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The LXT304A is a fully integrated low-power transceiver
for both North American 1.544 Mbps (T1), and Interna-
tional 2.048 Mbps (E1) applications. It features a constant
low output impedance transmitter allowing for high trans-
mitter return loss in T1/E1 applications. Transmit pulse
shapes (DSX-1 or E1) are selectable for various line
lengths and cable types.
The LXT304A provides receive jitter attenuation starting
at 3 Hz, and is microprocessor controllable through a serial
interface.
It offers a variety of diagnostic features including transmit
and receive monitoring. The device incorporates an on-
chip crystal oscillator, and also accepts digital clock inputs.
It uses an advanced double-poly, double-metal CMOS pro-
cess and requires only a single 5-volt power supply.
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MODE
Host
INT
SDI
SDO
CS
SCLK
CLKE
Hardware
EC1
EC2
EC3
RLOOP
LLOOP
TAOS
TPOS
TNEG
TCLK
Control
Equalizer
Synchronizer
Internal Clock
Generator
Jitter
Attenuator
Elastic Store
Data Latch
Receive
Monitor
Transmit
Driver
Control
MTIP
MRING
Timing
Recovery
Data Slicers
Line Driver
TTIP
TRING
MCLK
XTALIN
XTALOUT
RCLK
RPOS
RNEG
LOS
DPM
Peak
Detector
RTIP
RRING
L1
LVL1 [ LEVEL ONE ]
