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MAX9940
Signal-Line Overvoltage Protector for Low-Voltage Devices
Protects Low-Voltage Devices Using Sensitive Communication Protocols
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Status
Active: In Production.
Description
The MAX9940 signal-line overvoltage protector for low-voltage
digital communication ports provides protection
against high-voltage faults and ESD strikes. The
MAX9940 is especially useful for sensitive communication
protocols such as Maxim 1-Wire® that cannot
afford standard means of fault protection, such as large
series resistors or large line capacitances.
The MAX9940 operates from a single supply voltage of
+2.2V to +5.5V and consumes only 13µA of quiescent
supply current. The EXT port is protected up to 28V.
The device features a reaction time of 60ns for fast
action during fault conditions and operates over the
-40°C to +125°C automotive temperature range.
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Data Sheet
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An evaluation kit is available: MAX9940EVKIT
Key Features
- 28V Protection on EXT
- Extended ESD Protection
- ±4kV IEC 61000-4 Contact on EXT
- +2.2V to +5.5V Supply Voltage Range
- 13µA Quiescent Supply Current
- 60ns Fault Reaction Time
- Small, 5-Pin SC70
- -40°C to +125°C Temperature Range
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Applications/Uses
- Industrial Equipment
- Notebook Computers
- Portable Devices
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Key Specifications:
| Signal-Line Protectors |
| Part Number |
Functions |
Signal Path Leakage
(±nA) |
Analog Signal Range
(V) |
Features |
VSUPPLY
(V) |
VSUPPLY (Dual)
(±V) |
RON
(Ω) |
Fault Protect.
(±V) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max |
Dual |
max |
max w/pins |
See Notes |
| MAX9940 |
1-Line |
5000 |
0 to +5.5 |
Automatic Protection |
2.2 to 5.5 |
1.1 to 2.25 |
77.5 |
28 |
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5.3 |
$0.53 @1k |
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See All Signal-Line 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
Block Diagram/Typical Application 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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| MAX9940AXK+
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Active |
SC70;5 pin;5.3 mm²
Outline Drawing:21-0076 (PDF)
Land Pattern: 90-0188 (PDF)
Use pkgcode/variation: X5+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9940AXK+T
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Active |
SC70;5 pin;5.3 mm²
Outline Drawing:21-0076 (PDF)
Land Pattern: 90-0188 (PDF)
Use pkgcode/variation: X5+1*
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-40°C to +125°C
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RoHS/Lead-Free: Lead Free
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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Information Index
Document Ref.: 19-4168
Rev 0;
2009-02-06
This page last modified: 2009-02-06
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