SZZA030E August   2021  – June 2022 CD4016B , CD4016B-MIL , CD4051B , CD4051B-MIL , CD4051B-Q1 , CD4052B , CD4052B-MIL , CD4053B , CD4053B-MIL , CD4053B-Q1 , CD4066B , CD4066B-MIL , CD4066B-Q1 , CD4067B , CD4067B-MIL , CD4097B , CD4097B-MIL , CD54HC4051 , CD54HC4052 , CD54HC4053 , CD54HC4066 , CD54HC4316 , CD54HC4351 , CD54HCT4051 , CD74HC4016 , CD74HC4051 , CD74HC4051-EP , CD74HC4051-Q1 , CD74HC4052 , CD74HC4053 , CD74HC4066 , CD74HC4067 , CD74HC4316 , CD74HC4351 , CD74HC4352 , CD74HCT4051 , CD74HCT4051-Q1 , CD74HCT4052 , CD74HCT4053 , CD74HCT4066 , CD74HCT4066-Q1 , CD74HCT4067 , CD74HCT4067-Q1 , CD74HCT4316 , CD74HCT4351 , LMH6580 , LMH6583 , LMH6586 , LMS4684 , MAX4594 , MAX4595 , MAX4596 , MAX4597 , MPC506 , MPC507 , MPC508 , MPC509 , MUX36D04 , MUX36D08 , MUX36S08 , MUX36S16 , MUX506 , MUX507 , MUX508 , MUX509 , SN3257-Q1 , SN54CBTD3384 , SN74AHC4066 , SN74AUC1G66 , SN74AUC2G53 , SN74AUC2G66 , SN74CB3Q16210 , SN74CB3Q16211 , SN74CB3Q16244 , SN74CB3Q16245 , SN74CB3Q16811 , SN74CB3Q3125 , SN74CB3Q3244 , SN74CB3Q3245 , SN74CB3Q3251 , SN74CB3Q3253 , SN74CB3Q3257 , SN74CB3Q3305 , SN74CB3Q3306A , SN74CB3Q3306A-EP , SN74CB3Q3345 , SN74CB3Q3384A , SN74CB3Q6800 , SN74CB3T16210 , SN74CB3T16210-Q1 , SN74CB3T16211 , SN74CB3T16212 , SN74CB3T1G125 , SN74CB3T1G125-Q1 , SN74CB3T3125 , SN74CB3T3245 , SN74CB3T3253 , SN74CB3T3257 , SN74CB3T3306 , SN74CB3T3383 , SN74CB3T3384 , SN74CBT16209A , SN74CBT16210 , SN74CBT16210C , SN74CBT16211A , SN74CBT16211C , SN74CBT16212A , SN74CBT16212C , SN74CBT16213 , SN74CBT16214 , SN74CBT16214C , SN74CBT162292 , SN74CBT16232 , SN74CBT16233 , SN74CBT16244 , SN74CBT16244C , SN74CBT16245 , SN74CBT16245C , SN74CBT16292 , SN74CBT16390 , SN74CBT16800C , SN74CBT16811C , SN74CBT16861 , SN74CBT1G125 , SN74CBT1G384 , SN74CBT3125 , SN74CBT3125C , SN74CBT3126 , SN74CBT3244 , SN74CBT3244C , SN74CBT3245A , SN74CBT3245C , SN74CBT3251 , SN74CBT3253 , SN74CBT3253C , SN74CBT3257 , SN74CBT3257C , SN74CBT3305C , SN74CBT3306 , SN74CBT3306C , SN74CBT3345 , SN74CBT3345C , SN74CBT3383 , SN74CBT3383C , SN74CBT3384A , SN74CBT3384C , SN74CBT34X245 , SN74CBT3861 , SN74CBT6800A , SN74CBT6800C , SN74CBT6845C , SN74CBTD16210 , SN74CBTD16211 , SN74CBTD1G125 , SN74CBTD1G384 , SN74CBTD3305C , SN74CBTD3306 , SN74CBTD3306C , SN74CBTD3384 , SN74CBTD3384C , SN74CBTD3861 , SN74CBTH16211 , SN74CBTK6800 , SN74CBTLV16210 , SN74CBTLV16211 , SN74CBTLV16212 , SN74CBTLV16292 , SN74CBTLV16800 , SN74CBTLV1G125 , SN74CBTLV1G125-Q1 , SN74CBTLV3125 , SN74CBTLV3126 , SN74CBTLV3245A , SN74CBTLV3251 , SN74CBTLV3253 , SN74CBTLV3257 , SN74CBTLV3257-EP , SN74CBTLV3383 , SN74CBTLV3384 , SN74CBTLV3857 , SN74CBTLV3861 , SN74CBTLV3861-Q1 , SN74CBTS16211 , SN74CBTS16212 , SN74CBTS3306 , SN74CBTS3384 , SN74CBTS6800 , SN74HC151-Q1 , SN74HC4066 , SN74HC4851 , SN74HC4851-Q1 , SN74HC4852 , SN74HC4852-Q1 , SN74LV4051A , SN74LV4051A-EP , SN74LV4051A-Q1 , SN74LV4052A , SN74LV4052A-EP , SN74LV4052A-Q1 , SN74LV4053A , SN74LV4053A-EP , SN74LV4053A-Q1 , SN74LV4066A , SN74LVC1G3157 , SN74LVC1G3157-Q1 , SN74LVC1G66 , SN74LVC1G66-Q1 , SN74LVC2G53 , SN74LVC2G66 , SN74LVC2G66-Q1 , SN74TVC16222A , SN74TVC3010 , SN74TVC3306 , TMUX1072 , TMUX1101 , TMUX1102 , TMUX1104 , TMUX1108 , TMUX1109 , TMUX1111 , TMUX1112 , TMUX1113 , TMUX1119 , TMUX1121 , TMUX1122 , TMUX1123 , TMUX1133 , TMUX1134 , TMUX1136 , TMUX1204 , TMUX1208 , TMUX1209 , TMUX1219 , TMUX1247 , TMUX1308 , TMUX1308-Q1 , TMUX1309 , TMUX136 , TMUX1511 , TMUX154E , TMUX1574 , TMUX4051 , TMUX4052 , TMUX4053 , TMUX6104 , TMUX6111 , TMUX6112 , TMUX6113 , TMUX6119 , TMUX6121 , TMUX6122 , TMUX6123 , TMUX6136 , TS12A12511 , TS12A44513 , TS12A44514 , TS12A44515 , TS12A4514 , TS12A4515 , TS12A4516 , TS12A4517 , TS3A225E , TS3A24157 , TS3A24159 , TS3A27518E , TS3A27518E-Q1 , TS3A44159 , TS3A4741 , TS3A4742 , TS3A4751 , TS3A5017 , TS3A5017-Q1 , TS3A5018 , TS3A5223 , TS5A1066 , TS5A12301E , TS5A2053 , TS5A2066 , TS5A21366 , TS5A22362 , TS5A22364 , TS5A22364-Q1 , TS5A22366 , TS5A23157 , TS5A23157-Q1 , TS5A23159 , TS5A23160 , TS5A23166 , TS5A23167 , TS5A26542 , TS5A3153 , TS5A3154 , TS5A3157 , TS5A3159 , TS5A3159-EP , TS5A3159-Q1 , TS5A3159A , TS5A3160 , TS5A3166 , TS5A3166-Q1 , TS5A3167 , TS5A3357 , TS5A3357-Q1 , TS5A3359 , TS5A4594 , TS5A4595 , TS5A4596 , TS5A4597 , TS5A4624 , TS5A623157 , TS5A63157 , TS5A6542 , TS5A9411 , TS5MP645 , TS5MP646 , TS5N118 , TS5N214 , TS5N412

