EL063X Series 8-Pin SOP Package Dual-Channel High-Speed 10Mbit/s Logic Gate Optocoupler Datasheet - Technical Documentation

1. Product Overview

The EL063X series is a class of dual-channel high-speed logic gate optocouplers (optical isolators). These devices are designed to provide robust electrical isolation and high-speed digital signal transmission between two circuits. Their core function is to transmit logic-level signals across an isolation barrier through optical coupling between an infrared light-emitting diode (LED) and a high-speed integrated photodetector with logic gate output. This design effectively eliminates ground loops, prevents noise transmission, and protects sensitive circuits from voltage spikes or ground potential differences.

The primary application areas for this component include industrial automation, communication interfaces, power supply control, and computer peripherals, where reliable, noise-immune signal transmission is critical. The dual-channel configuration within a single package offers space-saving advantages for differential signal applications or multi-channel control line isolation and ensures consistency in channel characteristics.

2. Detailed Technical Parameters

Electrical and optical parameters define the operating boundaries and performance of the optocoupler.

2.1 Absolute Maximum Ratings

These are stress limits that must not be exceeded under any conditions, even momentarily. Operating beyond these ratings may cause permanent damage to the device.

• Input Forward Current (I_F)): 20 mA DC/average. This limits the maximum current through the input LED.
• Input reverse voltage (V_R)): 5 V. The maximum reverse bias voltage that the input LED can withstand.
• Output current (I_O)): 50 mA. The maximum current that the output transistor can sink.
• Output voltage (V_O) with power supply voltage (V_CC)): 7.0 V. The maximum voltage that can be applied to the output side pins.
• Isolation voltage (V_ISO)）：3750 V_{Effective value}, lasting for 1 minute. This is a critical safety parameter indicating the dielectric strength of the isolation barrier between the input and output sides. During the test, pins 1-4 are shorted together, and pins 5-8 are shorted together.
• Operating Temperature (T_OPR)): -40°C to +100°C. The ambient temperature range within which the device is guaranteed to operate normally.
• Storage Temperature (T_STG)):-55°C to +125°C.

2.2 Electrical Characteristics

These parameters are guaranteed under the specified operating conditions (unless otherwise noted, Ta = -40°C to 85°C).

2.2.1 Input Characteristics

• Forward voltage (V_F)): Typical value 1.4V, maximum 1.8V at I_F= 10 mA. Used to calculate the series resistor required for the input LED drive circuit.
• V_FTemperature coefficient: Approximately -1.8 mV/°C. LED forward voltage decreases as temperature increases.
• Input capacitance (C_IN)): Typical value 60 pF. This parasitic capacitance affects the high-frequency performance on the input side.

2.2.2 Output and Transmission Characteristics

• Power supply current (I_CCH/I_CCL)): Output IC static current consumption. I_CCH(Output high level) Typical value is 13 mA (maximum 18 mA). At V_CCL= 5.5V时，I_CC(Output low level) Typical value is 15 mA (max 21 mA). This is important for power budget calculation.
• High-level output current (I_OH)): When the output maintains a high logic level (V_Oclose to V_CC), it can provide a maximum current of 100 µA. This is a relatively weak current sourcing capability.
• Low-level output voltage (V_OL)): in I_F= 5mA and I_CL= 13mA, maximum 0.6V. This defines the voltage level when the output transistor actively sinks current, ensuring compatibility with TTL/CMOS logic low-level thresholds.
• Input threshold current (I_FT)): Maximum 5 mA. This is the input current required to guarantee the output switches to a valid low-level state (V_O≤ 0.6V) under specified conditions. Designers must ensure the driving circuit provides at least this current to achieve reliable switching.

2.3 Switching Characteristics

These parameters define high-speed digital performance, measured under standard test conditions (Ta=25°C, V_CC=5V, I_F=7.5mA, C_L=15pF, R_L=350Ω).

