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SN74HC148 Datasheet(PDF) 1 Page - Texas Instruments |
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SN74HC148 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 17 page SN54HC148, SN74HC148 8LINE TO 3LINE PRIORITY ENCODERS SCLS109G − MARCH 1984 − REVISED APRIL 2004 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Wide Operating Voltage Range of 2 V to 6 V D Outputs Can Drive Up To 10 LSTTL Loads D Low Power Consumption, 80-µA Max ICC D Typical tpd = 16 ns D ±4-mA Output Drive at 5 V D Low Input Current of 1 µA Max D Encode Eight Data Lines to 3-Line Binary (Octal) D Applications Include: − n-Bit Encoding − Code Converters and Generators description/ordering information The ’HC148 devices feature priority decoding of the inputs to ensure that only the highest-order data line is encoded. These devices encode eight data lines to 3-line (4-2-1) binary (octal). Cascading circuitry (enable input EI and enable output EO) has been provided to allow octal expansion without the need for external circuitry. Data inputs and outputs are active at the low logic level. ORDERING INFORMATION TA PACKAGE† ORDERABLE PART NUMBER TOP-SIDE MARKING PDIP − N Tube of 25 SN74HC148N SN74HC148N Tube of 40 SN74HC148D −40 °C to 85°C SOIC − D Reel of 2500 SN74HC148DR HC148 −40 °C to 85°C SOIC − D Reel of 250 SN74HC148DT HC148 SOIC − DW Reel of 2000 SN74HC148DWR HC148 SOP − NS Reel of 2000 SN74HC148NSR HC148 CDIP − J Tube of 25 SNJ54HC148J SNJ54HC148J −55 °C to 125°C CFP − W Tube of 150 SNJ54HC148W SNJ54HC148W −55 C to 125 C LCCC − FK Tube of 55 SNJ54HC148FK SNJ54HC148FK † 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. 32 1 20 19 910 11 1213 4 5 6 7 8 18 17 16 15 14 GS 3 NC 2 1 6 7 NC EI A2 SN54HC148 . . . FK PACKAGE (TOP VIEW) NC − No internal connection 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 4 5 6 7 EI A2 A1 GND VCC EO GS 3 2 1 0 A0 SN54HC148 ...J OR W PACKAGE SN74HC148 . . . D, DW, N, OR NS PACKAGE (TOP VIEW) Copyright 2004, 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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