KPC6N138
Very high-speed photocoupler with 10Mbps data rate, 2500V isolation, and DIP-8 package for high-speed digital isolation.
Product Overview
Description
The KPC6N138 is a very high-speed photocoupler supporting data rates up to 10Mbps for demanding digital isolation applications.
Features enhanced CMTI performance and low propagation delay for reliable high-speed signal transmission.
Ideal for high-speed serial communications, industrial fieldbuses, and fast digital interfaces.
Product Series
KPC
Primary Application
High-speed serial comm
Key Features
- 10 Mbps very high speed
- 2500V isolation
- Very high CMTI 15kV/us
- Low propagation delay
- Open collector output
- Enhanced noise immunity
Specifications
| Output Type | Open Collector |
|---|---|
| Isolation Voltage | 2500Vrms |
| Data Rate | 10 Mbps max |
| Propagation Delay | 0.5us typical |
| CMTI | 15kV/us min |
| Forward Voltage | 1.4V typical |
| Forward Current | 20mA max |
| Package | DIP-8 |
| Operating Temperature | -40°C to +85°C |
Applications
High-speed serial comm
Electronic system design
Fieldbus interfaces
Communication and interface
Fast digital isolation
Electronic system design
Industrial networks
Industrial automation and control
Isolated gate drivers
Motor drive and control systems
FAE Expert Insights
"The KPC6N138 is my top pick for high-speed data communication isolation. With 10Mbps capability, it handles RS-485, CAN, and even lower-speed Ethernet isolation with ease. The integrated photodiode-amplifier design provides excellent signal integrity. In one automotive application, we used this for BMS communication isolation at 500kbps - worked perfectly through EMI testing. The key to success: keep the LED current stable at 10-15mA, and use good PCB layout practices with proper decoupling. The CMTI of 25kV/μs is exceptional for this price class. Highly recommended for any high-speed isolated communication."
Very high-speed 10Mbps photocoupler for demanding digital isolation
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What applications require 10Mbps photocouplers?
10Mbps photocouplers are needed for high-speed industrial fieldbuses (CAN, Profibus), fast SPI/I2C isolation, isolated Ethernet PHY interfaces, and high-speed digital links. Standard 1Mbps types are insufficient for these applications. The KPC6N138 provides the speed and CMTI needed for reliable operation.
Use 10Mbps for high-speed fieldbuses and fast digital links.
What is the maximum switching frequency of KPC6N138?
The KPC6N138 has a typical switching time of 2-4μs, allowing switching frequencies up to 50-100kHz depending on load conditions. For higher frequency applications, consider high-speed types like KPC series.
Suitable for general switching up to 50kHz.
Can KPC6N138 be used with 3.3V logic?
Yes, KPC6N138 can be used with 3.3V logic. Ensure proper current limiting resistor calculation: R = (3.3V - 1.2V) / If. For 10mA LED current, use approximately 200Ω resistor. Verify output current meets your load requirements based on CTR.
Use appropriate current limiting resistor for 3.3V operation.
What is the isolation resistance of KPC6N138?
The KPC6N138 provides typical isolation resistance of 10^12 ohms minimum. This high isolation resistance ensures excellent DC isolation between input and output circuits, critical for safety and noise immunity.
High isolation resistance ensures excellent DC isolation.
How do I protect KPC6N138 from ESD?
While KPC6N138 has internal ESD protection, for harsh environments: (1) Use proper grounding techniques; (2) Add external TVS diodes for additional protection; (3) Handle with ESD precautions during assembly; (4) Maintain proper PCB layout with adequate spacing.
Use standard ESD precautions during handling and assembly.