参数资料
型号: DS1876T+T&R
厂商: Maxim Integrated Products
文件页数: 4/69页
文件大小: 0K
描述: IC CTRLR SFP DUAL LDD 28TQFN
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
类型: SFP 激光控制器
输入类型: 逻辑
输出类型: 逻辑
接口: I²C
电流 - 电源: 10mA
安装类型: 表面贴装
封装/外壳: 28-WFQFN 裸露焊盘
供应商设备封装: 28-TQFN-EP(5x5)
包装: 带卷 (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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