INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT251 8-input multiplexer; 3-state Product specification File under Integrated Circuits, IC06 December 1990
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 The 74HC/HCT251 are the logic implementations of single-pole 8-position switches with the state of three select inputs (S0, S1, S2) controlling the switch positions. Assertion (Y) and negation (Y) outputs are both provided. The output enable input (OE) is active LOW.
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 PIN DESCRIPTION PIN NO. SYMBOL NAME AND FUNCTION 4, 3, 2, 1, 15, 14, 13, 12 I0 to I7 multiplexer inputs 5 Y multiplexer output 6 Y complementary multiplexer output 7 OE 3-state output enable input (active LOW) 8 GND ground (0 V) 11, 10, 9 S0, S1, S2 select inputs 16 VCC positive supply voltage Fig.1 Pin configuration. December 1990 Fig.2 Logic symbol. 3 Fig.3 IEC logic symbol.
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 FUNCTION TABLE INPUTS OUTPUTS OE S2 S1 S0 I0 I1 I2 I3 I4 I5 I6 I7 Y Y H X X X X X X X X X X X Z Z L L L L L L L L L L L L L L H H L H X X X X L H X X X X X X X X X X X X X X X X X X X X X X X X H L H L L H L H L L L L L L L L H H H H L L H H X X X X X X X X L H X X X X L H X X X X X X X X X X X X X X X X H L H L L H L H L L L L H H H H L L L L L L H H X X X
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 DC CHARACTERISTICS FOR 74HC For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI AC CHARACTERISTICS FOR 74HC GND = 0 V; tr = tf = 6 ns; CL = 50 pF Tamb (°C) TEST CONDITIONS 74HC SYMBOL PARAMETER +25 −40 to +85 min. typ. max. min. max. −40 to +125 UNIT V WAVEFORMS CC (V) min. max.
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 DC CHARACTERISTICS FOR 74HCT For the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”. Output capability: standard ICC category: MSI Note to HCT types The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
Philips Semiconductors Product specification 8-input multiplexer; 3-state 74HC/HCT251 AC WAVEFORMS (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3V; VI = GND to 3 V. Fig.6 Waveforms showing the multiplexer input (In) and select input (Sn) to output (Y) propagation delays and the output transition times. (1) HC : VM = 50%; VI = GND to VCC. HCT: VM = 1.3V; VI = GND to 3 V. Fig.