SN75176BP - RS-422/RS-485 Transceiver | Texas Instruments
MPN： SN75176BP ✓ 啟用中SN75176BP 概覽
A differential bus transceiver is an interface IC that converts logic-level signals into balanced differential transmissions and receives those differential signals back into CMOS-compatible logic. RS-422 and RS-485 belong to the interface-transceiver hierarchy, where differential signaling improves noise immunity and allows communication over longer cable runs than ordinary single-ended logic. The SN75176BP combines those functions with three-state driver and receiver outputs for bus management.
The verified description states that the device meets the requirements of ANSI TIA/EIA-422-B and TIA/EIA-485-A and ITU Recommendations V.11 and X.27. Its differential bus outputs support multipoint transmission, while the receiver provides a logic-level output for the host controller. The three-state capability allows unused drivers or receivers to be disconnected when multiple nodes share the bus, although exact timing, current, voltage, and node-count details should be confirmed in the manufacturer datasheet before design release.
Typical uses include industrial RS-485 links, building automation, instrumentation, factory equipment, and other multidrop networks where long cables and electrically noisy environments are expected. The eight-pin PDIP package is useful for through-hole prototypes, legacy equipment, and serviceable industrial hardware. The device is identified as operating from 0°C to 70°C in the verified Texas Instruments part information; automotive or extended-temperature designs require a separately qualified part.
When laying out a board, keep the transceiver pins, connector, cable interface, and grounding arrangement consistent with the differential-bus topology. A transceiver replacement is only acceptable when its package, pin functions, supply requirements, logic levels, driver and receiver electrical limits, and bus-standard behavior have been verified. Do not infer those values from the family name alone. This page combines the verified manufacturer and distributor descriptions with explicit engineering limits where numerical source data was not supplied.
直接替換替代品，適用於 SN75176BP — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： SN75176BP （相同外形與佔位） — 差異在於 Package, Mounting Type, Product Type, Communication Mode, Driver Output.
MAX485EPA+
✅ 直接替換聯絡詢價
查看資料表 →DS75176BN
✅ 直接替換📋 參考替代品（不在目錄中）
SN75176BD
✅ 直接替換聯絡詢價
查看資料表 →MAX485EPA
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN75176BN
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
SN75176BP 規格
| Product Type | Differential bus transceiver |
| Supported Standards | ANSI TIA/EIA-422-B, ANSI TIA/EIA-485-A, ITU V.11, ITU X.27 |
| Transceiver Configuration | 1 transmitter and 1 receiver |
| Bus Modes | RS-422 and RS-485 |
| Bus Topology | Multipoint transmission |
| Driver Output | Three-state driver |
| Receiver Output | Three-state receiver |
| 工作溫度範圍 | 0°C to 70°C |
| 封裝 | 8-pin PDIP (P) |
| 安裝類型 | Through-hole |
SN75176BP 腳位配置
| 腳位 1 | RO — Receiver output |
| 腳位 2 | RE — Receiver enable input |
| 腳位 3 | DE — Driver enable input |
| 腳位 4 | DI — Driver input |
| 腳位 5 | GND — Ground |
| 腳位 6 | A — Noninverting differential bus terminal |
| 腳位 7 | B — Inverting differential bus terminal |
| 腳位 8 | VCC — Positive supply connection |
典型應用
SN75176BP 適用於 6 應用s: Industrial RS-485 Control Networks, Building Automation and HVAC Networks, Instrumentation and Sensor Buses, Long-Distance Data Transmission, Legacy Through-Hole Control Boards, Point-to-Point RS-422 Links.
Industrial RS-485 Control Networks
The SN75176BP fits industrial control networks that connect a controller to remote equipment over balanced differential wiring. Its verified RS-485 capability, multipoint-transmission design, and long-bus-line focus suit factory machinery, process equipment, and building-control nodes where single-ended logic would be more susceptible to interference. Use the driver and receiver controls to prevent multiple transmitters from driving the bus simultaneously. The supplied data does not specify maximum data rate, node count, cable length, or termination values, so those limits must be taken from the manufacturer datasheet before deployment.
