|74LCX157 Low Voltage Quad 2-Input Multiplexer with 5V Tolerant Inputs
The 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 (noninverted) form. The LCX157 can also be used as a function generator. The 74LCX157 is fabricated with advanced CMOS technology to achieve high speed operation while maintaining CMOS low power dissipation.
s 5V tolerant inputs s 2.3V3.6V VCC specifications provided 5.8 ns tPD max (VCC 10 µA ICC max s Power down high impedance inputs and outputs ±24 mA output drive (VCC 3.0V) s Implements patented noise/EMI reduction circuitry s Latch-up performance exceeds mA s ESD performance: Human body model > 2000V Machine model > 200V
Order Number 74LCX157SJ 74LCX157MTC Package Number M16D MTC16 Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Pin Names E S ZaZd Description Source 0 Data Inputs Source 1 Data Inputs Enable Input Select Input Outputs
The is a quad 2-input multiplexer. It selects four bits of data from two sources under the control of a common 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 LCX157 is the logic implementation 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the Select input. The logic equations for the outputs are shown below: S) A common use of the LCX157 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 as a function generator. The LCX157 can generate any four of the sixteen different functions of two variables with one variable common. This is useful for implementing gating functions.
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
Symbol VCC VI VO IIK IOK IO ICC IGND TSTG Parameter Supply Voltage DC Input Voltage DC Output Voltage DC Input Diode Current DC Output Diode Current DC Output Source/Sink Current DC Supply Current per Supply Pin DC Ground Current per Ground Pin Storage Temperature Value Conditions Units V Output in HIGH or LOW State (Note VI < GND VO < GND VO > VCC V mA
Symbol VCC VI VO IOH/IOL Supply Voltage Input Voltage Output Voltage Output Current HIGH or LOW State VCC - 3.6V VCC - 3.0V VCC 2.7V TA Free-Air Operating Temperature Input Edge Rate, VIN - 2.0V, VCC = 3.0V Parameter Operating Data Retention Min Max 3.6 5.5 VCC Units V mA
Note 1: 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 tables are not guaranteed at the Absolute Maximum Ratings. The "Recommended Operating Conditions" table will define the conditions for actual device operation. Note 2: IO Absolute Maximum Rating must be observed. Note 3: Unused inputs must be held HIGH or LOW. They may not float.
Symbol VIH VIL VOH Parameter HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage IOH -100 µA IOH -8 mA IOH -12 mA IOH -18 mA IOH -24 mA VOL LOW Level Output Voltage IOL 100 µA IOH 8 mA IOL 12 mA IOL 16 mA IOL mA II IOFF ICC Input Leakage Current Power-Off Leakage Current Quiescent Supply Current Increase in ICC per Input CC or GND VI 5.5V VIH = VCC -0.6V Conditions VCC (V) VCC to +85°C Min Max V Units