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DS4520
9-Bit I²C Nonvolatile I/O Expander Plus Memory
9-Channel, Nonvolatile Port Expander Integrates User-EEPROM
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Status
Active: In Production.
Description
The DS4520 is a 9-bit nonvolatile (NV) I/O expander with 64 bytes of NV
user memory controlled by an I²C-compatible serial interface.
The DS4520 offers users a digitally programmable alternative to hardware jumpers and mechanical switches that are being used to control digital logic nodes. Furthermore,the digital state of each pin can be read through the serial interface. Each I/O pin is independently configurable. The outputs are open drain with selectable pullups. Each output has the ability to sink up to 12mA. Since the device is NV, it powers up in the desired state allowing it to control digital logic inputs immediately on power-up without having to wait for the host CPU to initiate control.
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Data Sheet
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Key Features
- Programmable Replacement for Mechanical Jumpers and Switches
- Nine NV Input/Output Pins
- 64-Byte NV User Memory (EEPROM)
- I²C-Compatible Serial Interface
- Up to 8 Devices Can be Multidropped on the Same I²C Bus
- Open-Drain Outputs with Configurable Pullups
- Outputs Capable of Sinking 12mA
- Low Power Consumption
- Wide Operating Voltage (2.7V to 5.5V)
- Operating Temperature Range: -40°C to +85°C
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Applications/Uses
- Network Storage
- PC Peripherals
- RAM-Based FPGA Bank Switching for Multiple Profiles
- Routers/Switches
- Selecting Between Boot Flash
- Servers
- Setting ASIC Configurations/Profiles
- Telecom Equipment
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Key Specifications:
| I/O Port Expanders |
| Part Number |
Interface |
I/O |
Drive Current
(mA) |
VSUPPLY
(V) |
VSUPPLY
(V) |
Budgetary Price |
| min |
max |
See Notes |
| DS4520 |
Serial - I2C Compatible |
9 |
12 |
2.7 |
5.5 |
$1.25 @1k |
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See All I/O Port Expanders (35)
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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
Reliability Reports
Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Recommended Replacement |
Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| DS4520E
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Active |
DS4520E+
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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-40°C to +85°C
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RoHS/Lead-Free: No
Materials Analysis |
| DS4520E+
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Active |
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS4520E+TRL
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Active |
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16+1*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| DS4520E-TRL
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Active |
DS4520E+TRL
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TSSOP;16 pin;33.4 mm²
Outline Drawing:21-0066 (PDF)
Land Pattern: 90-0117 (PDF)
Use pkgcode/variation: U16-1*
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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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More Information
Didn't Find What You Need?
Information Index
Rev 0;
2004-06-25
This page last modified: 2010-05-19
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