• Propagation delay (t_PHL, t_PLH)): Each maximum 100 ns. t_PHLis the delay from the input LED turning on (current rising) to the output falling. t_PLHIt is the delay from the input LED turning off (current falling) to the output rising. These delays limit the maximum data rate.
• Pulse Width Distortion (|t_PHL– t_PLH|): Maximum 35 ns. This asymmetry between the rise and fall delays distorts the duty cycle of the transmitted pulse, which is critical in timing-sensitive applications.
• Output rise/fall time (t_r, t_f)): t_rTypical value is 40 ns (10% to 90%), t_fTypical value is 10 ns (90% to 10%). A faster fall time is characteristic of the active pull-down output stage.
• Common-Mode Transient Immunity (CMTI): This is a key parameter for noise immunity in noisy environments such as motor drives or switching power supplies. It measures the device's ability to suppress fast voltage transients appearing across the isolation barrier.
  • EL0630: Minimum 5000 V/µs.
  • EL0631: Minimum 10000 V/µs. The higher CMTI makes the EL0631 suitable for applications with more severe electrical noise.
  • This suppression capability is for the output high level (CM_H) and the output low level (CM_LThe states are all specified to ensure that the output does not falsely trigger during transient events.

3. Performance Curve Analysis

Although the provided PDF excerpt mentions "typical photoelectric characteristic curves," the specific charts are not included in the text. Typically, such curves for optocouplers include:

• Current Transfer Ratio (CTR) versus Forward Current (I_F)Relationship: Shows the efficiency of optocoupler (output current / input current) under different drive levels.
• Propagation Delay versus Forward Current (I_F)Relationship: Illustrates how switching speed varies with LED drive current. Higher I_Fgenerally reduces propagation delay.
• Relationship between propagation delay and temperature: Shows the temperature dependence of switching speed.Relationship between output saturation voltage and output current: Characterizes the performance of the output transistor when sinking current.
• Designers should consult the complete datasheet containing graphs to understand these relationships and optimize their specific application, such as making trade-offs between speed and LED current/power consumption.4. Mechanical and Packaging Information

The device employs a standard 8-pin small outline package (SOP or SOIC). This surface-mount package conforms to the common SO8 package dimensions, facilitating PCB layout and assembly.

4.1 Pin Configuration

The pin configuration is as follows:

Pin 1: Anode (Channel 1 input LED)

Pin 2: Cathode (Channel 1 input LED)

• Pin 3: Cathode (Channel 2 Input LED)
• Pin 4: Anode (Channel 2 Input LED)
• Pin 5: Ground (GND) - Output Side Common Terminal.
• Pin 6: V
• 2 (Channel 2 output)
• Pin 7: V_OUT1 (Channel 1 Output)
• Pin 8: V_OUT(Output side power supply voltage, typical value +5V)
• Important Note:_CCInput and output sides are fully isolated. Pins 1-4 are on the isolated input side, and pins 5-8 are on the isolated output side. PCB layout must maintain sufficient creepage distance and electrical clearance between the two sets of pins and their associated traces to maintain the isolation rating.

5. Welding and Assembly GuideThe device is suitable for standard surface-mount assembly processes.

Soldering temperature: The maximum allowable soldering temperature is 260°C for 10 seconds. This is compatible with typical lead-free reflow soldering temperature profiles.

Moisture Sensitivity: Although not explicitly stated in the excerpt, most plastic-encapsulated SMD devices have a Moisture Sensitivity Level (MSL). To prevent "popcorn" phenomenon during reflow soldering, proper handling, baking (if required), and storage according to the manufacturer's guidelines are essential.

• Output bypass: A critical design note (*3) specifies that VThe power supply pin (8) must be bypassed with a 0.1 µF or larger capacitor (ceramic or solid tantalum with good high-frequency characteristics). This capacitor must be placed as close as possible to pin 8 (V
• ) and pin 5 (GND) to ensure stable operation and minimize switching noise on the supply rail.6. Application Recommendations
• 6.1 Typical Application CircuitThe datasheet lists several key applications:_CCGround Loop Elimination: Primary function, isolating the grounds of two subsystems to prevent circulating currents and noise._CCLogic Level Conversion/Interface: Can interface between different logic families (e.g., from LSTTL to TTL or 5V CMOS) while providing isolation.

Data Transmission and Line Receivers: Suitable for isolated serial data links (e.g., RS-232, RS-485 isolation), digital I/O isolation, and multiplexing.

Switched-mode power supply feedback: In flyback or other isolated converter topologies, isolates the feedback signal from the secondary (output) side to the primary (controller) side.

Pulse transformer replacement: Provides a solid-state, potentially more reliable and compact alternative for transmitting digital pulses across an isolation barrier.

• Computer peripheral device interface: Isolate signals between printers, industrial I/O cards, or other peripheral devices.6.2 Design Considerations
• Input drive circuit: Must be based on the input power supply voltage (V), required forward current I
• and V of the LEDto calculate the series resistor. R
• Series= (V
• - V) / I
• . To ensure reliable switching, Imust be ≥ I

, and can be increased to the absolute maximum rating to improve speed, at the cost of higher power consumption.

