PCLT-2A Series

Dual current limited overvoltage protected digital termination

Catalog

Dual current limited overvoltage protected digital termination

Part	Applications	Supplier Device Package	Number of Circuits	Mounting Type	Package / Case	Technology	Embedded	Supplied Contents	Type	Function	Contents	Utilized IC / Part	Primary Attributes
STMicroelectronics PCLT-2AT4-TR	General Purpose	14-TSSOP	2	Surface Mount	14-TSSOP (0.173" 4.40mm Width) Exposed Pad	Mixed Technology
STMicroelectronics STEVAL-IFP004V1								Board(s)	Interface	Digital Signal Termination	Board(s)	PCLT2	Dual Input Over Current Protection Over Voltage

Catalog

Dual current limited overvoltage protected digital termination

Key Features

• 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)

• IEC 61000-4-2 ESD, Level 4

- In contact, ± 8 kV; in air, ± 15 kV

- Criteria B: temporary disruption

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).