LTC1391 - 8-Channel Analog Multiplexer with Cascadable Serial Interface


  • Low RON: 45 Ohm
  • Single 2.7V to ±5V Supply Operation
  • Low Charge Injection
  • Serial Digital Interface
  • Analog Inputs May Extend to Supply Rails
  • Low Leakage: ±5nA Max
  • Guaranteed Break-Before-Make
  • TTL/CMOS Compatible for All Digital Inputs
  • Cascadable to Allow Additional Channels
  • Can Be Used as a Demultiplexer

Typical Application

LTC1391 Typical Application
LTC1391 Typical Application


The LTC®1391 is a high performance CMOS 8-to-1 analog multiplexer. It features a serial digital interface that allows several LTC1391s to be daisy-chained together, increasing the number of MUX channels available using a single digital port.

The LTC1391 features a typical RON of 45 Ohm, a typical switch leakage of 50pA and guaranteed break-beforemake operation. Charge injection is ±10pC maximum. All digital inputs are TTL and CMOS compatible when operated from single or dual supplies. The inputs can withstand 100mA fault current.

The LTC1391 is available in 16-pin PDIP, SSOP and narrow SO packages. For applications requiring 2-way serial data transmission, see the LTC1390 data sheet.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC1391CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1391CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC1391CN#PBF N-16 N C 05-08-1510 (N16) Yes
LTC1391CS#PBF SO-16 S C 05-08-1610 (S16) Yes
LTC1391CS#TRPBF SO-16 S C 05-08-1610 (S16) Yes
LTC1391IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC1391IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC1391IS#PBF SO-16 S I 05-08-1610 (S16) Yes
LTC1391IS#TRPBF SO-16 S I 05-08-1610 (S16) Yes

LTC1391 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC1391CGN#PBF SSOP-16 C $3.25 $2.65 Yes
LTC1391CGN#TRPBF SSOP-16 C $2.71 Yes
LTC1391CN#PBF N-16 C $2.90 $2.30 Yes
LTC1391CS#PBF SO-16 C $3.10 $2.40 Yes
LTC1391CS#TRPBF SO-16 C $2.46 Yes
LTC1391IGN#PBF SSOP-16 I $3.70 $3.05 Yes
LTC1391IGN#TRPBF SSOP-16 I $3.11 Yes
LTC1391IS#PBF SO-16 I $3.55 $2.85 Yes
LTC1391IS#TRPBF SO-16 I $2.91 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards


  • Data Acquisition Systems
  • Communication Systems
  • Signal Multiplexing/Demultiplexing

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