參數(shù)資料
型號: DS1878T+T&R
廠商: Maxim Integrated Products
文件頁數(shù): 19/101頁
文件大小: 0K
描述: IC CTLR SFP W/DGTL LDD RX 28TQFN
標準包裝: 2,500
類型: SFP+ 控制器
輸入類型: 模擬,數(shù)字
輸出類型: 數(shù)字
接口: I²C,LDD,串行
電流 - 電源: 2.5mA
安裝類型: 表面貼裝
封裝/外殼: 28-WFQFN 裸露焊盤
供應商設備封裝: 28-TQFN-EP(5x5)
包裝: 帶卷 (TR)
DS1878
SFP+ Controller with Digital LDD Interface
24
______________________________________________________________________________________
DETECTION OF TXF FAULT
TXD OR TXF RESET
tINITR1/2
TXFOUT
(ONLY ALARM FAULTS PRESENT)
TXFOUT
(QT ALARMS PRESENT)
Figure 17b. TXFOUT Latched Operation and TXD_TXFEN = 1
DETECTION OF TXF FAULT
TXFOUT
Figure 17a. TXFOUT Nonlatched Operation
By default, TXD does not impact TXFOUT (TXD_TXFEN =
0). This is shown in the Figure 17c. When TXD_TXFEN
= 1, TXD affects TXFOUT. The particular behavior is
described in Figure 17a and 17b.
VCCTXF is a new control bit is required to enable/dis-
able VCC LO alarm/warning before the first VCC con-
version is complete. If VCCTXF = 1, VCC LO
alarm/warning does not generate TXFOUT before the
first VCC conversion (which takes approximately 13ms
to complete). When VCCTXF = 0, VCC LO alarm/warn-
ing generates TXFOUT before the first VCC conversion,
which is illustrated in Figure 17c and Figure 17d.
Two conditions are shown. In the first instance, VCC
powers on quickly and goes above the VCC LO thresh-
old before the first conversion is complete (approxi-
mately 13ms).
In the other instance, VCC would power up and go
above the VCC LO threshold after the first conversion is
complete. In this case TXFOUT behaves as in
Figure 17d.
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