Microchip Technology 25AA02UIDT-I/OT

25AA02UIDT-I/OT Description

The 25AA02UIDT-I/OT is a 2kB serial Electrically Erasable Programmable Read-Only Memory (EEPROM) with a preprogrammed, 32-bit unique ID serial number. The memory is accessed via a simple serial peripheral interface (SPI) compatible serial bus. The bus signals required are a clock input (SCK) plus separate data in (SI) and data out (SO) lines. Access to the device is controlled through a chip select (CS) input. Communication to the device can be paused via the hold pin (HOLD). While the device is paused, transitions on its inputs will be ignored, with the exception of chip select, allowing the host to service higher priority interrupts.

25AA02UIDT-I/OT Features

■ IEEE 802.3 10BASE-T/100BASE-TX compliant physical layer interface
■ IEEE 802.3u Auto-Negotiation support
■ Digital Adaptive Equalization control
■ Link status interrupt capability
■ XOR tree mode support
■ 3-port LED support (speed, link and activity)
■ 10BASE-T auto-polarity correction
■ LAN Connect Interface
■ Diagnostic loopback mode
■ 1:1 transmit transformer ratio support
■ Low power (less than 300 mW in active transmit mode)
■ Reduced power in “unplugged mode” (less than 50 mW)
■ Automatic detection of “unplugged mode”
■ 3.3 V device
■ 48-pin Shrink Small Outline Package

25AA02UIDT-I/OT Applications

Industrial
Computers & Computer Peripherals
Communications & Networking
Consumer Electronics