LP2996 Datasheet, PDF(8/18 Page) National Semiconductor (TI) – DDR Termination Regulator

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

LP2996 Datasheet, PDF (8/18 Pages) National Semiconductor (TI) – DDR Termination Regulator

◁

ÏÏ©Î¿Î«à¨¤

àªà»

LP2996 Í¸ÉºJEDEC à¶ªà¥ªÍ· SSTL-2 à¢à¼·Í´à°¦ß¹Í¢Î DDR-

SDRAM ÏÎµÉ¾Î»ÊÏÏÊÎ³Ï£Ï¯Í·Ï¦ÏÎÉ¾Ï¨ÎªÏ¡Ï¨ÊÎ»Í°Í¢É» VTT

à¥à¾Í´Í¸ VDDQ/2 Í´à±³Í ÍÏ¨ÎªÏ¡Ï¨ÊÏà°¿Ñ¹Íà²ÎÎÉºà°¿à½¶Í¸Î³

Ï¯Î«Í±Î¹ÊÎµÍ·à¾à¹Í´à¬°Ô Í Í¯ÍÎÍ¢É» à¥à¾à®Í¸à¼ÎÍ¨à·ÕÏ¨

ÎªÏ¡Ï¨ÊÎ³Ï£Ï¯ÎÒ¡à£Í¢ÎÎÍÍ´àªÍÜÎÍ¯ÍÎÉºØà¯¨à°¿à½¶Í·àµà©

Íà¹·à¢ÍÎÍ¯ÍÎÍ¢É»ÎÍ¨ÉºLP2996 Í¸ 2 à¤à¾¨Í·ÒÍ³Îà°¿Ý¯Ï¨Ê

Ï§ ( à°¿Ñ¹ ) Í°Í·à²à¡Í´à¬°Ô Í Í¯ÍÎÉºÏÏ«Êà¥à¾à®Í±ÎÏÏ©Î¬Õ³

à¿Îà·¼à½Í°ÍÎÍ¢É» Ý¯à°¿Îà·¼×Í¢ÎÍ±Éºà²ºà·¦à¦«à¶à°¿à¾Í·à¯¿Ý®Î

à¨¤ÎÎÍ¢É»ÎÍ¨ LP2996 Í¸Éºà£à©àÍ· DDR-SDRAM ÏÏÏ¦(DDR

II) Í´à¬°Ô Í Í¨Î»ÊÏÏÊÎ³Ï£Ï¯É¾Î¹Ï¦Ï¡ÊÎ³Ï£Ï¯Îßà©Õà³³Í°Í¢É»Î

Í¨ÉºSSTL-3 Î HSTL Í±ÍÍ¬Í¨ÉºÒÍ³ÎÏ©Î´Î¿Î« I/F à¼»Í·Î»ÊÏÏÊ

Î³Ï£Ï¯à°¿Ñ¹Îà©à©Í°ÍÎÍ¢É»

Î³Ï¦ÊÎ¶É¾ÎµÎ»ÏÉ¾Î»ÊÏÏÊÏÎ¿ÏÉ¾Ï©Î´Î¿Î« (SSTL) Í¸ÉºÏÏÏ¦Ï

ÎµÍ·ÏÊÎ»à°¸à«¹à£Í·à§´ß¸à¶¼à£ÎÕ¾àª³Í¢ÎÍ¨ÎÍ´ÖàµÍÎÎÍ Í¨É»

ÍÍ·Î»ÊÏÏÊÎ³Ï£Ï¯à¹à£Í¸Éºß´Íà¤ªà³¾à¨ºÍ° DDR-SDRAM Í·ÏÊ

Î»à°¸à«¹Îß¦Íà¡Í´Éºà§´ß¸àµà£¹Í´ÎÎÏÊÎ»É¾Î¤Ï¥ÊÎà¹·ÍÍ¨ÎÍ´Í¸

à·ÕÜ½Í±Í¢ÎÍÝ´É» à ·ÎÒ°àµ à°¤Í³Î»ÊÏÏÊÎ³Ï£Ï¯Õ³à¿à£ÜÍ¸Éº

Î½Î¿ÏÎ·Î¿ÏÍ±ÏÏÏ¦Í·ØÍ´ 1 ÍÍ·à¯à¾»à°ß RS ÎàªÍÉºÍÎÍ´Î»Ê

ÏÏÊÎ³Ï£Ï¯à°ß RT Î 1 Íà¼»ÍÎÉºClass II Î³Î¬ÏÏ§É¾ÏÏ¥Ï¨Ï§É¾

Î»ÊÏÏÊÎ³Ï£Ï¯Í°Í¢É» Õ³à¿Í·à¾«Î Figure 1 Í´à£Í ÎÍ¢É»

FIGURE 1. SSTL-Termination Scheme

www.national.com/jpn/

8

▷