AMIS-492X0 Datasheet, PDF (1/22 Pages) ON Semiconductor – Fieldbus MAU

1.0 Introduction
AMIS-492x0
Fieldbus MAU
1.1 Overview
AMIS-492x0 Fieldbus MAU (media access unit) is a transceiver chip for low speed FOUNDATION Fieldbus® and Profibus® PA
devices. The AMIS-49200 was originally 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. A micro-leadframe package option
(NQFP) is also available, the AMIS-49250.
1.2 Definitions, Acronyms and Abbreviations
IC
ESD
FF
LQFP
Manchester
MAU
MDS
NQFP
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
- “Near chip-scale” quad flat pack
- 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.
©2008 SCILLC. All rights reserved.
June 2008 – Rev. 6
Publication Order Number:
492x0/D