參數(shù)資料
型號: DS1876T+T&R
廠商: Maxim Integrated Products
文件頁數(shù): 4/69頁
文件大?。?/td> 0K
描述: IC CTRLR SFP DUAL LDD 28TQFN
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
類型: SFP 激光控制器
輸入類型: 邏輯
輸出類型: 邏輯
接口: I²C
電流 - 電源: 10mA
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)
12
Maxim Integrated
SFP Controller with Dual LDD Interface
DS1876
Detailed Description
The DS1876 integrates the control and monitoring func-
tionality required in a dual transmitter system. Key com-
ponents of the DS1876 are shown in the Block Diagram
and described in subsequent sections.
DACs During Power-Up
On power-up, the DS1876 sets the DACs to high imped-
ance. After time tINIT, the DACs are set to an initial condition
set in EEPROM. After a temperature conversion is com-
pleted and if the VCC LO alarm is enabled, an additional
VCC conversion above the customer-defined VCC LO
alarm level is required before the DACs are updated with
the value determined by the temperature conversion and
the DAC LUT.
If a fault is detected, and TXD1 and TXD2 are toggled
to re-enable the outputs, the DS1876 powers up fol-
lowing a similar sequence to an initial power-up. The
Typical Operating Circuit
TXF1
DISABLE
FAULT
TX_FAULT
TX_DISABLE1
TX_DISABLE2
MOD1
DAC
APC1
DAC
MOD2
DAC
APC2
DAC
LDD1
EEPROM
QUICK
TRIP
ADC
SDA
SCL
TXDOUT2
TXD2
TXDOUT1
TXFOUT
TXF2
TXD1
MODE_DEF2 (SDA)
MODE_DEF1 (SCL)
I2C
DS1876
BMON1
PMON1
BMON2
PMON2
BMON
APCIN
APCSET
MODSET
RB1
RP2
RB1
RP1
TOSA1
DISABLE
FAULT
LDD2
BMON
APCIN
APCSET
MODSET
RC FILTERS
(FIGURE 6)
TOSA2
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