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DS28E04-100
4096-Bit Addressable 1-Wire EEPROM with PIO
1-Wire®-Addressable, 4Kb EEPROM with Programmable I/O for Use in Rack-Based, Multicard Applications
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Status
Description
The DS28E04-100 is a 4096-bit, 1-Wire® EEPROM chip with seven address inputs. The address inputs are directly mapped into the 1-Wire 64-bit Device ID Number to easily enable the host system to identify the physical location or functional association of the DS28E04-100 in a multidevice 1-Wire network environment. The 4096-bit EEPROM array is configured as 16 pages of 32 bytes with a 32-byte scratchpad to perform write operations. EEPROM memory pages can be individually write protected or put in EPROM-emulation mode, where bits can only be changed from a 1 to a 0 state. In addition to the memory, the DS28E04-100 has two general-purpose I/O ports that can be used for input or to generate level and/or pulse outputs. Activity registers also capture port activity for state change monitoring. The DS28E04-100 communicates over the single-contact 1-Wire bus. The communication follows the standard Maxim 1-Wire protocol.
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Data Sheet
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An evaluation kit is available: DS9090K
Key Features
- 4096 bits of EEPROM Memory Partitioned into 16 Pages of 256 Bits
- Seven Address Inputs for Physical Location Configuration
- Two General-Purpose PIO Pins with Pulse-Generation Capability
- Individual Memory Pages can be Permanently Write-Protected or put in OTP EPROM Emulation Mode ("Write to 0")
- Communicates to Host with a Single Digital Signal at 15.3kbps or 111kbps Using 1-Wire Protocol
- Parasitic or VCC Powered
- Conditional Search Based on PIO Status or PIO Activity
- Switchpoint Hysteresis and Filtering to Optimize Performance in the Presence of Noise
- Reads and Writes Over a Wide 2.8V to 5.25V Voltage Range from -40°C to +85°C
- 16-Pin, 150-mil SO Package
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Applications/Uses
- Access Products, Optical Network Units, and PBXs
- Accessory/PCB Identification
- Autoconfiguration of Modular Systems such as Central-Office Switches, Cellular Base Stations, Access Products, Optical Network Units, and PBXs
- Autoconfiguration of Modular Systems such as Central-Office Switches, Cellular Base Stations, Access Products, Optical Network Units, and PBXs
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Key Specifications:
| Memory (EPROM, EEPROM, ROM, NV SRAM) |
| Part Number |
Memory Type |
Memory Size |
Bus Type |
Real Time Clock |
DIP w/Int. Batt. |
Pwr. Cap Pckg. |
Battery Monitor |
GPIO |
VSUPPLY
(V) |
VSUPPLY
(V) |
Budgetary Price |
| min |
max |
See Notes |
| DS28E04-100 |
EEPROM |
4K x 1 |
1-Wire |
No |
No |
No |
No |
Yes |
2.8 |
5.25 |
$2.14 @1k |
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See All Memory (EPROM, EEPROM, ROM, NV SRAM) (58)
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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
More Information
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Information Index
Document Ref.: 19-6134
Rev 1;
2011-12-22
This page last modified: 2011-12-22
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