器件名称:
74148
功能描述:
10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
文件大小:
177.29KB 共22页
简 介:
SN54147, SN54148, SN54LS147, SN54LS148 SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148 10LINE TO 4LINE AND 8LINE TO 3LINE PRIORITY ENCODERS SDLS053B OCTOBER 1976 REVISED MAY 2004 D D ’147, ’LS147 Encode 10-Line Decimal to 4-Line BCD Applications Include: Keyboard Encoding Range Selection D D ’148, ’LS148 Encode 8 Data Lines to 3-Line Binary (Octal) Applications Include: n-Bit Encoding Code Converters and Generators SN54147, SN54LS147 . . . J OR W PACKAGE SN74147, SN74LS147 . . . D OR N PACKAGE (TOP VIEW) SN54148, SN54LS148 . . . J OR W PACKAGE SN74148, SN74LS148 . . . D, N, OR NS PACKAGE (TOP VIEW) 4 5 6 7 8 C B GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC NC D 3 2 1 9 A 4 5 6 7 EI A2 A1 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC E0 GS 3 2 1 0 A0 SN54LS147 . . . FK PACKAGE (TOP VIEW) SN54LS148 . . . FK PACKAGE (TOP VIEW) 5 4 NC VCC NC 6 7 NC 8 C 4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13 5 4 NC VCC E0 D 3 NC 2 1 6 7 NC EI A2 4 5 6 7 8 3 2 1 20 19 18 17 16 15 14 9 10 11 12 13 GS 3 NC 2 1 B GND NC A 9 NC No internal connection TYPICAL DATA DELAY 10 ns 10 ns 15 ns 15 ns TYPICAL POWER DISSIPATION 225 mW 190 mW 60 mW 60 mW TYPE ’147 ’148 ’LS147 ’LS148 NOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaim……
