AMIS-49200 and AMIS-49250 Fieldbus MAU (media access units) are transceiver chips for low speed FOUNDATION Fieldbus® and Profibus® PA devices.
AMIS-49200 was designed to be a near pin-for-pin replacement of the Yokogawa µSAA22Q MAU. 'Near pin-for-pin' means that associated component values may change, but no board changes are required.
AMIS-49250 is a small, micro-lead frame version, in a 7.0 x 7.0 mm NQFP-44 package.

• All node power can be supplied by the bus, via the AMIS-492x0
• Current consumption 500 uA (typ)
• VCC voltage: 6.2 V to 4.75 V
• VDD voltage: 5.5 V to 2.7 V
• Compatible with IEC 1158-2 and ISA 50.02
• Shunt regulator
• Voltage reference (internal only)
• Series regulator
• Bandpass filter
• Slew rate control
• Segment current control
• Low voltage detection
• Carrier detect
• Data rate: 31.25 kbps voltage mode
• Dual voltage supply:3.0 to 6.2 V