ST714x 100Mbps 5kVrms Enhanced High-Speed Quad-Channel Digital Isolator

Overview

The ST714x is an enhanced high-speed quad-channel digital isolator providing complete electrical isolation between input and output. The logic input and output buffers of each isolated channel are separated by a double-capacitive silicon dioxide (SiO₂) insulation barrier, and the four fully independent data channels encode the input data and recover it without distortion at the receiving end. Within the series, the ST7140 has all four channels in the forward direction with an output enable on the output side, the ST7141 has three forward and one reverse channel, and the ST7142 has two forward and two reverse channels, both with output enables on each side for flexible multi-bus control; if input-side power or signal is lost, L-suffix devices default to a low output and H-suffix devices to a high output. Featuring high insulation capability, the ST714x delivers high electromagnetic immunity and low emissions at low power consumption, preventing noise and surges on data buses or other circuits from reaching the local ground and damaging sensitive circuits, while its high CMTI ensures correct digital signal transmission. The devices are offered in 16-pin wide-body SOW16 (-W) and 16-pin narrow-body SSOP16 (-S) packages over a -40~+125℃ operating range.

Features

• Signal transmission rate: 100Mbps
• Common-mode transient immunity (CMTI): ±100kV/μs (typical)
• Up to 5kVrms isolation withstand voltage, up to 13kV surge immunity
• Isolation barrier lifetime exceeding 50 years
• Wide supply voltage range: 2.5V to 5.5V, with 2.5V~5.5V level shifting
• 11ns typical propagation delay (5V supply), 3ns pulse-width distortion
• Output enable (EN) control, default output high (H) and low (L) options
• Operating temperature range: -40℃ to +125℃
• 16-pin wide SOW16 (-W) / 16-pin narrow SSOP16 (-S) packages

Typical Applications

• Industrial automation
• Motor control
• Solar inverters
• Isolated power supplies
• Medical equipment