 

  1.   Selecting the Correct Texas Instruments Signal Switch
  2.   Trademarks
  3. 1Introduction
    1. 1.1 Ideal Versus Non-Ideal Switch
  4. 2Basic Signal Switch Structure
    1. 2.1 NFET Switch
    2. 2.2 Transmission Gate Switch
    3. 2.3 NFET With Charge Pump
  5. 3Analog Versus Digital Signal Switches
    1. 3.1 Bidirectional Switches
    2. 3.2 Configuration and Channels
  6. 4Signal Switch Specifications and Features
  7. 5Texas Instruments Analog Signal Switches and Multiplexers Portfolio
    1. 5.1 Precision Switches and Multiplexers
    2. 5.2 Protection Switches and Multiplexers
    3. 5.3 General Purpose Switches and Multiplexers
    4. 5.4 Automotive Switches and Multiplexers
  8. 6Switches and Multiplexers Performance in Digital Signal Applications
  9. 7Applications
    1. 7.1 SPI Multiplexing
    2. 7.2 Multiplexing Signals to External ADC
    3. 7.3 Multiplexing Signals to External ADC in Fault Sensitive Conditions
    4. 7.4 Switchable Op Amp Gain Setting
    5. 7.5 Multiplexing Body Control Module (BCM) Inputs
    6. 7.6 High Current Range Selection Using External Resistor
    7. 7.7 Fault Protection in Factory Automation Control Systems
    8. 7.8 Sample and Hold Circuitry
  10. 8Summary
  11. 9Revision History
  12.   A Appendix A
    1.     A.1 Analog Performance – CD, HC, CBT, LVC, and LV
    2.     A.2 SN74CBT Characteristics
    3.     A.3 CD74HCT Characteristics
    4.     A.4 CD74HC Characteristics
    5.     A.5 SN74HC Characteristics
    6.     A.6 CD4066B Characteristics
    7.     A.7 LV-A Characteristics
    8.     A.8 LVC Characteristics
    9.     A.9 CBTLV Characteristics

2.2 Transmission Gate Switch

Analog (or bilateral, as they also are called) switches consist of a single N-channel transistor in parallel with a single P-channel transistor (see Figure 2-3). These are also known as the Transmission gate switch.

GUID-B0BF0EEC-CB9F-4FA9-ABA2-15947EBF406D-low.gifFigure 2-3 Parallel N-/P-Channel FET (Transmission Gate) Switch

As before, when VI/O approaches VCC, the N-channel conductance decreases (RON increases) while the P-channel gate-source voltage is maximum and its RON is minimal. The resulting parallel resistance combination is much flatter than individual channel resistances (see Figure 2-4). Examples of switches and multiplexers with parallel n and p channel include TMUX11xx, TMUX61xx, TMUX12xx, TMUX13xx, TMUX6xxx, TMUX7xxx, TMUX8xxx, TS5Axxxx, TS3Axxxx, HCT, HC, CD4000, TMUX40xx, LV-A, LVC, and CBTLV families.

GUID-183D3B8F-5ED5-43AB-8CD4-408CBD6D5AE5-low.gifFigure 2-4 On-State Resistance vs Input Voltage for a Parallel n-/p-Channel FET Switch

A flat RON is especially important if VI/O signals must swing from rail to rail. However, the tradeoff is increased switch capacitance due to the additional P-channel transistor and associated bias circuitry.