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: 42/170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
30
4. All QDSX digital outputs and bidirectionals have 2 mA drive capability. The
data bus outputs, D[7:0], and CLKO8X have 4 mA drive capability. For board
layouts, care should be maken with the 2mA drive RCLKO[4:1] signals to
guarantee clock signal integrity.
5. The recommended power supply sequencing is as follows:
5.1VDDI[3:1] power must be supplied either before VDDO[6:1] or
simultaneously with VDDO[6:1]. Connection of VDDI[3:1] and VDDO[6:1] to a
common VDD power plane is recommended.
5.2The VDDI[3:1] and VDDO[6:1] power must be applied before input pins
are driven or the input current per pin must be limited to less than 20 mA.
5.3Analog power supplies must be applied after both VDDI[3:1] and
VDDO[6:1] have been applied or the they must be current limited to the
maximum latchup current specification. (100 mA). In operation the differential
voltage measured between TAVD[4:1] and RAVD[4:1] supplies and VDDI[3:1]
and VDDO[6:1] must be less than 0.5 volt. The relative power sequencing of
TAVD[4:1] and RAVD[4:1] power supplies is not important.
5.4Power down the device in the reverse sequence.
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