參數(shù)資料
型號(hào)： LXT301Z
廠商： Digital Data Communications GmbH
英文描述： ADVANCED T1/E1 SHORT-HAUL TRANSCEIVERS
中文描述： 先進(jìn)的T1/E1短途收發(fā)器
文件頁(yè)數(shù)： 7/20頁(yè)
文件大?。?/td> 508K
代理商： LXT301Z
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The transceiver incorporates an advanced Driver Perfor-
mance Monitor (DPM) in parallel with the TTIP and
TRING at the output transformer. The DPM circuitry uses
four comparators and a 150 ns pulse discriminator to filter
glitches.The DPM output level goes high upon detection of
63 consecutive zeros, and is cleared when a one is detected
on the transmit line, or when a reset command is received.
The DPM output also goes High to indicate a ground on
TTIP or TRING. A ground fault induced DPM flag is auto-
matically cleared when the ground condition is corrected
(chip reset is not required).
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The LXT300Z and LXT301Z transceivers can be con-
trolled through hard-wired pins (Hardware Mode).
Both
transceivers can also be commanded to operate in one of
several diagnostic modes.
LXT300Z Only: The LXT300Z can be controlled by a
microprocessor through a serial interface (Host Mode).
The mode of operation is set by the MODE pin logic level.
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In Hardware Mode the transceiver is accessed and con-
trolled through individual pins. With the exception of the
INT and CLKE functions, Hardware Mode provides all the
functions provided in the Host Mode. In the Hardware
Mode RPOS and RNEG outputs are valid on the rising
edge of RCLK. The LXT301Z operates in Hardware
Mode at all times.
LXT300Z Only: To operate in Hardware Mode, MODE
must be set Low. Equalizer Control signals (EC1 through
EC3) are input on the Interrupt, Serial Data In and Serial
Data Out pins. Diagnostic control for Remote Loopback
(RLOOP), Local Loopback (LLOOP), and Transmit All
Ones (TAOS) modes is provided through the individual pins
used to control serial interface timing in the Host Mode.
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