参数资料
型号: PM4314
厂商: PMC-SIERRA INC
元件分类: 数字传输电路
英文描述: QUAD T1/E1 LINE INTERFACE DEVICE
中文描述: DATACOM, PCM TRANSCEIVER, PQFP128
封装: 14 X 20 MM, PLASTIC, QFP-128
文件页数: 130/170页
文件大小: 823K
代理商: PM4314
PM4314 QDSX
DATA SHEET
PMC-950857
ISSUE 5
QUAD T1/E1 LINE INTERFACE DEVICE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
118
Figure 18
- CODE Register Sequence During Pulse Generation
Positive
Pulse
Internal 8x
clock (SCLK)
TXTIP
TXTIP-
TXRING
Negative
Pulse
TXRING
Contents of XPLS
internal CODE Reg #
0
TCLKO
1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4
The actual waveform produced at the transformer secondary depends upon the
turns ratio of the transformer used, the series resistance on the primary side
used to match the line, the output impedance of the amplifier, the on-resistance
of the amplifier while providing the transformer ground, and the transformer
winding resistance. To ensure that the amplifiers can drive the reflected load, it is
recommended that a transformer have a turns ratio of no more than 1:2. It is also
recommended that the codes presented here be used as a guideline and that the
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