PCLT-2A

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Dual current limited overvoltage protected digital termination

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Product overview

Description

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).
  • All 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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STMicroelectronics - PCLT-2A

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Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
PCLT-2AT4
Active
TSSOP-14 Industrial Ecopack2
PCLT-2AT4-TR
Active
TSSOP-14 Industrial Ecopack2

PCLT-2AT4

Package:

TSSOP-14

Material Declaration**:

Marketing Status

Active

Package

TSSOP-14

Grade

Industrial

RoHS Compliance Grade

Ecopack2

PCLT-2AT4-TR

Package:

TSSOP-14

Material Declaration**:

Marketing Status

Active

Package

TSSOP-14

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.

Sample & Buy

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Part Number
Order from distributors
Order from ST
Marketing Status
Package
Packing Type
Temperature (°C) ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
PCLT-2AT4-TR No availability of distributors reported, please contact our sales office
Active
TSSOP-14 Tape and Reel - - EAR99 PHILIPPINES
PCLT-2AT4 No availability of distributors reported, please contact our sales office
Active
TSSOP-14 Tube - - EAR99 PHILIPPINES

PCLT-2AT4-TR Active

Package:
TSSOP-14
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

PCLT-2AT4-TR

Packing Type:

Tape and Reel

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

No availability of distributors reported, please contact our sales office

PCLT-2AT4 Active

Package:
TSSOP-14
ECCN (US):
EAR99
Budgetary Price (US$)*/Qty:
-

Part Number:

PCLT-2AT4

Packing Type:

Tube

Operating Temperature (°C)

Min:

-

Max:

-

Country of Origin:

PHILIPPINES

No availability of distributors reported, please contact our sales office
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(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors