SLXT334QE.B3 S E001 Intel, SLXT334QE.B3 S E001 Datasheet - Page 13

• Manufacturer Part Number: SLXT334QE.B3 S E001
• Manufacturer: Intel

Specifications of SLXT334QE.B3 S E001

• Operating Supply Voltage (typ): 5V
• Screening Level: Industrial
• Mounting: Surface Mount
• Operating Supply Voltage (min): 4.75V
• Operating Supply Voltage (max): 5.25V
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Lead Free Status / RoHS Status: Not Compliant

2.2.1
2.2.2
2.2.3
2.2.4
Datasheet
The line driver provides a constant low output impedance of <3
it is driving marks or spaces. This well-controlled impedance provides excellent return loss when
used with external precision resistors (±1% accuracy) in series with the transformer.
The Application Information section lists recommended transformer specifications and ratios, and
series resistor (Rt) values.
Line Protection
In the receive side, the 1 K series resistors protect the receiver against current surges coupled into
the device. Due to the high receiver impedance (40 k typ.) the resistors do not affect the receiver
sensitivity.
In the transmit side, the Schottky diodes D1-D4 protect the output driver.
While not mandatory for normal operation, these protection elements are strongly recommended to
improve the design robustness.
Transmit All Ones Mode
Pulling TCLK High for more than 16 MCLK cycles activates Transmit All Ones Mode (TAOS)
Mode. In TAOS Mode, the LXT334 ignores the TPOS and TNEG inputs and transmits marks
continuously at the MCLK frequency.
Pulse Shape
The LXT334 generates transmit pulse shapes internally using a high-speed PLL and digital-to-
analog converters and applies them to the AMI line driver for transmission onto the line at TTIP
and TRING.
Driver Failure Monitor
In the event of a short circuit on any transmit line, the Driver Failure Monitor (DFM, common to
all transceivers) goes High. The LOS pin (LOSx) for that specific port changes its indication status
to flag a driver short condition.
DFM is in parallel with TTIP and TRING. The LXT334 uses a capacitor, charged by a measure of
the driver output current and discharged by a measure of the maximum allowable current, to detect
driver failure.
Shorted lines draw excessive current, overcharging the capacitor. When the capacitor charge is
outside the nominal charge window, the LXT334 reports a driver short circuit failure. During a
long string of spaces, this short-induced overcharge eventually bleeds off, clearing the DFM flag.
Quad Short-Haul Transceiver with Clock Recovery — LXT334
(typical), regardless of whether
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