参数资料
| 型号： | DS1874T+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 23/88页 |
| 文件大小： | 0K |
| 描述： | IC CTLR SFP+ ANLG LDD 28-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 类型： | 激光二极管控制器 |
| 通道数： | 1 |
| 电源电压： | 2.85 V ~ 3.9 V |
| 电流 - 电源： | 2.5mA |
| 工作温度： | -40°C ~ 95°C |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
| 其它名称： | 90-1874T+000 |
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SFP+ Controller with Digital LDD Interface
after the CSELOUT has been set to 1. Each operation
consists of 16-bit transfers (15-bit address/data, 1-bit
RWN). All data transfers are MSB first.
3-Wire Interface Timing
Figure 15 shows the 3-wire interface timing. Figure 16
shows the 3-wire state machine. See the 3-Wire Digital
BIT
15:9
8
7:0
NAME
Address
RWN
Data
DESCRIPTION
7-bit internal register address
0: write; 1: read
8-bit read or write data
Interface Specification table for more information.
DS1874 and MAX3798/MAX3799
Communication
Normal Operation
Write Mode (RWN = 0): The master generates 16 clock
cycles at SCLOUT in total. It outputs 16 bits (MSB first)
to the SDAOUT line at the falling edge of the clock. The
master closes the transmission by setting the
CSELOUT to 0.
Read Mode (RWN = 1): The master generates 16 clock
cycles at SCLOUT in total. It outputs 8 bits (MSB first)
to the SDAOUT line at the falling edge of the clock. The
SDAOUT line is released after the RWN bit has been
transmitted. The slave outputs 8 bits of data (MSB first)
at the rising edge of the clock. The master samples
SDAOUT at the falling edge of SCLOUT. The master
closes the transmission by setting the CSELOUT to 0.
The majority of the communication between the two
devices consists of bias adjustments for the APC loop.
After each temperature conversion, the laser modula-
tion setting must be updated. Status registers TXSTAT1
and TXSTAT2 are read between temperature updates
at a regular interval: t RR (see the Analog Voltage
Monitoring Characteristics table). The results are stored
in TXSTAT1 and TXSTAT2 (Table 02h, FCh–FDh).
Manual Operation
The MAX3798/MAX3799 are manually controllable
using four registers in the DS1874: 3WCTRL,
ADDRESS, WRITE, and READ. Commands can be
manually issued while the DS1874 is in normal opera-
tion mode. It is also possible to suspend normal 3-wire
commands so that only manual operation commands
are sent (3WCTRL, Table 02h, Register F8h).
WRITE MODE
CSELOUT
t L
t T
SCLOUT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
t DS
SDAOUT
A6
A5
A4
A3
A2
A1
A0
RWN
D7
D6
D5
D4
D3
D2
D1
D0
t DH
READ MODE
CSELOUT
t L
t T
SCLOUT
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
t DS
SDAOUT
A6
A5
A4
A3
A2
A1
A0
RWN
D7
D6
D5
D4
D3
D2
D1
D0
t DH
Figure 15. 3-Wire Timing
______________________________________________________________________________________
23
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相关代理商/技术参数 |
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|---|---|
| DS1874T+ | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dgtl LDD 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 |
| DS1874T+T&R | 制造商:Maxim Integrated Products 功能描述:SFP+ CONTROLLER WITH DIGITAL LDD INTERFACE - Tape and Reel 制造商:Maxim Integrated Products 功能描述:MXMDS1874T+T&R SFP+ CTRLR FOR USE W/MAX3 制造商:Maxim Integrated Products 功能描述:IC CTLR SFP+ ANLG LDD 28-TQFN |
| DS1874T+T&R | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Dgtl LDD 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 |
| DS1874T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface |
| DS1875 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:PON Triplexer and SFP Controller |
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