74AC153 74ACT153 Dual 4-Input Multiplexer November 1988 Revised November 1999 74AC153 74ACT153 Dual 4-Input Multiplexer General Description Features The AC/ACT153 is a high-speed dual 4-input multiplexer I reduced by 50% CC with common select inputs and individual enable inputs for Outputs source/sink 24 mA each section. It can select two lines of data from four ACT153 has TTL-compatible inputs sources. The two buffered outputs present data in the true (non-inverted) form. In addition to multiplexer operation, the AC/ACT153 can act as a function generator and gener- ate any two functions of three variables. Ordering Code: Order Number Package Number Package Description 74AC153SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Body 74AC153SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74AC153MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide 74AC153PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 74ACT153SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow Body 74ACT153MTC MTC16 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Device also available in Tape and Reel. Specify by appending suffix letter X to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Pin Descriptions Pin Names Description I I Side A Data Inputs 0a 3a I I Side B Data Inputs 0b 3b S , S Common Select Inputs 0 1 E Side A Enable Input a E Side B Enable Input b Z Side A Output a Z Side B Output b FACT is a trademark of Fairchild Semiconductor Corporation. 1999 Fairchild Semiconductor Corporation DS009928 www.fairchildsemi.comFunctional Description Truth Table The AC/ACT153 is a dual 4-input multiplexer. It can select Select two bits of data from up to four sources under the control of Inputs (a or b) Output Inputs the common Select inputs (S , S ). The two 4-input multi- 0 1 plexer circuits have individual active-LOW Enables (E , E ) a b S S E I I I I Z 0 1 0 1 2 3 which can be used to strobe the outputs independently. XX H XXX X L When the Enables (E , E ) are HIGH, the corresponding a b LL LL X X X L outputs Z , Z ) are forced LOW. The AC/ACT153 is the a b LL L H X X X H logic implementation of a 2-pole, 4-position switch, where the position of the switch is determined by the logic levels HL L X L X X L supplied to the Select inputs. The logic equations for the outputs are shown below. HL L X H X X H LH L X X L X L Z = E (I S S + I S S + a a 0a 1 0 1a 1 0 LH L X X H X H I S S + I S S ) 2a 1 0 3a 1 0 HH L X X X L L Z = E (I S S + I S S + b b 0b 1 0 1b 1 0 HH L X X X H H I S S + I S S ) 2b 1 0 3b 1 0 H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.fairchildsemi.com 2 74AC153 74ACT153