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参数资料
| 型号： | DS1876T+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/69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) |
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13
Maxim Integrated
SFP Controller with Dual LDD Interface
DS1876
only difference is that the DS1876 already has deter-
mined the present temperature, so the tINIT time is not
required for the DS1876 to recall the APC and MOD
set points from EEPROM. See Figure 1.
DACs as a Function of Transmit Disable
(TXD1, TXD2)
If TXD1 or TXD2 are asserted (logic 1) during normal
operation, the associated outputs are disabled within
tOFF. When TXD1 or TXD2 are deasserted (logic 0), the
DS1876 sets the DACs with the value associated with
the present temperature. When asserted, soft TXD1 or
soft TXD2 (TXDC) (Lower Memory, Register 6Eh) would
allow a software control identical to the TXD1 or TXD2 pin
(Figure 2). The POLARITY register (Table 02h, Register
C6h) determines if the off-state value of the DACs is
VREFIN or 0V.
Quick-Trip Timing
As shown in Figure 3, the DS1876’s input compara-
tor is shared among the six quick-trip alarms (TXP1
HI, TXP1 LO, TXP2 HI, TXP2 LO, BIAS1 HI, and BIAS2
HI). The comparator polls the alarms in a multiplexed
sequence. The updates are used to compare the HTXP1,
LTXP1, HTXP2, and LTXP2 (monitor diode voltages) and
the HBATH1 and HBATH2 (BMON1, BMON2) signals
against the internal APC and BIAS reference, respec-
tively. Depending on the results of the comparison, the
Table 1. Acronyms
Figure 1. Power-Up Timing
Figure 2. TXD1, TXD2 Timing
VCC
VPOA
DAC
SETTINGS
HIGH IMPEDANCE
OFF STATE
LUT VALUE
500s
tINIT
tOFF
tON
TXD_
DAC
SETTINGS
LUT VALUE
OFF STATE
ACRONYM
DESCRIPTION
ADC
Analog-to-Digital Converter
AGC
Automatic Gain Control
APC
Automatic Power Control
APD
Avalanche Photodiode
ATB
Alarm Trap Bytes
DAC
Digital-to-Analog Converter
LOS
Loss of Signal
LUT
Lookup Table
NV
Nonvolatile
QT
Quick Trip
TE
Tracking Error
TIA
Transimpedance Amplifier
ROSA
Receiver Optical Subassembly
SEE
Shadowed EEPROM
SFF
Small Form Factor
SFF-8472
Document Defining Register Map of SFPs
and SFFs
SFP
Small Form Factor Pluggable
SFP+
Enhanced SFP
TOSA
Transmit Optical Subassembly
TXP
Transmit Power
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1877 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP Controller for Dual Rx Interface |
| DS1877T+ | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dual RX Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1877T+T&R | 制造商:Maxim Integrated Products 功能描述:SFP CTRLR FOR DUAL RX INTERFACE TQF - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC CTLR/MON SFP 1-2CH 28TQFN |
| DS1877T+T&R | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dual RX Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1877T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP Controller for Dual Rx Interface |
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