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参数资料
| 型号： | DS1877T+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 16/65页 |
| 文件大小： | 0K |
| 描述： | IC CTLR/MON SFP 1-2CH 28TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | SFP+ 控制器 |
| 输入类型： | 逻辑 |
| 输出类型： | 逻辑 |
| 接口： | I²C |
| 电流 - 电源： | 2.5mA |
| 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) |
| 其它名称： | 90-1877T+TRL |
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23
Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
Reading a Single Byte from a Slave: Unlike the
write operation that uses the memory address byte
to define where the data is to be written, the read
operation occurs at the present value of the memory
address counter. To read a single byte from the slave,
the master generates a START condition, writes the
slave address byte with R/W = 1, reads the data byte
with a NACK to indicate the end of the transfer, and
generates a STOP condition.
Manipulating the Address Counter for Reads: A
dummy write cycle can be used to force the address
pointer to a particular value. To do this, the mas-
ter generates a START condition, writes the slave
address byte (R/W = 0), writes the memory address
where it desires to read, generates a repeated START
condition, writes the slave address byte (R/W = 1),
reads data with ACK or NACK as applicable, and
generates a STOP condition.
Memory Organization
The device features memory tables that are internally
organized into 8-byte rows. The main device located at
A2h is used for overall device configuration and receiver
1 control, calibration, alarms, warnings, and monitoring.
Lower Memory, A2h is addressed from 00h7Fh and
contains alarm and warning thresholds, flags, masks,
several control registers, password entry area (PWE),
and the table-select byte.
Table 01h, A2h primarily contains user EEPROM (with
PW1 level access) as well as alarm and warning enable
bytes.
Table 02h, A2h is a multifunction space that contains
configuration registers, scaling and offset values, pass-
words, and interrupt registers as well as other miscel-
laneous control bytes.
Table 04h, A2h contains a temperature-indexed LUT for
control of the DAC1 voltage. The DAC1 LUT can be pro-
grammed in 2NC increments over the -40NC to +102NC
range. It also contains an LUT for temperature-controlled
offsets for DAC1.
Table 05h, A2h is empty by default. It can be config-
ured to contain the alarm and warning enable bytes
from Table 01h, Registers F8hFFh with the MASK bit
enabled (Table 02h, Register 88h). In this case Table
01h is empty.
The main device located at B2h is used for receiver 2
control, calibration, alarms, warnings, and monitoring.
Lower Memory, B2h is addressed from 00h7Fh and
contains alarm and warning thresholds, flags, masks,
several control registers, PWE, and the table-select byte.
Table 01h, B2h contains alarm and warning enable
bytes.
Table 02h, B2h is a multifunction space that contains
configuration registers, scaling and offset values, pass-
words, interrupt registers as well as other miscellaneous
control bytes. Table 02h, B2h only contains functions
related to receiver 2. All other functions are controlled by
Table 02h, A2h.
Table 04h, B2h contains a temperature-indexed LUT for
control of the DAC2 voltage. The DAC2 LUT can be pro-
grammed in 2NC increments over the -40NC to +102NC
range. It also contains an LUT for temperature-controlled
offsets for DAC2.
Table 05h, B2h is empty by default. It can be config-
ured to contain the alarm and warning-enable bytes
from Table 01h, Registers F8hFFh with the MASK bit
enabled (Table 02h, Register 88h). In this case Table
01h is empty.
Auxiliary Memory (Device A0h) contains 256 bytes
of EE memory accessible from address 00hFFh. It is
selected with the device address of A0h.
See the Register Descriptions section for a more com-
plete detail of each byte’s function, as well as for read/
write permissions for each byte.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1878 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface |
| DS1878T | 功能描述:ADC / DAC多通道 SFP+ Controller w/ MAX3946&3945 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 |
| DS1878T TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP+ Controller with Digital LDD Interface |
| DS1878T+ | 功能描述:ADC / DAC多通道 SFP+ Controller w/ MAX3946&3945 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 |
| DS1878T+T | 功能描述:ADC / DAC多通道 SFP+ Controller w/ MAX3946&3945 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 |
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