• Output load: The output is designed to drive standard logic loads. Pull-up resistor R(connected between V_INand the output pin) sets the logic high level and rise time. A smaller R_Fprovides a faster rise time but increases power consumption when the output is low. Test conditions use R_F=350Ω._{Power consumption: Calculate input side (P}= V_IN* I_F) and the total power consumption on the output side, ensuring it remains within the specified limits, especially under high-temperature conditions._FChannel Selection: For applications requiring higher common-mode noise immunity (CMTI ≥ 10,000 V/µs compared to 5,000 V/µs), choose EL0631 instead of EL0630._F7. Technical Comparison and Differentiation_FTThe EL063X series stands out in the market through the following key features:
• High Speed: With a capability of 10 Mbit/s and a propagation delay of ≤100 ns, it belongs to the high-speed optocoupler category, suitable for fast digital communication.SOP-8 Package Dual Channel: Integrates two isolated channels in a compact standard package, saving board space compared to two single-channel devices._LHigh CMTI: Particularly the minimum 10 kV/µs CMTI of the EL0631 offers significant advantages in electrically noisy environments like industrial motor drives, where optocouplers with low CMTI may fail._CCWide Temperature Range: Guaranteed performance from -40°C to 85°C, with an operating range up to 100°C, suitable for industrial and automotive applications._LComprehensive Safety Approvals: The device is certified by major international safety agencies (UL, cUL, VDE, SEMKO, etc.), which is often a mandatory requirement for end products in regulated markets._LEnvironmental Compliance: Halogen-free (Br/Cl restrictions), lead-free, compliant with RoHS and REACH standards, meeting modern environmental regulations.
• 8. Frequently Asked Questions (Based on Technical Parameters)Q: What is the maximum data rate achievable using this optocoupler?_DA: The specification of 10 Mbit/s and a maximum propagation delay of 100 ns suggest a maximum theoretical data rate of approximately 5-10 Mbps for NRZ data. In practice, the achievable rate depends on specific waveforms, rise/fall times, and pulse width distortion. For reliable operation, a conservative design target is typically 1-5 Mbps._FQ: How to choose between EL0630 and EL0631?_FA: The main difference lies in the Common-Mode Transient Immunity (CMTI). If your application involves significant switching noise (e.g., near motor drivers, high-power inverters, noisy power supplies), the EL0631 (10 kV/µs) offers superior noise immunity. For less noisy environments, the EL0630 (5 kV/µs) may be sufficient.
• Q: Why does Vrequire a bypass capacitor?

A: The high-speed switching of the output stage can cause noise on the V

line. The local bypass capacitor provides a low-impedance source for this current, preventing the V

• from experiencing voltage droops or spikes, which could otherwise lead to operational instability or noise radiation. Placing it close to the pin is crucial for effectiveness.Q: Can I use this device to isolate analog signals?
• A: No. This is alogic gate
• optocoupler. The output is a digital logic level (high or low), not a linear representation of the input current. For analog isolation, a linear optocoupler (with a phototransistor or photodiode output) is required.Q: What is the purpose of the "triggerable output" mentioned in the description?
• A: Although not detailed in this excerpt, a triggerable output typically means the output stage has an enable or trigger control. This allows the output to be turned on/off or latched via a third control signal, which is useful in multiplexing applications or for reducing power consumption. The pin configuration here does not show a separate trigger pin, so this function may be internally integrated in a specific mode, or it may refer to the output being enabled by the input signal itself.9. Working Principle
• The operating principle is based on photoelectric conversion. When sufficient forward current (I) is applied to the input infrared light-emitting diode (IRED), it emits photons. These photons pass through a transparent isolation barrier (typically a molded plastic compound). On the output side, a high-speed silicon photodetector integrated circuit receives this light. This IC contains a photodiode that converts the light back into a photocurrent. This photocurrent is then processed by internal amplifier and comparator circuits ("logic gates") to produce a clean, well-defined digital output voltage. When the input LED is on, the output is driven to a logic low state (typically via an active pull-down transistor). When the input LED is off, the output circuit pulls the pin to a logic high state (via an external pull-up resistor R
• ). This positive logic operation is summarized in the provided truth table as: input high = output low, input low = output high.10. Industry Trends and Background

The development of optocouplers such as the EL063X series is driven by several key trends in the field of electronics:

Demand for higher speed and bandwidth: With the increasing speed of industrial networks (EtherCAT, PROFINET IRT) and communication interfaces, isolators must keep pace. The trend from kilobits to megabits, and now to 10+ megabit speeds is evident.
Enhanced noise immunity: The growing electrical complexity of industrial and automotive environments requires isolators with higher CMTI ratings to ensure reliable operation amidst noise generated by motor drives, switching power supplies, and RF sources.

