CLT3-4BT6
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器件描述：Current limited over-voltage protected quad digital termination
器件厂商：STMICROELECTRONICS [
STMicroelectronics]
厂商主页：http://www.st.com/
文件大小：191.62KB
文件页数：13
PDF阅读：CLT3-4BT6.pdf (点击阅读器件资料)
摘要：
November 2007 Rev 5 1/13
CLT3-4B
Current limited over-voltage protected quad digital termination
Features
■ 4 channel topology
■ Wide range input dc Voltage:
–V
I
= - 0.3 to 30 V with R
I
= 0
–V
I
= - 30 to 30 V with R
I
= 1.8 kΩ
– Low side configuration with common
ground
■ Current limiter:
–I
GEN
= 3 mA
– Input current limiter activation voltage < 5 V
– Temperature compensated operation
■ Opto-coupler drive:
– No coupler activation below 1.5 mA input
current
■ Input protection (R
I
= 1.2 kΩ):
– IEC 61000-4-2 electrostatic discharge
ESD, Class 3
In contact, ± 6 kV; in air, ± 8 kV
Level B: temporary disruption; no
change of opto-coupler state
– IEC 61000-4-5 voltage surge, Class 3
± 1000 V with 42 Ω serial resistor in
differential mode
Level B: temporary disruption
– IEC 61000-4-4 transient burst immunity
± 4 kV peak voltage; 5 kHz repetitive
rate
Level A: fully functional
■ Operating ambient temperature: - 25 to 85° C
Benefits
■ Reduced overall dissipation
■ Compact with high integration
■ Enables input to meet type 1 and 3
characteristic of IEC 61131-2 standard
■ Compatible operation with 2 and 3 wires
proximity sensor according EN60947-5-2
standard
■ Insensitive to the on state sensor impedance
■ Surface mount package for highly automated
assembly
■ Enhanced functional reliability
Applications
■ Industrial automation
■ Programmable logic controller
■ Communication field bus nodes
■ Peripheral input / output modules
■ Machine tool interface
Description
The CLT3-4 is a quadruple input digital
termination device designed for 24 V dc
automation applications. It provides the front-end
circuitry of a digital input module (I/O) in industrial
automation, and drives an isolating opto-coupler.
Figure 1. Pin configuration
TSSOP20
COM
IN
ESD12
IN2
VC
OUT1 OUT2
OUT4OUT3
COM34
COM
COM
COM12COM
COM
12345678910
11121314151617181920
COMESD34
IN3 IN4
ESDC
The pins ESD, COM
IJ
, COM (pins # 1, 3, 6, 8, 10, 11,
13, 15, 16, 18, 20) must be connected together
externally. This common pad COM is enlarged to
reduce the thermal resistance and improve the device
cooling. The COM and IN pins are designed to
minimize the EMI effects on the circuit.
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