74HCT251N ,8-input multiplexer; 3-stateFEATURES The 74HC/HCT251 are the logic implementations ofsingle-pole 8-position switches with the s ..
74HCT251N ,8-input multiplexer; 3-stateGENERAL DESCRIPTIONwhen the output enable input is HIGH, allowing multiplexerexpansion by tying the ..
74HCT251PW ,8-input multiplexer; 3-stateFEATURES The 74HC/HCT251 are the logic implementations ofsingle-pole 8-position switches with the s ..
74HCT253 ,3-state
74HCT253 ,3-state
74HCT253D ,Dual 4-input multiplexer; 3-stateFEATURES The 74HC/HCT253 have two identical 4-input multiplexerswith 3-state outputs which select t ..
74VHC4046N ,CMOS Phase Lock LoopBlock Diagram 274VHC404674VHC4046Absolute Maximum Ratings(Note 1) Recommended Operating (Note 2)Con ..
74VHC4051M ,8-Channel Analog Multiplexer74VHC4051 • 74VHC4052 • 74VHC4053 8-Channel Analog Multiplexer • Dual 4-Channel Analog Multiplexer ..
74VHC4051MTC ,8-Channel Analog MultiplexerGeneral Descriptionselect lines determine which switch in each 4 channel sec-These multiplexers are ..
74VHC4051MTCX ,8-Channel Analog MultiplexerGeneral Descriptionselect lines determine which switch in each 4 channel sec-These multiplexers are ..
74VHC4051MX ,8-Channel Analog MultiplexerGeneral Descriptionselect lines determine which switch in each 4 channel sec-These multiplexers are ..
74VHC4051MX ,8-Channel Analog Multiplexer74VHC4051 • 74VHC4052 • 74VHC4053 8-Channel Analog Multiplexer • Dual 4-Channel Analog Multiplexer ..
74HC251N-74HCT251D-74HCT251N-74HCT251PW
8-input multiplexer; 3-state
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
FEATURES True and complement outputs Both outputs are 3-state for further multiplexer
expansion Multifunction capability Permits multiplexing from n-lines to one line Output capability: standard ICC category: MSI
GENERAL DESCRIPTIONThe 74HC/HCT251 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
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. The logic
function provided at the output, when activated, is: OE.(I0.S0.S1.S2 + I1.S0.S1.S2+ I2.S0.S1.S2+ I3.S0.S1.S2+ I4.S0.S1.S2+ I5.S0.S1.S2+ I6.S0.S1.S2+ I7.S0.S1.S2)
Both outputs are in the high impedance OFF-state (Z)
when the output enable input is HIGH, allowing multiplexer
expansion by tying the outputs.
QUICK REFERENCE DATAGND = 0 V; Tamb = 25 °C; tr = tf = 6 ns
Notes CPD is used to determine the dynamic power dissipation (PDin μW): = CPD× VCC2×fi +∑ (CL× VCC2×fo) where: = input frequency in MHz = output frequency in MHz (CL× VCC2×fo) = sum of outputs= output load capacitance in pF
VCC= supply voltage in V For HC the condition is VI = GND to VCC
For HCT the condition is VI = GND to VCC− 1.5 V
ORDERING INFORMATIONSee “74HC/HCT/HCU/HCMOS Logic Package Information”.
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
PIN DESCRIPTION
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
FUNCTION TABLE
Note H = HIGH voltage level = LOW voltage level = don’t care= high impedance OFF-state
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
DC CHARACTERISTICS FOR 74HCFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
AC CHARACTERISTICS FOR 74HCGND = 0 V; tr = tf = 6 ns; CL = 50 pF
Philips Semiconductors Product specification
8-input multiplexer; 3-state 74HC/HCT251
DC CHARACTERISTICS FOR 74HCTFor the DC characteristics see “74HC/HCT/HCU/HCMOS Logic Family Specifications”.
Output capability: standard
ICC category: MSI
Note to HCT typesThe value of additional quiescent supply current (ΔICC) for a unit load of 1 is given in the family specifications.
To determine ΔICC per input, multiply this value by the unit load coefficient shown in the table below.
AC CHARACTERISTICS FOR HCTGND = 0 V; tr = tf = 6 ns; CL = 50 pF