Miniaturization and integration: The dual-channel design in SOP-8 packages reflects the need to save PCB space and reduce component count. Further trends include integrating more channels (quad-channel isolators) or combining isolation with other functions (such as ADC drivers or I
C level shifting).

Higher Safety and Reliability Standards: Stricter safety regulations across industries are driving demand for components with higher isolation voltages, longer operational lifetimes, and robust certifications from bodies like UL, VDE, and CQC._CC?
Alternative Isolation Technologies: While optocoupler technology is mature, they face competition from capacitive isolators (using SiO_CCbarriers) and magnetic isolators (giant magnetoresistance or transformer-based), which may offer advantages in speed, power consumption, and integration density. However, optocouplers maintain a solid position due to their high CMTI, simplicity, and well-understood reliability._CCEL063X series, with its balance of speed, dual-channel integration, high CMTI, and safety certifications, is designed to meet the market's ongoing demand for robust, high-performance signal isolation.

Q: Can I use this device to isolate analog signals?
A: No. This is alogic gatephotocoupler. The output is a digital logic level (high or low), not a linear representation of the input current. For analog isolation, a linear optocoupler (with a phototransistor or photodiode output) is required.

Q: What is the purpose of the "strobable output" mentioned in the description?
A> While not detailed in this excerpt, a strobable output typically means the output stage has an enable or strobe control. This allows the output to be turned on/off or latched by a third control signal, which can be useful for multiplexing applications or reducing power consumption. The pin configuration here does not show a separate strobe pin, so this functionality may be integrated internally in a specific mode or may refer to the output being enabled by the input signal itself.

. Operational Principle

The operational principle is based on optoelectronic conversion. When a sufficient forward current (I_F) is applied to the input Infrared Emitting Diode (IRED), it emits light photons. These photons traverse the transparent isolation barrier (typically a molded plastic compound). On the output side, a high-speed silicon photodetector integrated circuit receives this light. This IC contains a photodiode that converts the light back into a photocurrent. This photocurrent is then processed by an internal amplifier and comparator circuit (the "logic gate") to produce a clean, well-defined digital output voltage. When the input LED is ON, the output is driven to a logic LOW state (typically by an active pull-down transistor). When the input LED is OFF, the output circuit pulls the pin to a logic HIGH state (through the external pull-up resistor R_L). This positive logic operation is summarized in the provided Truth Table: Input High = Output Low, Input Low = Output High.

. Industry Trends & Context

The development of photocouplers like the EL063X series is driven by several key trends in electronics:

• Demand for Higher Speed and Bandwidth: As industrial networks (EtherCAT, PROFINET IRT) and communication interfaces speed up, isolators must keep pace. The move from kilobit to megabit and now towards 10+ megabit speeds is evident.
• Increased Noise ImmunityIndustrial and automotive environments are becoming more electrically complex, necessitating isolators with higher CMTI ratings to ensure reliable operation amidst noise from motor drives, switching power supplies, and RF sources.
• Miniaturization and IntegrationThe dual-channel design in an SOP-8 package reflects the need to save PCB real estate and reduce component count. Further trends include integrating more channels (quad isolators) or combining isolation with other functions like ADC drivers or I²C level translation.
• Enhanced Safety and Reliability StandardsStricter safety regulations across industries push for components with higher isolation voltages, longer operational lifetimes, and robust certifications from agencies like UL, VDE, and CQC.
• Alternative Isolation TechnologiesWhile optocouplers are mature, they face competition from capacitive isolators (using SiO₂barriers) and magnetic (giant magnetoresistance or transformer-based) isolators, which can offer advantages in speed, power consumption, and integration density. However, optocouplers maintain strong positions due to their high CMTI, simplicity, and well-understood reliability.

The EL063X series, with its balance of speed, dual-channel integration, high CMTI, and safety certifications, is positioned to address these ongoing demands in the market for robust, high-performance signal isolation.