NLXT300ZPE.F4 Intel, NLXT300ZPE.F4 Datasheet - Page 9

• Manufacturer Part Number: NLXT300ZPE.F4
• Manufacturer: Intel

Specifications of NLXT300ZPE.F4

• Number Of Transceivers: 1
• 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

2.0
2.1
2.1.1
Datasheet
Functional Description
The LXT300Z and LXT301Z are fully integrated PCM transceivers for both 1.544 Mbps (DSX-1)
and 2.048 Mbps (E1) applications. Both transceivers allow full-duplex transmission of digital data
over existing twisted-pair or coax installations. The first page of this data sheet shows a simplified
block diagram of the LXT300Z and
LXT300Z, but does not incorporate the Jitter Attenuator and associated Elastic Store, nor the serial
interface port.
The LXT300Z and LXT301Z transceivers each interface with two twisted-pair or coax lines (one
pair or coax for transmit, one pair or coax for receive) through standard pulse transformers and
appropriate resistors.
Power Requirements
The LXT300Z and LXT301Z are low-power CMOS devices. Each operates from a single +5 V
power supply which can be connected externally to both the transmitter and receiver. However, the
two inputs must be within
separately. Refer to
Isolation between the transmit and receive circuits is provided internally.
Reset Operation (LXT300Z and LXT301Z)
Upon power up, the transceiver is held static until the power supply reaches approximately 3 V.
Upon crossing this threshold, the device begins a 32 ms reset cycle to calibrate the transmit and
receive delay lines and lock the Phase Lock Loop (PLL) to the receive line. A reference clock is
required to calibrate the delay lines. The transmitter reference is provided by TCLK. MCLK
provides the receiver reference for the LXT301Z. The crystal oscillator provides the receiver
reference in the LXT300Z. If the LXT300Z crystal oscillator is grounded, MCLK is used as the
receiver reference clock.
The transceiver can also be reset from the Host mode or Hardware mode. In Host mode, reset is
commanded by simultaneously writing RLOOP and LLOOP to the register. In Hardware mode,
reset is commanded by holding RLOOP and LLOOP High simultaneously for 200 ns. Reset is
initiated on the falling edge of the reset request. In either mode, the reset clears and sets all registers
to 0 and then calibration begins.
“Application Information” on page 16
Advanced T1/E1 Short-Haul Transceivers — LXT300Z/LXT301Z
0.3V of each other, and decoupled to their respective grounds
Figure 3
shows the LXT301Z. The LXT301Z is similar to the
for typical decoupling circuitry.
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