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MAX6335, MAX6336, MAX6337
4-Pin, Ultra Low-Voltage, Low-Power µP Reset Circuits with Manual Reset
Industry's-First Stand-Alone Reset ICs for 1.8V supplies with Manual Reset in SOT Package
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Status
Active: In Production.
Description
The MAX6335/MAX6336/MAX6337 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. They also feature a debounced manual-reset input.
These devices perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold or whenever manual reset is asserted. Reset remains asserted for a preset timeout period after VCC has risen above the reset threshold or after manual reset is deasserted. The only difference among the three devices is their output. The MAX6336 (push/pull) and MAX6337 (open-drain) have an active-low RESET output, while the MAX6335 (push/pull) has an active-high RESET output. The MAX6335/MAX6336 are guaranteed to be in the correct state for VCC down to 0.7V. The MAX6337 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 (2500 piece minimum-order quantity); contact the factory for availability of nonstandard versions (10,000 piece minimum-order quantity). For space-critical applications, the MAX6335/MAX6336/MAX6337 come packaged in a 4-pin SOT143.
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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
- Debounced Manual Reset
- 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 (MAX6335/MAX6336)
- Power-Supply Transient Immunity
- No External Components
- 4-Pin SOT143 Package
- Pin-Compatible with MAX811/MAX812 and MAX6314/MAX6315
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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 |
Supervisor Features |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Budgetary Price |
| min |
@ +25°C |
max |
See Notes |
| MAX6335 |
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| 1ms to 15ms | | 15ms to 85ms | | 85ms to 300ms |
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No Watchdog |
Manual Reset |
1.8 |
7 |
$1.10 @1k |
| MAX6336 |
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$1.10 @1k |
| MAX6337 |
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$1.10 @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, and manual reset, push-pull RESET (MAX6336)
Push-pull RESET (MAX6335)
Open-drain RESET (MAX6337)
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Information Index
Document Ref.: 19-1412
Rev 2;
2006-05-09
This page last modified: 2007-06-04
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