DS28E04-100

` 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 EPROMEmulation Mode ("Write to 0")
` Communicates to Host with a Single Digital Signal at 15.3kbps or 111kbps Using 1-Wire Protocol
` Parasitic or V_CC 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

·  Autoconfiguration of Modular Systems such as Central-Office Switches, Cellular Base Stations, Access Products, Optical Network Units, and PBXs
·  Accessory/PCB Identification

All Pins: Voltage to GND ......................................-0.5V, +6V
All Pins: Sink Current ..................................................20mA
Operating Temperature Range ...................-40°C to +85°C
Junction Temperature .............................................+150°C
Storage Temperature Range ......................-40°C to +85°C
Soldering Temperature ..............See IPC/JEDEC J-STD-020A

Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.

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 EPROMemulation 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 Dallas Semiconductor 1-Wire protocol.