74151 TTL 8选1数据选择器

DM74150,DM74151A

Data Selectors/Multiplexers

General Description

These data selectors/multiplexers contain full on-chip decod-ing to select the desired data source.The150selects one-of-sixteen data sources;the151A selects one-of-eight data sources.The150and151A have a strobe input which must be at a low logic level to enable these devices.A high level at the strobe forces the W output high and the Y output (as applicable)low.

The151A features complementary W and Y outputs, whereas the150has an inverted(W)output only.

The151A incorporates address buffers which have sym-metrical propagation delay times through the complementary paths.This reduces the possibility of transients occurring at the output(s)due to changes made at the select inputs,even when the151A outputs are enabled(i.e.,strobe low).Features

n150selects one-of-sixteen data lines

n151A selects one-of-eight data lines

n Performs parallel-to-serial conversion

n Permits multiplexing from N lines to one line

n Also for use as Boolean function generator

n Typical average propagation delay time,data input to W output

15011ns

151A9ns

n Typical power dissipation

150200mW

151A135mW

n Alternate Military/Aerospace device(54150,54151A)is available.Contact a Fairchild Semiconductor Sales

Office/Distributor for specifications.

Connection Diagrams

Dual-In-Line Package

DS006546-1 Order Number54150DQMB,54150FMQB,

DM54150J or DM74150N

See Package Number J24A,N24A or W24C

Dual-In-Line Package

DS006546-2 Order Number54151ADMQB,54151AFMQB, DM54151AJ,DM54151AW or DM74151AN See Package Number J16A,N16E or W16A

Absolute Maximum Ratings(Note1)

Supply Voltage7V Input Voltage 5.5V Operating Free Air Temperature Range

DM54and54−55˚C to+125˚C DM740˚C to+70˚C Storage Temperature Range−65˚C to+150˚C

Recommended Operating Conditions

Symbol Parameter DM54150DM74150Units

Min Nom Max Min Nom Max

V CC Supply Voltage 4.55 5.5 4.755 5.25V

V IH High Level Input Voltage22V

V IL Low Level Input Voltage0.80.8V

I OH High Level Output Current−0.8−0.8mA I OL Low Level Output Current1616mA T A Free Air Operating Temperature−55125070˚C Note1:The“Absolute Maximum Ratings”are those values beyond which the safety of the device cannot be guaranteed.The device should not be operated at these limits.The parametric values defined in the“Electrical Characteristics”table are not guaranteed at the absolute maximum ratings.The“Recommended Operating Conditions”table will define the conditions for actual device operation.

’150Electrical Characteristics

over recommended operating free air temperature range(unless otherwise noted)

Symbol Parameter Conditions Min Typ Max Units

(Note2)

V I Input Clamp Voltage V CC=Min,I I=−12mA−1.5V

V OH High Level Output V CC=Min,I OH=Max 2.4V Voltage V IL=Max,V IH=Min

V OL Low Level Output V CC=Min,I OL=Max0.4V Voltage V IH=Min,V IL=Max

I I Input Current@Max V CC=Max,V I=5.5V1mA

Input Voltage

I IH High Level Input Current V CC=Max,V I=2.4V40µA I IL Low Level Input Current V CC=Max,V I=0.4V−1.6mA I OS Short Circuit V CC=Max DM54−20−55mA

Output Current(Note3)DM74−18−55

I CC Supply Current V CC=Max,(Note4)4068mA

Note2:All typicals are at V CC=5V,T A=25˚C.

Note3:Not more than one output should be shorted at a time.

Note4:I CC is measured with the strobe and data select inputs at4.5V,all other inputs and outputs open.

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