BU9889GUL-W Rohm, BU9889GUL-W Datasheet

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... High Reliability Series Serial EEPROM Series WL-CSP EEPROM family I2C BUS BU9889GUL-W ●Description BU9889GUL serial EEPROM of I ●Features 1) Completely conforming to the world standard I All controls available by 2 ports of serial clock (SCL) and serial data (SDA words×8 bits architecture 8kbit serial EEPROM. ...

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... BU9889GUL-W ●Electrical characteristics Parameter Symbol "H" Input Voltage1 "L" Input Voltage1 "L" Output Voltage1 V "L" Output Voltage2 V Input Leakage Current Output Leakage Current Current consumption at action Standby Current ○Radiation resistance design is not made. ●Action timing characteristics Parameter SCL Frequency Data clock " ...

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... BU9889GUL-W ●Sync data input/output timing tR tF tHIGH SCL tSU:DAT tLOW tHD:STA SDA (Input) (入力) tBUF tPD SDA (Output) (出力) ○Input read at the rise edge of SCL ○Data output in sync with the fall of SCL Fig.1-(a) Sync data input / output timing SCL ...

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... SDA GND A2 ○ ○ ○ SCL VCC BU9889GUL-W (BOTTOM VIEW) ●Characteristic data (The following values are Typ. ones.) 6 Ta=-40℃ 5 Ta=25℃ Ta=85℃ SPEC SUPPLY VOLTAGE : Vcc(V) Fig.3 'H' input voltage V Fig.3　 ...

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... BU9889GUL-W ●Characteristic data (The following values are Typ. ones.) 2.5 SPEC 2 1.5 Ta=-40℃ Ta=25℃ 1 Ta=85℃ 0 SUPPLY VOLTAGE : Vcc(V) Fig.9 Current consumption at WRITE operation I (fscl=400kHz) 10000 1000 SPEC 100 Ta=-40℃ Ta=25℃ 10 Ta=85℃ SUPPLY VOLTAGE : Vcc(V) Fig.12　SCL frequency f ...

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... BU9889GUL-W ●Characteristic data (The following values are Typ. ones.) 6 SPEC Ta=-40℃ Ta=25℃ 1 Ta=85℃ SUPPLY VOLTAGE : Vcc(V) Fig.24 Internal writing cycle time　ｔ WR 0.6 Ta=-40℃ 0.5 Ta=25℃ Ta=85℃ 0.4 0.3 0.2 SPEC 0 SUPPLY VOLATGE : Vcc(V) Fig.27　Noise resuction efecctive time　ｔ ...

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... BU9889GUL-W 2 ●I C BUS communication 2 C BUS data communication ○ BUS data communication starts by start condition input, and ends by stop condition input. Data is always 8bit long, I and acknowledge is always required after each byte BUS carries out data transmission with plural devices connected by 2 communication lines of serial data (SDA) and serial clock (SCL). Among devices, there are “ ...

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... BU9889GUL-W ●Write Command ○Write cycle ・Arbitrary data is written to EEPROM. When to write only 1 byte, byte write normally used, and when to write continuous data of 2 bytes or more, simultaneous write is possible by page write cycle SLAVE T T ADDRESS E ADDRESS SDA WA LINE ...

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... BU9889GUL-W ○Notes on page write cycle Maximum page number is 16 bytes for this IC. Any bytes below these can be written. The page write cycle write time is 5ms at maximum for 16byte bulk write. It does not stand 5ms at maximum × 16byte = 80ms(Max.). ○Internal address increment ...

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... BU9889GUL-W ●Read Command ○Read cycle Data of EEPROM is read. In read cycle, there are random read cycle and current read cycle. Random read cycle is a command to read data by designating address, and is used generally. Current read cycle is a command to read data of internal address register without designating address, and is used when to verify just after write cycle ...

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... BU9889GUL-W ●Software reset Software reset is executed when to avoid malfunction after power on, and to reset during command input. Software reset has several kinds, and 3 kids of them are shown in the figure below. (Refer to Fig.38(a), Fig.38(b), Fig.38(c).) In dummy clock input area, release the SDA bus ('H' by pull up). In dummy clock area, ACK output and read data '0' (both 'L' level) may be output from EEPROM, therefore, if 'H' is input forcibly, output may conflict and over current may flow, leading to instantaneous power failure of system power source or influence upon devices ...

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... BU9889GUL-W ●WP valid timing (write cancel usually fixed to 'H' or 'L', but when WP is used to cancel write cycle and so forth, pay attention to the following WP valid timing. During write cycle execution, in cancel valid area, by setting WP='H', write cycle can be cancelled. In both byte write cycle and page write cycle, the area from the first start condition of command to the rise of clock to taken data(in page write cycle, the first byte data) is cancel invalid area ...

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... BU9889GUL-W ●I/O peripheral circuit ○Pull up resistance of SDA terminal SDA is NMOS open drain, so requires pull up resistance. As for this resistance value (R this resistance value from microcontroller V limited. The smaller the R , the larger the consumption current at action. PU ○Maximum value The maximum value determined by the following factors. ...

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... BU9889GUL-W ●Cautions on microcontroller connection ○ BUS recommended that SDA port is of open drain input/output. However, when to use CMOS input / output of tri state to SDA port, insert a series resistance Rs between the pull up resistance Rpu and the SDA terminal of EEPROM. This is controls over current that occurs when PMOS of the microcontroller and NMOS of EEPROM are turned ON simultaneously ...

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... BU9889GUL-W ● I2C BUS input / output circuit ○ Input (A2, SCL, WP) Fig.47 Input pin circuit diagram ○ Input/Output (SDA) Fig.48 Input /output pin circuit diagram ●Notes on power ON At power on internal circuit and set, Vcc rises through unstable low voltage area, and IC inside is not completely reset, and malfunction may occur ...

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... BU9889GUL-W ●Low voltage malfunction prevention function LVCC circuit prevents data rewrite action at low power, and prevents wrong write. At LVCC voltage (Typ. =1.2V) or below, it prevent data rewrite. ●Vcc noise countermeasures ○ Bypass capacitor When noise or surge gets in the power source line, malfunction may occur, therefore, for removing these recommended to attach a bypass capacitor (0.1µ ...

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... BU9889GUL-W ●Ordering part number Part No. Part No. VCSP50L1 (BU9889GUL-W) 1PIN MARK 1.60±0.05 0. φ 0.15)INDEX POST 6- φ 0.25±0.05 0. 0.30 P=0.5×2 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved Package GUL : VCSP50L1 <Tape and Reel information> Tape ...

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... ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing ...