TC528128B

The TC528128B is a CMOS multiport memory equipped with a 131,072-words by 8-bits dynamic random access memory (RAM) port and a 256-words by 8-bits static serial access memory (SAM) port. The TC528128B supports three types of operations; Random access to and from the RAM port, high speed serial access to and from the SAM port and bidirectional transfer of data between any selected row in the RAM port and the SAM port. The RAM port and the SAM port can be accessed independently except when data is being transferred between them internally. In addition to the conventional multiport videoram operating modes, the TC528128B features the block write and flash write functions on the RAM port and a split register data transfer capability on the SAM port. The TC528128B is fabricated using Toshiba's CMOS silicon gate process as well as advanced circuit designs to provide low power dissipation and wide operating margins.

The features of TC528128B can be summarized as (1)single power supply of 5Vil0% with a built-in VBB generator; (2)all inputs and outputs: TTL compatible; (3)organization RAM port: 131,072 words x 8bits, SAM port : 256 words x 8bits; (4)RAM port fast page mode read - modify - write CAS before RAS refresh, hidden refresh ras only refresh, write per bit flash write, block write 512 refresh cycles/8ms; (5)SAM port high speed serial read / write capability 256, tap locations, fully static register; (6)RAM - SAM Bidirectional Transfer read/write/pseudo write transfer real time read transfer split read i write transfer; (7)Package TC528l28BJ : SOJ40-P-400/TC528128BZ : ZIP40-P-475 .

The absolute maximum ratings of TC528128B are (1)VIN, VOUT input output voltage: -1.0~7.0V; (2)VCC power supply voltage: - 1.0~7 .0V; (3)TOPR operating temperature: 0~70°C; (4)TSTG storage temperature: - 55~150°C; (5)TSOLDER soldering temperature - time: 260-10°C·sec; (6)power dissipation: 1W; (7)IOUT short circuit output current: 50 mA.