參數(shù)資料
型號(hào)： LP3907SQ-JIXI
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 1.5 A DUAL SWITCHING CONTROLLER, 2100 kHz SWITCHING FREQ-MAX, QCC24
封裝： 4 X 4 MM, 0.8 MM HEIGHT, LLP-24
文件頁(yè)數(shù)： 21/44頁(yè)
文件大?。?/td> 3058K
代理商： LP3907SQ-JIXI
TRANSFERRING DATA
Every byte put on the SDA line must be eight bits long, with
the most significant bit (MSB) being transferred first. Each
byte of data has to be followed by an acknowledge bit. The
acknowledged related clock pulse is generated by the master.
The transmitter releases the SDA line (HIGH) during the ac-
knowledge clock pulse. The receiver must pull down the SDA
line during the 9th clock pulse, signifying acknowledgement.
A receiver which has been addressed must generate an ac-
knowledgement (“ACK”) after each byte has been received.
After the START condition, the I2C master sends a chip ad-
dress. This address is seven bits long followed by an eighth
bit which is a data direction bit (R/W). Please note that ac-
cording to industry I2C standards for 7-bit addresses, the MSB
of an 8-bit address is removed, and communication actually
starts with the 7th most significant bit. For the eighth bit (LSB),
a “0” indicates a WRITE and a “1” indicates a READ. The
second byte selects the register to which the data will be writ-
ten. The third byte contains data to write to the selected
register.
The LP3907 has factory-programmed I2C addresses. The
LLP chip has a chip address of 60'h, while the micro SMD chip
has a chip address of 61'h.
30017818
I2C Chip Address (see note above)
30017819
w = write (SDA = “0”)
r = read (SDA = “1”)
ack = acknowledge (SDA pulled down by either master or slave)
rs = repeated start
id = LP3907 LLP chip address: 0x60; micro SMD chip address: 0x61
I2C Write Cycle
When a READ function is to be accomplished, a WRITE func-
tion must precede the READ function, as shown in the Read
Cycle waveform.
30017824
I2C Read Cycle
www.national.com
28
LP3907
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LP3907SQ-JXQX 制造商:Texas Instruments 功能描述:
LP3907SQ-JXQX/NOPB 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
LP3907SQ-JXQX/S7001874 制造商:Texas Instruments 功能描述:NSCLP3907SQ-JXQX@S7001874 1A&0.6A BUCKS
LP3907SQ-JXQXEV 功能描述:LP3907 EVALUATION BOARD RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開(kāi)關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LP3907SQ-JXQXEV/NOPB 功能描述:BOARD EVAL FOR LP3907 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - DC/DC 與 AC/DC（離線）SMPS 系列:PowerWise® 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開(kāi)關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
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