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SN74ABT2244N Scheda tecnica(PDF) 1 Page - Texas Instruments |
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SN74ABT2244N Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 7 page SN54ABT2244, SN74ABT2244 OCTAL BUFFERS AND LINE/MOS DRIVERS WITH 3-STATE OUTPUTS SCBS106B – JANUARY 1991 – REVISED JULY 1994 Copyright © 1994, Texas Instruments Incorporated 6–1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 • Output Ports Have Equivalent 25-Ω Series Resistors, So No External Resistors Are Required • State-of-the-Art EPIC-ΙΙB™ BiCMOS Design Significantly Reduces Power Dissipation • Typical V OLP (Output Ground Bounce) < 1 V at VCC = 5 V, TA = 25°C • Package Options Include Plastic Small-Outline (DW), Shrink Small-Outline (DB), and Thin Shrink Small-Outline (PW) Packages, Ceramic Chip Carriers (FK), and Plastic (N) and Ceramic (J) DIPs description These octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. Taken together with the ′ABT2240 and ′ABT2241, these devices provide the choice of selected combinations of inverting and noninverting outputs, symmetrical active-low output-enable (OE) inputs, and complementary OE and OE inputs. These devices feature high fan-out and improved fan-in. The outputs, which are designed to sink up to 12 mA, include 25- Ω series resistors to reduce overshoot and undershoot. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. The SN74ABT2244 is available in TI’s shrink small-outline package (DB), which provides the same I/O pin count and functionality of standard small-outline packages in less than half the printed-circuit-board area. The SN54ABT2244 is characterized for operation over the full military temperature range of – 55 °C to 125°C. The SN74ABT2244 is characterized for operation from – 40 °C to 85°C. FUNCTION TABLE (each buffer) INPUTS OUTPUT OE A Y L H H L LL H X Z 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1OE 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND VCC 2OE 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1 SN54ABT2244 ...J PACKAGE SN74ABT2244 . . . DB, DW, N, OR PW PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 1Y1 2A4 1Y2 2A3 1Y3 1A2 2Y3 1A3 2Y2 1A4 SN54ABT2244 . . . FK PACKAGE (TOP VIEW) EPIC- ΙΙB is a trademark 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. |
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