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MAX6467, MAX6468
Microprocessor Supervisory Reset Circuits with Edge-Triggered, One-Shot Manual Reset
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Status
Active: In Production.
Description
The MAX6467/MAX6468 microprocessor (µP) supervisory circuits monitor single power-supply voltages from +1.8V to +5.0V and assert a reset if the supply voltage drops below its preset threshold. An edge-triggered, one-shot manual reset function ensures that the µP enters the reset mode for a fixed timeout period only, even in the event of a continuously asserted manual reset. The MAX6467/MAX6468 significantly improve system reliability compared to traditional manual reset supervisory circuits.
A variety of factory-trimmed threshold options accommodate different supply voltages and tolerances, eliminating external components. The factory-set thresholds range from +1.575V to +4.625V to monitor +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V supplies with various tolerances. Reset timeout periods of 150ms (min) and 1200ms (min) are available to accommodate different µP platforms.
A single, active-low RESET output asserts when VCC drops below its threshold or if the edge-triggered active-low MR asserts low. Active-low RESET remains low for the reset timeout period after VCC rises above its threshold and for a fixed, one-shot timeout period after a manual reset input falling edge. Active-low RESET remains valid as long as VCC remains above +1V. Open-drain (MAX6467) and push-pull (MAX6468) output options provide additional flexibility in the system design.
The MAX6467/MAX6468 are offered in the space-saving 4-pin SOT143 package and the ultra-small 4-pin SC70 package and are specified over the automotive (-40°C to +125°C) temperature range.
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Data Sheet
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Key Features
- Precision Factory-Set Reset Threshold Voltages for +5.0V, +3.3V, +3.0V, +2.5V, and +1.8V Supplies
- Edge-Triggered Manual Reset Input with One-Shot Pulsed Reset Output
- Two Reset Timeout Period Options (150ms or 1200ms min)
- Immune to Short Voltage Transients
- Low Supply Current (3µA at VCC = +1.8V)
- Active-Low RESET Valid to VCC = +1V
- Active-Low Open-Drain and Push-Pull Active-Low RESET Output Options
- -40°C to +125°C Operating Temperature Range
- Small 4-Pin SC70 and SOT143 Packages
- No External Components Required
- Pin Compatible with MAX811, MAX6315, MAX6384, and MAX6386
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Applications/Uses
- Automotive Electronics
- Cell Phones/PDAs
- Digital Still Cameras
- DSL Modems
- Embedded Control Systems
- Global Positioning Systems (GPS)
- Industrial Equipment
- Medical Devices
- MP3 Players
- Portable Battery-Powered Equipment
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Key Specifications:
| Pushbutton Devices |
| Part Number |
Monitored Voltages |
Manual Reset Feature |
MR1 Setup Time |
Reset Thresh.
(V) |
Reset Out |
tRESET |
Reset Thresh. Accur.
(%) |
ICC
(µA) |
Package/Pins |
Budgetary Price |
| min |
@ +25°C |
max |
See Notes |
| MAX6467 |
1 |
One-Shot |
1µs |
| 1.2 to 1.79 | | 1.8 to 2.49 | | 2.5 to 3.29 | | 3.3 to 4.99 |
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1.5 |
13 |
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$1.00 @1k |
| MAX6468 |
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$1.00 @1k |
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See All Pushbutton Devices (17)
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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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| Switch Debouncer/Protectors |
| Part Number |
Switch Inputs |
Edge Triggered |
Functions |
Debounce Duration
(ms) |
Output Polarity |
Output Type |
Switch Inputs
(±V) |
ESD Protect.
(±kV) |
ICC
(µA) |
Package/Pins |
Budgetary Price |
| max |
max |
See Notes |
| MAX6467 |
1 |
Falling Edge |
Non-Retriggerable One-Shot |
85 to 300 |
Active Low |
Open-Drain |
+5.5 |
2 |
13 |
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$1.00 @1k |
| MAX6468 |
Push-Pull |
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$1.00 @1k |
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See All Switch Debouncer/Protectors (6)
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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
Application Notes
Product Guides
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX6468XS43D7-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS44D3+T
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Active |
SC70;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX6468XS44D3-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS44D7+T
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Active |
SC70;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX6468XS44D7-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS45D3+T
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Active |
SC70;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX6468XS45D3-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS45D7+T
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Active |
SC70;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX6468XS45D7-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS46D3+T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX6468XS46D3-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| MAX6468XS46D7+T
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Active |
SC70;
Land Pattern: Not Available
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-40°C to +85°C
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See data sheet
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| MAX6468XS46D7-T
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Active |
SC70;4 pin;5.4 mm²
Outline Drawing:21-0098 (PDF)
Land Pattern: 90-0187 (PDF)
Use pkgcode/variation: X4-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Document Ref.: 19-2523
Rev 1;
2006-05-26
This page last modified: 2009-10-14
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