AMIS-49200 Datasheet, PDF (3/22 Pages) AMI SEMICONDUCTOR – Fieldbus MAU Chip

AMIS-49200 Fieldbus MAU
Data Sheet
1.0 Introduction
1.1 Overview
AMIS-49200 Fieldbus MAU (media access unit) is a transceiver chip for low speed FOUNDATION Fieldbus® and Profibus® PA devices.
It 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.
1.2 Definitions, Acronyms and Abbreviations
IC
ESD
ICFF
LQFP
Manchester
MAU
MDS
µSAA22Q
- Integrated circuit
- Electrostatic discharge
- FOUNDATION Fieldbus
- Low profile quad flat pack
- Communications encoding scheme implemented in FOUNDATION Fieldbus
- Medium attachment unit
- Medium dependent sub-layer
- Name of Yokogawa’s MAU IC
1.3 References
• Fieldbus Medium Attachment Unit (MAU) Chip, µSAA22Q, Yokogawa Electric Corporation, June 12, 1998, Document No.: SS-96-01
(Rev.3).
• Fieldbus Standard for Use in Industrial Control Systems Part 2: Physical Layer Specification and Service Definition, Amendment to
Clause 22 ISA/SP50 –1996-544B, dS50.02, Part 2, Draft Standard.
• Profibus PA specifications EN 50170 (formerly DIN 19245) covers all of Profibus and includes PA (31.25 kbps Intrinsically Safe
Physical Layer), references IEC 61158-2.
2.0 AMIS-49200 Fieldbus MAU Description
2.1 Features
AMIS-49200 Fieldbus MAU is a transceiver IC for low speed FOUNDATION Fieldbus and Profibus PA devices. It incorporates the
following features:
• Current consumption 500uA (typ)
• VCC voltage: 6.2V to 4.75V
• VDD voltage: 5.5V to 2.7V
• Compatible to IEC 1158-2 and ISA 50.02
• Shunt regulator
• Voltage reference (internal only)
• Series regulator
• Band-pass filter
• Slew rate control
• Segment current control
• Low voltage detection
• Carrier detect
• Data rate: 31.25kbps voltage mode
• Dual voltage supply 3-6.2V
• 44-pin LQFP package
AMI Semiconductor – Jan. 07, M-20532-003
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