PDF HT24LC16 Data sheet ( Hoja de datos )

Número de pieza	HT24LC16
Descripción	CMOS 16K 2-Wire Serial EEPROM
Fabricantes	Holtek Semiconductor Inc
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No Preview Available ! HT24LC16 CMOS 16K 2-Wire Serial EEPROM Features · Operating voltage: 2.2V~5.5V · Low power consumption - Operation: 5mA max. - Standby: 5mA max. · Internal organization: 2048´8 · 2-wire Serial Interface · Write cycle time: 5ms max. · Automatic erase-before-write operation · Partial page write allowed · 16-byte Page Write Mode · Write operation with built-in timer · Hardware controlled write protection · 40-year data retention · 106 rewrite cycles per word · Commercial temperature range (0°C to +70°C) · 8-pin DIP/SOP package General Description The HT24LC16 is an 16K-bit serial read/write non-volatile memory device using the CMOS floating gate process. Its 16384 bits of memory are organized into 2048 words and each word is 8 bits. The device is optimized for use in many industrial and commercial ap- plications where low power and low voltage operation are essential. Up to only one HT24LC16 device may be connected to the same 2-wire bus. The HT24LC16 is guaranteed for 1M erase/write cycles and 40-year data retention. Block Diagram Pin Assignment SCL SDA WP A 0~A 2 VCC VSS I/O C o n tro l L o g ic M e m o ry C o n tro l L o g ic A d d re s s C o u n te r H V P um p X D EEPRO M E A rra y C P a g e B u ffe r YDEC S ense A M P R /W C o n tro l A0 1 A1 2 A2 3 VSS 4 8 VCC 7 WP 6 SCL 5 SDA H T24LC 16 8 D IP -A /S O P -A Pin Description Pin Name A0~A2 SDA SCL WP VSS VCC I/O I I/O I I ¾ ¾ Description Address input Serial data Serial clock input Write protect Negative power supply, ground Positive power supply Rev. 1.30 1 November 25, 2003 1 page HT24LC16 · Current address read The internal data word address counter maintains the last address accessed during the last read or write op- eration, incremented by one. This address stays valid between operations as long as the chip power is main- tained. The address roll over during read from the last byte of the last memory page to the first byte of the first page. The address roll over during write from the last byte of the current page to the first byte of the same page. Once the device address with the read/write se- lect bit set to one is clocked in and acknowledged by the EEPROM, the current address data word is seri- ally clocked out. The microcontroller should respond with a ²no ACK² signal (high) followed by a stop condi- tion (refer to Current read timing). · Random read A random read requires a dummy byte write sequence to load in the data word address which is then clocked in and acknowledged by the EEPROM. The microcontroller must then generate another start con- dition. The microcontroller now initiates a current ad- dress read by sending a device address with the read/write select bit high. The EEPROM acknowl- edges the device address and serially clocks out the data word. The microcontroller should respond with a ²no ACK² signal (high) followed by a stop condition (refer to Random read timing). · Sequential read Sequential reads are initiated by either a current ad- dress read or a random address read. After the microcontroller receives a data word, it responds with an acknowledgment. As long as the EEPROM re- ceives an acknowledgment, it will continue to incre- ment the data word address and serially clock out sequential data words. When the memory address limit is reached, the data word address will roll over and the sequential read continues. The sequential read operation is terminated when the microcontroller responds with a ²no ACK² signal (high) followed by a stop condition. SDA S S ta rt D e v ic e a d d r e s s D ATA A2 A1 A0 ACK Current Read Timing S to p P No ACK D e v ic e a d d r e s s W o rd a d d re s s D e v ic e a d d r e s s SDA S S ta rt A2 A1 A0 ACK S ACK S ta rt ACK Random Read Timing D ATA S to p P No ACK D e v ic e a d d r e s s SDA S S ta rt ACK D ATA n D A TA n+1 ACK Sequential Read Timing D A TA n+x S to p P No ACK Rev. 1.30 5 November 25, 2003 5 Page HT24LC16 Holtek Semiconductor Inc. (Headquarters) No.3, Creation Rd. II, Science Park, Hsinchu, Taiwan Tel: 886-3-563-1999 Fax: 886-3-563-1189 http://www.holtek.com.tw Holtek Semiconductor Inc. (Taipei Sales Office) 4F-2, No. 3-2, YuanQu St., Nankang Software Park, Taipei 115, Taiwan Tel: 886-2-2655-7070 Fax: 886-2-2655-7373 Fax: 886-2-2655-7383 (International sales hotline) Holtek Semiconductor Inc. (Shanghai Sales Office) 7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China 200233 Tel: 021-6485-5560 Fax: 021-6485-0313 http://www.holtek.com.cn Holtek Semiconductor Inc. (Shenzhen Sales Office) 43F, SEG Plaza, Shen Nan Zhong Road, Shenzhen, China 518031 Tel: 0755-8346-5589 Fax: 0755-8346-5590 ISDN: 0755-8346-5591 Holtek Semiconductor Inc. (Beijing Sales Office) Suite 1721, Jinyu Tower, A129 West Xuan Wu Men Street, Xicheng District, Beijing, China 100031 Tel: 010-6641-0030, 6641-7751, 6641-7752 Fax: 010-6641-0125 Holmate Semiconductor, Inc. (North America Sales Office) 46712 Fremont Blvd., Fremont, CA 94538 Tel: 510-252-9880 Fax: 510-252-9885 http://www.holmate.com Copyright Ó 2003 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek as- sumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek¢s products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw. Rev. 1.30 11 November 25, 2003 11 Page

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