Dual current limited overvoltage protected digital termination

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  • The PCLT-2A is a dual input current limiter device designed for 24 V DC automation applications.

    This product is compatible with the type 2 (7.5 mA) or type 3 (3 mA) characteristic of the IEC 61131-2 standard. An internal resistance RREFallows the limiting current value to be adjusted from 3 to 7.5 mA.
    Each input voltage clamping block protects the module input against electromagnetic interference such as those described in the IEC 61131-2 standard, IEC 61000-4-2 (ESD), 4-4 (transient burst), 4-5 (voltage surge) and 4-6 (conducted radio frequency interference) standards. The supply input is also designed with such a protection structure.
    The low tolerance of the current limitation allows a drastic reduction in the dissipation of the input compared to a resistive input. The PCLT2 is packaged in TSSOP14 - a very low RTHexposed pad package that allows the PCB cooling pad to be reduced.
    The output block of each termination channel transfers the input logic state to a logic output and a light emitting diode (LED).

    Key Features

    • 2 channel topology: low side input with common ground
    • Wide range input DC voltage:
      • VI= - 0.3 to 30 V with RI= 0 Ω
      • VI= - 30 to 35 V with RI= 750 Ω
    • Current limiter:
      • 3 to 7.5 mA programmable reference
      • ILIM= 6.1 mA to 8.8 mA with RREF= 10 kΩ
      • ILIM= 2.8 mA to 4.3 mA with RREF= 22 kΩ
      • Narrow limiter spread: < 17%
      • Temperature compensated operation
    • Output drive:
      • No output activation below 2 mA input
      • 1.5 mA minimum output activating current in opto-coupler mode
      • Programmable CMOS output mode option (VMOD> 2.9 V)
    • LED drive for sensor status: 4.4 mA typical with RREF= 10 kΩ
    • Input protection (RI= 750 Ω CIN= 22 nF)
    • IEC 61000-4-2 ESD, Level 4
      • In contact, ± 8 kV; in air, ± 15 kV
      • Criteria B: temporary disruption
    • IEC 61000-4-5 voltage surge, Level 3
      • ± 500 V with 42 Ω series resistor in differential mode
      • Criteria B: temporary disruption
    • IEC 61000-4-4 transient burst immunity
      • ± 4 kV peak voltage; 5 kHz repetitive rate
      • Criteria A: fully functional
    • IEC 61000-4-6 conducted RFI
      • 10 VRMS
      • Criteria A: fully functional
    • Input protection against -30 V reverse polarity
    • Ambient temperature: -25 to 85 °C
    • Benefits
      • Enable input to meet type1, 2 and 3 characteristics of IEC 61131-2 standard
      • Compatible operation with 2 and 3 wires proximity sensor according EN60947-5-2 standard
      • Flexible configuration driving either opto- coupler, or CMOS bus controller input, or 12 V AS-Interface network
      • Reduced overall dissipation
      • Enhanced functional reliability
      • Compact with high integration
      • Surface mount package for highly automated assembly
      • Insensitive to the on-state sensor impedance

Circuit Diagram

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Part Number
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Country of Origin
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PCLT-2AT4-TR HTSSOP14 Tape And Reel
Active
1.2621 100 EAR99 PHILIPPINES Check Availability

Distributor availability ofPCLT-2AT4-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2090 1 Order Now
RS COMPONENTS EUROPE 2500 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 2500 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
MOUSER WORLDWIDE 5263 1 Order Now
Farnell Element14 EUROPE 2828 1 Order Now
RUTRONIK EUROPE 20000 2500 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

DIGIKEY

Stock

2090

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2500

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5263

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2828

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

20000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-08

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PCLT-2AT4 HTSSOP14 Tube
Active
1.2621 100 EAR99 PHILIPPINES Check Availability

Distributor availability ofPCLT-2AT4

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 953 1 Order Now
ARROW EUROPE 177 0 Order Now
MOUSER WORLDWIDE 906 1 Order Now
Farnell Element14 EUROPE 895 1 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

DIGIKEY

Stock

953

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

177

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

906

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

895

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-08

Buy now

PCLT-2AT4-TR

Package

HTSSOP14

Packing Type

Tape And Reel

Unit Price (US$)

1.2621*

Distributor availability ofPCLT-2AT4-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 2090 1 Order Now
RS COMPONENTS EUROPE 2500 1 Order Now
FUTURE WORLDWIDE 2500 2500 Order Now
ARROW EUROPE 2500 0 Order Now
Newark Element14 AMERICA 6 0 Order Now
MOUSER WORLDWIDE 5263 1 Order Now
Farnell Element14 EUROPE 2828 1 Order Now
RUTRONIK EUROPE 20000 2500 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

DIGIKEY

Stock

2090

Min.Order

1

Region

WORLDWIDE Order Now

RS COMPONENTS

Stock

2500

Min.Order

1

Region

EUROPE Order Now

FUTURE

Stock

2500

Min.Order

2500

Region

WORLDWIDE Order Now

ARROW

Stock

2500

Min.Order

0

Region

EUROPE Order Now

Newark Element14

Stock

6

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

5263

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

2828

Min.Order

1

Region

EUROPE Order Now

RUTRONIK

Stock

20000

Min.Order

2500

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-08

Marketing Status

Active

Unit Price (US$)

1.2621

Quantity

100

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

PCLT-2AT4

Package

HTSSOP14

Packing Type

Tube

Unit Price (US$)

1.2621*

Distributor availability ofPCLT-2AT4

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 953 1 Order Now
ARROW EUROPE 177 0 Order Now
MOUSER WORLDWIDE 906 1 Order Now
Farnell Element14 EUROPE 895 1 Order Now

Distributor reported inventory date: 2019-12-08

Distributor Name

DIGIKEY

Stock

953

Min.Order

1

Region

WORLDWIDE Order Now

ARROW

Stock

177

Min.Order

0

Region

EUROPE Order Now

MOUSER

Stock

906

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

895

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2019-12-08

Marketing Status

Active

Unit Price (US$)

1.2621

Quantity

100

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

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Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PCLT-2AT4
Active
HTSSOP14 Industrial Ecopack2
PCLT-2AT4-TR
Active
HTSSOP14 Industrial Ecopack2

PCLT-2AT4

Package:

HTSSOP14

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP14

Grade

Industrial

RoHS Compliance Grade

Ecopack2

PCLT-2AT4-TR

Package:

HTSSOP14

Material Declaration**:

PDF XML

Marketing Status

Active

Package

HTSSOP14

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

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