SN65HVD23D - 25Mbps Extended CM RS-485 | Texas Instruments
料号： SN65HVD23D ✓ 量产中SN65HVD23D 概述
An RS-485 transceiver is an interface IC that translates between a single-ended logic signal and a differential differential-mode bus. The SN65HVD23 belongs to the broader RS-485 transceiver hierarchy, which also includes RS-422-compatible devices and provides noise immunity suitable for industrial communication, data acquisition, inverter control, and other long-cable applications. Its differential signaling, extended common-mode tolerance, and failsafe behavior help the system distinguish the intended signal despite bus noise and ground offsets.
Key device characteristics include support for the TIA/EIA-485-A requirements identified in the manufacturer documentation, operation to 25 Mbps, a 5 V supply, and an extended operating-temperature range reaching 125°C. The HVD2x family also includes high ESD protection, wide receiver hysteresis, and failsafe operation. Wide receiver hysteresis reduces susceptibility to noise-induced state changes, while failsafe operation helps define the receiver output when the bus is idle or a driver is disconnected.
The SN65HVD23D is a half-duplex transceiver, so the driver and receiver share the bus connection and an external mechanism is generally required to control which device transmits. Its extended common-mode range is especially useful where the transmitter and receiver grounds may be separated by ground-loop voltage or where the transceiver is used with electrical power inverters. Designers must nevertheless maintain a common reference within the limits of the device and preserve the specified termination and biasing arrangements.
Typical uses include industrial inverter interfaces, factory automation equipment, building controls, data acquisition systems, and other multidrop RS-485 networks. At 25 Mbps, cable length, rise time, topology, and termination become increasingly important. Short, controlled-impedance connections are generally more suitable for maximum data rate than long unshielded cables, so the datasheet application information should guide network design.
A key design consideration is the bidirectional half-duplex implementation. Because the driver is not automatically disabled when the receiver is active, incorrect control can cause bus contention and elevated power dissipation. An external transceiver-enable circuit, GPIO, or suitable bus controller should provide deterministic direction control. Decoupling should be placed close to the supply pins, while the differential pair should be routed with consistent geometry and controlled return paths.
This page combines the verified manufacturer and distributor information, a conservative drop-in assessment, application guidance, and engineering-focused selection considerations. It also clearly identifies missing electrical details rather than estimating values that should be confirmed against the manufacturer datasheet before design release.
直接替换替代料： SN65HVD23D ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料SN65HVD23D 规格参数
| Device Type | RS-485 transceiver |
| Transceiver Configuration | 1 transmitter and 1 receiver |
| Communication Mode | Half-duplex |
| Supported Standards | TIA/EIA-485-A |
| Maximum Data Rate | 25 Mbps |
| 电源电压 | 5 V |
| 工作温度范围 | -55°C to +125°C |
| Package Type | 8-pin SOIC, MS-012AA |
| 引脚数 | 8 pins |
| Mounting Technology | Surface mount |
| Receiver Hysteresis | Wide receiver hysteresis |
| ESD Protection | High ESD protection |
| Failsafe Operation | Supported |
SN65HVD23D 8-pin soic, ms-012aa 引脚配置指南
SN65HVD23D（8-pin soic, ms-012aa 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： SN65HVD23D.
请参阅 数据手册 以查看完整引脚配置。
典型应用
SN65HVD23D 适用于 6 应用s: Industrial Power Inverter Interface, Factory Automation Communication Bus, Building Control and Sensor Network, Data Acquisition and Instrumentation, Long-Cable Communication, Industrial Gateway and Controller.
Industrial Power Inverter Interface
The SN65HVD23D fits inverter-control links that require a 25-Mbps RS-485 interface, a 5 V supply, and operation across -55°C to 125°C. Its extended common-mode range is valuable when the transceiver ground and inverter reference can move relative to one another. The device is placed between a controller UART and a twisted differential bus, with the bus direction controlled externally. Engineers should verify the inverter's ground-offset limits, surge environment, cable type, and termination before deployment.
推荐
Factory Automation Communication Bus
The SN65HVD23D supports factory automation nodes that combine a 25-Mbps transceiver rate with an extended common-mode operating range. A controller can use the half-duplex driver to send commands while the receiver detects bus responses, with an external enable signal preventing simultaneous transmission. The 8-pin SOIC package supports compact industrial controller layouts. Deployment planning should include bus topology, grounding, shielded-cable practices, and a baud-rate-versus-distance calculation based on the actual cable.
