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功能与比较器件相同且具有相同引脚。
ISO7420M
- Highest Signaling Rate: 1 Mbps
- Low Power Consumption, Typical ICC per Channel (3.3-V operation):
- ISO7420: 1.1 mA, ISO7421: 1.5 mA
- Low Propagation Delay – 9 ns Typical
- Low Skew – 300 ps Typical
- Wide TA Range: –40°C to 125°C (M-Grade)
- 50-kV/μs Transient Immunity, Typical
- Over 25-Year Isolation Integrity at Rated Voltage
- Operates From 3.3-V and 5-V Supply and Logic Levels
- 3.3-V and 5-V Level Translation
- Narrow Body SOIC-8 Package
- Safety and Regulatory Approvals:
- 4242 VPK Isolation per DIN V VDE V 0884-10 and DIN EN 61010-1
- 2500 VRMS Isolation for 1 minute per UL 1577
- CSA Component Acceptance Notice 5A, IEC 60950-1 and IEC 61010-1 Standards
- CQC Certification per GB4943.1-2011
All other trademarks are the property of their respective owners
The ISO7420, ISO7420M and ISO7421 provide galvanic isolation up to 2500 VRMS for 1 minute per UL. These digital isolators have two isolated channels. Each isolation channel has a logic input and output buffer separated by a silicon dioxide (SiO2) insulation barrier. Used in conjunction with isolated power supplies, these devices prevent noise currents on a data bus or other circuit from entering the local ground and interfering with or damaging sensitive circuitry. The suffix M indicates wide temperature range (–40°C to 125°C).
These devices have TTL input thresholds and require two supply voltages, 3.3 or 5 V, or any combination. All inputs are 5-V tolerant when supplied from a 3.3-V supply.
Note: The ISO7420 and ISO7421 are specified for signaling rates up to 1 Mbps. Due to their fast response time, under most cases, these devices will also transmit data with much shorter pulse widths. Designers should add external filtering to remove spurious signals with input pulse duration <20 ns if desired.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | ISO742x Low-Power Dual-Channel Digital Isolators 数据表 (Rev. I) | PDF | HTML | 2015-7-16 | ||
| 证书 | VDE Certificate for Basic Isolation for DIN EN IEC 60747-17 (Rev. AA) | 2026-6-11 | ||||
| 白皮书 | 通过使用数字隔离器替代光耦合器改善系统性能 (Rev. D) | PDF | HTML | 英语版 (Rev.D) | PDF | HTML | 2025-11-13 | |
| 证书 | CQC Certificate for ISO154xD, ISO742xD, ISO71xxDBQ (Rev. B) | 2025-8-19 | ||||
| 证书 | CSA Certificate for ISO742xD | 2023-3-15 | ||||
| 证书 | UL Certificate of Compliance File E181974 Vol 4 Sec 3 | 2022-8-8 | ||||
| 白皮书 | Why are Digital Isolators Certified to Meet Electrical Equipment Standards? | 2021-11-16 | ||||
| 白皮书 | 绝缘穿透距离：数字隔离器如何满足认证要求 | 英语版 | PDF | HTML | 2021-9-27 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
DIGI-ISO-EVM — 通用数字隔离器评估模块
DIGI-ISO-EVM 是一个评估模块 (EVM)，用于评估 TI 采用以下五种不同封装的任何单通道、双通道、三通道、四通道或六通道数字隔离器器件：8 引脚窄体 SOIC (D)、8 引脚宽体 SOIC (DWV)、16 引脚宽体 SOIC (DW)、16 引脚超宽体 SOIC (DWW) 和 16 引脚 QSOP (DBQ) 封装。此 EVM 具有足够的 Berg 引脚选项，支持使用超少的外部元件来评估相应器件。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SOIC (D) | 8 | Ultra Librarian |