Si8641x Datasheet – Quad Digital Isolator – IC
Quad-Channel Digital Isolator
Si8641x overview
The Si8641x is a Quad-Channel Digital Isolator made by Silicon Labs, supplied in these packages: QSOP-16, NB SOIC-16, WB SOIC-16 Type. The absolute maximum ratings table on this page lists the 10 limits from the manufacturer's datasheet that must not be exceeded. This page brings together the Si8641x pinout and maximum ratings, with the full datasheet PDF to preview below or download.
Silicon Lab's family of ultra-low-power digital isolators are CMOS devices offering substantial data rate, propagation delay, power, size, reliability, and external BOM advantages over legacy isolation technologies. The operating parameters of these products remain stable across wide temperature ranges and throughout device service life for ease of design and highly uniform performance. All device versions have Schmitt trigger inputs for high noise immunity and only require VDD bypass capacitors.
Data rates up to 150 Mbps are supported, and all devices achieve propagation delays of less than 10 ns. Enable inputs provide a single point control for enabling and disabling output drive. Ordering options include a choice of isolation ratings (1.0, 2.5, 3.75 and 5 kV) and a selectable fail-safe operating mode to control the default output state during power loss. All products >1 kV are safety certified by UL, CSA, VDE, and CQC, and products in wide-body packages support reinforced insulation withstanding up to 5 kVRMS.
Automotive Grade is available for certain part numbers. These products are built using automotive-specific flows at all steps in the manufacturing process to ensure the robust- ness and low defectivity required for automotive applications.
Datasheet
Si8641x features
- High-speed operation DC to 150 Mbps
- DC to 150 Mbps
- No start-up initialization required
- Wide Operating Supply Voltage 2.5–5.5 V
- 2.5–5.5 V
- Up to 5000 VRMS isolation
- Reinforced VDE 0884-10, 10 kV surge- capable (Si864xxT)
- 60-year life at rated working voltage
- High electromagnetic immunity
- Ultra low power (typical)
- 5 V Operation
- 1.6 mA per channel at 1 Mbps
- 5.5 mA per channel at 100 Mbps
- 2.5 V Operation
- 1.5 mA per channel at 1 Mbps
- 3.5 mA per channel at 100 Mbps
- Tri-state outputs with ENABLE
- Schmitt trigger inputs
- Selectable fail-safe mode Default high or low output (ordering option)
- Default high or low output (ordering option)
- Precise timing (typical)
- 10 ns propagation delay
- 1.5 ns pulse width distortion
- 0.5 ns channel-channel skew
- 2 ns propagation delay skew
- 5 ns minimum pulse width
- Transient Immunity 50 kV/µs
- AEC-Q100 qualification
- Wide temperature range –40 to 125 °C
- –40 to 125 °C
- RoHS-compliant packagesSOIC-16 wide bodySOIC-16 narrow body QSOP-16
- SOIC-16 wide body
- SOIC-16 narrow body
- QSOP-16
- Automotive-grade OPNs available
- AIAG compliant PPAP documentation support
- IMDS and CAMDS listing support
Si8641x pinout
| Name | Description |
|---|---|
| VDD1 | Side 1 power supply. |
| GND1 | Side 1 ground. |
| A1 | Side 1 digital input. |
| A2 | Side 1 digital input. |
| A3 | Side 1 digital input or output. |
| A4 | Side 1 digital input or output. |
| EN1/NC2 | Side 1 active high enable. NC on Si8640/45. |
| GND1 | Side 1 ground. |
| GND2 | Side 2 ground. |
| EN2/NC2 | Side 2 active high enable. NC on Si8645. |
| B4 | Side 2 digital input or output. |
| B3 | Side 2 digital input or output. |
| B2 | Side 2 digital output. |
| B1 | Side 2 digital output. |
| GND2 | Side 2 ground. |
| VDD2 | Side 2 power supply. |
Absolute maximum ratings
| Parameter | Symbol | Value | Unit |
|---|---|---|---|
| Storage Temperature 2 | TSTG | Min –65 / Max 150 | °C |
| Operating Temperature | TA | Min –40 / Max 125 | °C |
| Junction Temperature | TJ | Min — / Max 150 | °C |
| Supply Voltage | VDD1, VDD2 | Min –0.5 / Max 7.0 | V |
| Input Voltage | VI | Min –0.5 / Max VDD + 0.5 | V |
| Output Voltage | VO | Min –0.5 / Max VDD + 0.5 | V |
| Output Current Drive Channel | IO | Min — / Max 10 | mA |
| Lead Solder Temperature (10 s) | Min — / Max 260 | °C | |
| Maximum Isolation (Input to Output) (1 sec) NB SOIC-16, QSOP-16 | Min — / Max 4500 | VRMS | |
| Maximum Isolation (Input to Output) (1 sec) WB SOIC-16 | Min — / Max 6500 | VRMS |
Si8641x applications
- Industrial automation systems
- Medical electronics
- Isolated switch mode supplies
- Isolated ADC, DAC
- Motor control
- Power inverters
- Communications systems
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