SLXT332QE.G2 S E001 Intel, SLXT332QE.G2 S E001 Datasheet - Page 17

• Manufacturer Part Number: SLXT332QE.G2 S E001
• Manufacturer: Intel

Specifications of SLXT332QE.G2 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

3.2
3.2.1
Datasheet
Figure 4. 50% AMI Coding
15 consecutive zeros, the LOS flag is reset and another smooth transition replaces MCLK with the
recovered clock at RCLK. During LOS conditions, received data is output on RPOS/RNEG (or
RDATA if unipolar I/O is selected).
Depending on the options selected, recovered clock and data signals may be routed through the
jitter attenuator, through the B8ZS/HDB3 decoder, and may be output to the framer as either
bipolar or unipolar data. In unipolar data I/O mode, the LXT332 reports bipolar violations via an
output for one RCLK period on the respective BPV pin.
Transmitter
The two transmitters in the LXT332 DLIU are identical. The following paragraphs describe the
operation of a single transmitter.
Transmit data from the framer is clocked serially into the device at TPOS/TNEG in the bipolar
mode or at TDATA in the unipolar mode. The transmit clock (TCLK) supplies the input
synchronization. The transmitter samples TPOS/TNEG or TDATA inputs on the falling edge of
TCLK. If TCLK is not supplied, the transmitter remains powered down and the TTIP/TRING
outputs are held in a high-Z state, except during RLOOP, DLOOP, QRSS or TAOS modes. A
separate power supply (TVCC0 or TVCC1) supplies each output driver. Current limiters on the
output drivers provide short circuit protection. Refer to the Test Specifications Section for MCLK
and TCLK timing characteristics. The LXT332 transmits data as a 50% Alternate Mark Inversion
(AMI) line code as shown in
the default and the transmission complies with the selected encoding scheme.
Zero suppression is available only in Unipolar mode. The two zero-suppression types are B8ZS,
used in T1 environments, and HDB3, used in E1 environments. The scheme selected depends on
whether the application is T1 or E1.
Bipolar Violation Insertions
In the Host mode with unipolar data I/O selected, a Bipolar Violation (BPV) insert function is
available. When the VCQE pin is held High, VCQ0 and VCQ1 pins control bipolar violation
insertion for ports 0 and 1, respectively. TDATA and VCQ are both sampled on the falling edge of
TCLK. If VCQ is High, the next available mark is transmitted as a BPV, except as follows:
1. B8ZS and HDB3 zero suppression is not violated.
2. If Local Loopback (LLOOP) and Transmit All Ones (TAOS) are both active, the BPV is
looped back to RDATA but the line driver transmits All Ones (no violations).
Dual T1/E1 Line Interface Unit with Crystal-less Jitter Attenuation — LXT332
TRING
TTIP
Figure
Bit Cell
4. Enabling the zero suppression encoders/decoders overrides
1
0
1
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