact the factory for availability of nonstandard versions.

Ultra-low supply currents (1µA max for the MAX6326/MAX6327/MAX6328) make these parts ideal for use in portable equipment. All six devices are available in space-saving SOT23 and SC70 packages.

Key Features

Applications/Uses

Ultra-Low 1µA (max) Supply Current (MAX6326/MAX6327/MAX6328)
Precision Monitoring of 2.5V, 3V, 3.3V, and 5V Power-Supply Voltages
Reset Thresholds Available from 2.2V to 4.63V
Fully Specified Over Temperature
100ms (min) Power-On Reset Pulse Width
Low Cost
Available in Three Versions: Push-Pull Active-Low RESET, Push-Pull RESET, and Open-Drain Active-Low RESET
Power-Supply Transient Immunity
No External Components
3-Pin SC70/SOT23 Packages
Pin Compatible with MAX803/MAX809/MAX810

	Automotive Electronics
	Computers: Desktop, Workstation, Server
	Controllers
	Critical µP and µC Power Monitoring
	Intelligent Instruments
	Portable Battery-Powered Equipment

Key Specifications: Supervisors (1 Monitored Voltage)

Part Number

Reset Threshold Range (V)

Active-Low Reset Output

Active-High Reset Output

Min. Reset Timeout Range

Watchdog Feature

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

Operating Temp. Range (°C)

Price^**

MAX6326

1.8 to 2.5
2.5 to 3.3

Push-Pull

85ms to 300ms

No Watchdog

1.5

Yes

SC-70/3
SOT-23/3

-40 to +85
0 to +70

$0.98 @ 1k

MAX6327

1.8 to 2.5
2.5 to 3.3

Push-Pull

$0.98 @ 1k

MAX6328

1.8 to 2.5
2.5 to 3.3

Open Drain

$0.98 @ 1k

MAX6346

3.3 to 5.5

Push-Pull

1.75

$0.98 @ 1k

MAX6347

3.3 to 5.5

Push-Pull

1.75

$0.98 @ 1k

MAX6348

3.3 to 5.5

Open Drain

1.75

$0.98 @ 1k

See All Supervisors (1 Monitored Voltage) (268)

Notes:
^**This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.