L9678TR-S - User-Configurable Airbag IC | STMicroelectronics
料号： L9678TR-S ✓ 量产中L9678TR-S 概述
An airbag interface IC is a specialized form of automotive power-management and interface semiconductor. It sits between a vehicle's restraint-control electronics and the airbag deployment circuits, helping translate control commands into protected deployment actions while coordinating fault detection, safing, and diagnostic functions. Within the product hierarchy, the L9678TR-S is a dedicated airbag IC, a specialized interface IC, an automotive analog and power IC, and ultimately a semiconductor.
The principal verified characteristics are its user-configurable airbag functionality, 64-pin LQFP construction, automotive AEC-Q100 series association, and availability in a tray package. Its 64-pin package provides the mixed-signal and power connections required for a complex automotive restraint interface. Exact electrical ratings, internal-channel counts, diagnostic coverage, timing limits, and protection thresholds were not included in the supplied search extract and therefore must be confirmed against the manufacturer datasheet before schematic capture or safety validation.
The L9678TR-S is based on the STMicroelectronics L9678 user-configurable airbag IC family documented in the manufacturer datasheet identified as DocID025869 Rev 3. The related L9678P family provides a pin-compatible product option referenced by STMicroelectronics, with dedicated supply arrangements and an optional 7.2 V linear-regulation path described for the related device. Designers should not transfer those L9678P-specific details to L9678TR-S without checking the applicable datasheet.
Typical uses include automotive airbag control units, seat-belt pretensioner controllers, vehicle occupant-restraint modules, frontal-impact sensing systems, and side-impact restraint controllers. The part is most appropriate when an OEM or Tier 1 requires an automotive-qualified, configurable deployment interface rather than a generic logic or power component.
For a new design, validate every external resistor, capacitor, squib-driver interface, diagnostic threshold, and fault-response setting against the released STMicroelectronics datasheet. PCB placement must preserve the package's thermal and high-current land pattern, while production programming and end-of-line test should follow STMicroelectronics' documented configuration procedure.
This product page combines verified package, function, lifecycle, automotive-qualification, pricing, and source information with explicit data-gap markers and same-brand pin-compatible alternatives. It adds practical sourcing and design context without inventing unpublished electrical limits or safety-performance claims.
直接替换替代料： L9678TR-S ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L9678TR-S （相同外形与封装尺寸） ——差异在于 Product Type, Package, AEC-Q100 Qualification, Functional Safety.
L9678PTR
✅ 直接替换联系询价
查看数据手册 →L9678P-S
✅ 直接替换联系询价
查看数据手册 →L9678P
✅ 直接替换联系询价
查看数据手册 →L9678TR-S 规格参数
| Product Type | User-configurable airbag interface IC |
| Device Family | L9678 |
| Application | Automotive occupant-restraint and airbag control systems |
| Automotive Qualification Series | AEC-Q100 series |
| 引脚数量 | 64 pins |
| Package Type | 64-pin LQFP |
| 安装类型 | Surface mount |
| Shipping Format | Tray |
| Production Status | In full production |
| Datasheet Revision | DocID025869 Rev 3 |
| Datasheet Publication Date | 2014-02-19 |
| Datasheet File Size | 2890 kB |
| Verified Unit Price | $2.0553 as of 2026-10-30 |
L9678TR-S 64-pin lqfp 引脚配置指南
L9678TR-S（64-pin lqfp 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： L9678TR-S.
请参阅 数据手册 以查看完整引脚配置。
典型应用
L9678TR-S 适用于 6 应用s: Automotive Airbag Control Unit, Seat-Belt Pretensioner Controller, Frontal-Impact Restraint Controller, Side-Impact Restraint Module, Vehicle Restraint Diagnostic System, Protected Automotive Squib Interface.
Automotive Airbag Control Unit
The L9678TR-S fits an airbag control unit because it is specifically identified as a user-configurable airbag IC and is associated with the AEC-Q100 automotive qualification series. Its 64-pin LQFP interface provides the physical pin count expected for a complex restraint controller combining deployment control, monitoring, and diagnostic connections. The device should be positioned between the restraint-control logic and the protected squib-driver circuitry. Before schematic release, engineers must confirm the exact output configuration, supply limits, fault behavior, and programming procedure in DocID025869 Rev 3; the supplied extract does not establish those electrical thresholds.
推荐
Seat-Belt Pretensioner Controller
The L9678TR-S can support a seat-belt pretensioner controller when that module requires the specialized deployment, safing, and diagnostic behavior associated with the L9678 family. Its user-configurable architecture allows the automotive OEM to align device configuration with the restraint strategy, while the 64-pin LQFP package leaves sufficient physical connections for power, logic, communication, monitoring, and protected actuator interfaces. Designers must not infer the related L9678P supply or 7.2 V regulator functions for this MPN without verification. Firmware, diagnostic mapping, and actuator protection must be validated as one complete safety-related subsystem.
推荐
Frontal-Impact Restraint Controller
For a frontal-impact restraint controller, the L9678TR-S is relevant because it is a dedicated user-configurable airbag interface rather than a general-purpose logic device. The verified 64-pin LQFP construction and automotive AEC-Q100-series positioning align with a controller that must coordinate crash inputs, deployment decisions, squib monitoring, and diagnostic reporting. Its role is to provide the dedicated deployment interface while the surrounding microprocessor and safety software implement the vehicle strategy. Exact timing, output-current, and diagnostic limits must be obtained from the released manufacturer datasheet before functional-safety calculations or worst-case timing analysis are performed.
推荐
Side-Impact Restraint Module
The L9678TR-S is suitable in principle for a side-impact restraint module that requires a dedicated, configurable deployment interface. The 64-pin LQFP package provides a defined pin budget for separate supply, monitoring, logic, and actuator connections, while the L9678 family's user-configurable approach supports application-specific restraint configurations. Integration remains vehicle dependent because the supplied data does not state channel count, fault-response timing, or thermal limits. Engineers should verify those details, along with production programming and end-of-line diagnostic procedures, against the exact L9678TR-S ordering code before using the device in a side-impact safety architecture.
推荐
Vehicle Restraint Diagnostic System
The L9678TR-S can participate in a vehicle restraint diagnostic system because a user-configurable airbag IC must coordinate deployment-control functions with fault monitoring and diagnostic communication. Its 64-pin LQFP package provides connections for the surrounding control and monitoring circuitry, and the device's AEC-Q100-series automotive association supports use in harsh vehicle environments. Diagnostic coverage, communication behavior, and fault thresholds were not present in the supplied search extract, so no numerical claims are made. Production tooling must use STMicroelectronics' approved configuration method and verify each deployed safety function during end-of-line testing.
推荐
Protected Automotive Squib Interface
The L9678TR-S is designed to support the protected interface between automotive restraint electronics and squib-related actuator circuitry, where configuration, monitoring, and deployment control must be handled by a dedicated device. Its user-configurable airbag architecture and 64-pin LQFP package make it relevant to protected squib-interface designs rather than generic high-side switching. The supplied extract does not provide output-stage topology, current limits, short-circuit behavior, or diagnostic thresholds, so these attributes must not be used to set protection components. Verify them in the manufacturer datasheet and validate them against the vehicle's ISO 26262 safety plan and OEM restraint requirements.
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推荐产品汇总
工程参考数据： L9678TR-S ——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 | L9678PTR | L9678P-S | L9678P |
|---|---|---|---|---|
| Package | 64-LQFP | 64-LQFP | 64-LQFP | 64-LQFP |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Type | User-configurable airbag IC | Automotive airbag IC | User-configurable airbag IC | User-configurable airbag IC |
| Pin Count | 64 pins | 64 pins | 64 pins | 64 pins |
关键差异点
- Exact -S tray-packaged ordering option （对比 L9678PTR)
- Directly documented production-data family （对比 L9678P)
- Verified AEC-Q100-series automotive positioning （对比 L9678P-S)
- Verified same-family 64-pin footprint （对比 L9678P)
设计说明
Use the manufacturer land pattern for the 64-pin LQFP and preserve all exposed thermal and high-current land connections when copying an existing L9678TR-S board. Place input and output decoupling components directly at the associated supply pins, and route protected deployment paths away from sensitive sensing and communication circuitry. Because individual pin names and voltage assignments were not included in the supplied extract, cross-check every net against DocID025869 Rev 3 before fabrication rather than relying on a generic 64-LQFP footprint drawing.
Do not assume that the related L9678P dedicated VDDQ arrangement, external pass-transistor option, or optional 7.2 V regulator also applies to L9678TR-S. Those features are explicitly stated for the related L9678P range but not for the target ordering code. Likewise, confirm the shipping form, programming sequence, diagnostic configuration, output-stage limits, and fault behavior from the exact ordering-code datasheet. A 64-pin package match is necessary for PCB reuse but is not by itself proof of drop-in electrical equivalence.
Treat power distribution and deployment outputs as safety-critical. Verify the target device's exact supply range, quiescent behavior, output-drive limits, short-circuit behavior, and thermal limits in the released manufacturer datasheet before selecting external pass devices, filtering components, or protection networks. Related L9678P documentation describes configurable external current handling, but those statements must not be transferred to L9678TR-S without confirmation. Validate the complete restraint module under worst-case supply, temperature, fault, and load conditions.
Separate the airbag deployment and squib-related power paths from low-level sensor and communication traces, and minimize loop area wherever the final pin assignment permits it. Provide a clean ground reference and place input, output, and bypass connections according to the manufacturer application guidance. Review the final pin table and recommended external circuitry together because the provided extract confirms only the 64-LQFP package and not the complete signal map. A signal-integrity review should be repeated after the exact pin and grounding scheme are selected.
合规信息
The verified distributor results identify the L9678TR-S as part of the AEC-Q100 automotive series. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not explicitly stated in the supplied source extracts.
