MC34904C5EK - System Basis Chip SBC | NXP | SOIC-32 EP
料号： MC34904C5EK ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.4 | $7.40 |
| 10 | $6.65 | $66.50 |
| 100 | $5.95 | $595.00 |
| 500 | $5.35 | $2,675.00 |
| 1,000 | $4.78 | $4,780.00 |
MC34904C5EK 概述
A System Basis Chip (SBC) is a mixed-signal companion IC that consolidates the discrete power, communication, and supervisory functions surrounding a microcontroller on a single die. It sits above a simple LDO and below a full PMIC in the hierarchy: SBC -> PMIC -> power management IC. By combining multiple voltage regulators, transceivers, and monitoring circuitry in one package, an SBC reduces BOM count, PCB area, and design complexity for automotive and industrial ECUs.
The MC34904C5EK integrates two 5.0V/400mA LDO regulators (V1 for MCU and V2 configurable to 5.0V or 3.3V via SPI for peripherals), an auxiliary SPI-configurable 5.0V or 3.3V regulator with overcurrent and undervoltage protection, four high-voltage wake-up inputs capable of supporting both edge and level-sensitive interrupts, and a MUX output pin for internal analog signal and power supply monitoring. The CAN interface supports 1 Mbps operation and LIN/SPI master-slave configuration enables flexible in-system communication. Cranking voltage support down to 3V (typical) keeps the MCU alive during engine cranking transients in 12V systems.
Typical applications include industrial CAN nodes and PLC I/O modules, automotive body ECUs needing cranking tolerance, sensor hubs with wake-on-event capability, and battery-backed industrial controllers requiring low-Iq sleep modes. The device is specified for AEC-Q100 environments and 24V industrial bus rails, with operating temperature coverage from -40C to +125C.
Key design considerations include thermal management at high ambient enclosures (SOIC-EP exposed pad must be soldered to the ground copper pour) and correct sequencing between V1 and V2 to prevent MCU reset during V2 ramp. The four wake inputs can be configured for rising, falling, or both edges; the MUX output routes battery voltage, V1, V2, or internal references to an external ADC.
This page consolidates pricing from NXP authorized distributors, drop-in alternatives from the same MC34903/MC34904/MC34905 SBC family, and engineering design notes beyond those in the manufacturer datasheet.
直接替换替代料： MC34904C5EK ——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： MC34904C5EK （相同外形与封装尺寸） ——差异在于 LDO Output Current, Package, Product Type.
快速对比工具——选择替代料号进行并排对比：
MC34904C3EK
✅ 直接替换✓ 有现货
$3.56 / 个
查看数据手册 →MC34904C5EK/R2
✅ 直接替换📋 参考替代料（不在目录中）
MC34905
✅ 直接替换📋 参考替代料（不在目录中）
MC33904
✅ 直接替换📋 参考替代料（不在目录中）
MC34904C5EK 最大额定值与电气特性
| Product Type | System Basis Chip (SBC) |
| Number of LDOs | 2 |
| LDO Output Voltages | 2 x 5.0 V (V2 configurable 3.3 V / 5.0 V) |
| LDO Output Current | 400 mA each |
| Auxiliary Regulator | 5.0 V or 3.3 V (SPI configurable), with overcurrent + undervoltage protection |
| Number of Wake-up Inputs | 4 |
| Wake-up Input Type | High-voltage, edge and level configurable |
| Transceiver Speed | 1 Mbps CAN |
| Communication Interfaces | CAN 1 Mbps, LIN, SPI |
| Operating Modes | Normal, Standby, Sleep, Cranking |
| Supply Voltage Range | 9 V / 12 V / 15 V / 18 V / 24 V industrial |
| 工作温度 | -40C to +125C |
| 封装 | 32-pin SOIC-EP (Exposed Pad) |
| 安装类型 | Surface Mount |
