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SN74HC251DBR Datasheet(PDF) 1 Page - Texas Instruments |
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SN74HC251DBR Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page SN54HC251, SN74HC251 DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SCLS132E − DECEMBER 1982 − REVISED SEPTEMBER 2003 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D 3-State Version of ’HC151 D Wide Operating Voltage Range of 2 V to 6 V D High-Current 3-State Outputs Interface Directly With System Bus or Can Drive Up To 15 LSTTL Loads D Low Power Consumption, 80-µA Max ICC D Typical tpd = 9 ns D ±6-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Perform Parallel-to-Serial Conversion D Complementary Outputs Provide True and Inverted Data description/ordering information These data selectors/multiplexers contain full binary decoding to select 1-of-8 data sources and feature strobe-controlled complementary 3-state outputs. The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (in the high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Both outputs are controlled by the output-enable (OE) input. The outputs are disabled when OE is high. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube of 25 SN74HC251N SN74HC251N Tube of 40 SN74HC251D SOIC − D Reel of 2500 SN74HC251DR HC251 SOIC − D Reel of 250 SN74HC251DT HC251 −40 °C to 85°C SOP − NS Reel of 2000 SN74HC251NSR HC251 −40 C to 85 C SSOP − DB Reel of 2000 SN74HC251DBR HC251 Tube of 90 SN74HC251PW TSSOP − PW Reel of 2000 SN74HC251PWR HC251 TSSOP − PW Reel of 250 SN74HC251PWT HC251 CDIP − J Tube of 25 SNJ54HC251J SNJ54HC251J −55 °C to 125°C CFP − W Tube of 150 SNJ54HC251W SNJ54HC251W −55 C to 125 C LCCC − FK Tube of 55 SNJ54HC251FK SNJ54HC251FK † Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 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. SN54HC251 ...J OR W PACKAGE SN74HC251 . . . D, DB, N, NS, OR PW PACKAGE (TOP VIEW) 32 1 20 19 910 11 12 13 4 5 6 7 8 18 17 16 15 14 D5 D6 NC D7 A D1 D0 NC Y W SN54HC251 . . . FK PACKAGE (TOP VIEW) 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 D3 D2 D1 D0 Y W OE GND VCC D4 D5 D6 D7 A B C NC − No internal connection Copyright 2003, 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. On products compliant to MILPRF38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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