4096-Bit Addressable 1-Wire EEPROM with PIO

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

* 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