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TMS55171 Dataheets PDF



Part Number TMS55171
Manufacturers Texas Instruments
Logo Texas Instruments
Description 262144 BY 16-BIT MULTIPORT VIDEO RAMS
Datasheet TMS55171 DatasheetTMS55171 Datasheet (PDF)

TMS55160, TMS55161, TMS55170, TMS55171 262144 BY 16-BIT MULTIPORT VIDEO RAMS D Organization: DRAM: 262 144 Words × 16 Bits SAM: 256 Words × 16 Bits D Single 5.0-V Power Supply (±10%) D Dual-Port Accessibility – Simultaneous and Asynchronous Access From the DRAM and Serial-Address-Memory (SAM) Ports D Write-per-Bit Function for Selective Write to Each I/O of the DRAM Port D Byte-Write Function for Selective Write to Lower Byte (DQ0 – DQ7) or Upper Byte (DQ8– DQ15) of the DRAM Port D 4 - Column o.

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TMS55160, TMS55161, TMS55170, TMS55171 262144 BY 16-BIT MULTIPORT VIDEO RAMS D Organization: DRAM: 262 144 Words × 16 Bits SAM: 256 Words × 16 Bits D Single 5.0-V Power Supply (±10%) D Dual-Port Accessibility – Simultaneous and Asynchronous Access From the DRAM and Serial-Address-Memory (SAM) Ports D Write-per-Bit Function for Selective Write to Each I/O of the DRAM Port D Byte-Write Function for Selective Write to Lower Byte (DQ0 – DQ7) or Upper Byte (DQ8– DQ15) of the DRAM Port D 4 - Column or 8 - Column Block - Write Function for Fast Area - Fill Operations D Enhanced Page Mode for Faster Access With Extended-Data-Output (EDO) Option for Faster System Cycle Time D CAS-Before-RAS (CBR) and Hidden Refresh Functions D Long Refresh Period – Every 8 ms (Maximum) D Full - Register- Transfer Function Transfers Data from the DRAM to the Serial Register performance ranges SMVS464 – MARCH1996 D Split-Register-Transfer Function Transfers Data from the DRAM to One-Half of the Serial Register While the Other Half is Outputing Data to the SAM Port D 256 Selectable Serial Register Starting Points D Programmable Split-Register Stop Point D Up to 55-MHz Uninterrupted Serial-Data Streams D 3-State Serial Outputs for Easy Multiplexing of Video Data Streams D All Inputs/Outputs and Clocks TTL Compatible D Compatible With JEDEC Standards D Designed to Work With the Texas Instruments (TI) Graphics Family D Fabricated Using TI’s Enhanced Performance Implanted CMOS (EPIC) Process – 60 Speed – 70 Speed ACCESS TIME ROW ENABLE tRAC (MAX) 60 ns 70 ns ACCESS TIME SERIAL DATA tSCA (MIN) 15 ns 20 ns DRAM PAGE CYCLE TIME tPC (MIN) 35 ns 40 ns DRAM EDO CYCLE TIME tPC (MIN) 30 ns 30 ns SERIAL CYCLE TIME tSCC (MIN) 18 ns 22 ns OPERATING CURRENT SERIAL PORT STANDBY lCC1 (MAX) 180 mA 165 mA DEVICE 55160 55161 55170 55171 Table 1. Device Option Table POWER SUPPLY VOLTAGE 5.0 V ± 0.5 V 5.0 V ± 0.5 V 5.0 V ± 0.5 V 5.0 V ± 0.5 V BLOCK-WRITE CAPABILITY 4 -column 4 -column 8 - column 8 - column PAGE / EDO OPERATION Page EDO Page EDO Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. TI and EPIC are trademarks of Texas Instruments Incorporated. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright  1996, Texas Instruments Incorporated •POST OFFICE BOX 1443 HOUSTON, TEXAS 77251–1443 1 TMS55160, TMS55161, TMS55170, TMS55171 262144 BY 16-BIT MULTIPORT VIDEO RAMS SMVS464 – MARCH1996 DGH PACKAGE (TOP VIEW) VCC TRG VSS SQ0 DQ0 SQ1 DQ1 VCC SQ2 DQ2 SQ3 DQ3 VSS SQ4 DQ4 SQ5 DQ5 VCC SQ6 DQ6 SQ7 DQ7 VSS CASL WE RAS A8 A7 A6 A5 A4 VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32.


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