DS28E04-100

PRODUCTION

4096-Bit Addressable 1-Wire EEPROM with PIO

1-Wire®-Addressable, 4Kb EEPROM with Programmable I/O for Use in Rack-Based, Multicard Applications

Data Sheet (Rev. 1) Product Selection Table
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Overview

  • 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

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.

Applications

  • 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
DS28E04-100
4096-Bit Addressable 1-Wire EEPROM with PIO
DS28E04-100: Typical Operating Circuit
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Documentation

Data Sheet 1

Application Note 2

Design Note 1

Technical Articles 8

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