74LVQ157SJX

74LVQ157SJX Datasheet

74LVQ157 Low Voltage Quad 2-Input Multiplexer

Part	Datasheet
74LVQ157SJX	74LVQ157SJX (pdf)

Related Parts	Information
74LVQ157SC	74LVQ157SC
74LVQ157SJ	74LVQ157SJ
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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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: 74LVQ157SJX 513407