74LVQ157SC

74LVQ157SC Datasheet


74LVQ157 Low Voltage Quad 2-Input Multiplexer

Part Datasheet
74LVQ157SC 74LVQ157SC 74LVQ157SC (pdf)
Related Parts Information
74LVQ157SJ 74LVQ157SJ 74LVQ157SJ
74LVQ157SJX 74LVQ157SJX 74LVQ157SJX
74LVQ157SCX 74LVQ157SCX 74LVQ157SCX
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74LVQ157 Low Voltage Quad 2-Input Multiplexer
74LVQ157 Low Voltage Quad 2-Input Multiplexer

The LVQ157 is a high-speed quad 2-input multiplexer. Four bits of data from two sources can be selected using the common Select and Enable inputs. The four outputs present the selected data in the true non inverted form. The LVQ157 can also be used as a function generator.
s Ideal for low power/low noise 3.3V applications s Guaranteed simultaneous switching noise level and
dynamic threshold performance s Guaranteed pin-to-pin skew AC performance s Guaranteed incident wave switching into
Ordering Code:

Order Number Package Number

Package Description
74LVQ157SC

M16A
16-Lead Small Outline Integrated Circuit SOIC , JEDEC MS-012, Narrow
74LVQ157SJ

M16D
16-Lead Small Outline Package SOP , EIAJ TYPE II, 5.3mm Wide
Devices 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 E S

Description Source 0 Data Inputs Source 1 Data Inputs

Enable Input Select Input

Outputs
2001 Fairchild Semiconductor Corporation DS011352
74LVQ157

Truth Table

Inputs

H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial

Logic Diagram

Functional Description

Outputs

The LVQ157 is a quad 2-input multiplexer. It selects four bits of data from two sources under the control of a com-
mon Select input S . The Enable input E is active-LOW.

When E is HIGH, all of the outputs Z are forced LOW regardless of all other inputs. The LVQ157 is the logic
implementation of a 4-pole, 2-position switch where the
position of the switch is determined by the logic levels sup-
plied to the Select input. The logic equations for the outputs
are shown below:

Za = E
• I1a
• S + I0a
• S

Zb = E
• I1b
• S + I0b
• S

Zc = E
• I1c
• S + I0c
• S

Zd = E
• I1d
• S + I0d
• S

A common use of the LVQ157 is the moving of data from
two groups of registers to four common output busses. The
particular register from which the data comes is determined
by the state of the Select input. A less obvious use is as a
function generator. The LVQ157 can generate any four of
the sixteen different functions of two variables with one
variable common. This is useful for implementing gating
functions.

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
74LVQ157

Absolute Maximum Ratings Note 1

Supply Voltage VCC DC Input Diode Current IIK

VI = −0.5V VI = VCC + 0.5V DC Input Voltage VI DC Output Diode Current IOK VO = −0.5V VO = VCC + 0.5V DC Output Voltage VO DC Output Source
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Datasheet ID: 74LVQ157SC 513407