推薦
Building Automation and HVAC Networks
The SN75176BP can provide the physical interface between a building controller and RS-485-connected HVAC, sensor, or access equipment. Differential signaling helps preserve data integrity across building wiring where motors, relays, and fluorescent equipment may create electrical noise. The device’s verified three-state driver and receiver capability supports shared-bus coordination, while the 0°C to 70°C rating is appropriate for many indoor environments. Verify local voltage, grounding, surge protection, and cable routing requirements before installation.
推薦
Instrumentation and Sensor Buses
The SN75176BP is suitable for differential sensor and instrumentation links that require reliable communication over conductors running between equipment locations. The transmitter converts a logic input into balanced bus signaling, and the receiver converts the differential bus state back into a logic output for measurement or control electronics. The verified support for multipoint transmission allows multiple compatible nodes to share the bus when node count, biasing, and termination are designed correctly. The supplied data does not provide input thresholds or common-mode limits, so verify those values directly.
推薦
Long-Distance Data Transmission
The SN75176BP’s verified long-bus-line and noisy-environment positioning makes it relevant to industrial systems that extend beyond short board-level communication distances. Differential signaling reduces the effect of common-mode noise when the cable, grounding, termination, and transceiver common-mode limits are properly designed. The component is a basic RS-422/RS-485 physical-layer transceiver rather than a complete protocol controller, so a UART or network controller must generate and interpret the data. Exact maximum distance is [DATA_NEEDED: maximum bus length].
推薦
Legacy Through-Hole Control Boards
The 8-pin PDIP package makes SN75176BP appropriate for legacy through-hole control boards, prototype hardware, and repair assemblies that already use this footprint. Its through-hole format also allows inspection and rework in serviceable equipment. Designers should preserve the numbered pin assignment for DE, RE, RO, DI, A, B, GND, and VCC and should not assume that every electrically similar 8-pin transceiver has identical enable polarity or fault behavior. Confirm the latest manufacturer datasheet before modifying an existing board.
推薦
Point-to-Point RS-422 Links
The SN75176BP can be used in RS-422 point-to-point arrangements where a differential driver communicates with a differential receiver across a balanced cable. Its verified support for ANSI TIA/EIA-422-B and ITU V.11 positions it for conventional differential data links, while the same device also covers RS-485 requirements. In a point-to-point circuit, termination and biasing still depend on the cable and topology. The supplied excerpts do not provide propagation delay, receiver thresholds, or maximum data rate, so these must be checked before choosing a baud rate.
推薦
推薦產品摘要
工程參考資料，適用於 SN75176BP — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX485EPA+ | DS75176BN | SN75176BD | MAX485EPA | SN75176BN |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Maxim Integrated | Texas Instruments | Texas Instruments | Maxim Integrated | Texas Instruments |
主要差異化特點
- Verified support for both RS-422 and RS-485 in one transceiver (對比MAX485EPA+)
- Verified multipoint and long-bus-line positioning (對比DS75176BN)
- Commercial-temperature identity is explicitly identified (對比MAX485EPA)
設計說明
Keep the transceiver and its bus connector physically close so that the differential traces from A and B remain short before transitioning to the cable. Route A and B as a pair with consistent spacing and controlled impedance where the design rules require it. Avoid routing the pair through noisy switching-power regions, and verify the connector pin order against the board schematic because reversed A/B polarity can prevent reliable reception.
Do not enable multiple bus transmitters at the same time. Coordinate DE and RE in the controller firmware or hardware so that only one node drives the differential bus while other nodes remain in receive mode. The verified three-state capability is intended for bus management, but it does not protect a design from firmware races or incorrect enable polarity. Add test points for the bus and control pins to diagnose contention during integration.
Design termination and biasing from the actual cable topology, data rate, and node count rather than copying a generic value. The supplied verified material does not include the SN75176BP maximum data rate, maximum cable length, receiver thresholds, or common-mode limits, so those values are explicitly unknown here. Use the current manufacturer datasheet to select series damping, fail-safe biasing, isolation protection, and grounding arrangements.
合規資訊
The supplied verified excerpts identify the manufacturer, device function, standards, package, and operating temperature, but do not provide explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is treated as not applicable because no automotive qualification is stated and the verified operating range is 0°C to 70°C.
