High speed digital input current limiter
Description
SCLT3-8BQ7, SCLT3-8BT8
Datasheet
Octal industrial digital input current limiter with serialized output
QFN-48L 7.
0 x 7.
0 x 0.
9 mm HTSSOP-38 package
Product label
Product status link SCLT3-8BQ7, SCLT3-8BT8
Features
• Eight current-sinking digital inputs with serializer • Enables inputs to meet type 1, 2 and 3 characteristic of IEC 61131-2 standard • Adjustable and accurate input current limitation for low power and heat
dissipation: – 2.
35 mA typ for Type 1 and Type 3 • Integrated glitch and debounce filter with selectable delay time: 20 µs to 3 ms for EMC robustness • 35 V reverse polarity capable • SPI-Compatible Serial Interface 8-bit – Optional 16-bit mode with parity check, and diagnostics (temperature
alarm, voltage alarms) • Daisy-Chain SPI to reduce isolation channels • 5 V voltage regulator • Energyless Field-Side LED drivers for visual status indication • Operating ambient temperature range from -40 °C to 105 °C • Packages
– HTSSOP-38 – 500 µm pitch – QFN-48L – 500 µm pitch • Complies with the following standards: – IEC 61000-4-2 level 4: ±15 kV (air discharge) – IEC 61000-4-2 level 4: ±8 kV (contact discharge) – IEC 61000-4-5 Surge ±1 kV /42 Ω with minimum 1 kΩ pulse resistor at
field inputs
Applications
Where current limitation is required in factory automation applications: • Programmable logic controller • Input modules • CNC control • Motor control
Description
The SCLT3 series is an octal industrial digital input IC which drastically reduces the power dissipation of the digital input modules.
Its current-sinking inputs can be configured for Type 1, Type 2, or Type 3 inputs as per IEC 61131-2 with few external components.
The SCLT3 series includes a serial interface which translates, conditions and serializes the data to CMOS-compatible signals through SPI.
Combining its daisychaining capability with its accurate current limitation, the SCLT3 series enhances the I/O module’s density by cutting the power dissipation and reducing the number of optocoupl...
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