ST802RT1B Datasheet, PDF (1/58 Pages) STMicroelectronics – 10/100 real-time Ethernet 3.3 V transceiver

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
Table 1. Device summary
LQFP48
■ 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.
Order codes
Temperature range
Package
ST802RT1AFR
ST802RT1BFR
- 40 to 105 °C
- 40 to 105 °C
LQFP48
LQFP48
February 2010
Doc ID 17049 Rev 1
1/58
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