參數(shù)資料
型號(hào)： X9525B20I
廠商： INTERSIL CORP
元件分類： 數(shù)字電位計(jì)
英文描述： Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules
中文描述： DUAL 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, BGA20
封裝： CSP-20
文件頁(yè)數(shù)： 6/26頁(yè)
文件大?。?/td> 578K
代理商： X9525B20I
6
FN8210.0
March 10, 2005
Hot Pluggability
Figure 7 shows a typical waveform that the X9525 might
experience in a Hot Pluggable situation. On power-up,
Vcc applied to the X9525 may exhibit some amount of
ringing, before it settles to the required value.
The device is designed such that the wiper terminal
(R
Wx
) is recalled to the correct position (as per the last
stored in the DCP NVM), when the voltage applied to
Vcc exceeds V
TRIP
for a time exceeding t
pu
.
Therefore, if
t
trans
is defined as the time taken for Vcc to
settle above V
TRIP
(Figure 7): then the desired wiper ter-
minal position is recalled by (a maximum) time:
t
trans
+
t
pu
. It should be noted that
t
trans
is determined by sys-
tem hot plug conditions.
DCP Operations
In total there are three operations that can be performed
on any internal DCP structure:
—DCP Nonvolatile Write
—DCP Volatile Write
—DCP Read
A nonvolatile write to a DCP will change the “wiper
position” by simultaneously writing new data to the
associated WCR and NVM. Therefore, the new “wiper
position” setting is recalled into the WCR after Vcc of the
X9525 is powered down and then powered back up.
A volatile write operation to a DCP however, changes the
“wiper position” by writing new data to the associated
WCR only. The contents of the associated NVM register
remains unchanged. Therefore, when Vcc to the device
is powered down then back up, the “wiper position”
reverts to that last position written to the DCP using a
nonvolatile write operation.
Both volatile and nonvolatile write operations are
executed using a three byte command sequence: (DCP)
Slave Address Byte, Instruction Byte, followed by a Data
Byte (See Figure 9).
A DCP Read operation allows the user to “read out” the
current “wiper position” of the DCP, as stored in the
associated WCR. This operation is executed using the
Random Address Read command sequence, consisting
of the (DCP) Slave Address Byte followed by an
Instruction Byte and the Slave Address Byte again (Refer
to Figure 10.).
Instruction Byte
While the Slave Address Byte is used to select the DCP
devices, an Instruction Byte is used to determine which
DCP is being addressed.
The Instruction Byte (Figure 8) is valid only when the
Device Type Identifier and the Internal Device Address
bits of the Slave Address are set to 1010A
0
11. In this
case, the two Least Significant Bit’s (I1 - I0) of the
Instruction Byte are used to select the particular DCP
(0 - 2). In the case of a Write to any of the DCPs (i.e. the
LSB of the Slave Address is 0), the Most Significant Bit
of the Instruction Byte (I7), determines the Write Type
(WT) performed.
If WT is “1”, then a Nonvolatile Write to the DCP
occurs.
In this case, the “wiper position” of the DCP is changed
by simultaneously writing new data to the associated
WCR and NVM. Therefore, the new “wiper position” set-
ting is recalled into the WCR after Vcc of the X9525 has
been powered down then powered back up
If WT is “0” then a DCP Volatile Write is performed. This
operation changes the DCP “wiper position” by writing
new data to the associated WCR only. The contents of
Figure 7.
DCP Power-up
t
Vcc
V
TRIP
Vcc (Max.)
t
pu
Maximum Wiper Recall time
0
t
trans
X9525
相關(guān)PDF資料
PDF描述
X9525 Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules
X9525V20I Fiber Channel/Gigabit Etherner Laser Diode Control for Fiber Optic Modules
X9530 Temperature Compensated Laser Diode Controller(帶溫度補(bǔ)償?shù)募す舛O管控制器)
X95840 Quad Digital Controlled Potentiometers
X95840WV20I-2.7 Quad Digital Controlled Potentiometers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
X9525BZ WAF 制造商:Intersil Corporation 功能描述:
X9525V20I 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動(dòng)器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝
X9525V20IT1 功能描述:IC DCP DUAL EEPROM MEM 20-TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 激光驅(qū)動(dòng)器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:60 系列:- 類型:激光二極管驅(qū)動(dòng)器 數(shù)據(jù)速率:- 通道數(shù):4 電源電壓:3.3V 電流 - 電源:- 電流 - 調(diào)制:- 電流 - 偏置:- 工作溫度:0°C ~ 70°C 封裝/外殼:40-TQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:40-TQFN EP 包裝:托盤 安裝類型:表面貼裝
X9525V20IZ 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Dual DCP, EEPROM Memory
X9530 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Temperature Compensated Laser Diode Controller
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*