MAX6453, MAX6454, MAX6455, MAX6456 µP Supervisors with Separate VCC Reset and Manual Reset Outputs

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The MAX6453-MAX6456 are low-power, dual-voltage µP supervisors featuring separate V_CC reset and manual reset outputs. The dual outputs support both soft-system reset (interrupt) and hard-system reset (reboot) functions. The reset output asserts when any of the monitored voltages falls below its specified threshold and remains asserted for the reset timeout (140ms min) after all voltages exceed their respective reset thresholds. All devices are offered with nine factory-fixed reset thresholds for monitoring primary system voltages (V_CC) from 1.8V to 5V and an adjustable reset input for monitoring a secondary system voltage down to 0.63V.

Each device has a manual reset input, a V_CC reset output, and a manual reset output. The MAX6453/MAX6454 manual reset output asserts when the manual reset input is low. It remains asserted for the manual reset timeout period (140ms min) after the manual reset input transitions high. The MAX6453/MAX6354 manual reset input controls only the manual reset output and does not affect the V_CC reset output.

The manual reset input of the MAX6455/MAX6456 controls both the manual reset and V_CC reset outputs. When the manual reset input is low for less than 3.3s (typ), only the manual reset output asserts and remains asserted for the manual reset timeout period (140ms min) after the manual reset input transitions high. If the manual reset input is low for at least 3.3s (typ), the reset output also asserts and remains asserted for the reset timeout period (140ms min) after the manual reset input transitions high. This enhanced feature allows the implementation of a soft/hard-system reset combination.

The MAX6453/MAX6455 have active-low push-pull reset and manual reset outputs, and the MAX6454/MAX6456 have active-low open-drain reset and manual reset outputs. All devices are available in small SOT23-6 packages and are fully specified over the extended temperature range (-40°C to +85°C).

Key Features

Applications/Uses

Precision Factory-Set Reset Thresholds From 1.6V to 4.6V
Adjustable Threshold to Monitor Voltages Down to 0.63V
Manual Reset Input with Extended 3.36s Setup Period
Immune to Short Voltage Transients
Low 6µA Supply Current
Guaranteed Valid Reset Down to V_CC = 1.0V
Active-Low RESET (Push-Pull or Open-Drain) Outputs
140ms (min) Reset Timeout Period
Small SOT Package

	Automotive
	Consumer Electronics
	DVD Players
	Industrial Equipment
	Medical Devices
	Modems
	MP3 Players
	Set-Top Boxes

Key Specifications: Pushbutton Devices

Part Number

Number of Monitored Voltages

Manual Reset Feature

MR1 Setup Time

Reset Threshold Range (V)

Active-Low Reset Output

Min. Reset Timeout Range

Reset Thresh. Acc. (% @+25°C)

Max. I_CC (µA)

Package

RoHS Available

Operating Temp. Range (°C)

Price^**

MAX6453

Independent Soft and Hard Reset Outputs

1µs

1.2 to 1.79
1.8 to 2.49
2.5 to 3.29
3.3 to 4.99

Push-Pull

85ms to 300ms

2.5

SOT-23/6

Yes

-40 to +85
0 to +70

$1.38 @ 1k

MAX6454

1µs

Open Drain

$1.38 @ 1k

MAX6455

1µs (Soft)
3.36s (Hard)

Push-Pull

$1.38 @ 1k

MAX6456

1µs (Soft)
3.36s (Hard)

Open Drain

$1.38 @ 1k

See All Pushbutton Devices (17)

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.