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MAX6332, MAX6333, MAX6334
3-Pin, Ultra-Low-Voltage, Low-Power µP Reset Circuits
Industry's-First Stand-Alone Reset ICs for 1.8V supplies in SOT package
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Status
Active: In Production.
Description
The MAX6332/MAX6333/MAX6334 microprocessor (µP) supervisory circuits monitor the power supplies in 1.8V to 3.3V µP and digital systems. They increase circuit reliability and reduce cost by eliminating external components and adjustments.
These devices perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, keeping it asserted for a preset timeout period after VCC has risen above the reset threshold. The only difference among the three devices is their output. The MAX6333 (push/pull) and MAX6334 (open-drain) have an active-low RESET output, while the MAX6332 (push/pull) has an active-high RESET output. The MAX6332/MAX6333 are guaranteed to be in the correct state for VCC down to 0.7V. The MAX6334 is guaranteed to be in the correct state for VCC down to 1.0V.
The reset comparator in these ICs is designed to ignore fast transients on VCC. Reset thresholds are factory-trimmable between 1.6V and 2.5V, in approximately 100mV increments. There are 15 standard versions available (2,500 piece minimum-order quantity); contact the factory for availability of nonstandard versions (10,000 piece minimum-order quantity). For space-critical applications, the MAX6332/MAX6333/MAX6334 come packaged in a 3-pin SOT23.
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Data Sheet
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Key Features
- Ultra-Low 0.7V Operating Supply Voltage
- Low 3.3µA Supply Current
- Precision Monitoring of 1.8V and 2.5V Power-Supply Voltages
- Reset Thresholds Available from 1.6V to 2.5V, in Approximately 100mV Increments
- Fully Specified over Temperature
- Three Power-On Reset Pulse Widths Available (1ms min, 20ms min, 100ms min)
- Low Cost
- Three Available Output Structures: Push/Pull Active-Low RESET, Push/Pull RESET, Open-Drain Active-Low RESET
- Guaranteed RESET/Active-Low RESET Valid to VCC = 0.7V (MAX6332/MAX6333)
- Power-Supply Transient Immunity
- No External Components
- 3-Pin SOT23 Package
- Pin-Compatible with MAX809/MAX810 and MAX6326/MAX6327/MAX6328
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Applications/Uses
- Automotive Electronics
- Computers: Desktop, Workstation, Server
- Controllers
- Critical µP and µC Power Monitoring
- Intelligent Instruments
- Pentium® II Computers
- Portable Battery-Powered Equipment
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Key Specifications:
| Supervisors (1 Monitored Voltage) |
| Part Number |
Reset Thresh.
(V) |
Reset Out |
tRESET |
Watchdog Feature |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Budgetary Price |
| min |
@ +25°C |
max |
See Notes |
| MAX6332 |
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| 1ms to 15ms | | 15ms to 85ms | | 85ms to 300ms |
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No Watchdog |
1.8 |
7 |
$1.02 @1k |
| MAX6333 |
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$1.00 @1k |
| MAX6334 |
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$1.02 @1k |
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See All Supervisors (1 Monitored Voltage) (274)
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Pricing 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.
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Diagram
 Typical Operating Circuit
Notes and Comments
Trip thresholds from 1.6V to 2.5V and 1ms, 20ms, or 100ms reset timeout options, push-pull active-low RESET (MAX6333)
Push-pull RESET (MAX6332)
Open-drain active-low RESET (MAX6334)
More Information
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Information Index
Document Ref.: 19-1411
Rev 2;
2006-03-14
This page last modified: 2010-07-26
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