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SN74ACT7801-20FN 数据表(PDF) 2 Page - Texas Instruments |
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SN74ACT7801-20FN 数据表(HTML) 2 Page - Texas Instruments |
2 / 19 page SN74ACT7801 1024 × 18 CLOCKED FIRST IN, FIRST OUT MEMORY SCAS111 − D3489, APRIL 1990 − REVISED MAY 1991 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 2 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 PN PACKAGE (TOP VIEW) 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 SN74ACT7801 is a 1024- × 18-bit FIFO for high speed and fast access times. It processes data at rates up to 40 MHz and access times of 15 ns in a bit-parallel format. Data outputs are noninverting with respect to the data inputs. Expansion is easily accomplished in both word width and word depth. The SN74ACT7801 has normal input-bus-to-output-bus asynchronous operation. The special enable circuitry adds the ability to synchronize independent read and write (interrupts, requests) to their respective system clock. |
类似零件编号 - SN74ACT7801-20FN |
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类似说明 - SN74ACT7801-20FN |
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