February 2010
Doc ID 17049 Rev 1
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ST802RT1A
ST802RT1B
10/100 real-time Ethernet 3.3 V transceiver
Features
■
IEEE802.3 10Base-T and IEEE802.3u
100Base-TX, 100Base-FX (ST802RT1B only)
transceiver
■
Support for IEEE802.3x flow control
■
Provides full-duplex operation in both 100
Mbps and 10 Mbps modes
■
Register bit strap during HW reset
■
Auto MDI-X for 10/100 Mb/s
■
Auto-negotiation
■
Provides loop-back mode for diagnostics
■
Programmable LED display for operating mode
and functionality signaling
■
MII / RMII interface
■
MDC / MDIO serial management interface
■
Optimized deterministic latency for real-time
Ethernet operation
■
Supports external transformer with turn ratio
1.414:1 on Tx/Rx side
■
Self-termination transceiver for external
components and power saving
■
Operation from single 3.3 V supply
■
High ESD tolerance
■
48-pin LQFP 7 x 7 package
■
Extended temp. range: -40 °C to +105 °C
■
Power dissipation < 315 mW (typ)
Applications
■
Industrial control
■
Factory automation
■
High-end peripherals
■
Building automation
■
Telecom infrastructure
Description
The ST802RT1x is a high-performance fast
Ethernet physical layer interface for 10Base-T,
100Base-TX and 100Base-FX applications. It is
designed using advanced CMOS technology to
provide MII and RMII interfaces for easy
attachment to 10/100 media access controllers
(MAC). The ST802RT1x supports the 100Base-
TX of IEEE802.3u and 10Base-T of IEEE802.3i
and 100Base FX of IEEE 802.3u (B version only).
The ST802RT1x supports both half-duplex and
full-duplex operation at 10 and 100 Mbps
operation. Its operating mode can be set using
auto-negotiation, parallel detection or manual
control. It allows for the support of auto-
negotiation functions for speed and duplex
detection. The automatic MDI / MDIX feature
compensates for the use of a crossover cable.
With auto MDIX, the ST802RT1x automatically
detects what is on the other end of the network
cable and switches the TX & RX pin functionality
accordingly.
LQFP48
Table 1.
Device summary
Order codes
Temperature range
Package
ST802RT1AFR
- 40 to 105 °C
LQFP48
ST802RT1BFR
- 40 to 105 °C
LQFP48
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