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SN74ACT7882 데이터시트(PDF) 2 Page - Texas Instruments |
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SN74ACT7882 데이터시트(HTML) 2 Page - Texas Instruments |
2 / 15 page SN74ACT7882 2048 × 18 CLOCKED FIRST-IN, FIRST-OUT MEMORY SCAS445C – JUNE 1994 – REVISED APRIL 1998 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 PN PACKAGE (TOP VIEW) 22 23 VCC VCC NC Q3 Q2 GND Q1 Q0 VCC HF IR GND GND AF/AE VCC WRTEN2 WRTEN1 WRTCLK GND NC 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 24 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 NC GND GND Q16 Q17 VCC OR GND VCC RESET OE RDEN2 RDEN1 RDCLK GND D17 D16 D15 NC NC 25 26 27 28 79 78 77 76 75 80 74 72 71 70 73 29 30 31 32 33 69 68 21 67 66 65 64 34 35 36 37 38 39 40 63 62 61 NC – No internal connection description A FIFO memory is a storage device that allows data to be written into and read from its array at independent data rates. The SN74ACT7882 is organized as 2048 bits deep × 18 bits wide. The SN74ACT7882 processes data at rates up to 67 MHz and access times of 11 ns in a bit-parallel format. Data outputs are noninverting with respect to the data inputs. Expansion is accomplished easily in both word width and word depth. The SN74ACT7882 has normal input-bus to output-bus asynchronous operation. The special enable circuitry adds the ability to synchronize independent reads and writes to their respective system clocks. The SN74ACT7882 is characterized for operation from 0 °C to 70°C. |
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