GENERAL DESCRIPTION
MSM6684B is a serial register organized as 4,194,304 words x one bit, characterized by medium speed, low power consumption operation.
This device has a built-in internal address generation circuit allowing continuous serial read/write operation by external clock input.
Read/write operation causes the internal address to be incremented automatically by +1.
External address input enables addressing in units of 1024 words. Furthermore, a refresh timer and a refresh address counter are installed, which makes an external refresh circuit unnecessary. In addition, this configuration allows lower power consumption.
The device is packaged in 26/20-pin SOJ having a width of 300 mil.
It is well adapted for storing much data by means of a battery backup. Its combination with our recording and playback LSI enables the easy implementation of a solid recording and playback system.

FEATURES
• Configuration
   4,194,304 x 1 bit
• Serial access operation
   Serial access time : 1.5 ms
   Serial read/write time : 2.5 ms
• Low current drain
   150 mA max. (VCC = 4 V with data stored and under standard conditions)
• Refresh operation
   A self-refresh function is supported.
• Wide operation voltage range
   Single 3.5 to 5.5 V
• Addressing
   Units of 1024 words
• Process
   0.45 mm double well CMOS process
• Package :
   26/20-pin plastic SOJ (SOJ26/20-P-300-1.27) (Product name : MSM6684BJS)