推荐
Building Control and Sensor Network
The SN65HVD23D is appropriate for controller nodes that need a high-speed RS-485 link over a building or industrial sensor network. Its -55°C to 125°C operating range supports uncontrolled enclosure locations, while wide receiver hysteresis and failsafe operation improve behavior in noisy environments. Install the device at a node boundary, use balanced cable routing, and provide a defined biasing and termination scheme. If the building includes substantial ground potential differences, assess whether galvanic isolation is required in addition to the transceiver's common-mode capability.
推荐
Data Acquisition and Instrumentation
The SN65HVD23D can connect a data-acquisition controller to distributed instruments over an RS-485 network while preserving a 25-Mbps communication ceiling. The extended common-mode range helps accommodate ground differences between instrumentation cabinets, and the wide receiver hysteresis improves noise rejection. The half-duplex architecture requires a defined enable strategy so that the driver is active only during transmission. Measurement engineers should evaluate the bus's common-mode and ground offsets, cable shielding, and grounding strategy before assuming that the transceiver alone resolves installation issues.
推荐
Long-Cable Communication
The SN65HVD23D is suited to long-cable RS-485 links because its HVD2x family provides extended common-mode operation, wide receiver hysteresis, and failsafe behavior. The device can be installed at remote nodes where the transceiver and controller grounds may not be perfectly equal. At up to 25 Mbps, however, the usable distance depends strongly on cable impedance, rise time, topology, termination, and interference. Engineers should use controlled-impedance cable, avoid unnecessary stubs, and validate the completed installation with representative cable lengths.
推荐
Industrial Gateway and Controller
The SN65HVD23D fits compact industrial gateways requiring a 25-Mbps half-duplex RS-485 port in an 8-pin SOIC package. The controller can route incoming UART data through the receiver and command transmissions through a GPIO-controlled driver enable. Its 5 V supply integrates readily with conventional controller power systems, while the -55°C to 125°C range supports industrial temperature requirements. Board-level implementation should include local supply decoupling, a controlled direction signal, an exposed bus connector with surge consideration, and careful routing of the differential pair.
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推荐产品汇总
工程参考数据： SN65HVD23D ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 8-pin SOIC, MS-012AA |
| Brand | Texas Instruments |
| Device Type | RS-485 transceiver |
| Transceiver Configuration | 1 transmitter and 1 receiver |
| Maximum Data Rate | 25 Mbps |
| Supply Voltage | 5 V |
| Operating Temperature | -55°C to +125°C |
| Communication Mode | Half-duplex |
| Special Features | High ESD protection, wide receiver hysteresis, failsafe operation |
关键差异点
- High-speed half-duplex RS-485 operation （对比 SN65HVD233D)
- Extended common-mode operation （对比 SN65HVD233D)
- Extended industrial temperature capability （对比 SN65HVD233D)
设计说明
Route the differential bus as a tightly coupled pair with continuous geometry and minimize stubs, vias, and discontinuities. Keep the transceiver, protection components, and connector path electrically short. The 25-Mbps capability makes rise-time control and reference-plane continuity important; verify the final PCB stack-up and connector transitions rather than relying only on logical net connectivity.
The SN65HVD23D is a half-duplex device, and its driver must not remain enabled while another node transmits. Implement an unambiguous enable policy in hardware or firmware, include fail-safe direction defaults, and avoid race conditions during resets. Bus contention can cause unpredictable data, excessive current, and device heating even when the receiver side of the transceiver is otherwise functioning correctly.
Place the supply bypass capacitor close to the transceiver's supply and ground connections, and follow the manufacturer layout and capacitance recommendations. Because the supplied verification data does not include quiescent current, supply-current limits, or logic thresholds, confirm those values in the datasheet when designing the 5-V rail. Ensure that protection-device leakage and bus loading do not create insufficient signal headroom.
Do not assume that the extended common-mode range eliminates the need for sound grounding or surge protection. Ground-potential differences, lightning exposure, and inductive coupling can exceed device limits. Use appropriately rated protection, controlled cable routing, and a system-level isolation strategy when necessary. The TIA/EIA-485-A compliance identified by the manufacturer does not by itself guarantee immunity to an unbounded installation environment.
合规信息
The supplied verification data identifies TIA/EIA-485-A support but does not explicitly provide current RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred.
