3X38FTR Datasheet, PDF (18/64 Pages) Agere Systems – OCTAL-FET (Fast Ethernet Transceiver) for 10Base-T/100Base-TX/FX

3X38FTR 208-Pin SQFP
OCTAL-FET for 10Base-T/100Base-TX/FX
Preliminary Data Sheet
September 2000
Pin Descriptions (continued)
Table 5. 10/100 Mbits/s Twisted-Pair (TP) Interface Pins
Pin
155, 152,
149, 146,
142, 139,
136, 132
154, 151,
148, 145,
141, 138,
135, 131
119, 117,
115, 113,
111, 109,
107, 105
120, 118,
116, 114,
112, 110,
108, 106
177, 178,
179, 180,
181, 182,
183, 184
Signal
TPIN+/
FOIN+[7:0]
TPIN–/
FOIN–[7:0]
TPOUT+/
FOOUT+[7:0]
TPOUT–/
FOOUT–[7:0]
FOSD[7:0]
Type
Description
I Receive Data. Positive differential received 125 Mbaud MLT3, or
10 Mbaud Manchester data from magnetics.
Fiber-Optic Data Input. Positive differential received 125 Mbaud
pseudo-ECL data from fiber transceiver.
I Receive Data. Negative differential received 125 Mbaud MLT3 or
10 Mbaud Manchester data from magnetics.
Fiber-Optic Data Input. Negative differential received 125 Mbaud
pseudo-ECL data from fiber transceiver.
O Transmit Data. Positive differential transmit 125 Mbaud MLT3 or
10 Mbaud Manchester data to magnetics.
Fiber-Optic Data Output. Positive differential transmit 125 Mbaud
pseudo-ECL compatible data to fiber transceiver.
O Transmit Data. Negative differential transmit 125 Mbaud MLT3 or
10 Mbaud Manchester data to magnetics.
Fiber-Optic Data Output. Negative differential transmit 125 Mbaud
pseudo-ECL compatible data to fiber transceiver.
I Fiber-Optic Signal Detect. Pseudo-ECL input signal which indicates
whether or not the fiber-optic receive pairs (FOIN±) are receiving
valid signal levels. These inputs are ignored when not in fiber mode
and should be grounded.
Table 6. LED and Configuration Pins
Pin
Signal
Type
Description
2
ACTLED_5/
O Activity LED[5]. This pin indicates transmit or receive activity on
BIACTLED_5/
port 5. 10 mA active-high output.
CARIN_EN
O Bicolor Activity LED[5]. When the 3X38 is placed in the bicolor LED
mode by pulling both of the LED_MODE[1:0] pins high at powerup or
reset, this output will go high whenever there is either transmit or
receive activity. This output works in conjunction with the link LED out-
puts to drive a single bicolor LED package, when in bicolor LED mode.
10 mA active-high output.
I Carrier Integrity Enable. At powerup or reset, if this pin is pulled high
through a 10 kΩ resistor, it will enable the carrier integrity function of
register 29, bit 3, if station management is unavailable.
This pin has an internal 50 kΩ pull-down resistor for normal operation
(CARIN_EN is disabled). This input and register bits [29.3] are ORed
together.
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Lucent Technologies Inc.