- 您现在的位置：买卖IC网 > PDF目录11783 > DS1875T+ (Maxim Integrated Products)IC SFP CTRLR/TRIPLEXER 38-TQFN PDF资料下载
参数资料
| 型号： | DS1875T+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 25/92页 |
| 文件大小： | 0K |
| 描述： | IC SFP CTRLR/TRIPLEXER 38-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 90 |
| 应用： | 光纤 |
| 接口： | I²C |
| 电源电压： | 2.85 V ~ 3.9 V |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-TQFN（5x7） |
| 包装： | 管件 |
| 安装类型： | 表面贴装 |
| 产品目录页面： | 1431 (CN2011-ZH PDF) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页当前第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页
DS1875
were not modified during the transaction are still
subject to a write cycle. This can result in a whole
page being worn out over time by writing a single
byte repeatedly. Writing a page one byte at a time
wears the EEPROM out eight times faster than writ-
ing the entire page at once. The DS1875’s EEPROM
write cycles are specified in the
Nonvolatile Memory
Characteristics table. The specification shown is at
the worst-case temperature. It can handle approxi-
mately 10 times that many writes at room tempera-
ture. Writing to SRAM-shadowed EEPROM memory
with SEEB = 1 does not count as a EEPROM write
cycle when evaluating the EEPROM’s estimated life-
time.
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 master
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 Map
Memory Organization
The DS1875 features 10 separate memory tables that
are internally organized into 8-byte rows.
The Lower Memory is addressed from 00h to 7Fh and
contains alarm and warning thresholds, flags, masks,
several control registers, password entry area (PWE),
and the table select byte.
Table 00h contains conversion results for MON5
through MON8.
Table 01h primarily contains user EEPROM (with PW1
level access) as well as some alarm and warning status
bytes.
Table 02h is a multifunction space that contains config-
uration registers, scaling and offset values, passwords,
interrupt registers, as well as other miscellaneous con-
trol bytes.
Table 03h is strictly user EEPROM that is protected by
a PW2-level password.
Table 04h contains a temperature-indexed LUT for
control of the modulation voltage. The modulation LUT
can be programmed in 2°C increments over the -40°C
to +102°C range. Access to this register is protected
by a PW2-level password.
Table 05h contains a temperature-indexed LUT that
allows the APC set point to change as a function of
temperature to compensate for Tracking Error (TE). The
APC LUT has 36 entries that determine the APC setting
in 4°C windows between -40°C to 100°C. Access to this
register is protected by a PW2-level password.
Table 06h contains a MON4-indexed LUT for control of
the M4DAC voltage. The MON4 LUT has 32 entries that
are configurable to act as one 32-entry LUT of two 16-
byte LUTs. When configured as one 32-byte LUT, each
entry corresponds to an increment of 1/32 the full scale.
When configured as two 16-byte LUTs, the first 16
bytes and the last 16 bytes each correspond to 1/16 full
scale. Either of the two sections is selected with a sep-
arate configuration bit. Access to this register is pro-
tected by a PW2-level password.
Table 07h contains a temperature-indexed LUT for
control of the PWM reference voltage (integration of FB
input). The PWM LUT has 36 entries that determine the
APC setting in 4°C windows between -40°C to +100°C.
Access to this register is protected by a PW2-level
password.
Table 08h contains a temperature-indexed LUT for
control of the BIAS current. The BIAS LUT can be pro-
grammed in 2°C increments over the 40°C to +102°C
range. Access to this register is protected by a PW2-
level password.
Auxiliary Memory (Device A0h) contains 256 bytes of
EE memory accessible from address 00h–FFh. 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.
PON Triplexer and SFP Controller
______________________________________________________________________________________
31
相关PDF资料 |
PDF描述 |
|---|---|
| D38999/20MD18PA | CONN RCPT 18POS WALL MNT W/PINS |
| MAX7359ETG+ | IC KEY SWITCH 2WIRE 24-TQFN |
| USB-232-SS | IC USB ASYNC SRL UART 20-SSOP |
| MS27473E24F61P | CONN PLUG 61POS STRAIGHT W/PINS |
| MS27474E10F98PA | CONN RCPT 6POS JAM NUT W/PINS |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1875T+ | 功能描述:ADC / DAC多通道 PON Triplexer & SFP Controller 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 |
| DS1875T+T&R | 制造商:Maxim Integrated Products 功能描述:PON TRIPLEXER 38TQFN EP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC SFP CTRLR/TRIPLEXER 38-TQFN 制造商:Maxim Integrated Products 功能描述:ADC / DAC Multichannel PON Triplexer & SFP Controller |
| DS1875T+T&R | 功能描述:ADC / DAC多通道 PON Triplexer & SFP Controller 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 |
| DS1875T+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:PON Triplexer and SFP Controller |
| DS1876 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP Controller with Dual LDD Interface |
发布紧急采购，3分钟左右您将得到回复。