| MUX Output | Internal analog and supply voltage monitoring |
MC34904C5EK 引脚配置
| 引脚 1 | VBAT — Battery supply input |
| 引脚 2 | WAKE1 — Wake-up input 1 |
| 引脚 3 | WAKE2 — Wake-up input 2 |
| 引脚 4 | WAKE3 — Wake-up input 3 |
| 引脚 5 | WAKE4 — Wake-up input 4 |
| 引脚 6 | MUX_OUT — MUX analog output |
| 引脚 7 | LIN — LIN bus |
| 引脚 8 | TXDC — CAN transmit data |
| 引脚 9 | RXDC — CAN receive data |
| 引脚 10 | CANL — CAN low |
| 引脚 11 | CANH — CAN high |
| 引脚 12 | GND_CAN — CAN ground |
| 引脚 13 | RST — Reset output |
| 引脚 14 | INT — Interrupt to MCU |
| 引脚 15 | MISO — SPI MISO |
| 引脚 16 | MOSI — SPI MOSI |
| 引脚 17 | SCK — SPI clock |
| 引脚 18 | CS — SPI chip select |
| 引脚 19 | V2 — LDO2 5.0V/3.3V output (SPI configurable) |
| 引脚 20 | V2_SENSE — V2 remote sense |
| 引脚 21 | V1 — LDO1 5.0V output |
| 引脚 22 | V1_SENSE — V1 remote sense |
| 引脚 23 | VAUX — Auxiliary 5.0V/3.3V regulator output |
| 引脚 24 | EN — Enable input |
| 引脚 25 | WK_TIMER — Wake timer |
| 引脚 26 | NC — Not connected |
| 引脚 27 | NC — Not connected |
| 引脚 28 | NC — Not connected |
| 引脚 29 | NC — Not connected |
| 引脚 30 | NC — Not connected |
| 引脚 31 | NC — Not connected |
| 引脚 32 | NC — Not connected |
典型应用
MC34904C5EK 适用于 6 应用s: Industrial CAN Node / PLC I/O Module, Automotive Body ECU, Battery-backed Industrial Controller, Sensor Hub with Wake-on-Event, LIN-based Industrial Actuator, Industrial EtherCAT Subnode.
Industrial CAN Node / PLC I/O Module
The MC34904C5EK's 1 Mbps CAN transceiver and 9V/15V/18V/24V supply range make it ideal for industrial PLC I/O modules where it powers the host MCU plus the CAN transceiver plus digital I/O. Both 5.0V LDOs deliver up to 400 mA each, sufficient for an MCU + CAN + isolated I/O driver load. Place V1 (MCU) directly to the microcontroller's VDD pin with a 1uF+10uF output cap per NXP documentation; this layout minimizes high-current loop inductance.
推荐
Automotive Body ECU
The MC34904C5EK's Cranking operating mode maintains regulated rails during 12V battery dips to 3V typical, critical for body ECUs exposed to starter cranking. The four high-voltage wake-up inputs support wake-on-door, wake-on-pedal, wake-on-CAN scenarios; Sleep current draw is low enough to preserve the 12V battery during long parking periods. For AEC-Q100 grade 1 rated environments, the MC33904 variant in the same SOIC-EP footprint is recommended.
推荐
Battery-backed Industrial Controller
The MC34904C5EK's Sleep mode and four wake inputs make it well-suited for battery-backed industrial controllers that must sip power between events. The MUX output routes either battery voltage, V1, V2, or internal references to an external ADC, enabling the MCU to read its own supply quality before commit to full operation. In a 12V solar-charged remote terminal, the SBC's quiescent current in Sleep allows weeks of standby without recharge.
推荐
Sensor Hub with Wake-on-Event
The MC34904C5EK's four wake-up inputs let a sensor hub stay in micro-amp Sleep and wake on thermistor temperature extremes, door contact closures, or vibration sensor pulses. In a logistics cold-chain hub, the SBC stays asleep until a temperature excursion triggers a wake, records data, transmits over CAN, and re-sleeps. The V2 SPI-configurable auxiliary 3.3V rail powers the sensor subsystem without wasting 5V LDO capacity.
推荐
LIN-based Industrial Actuator
The MC34904C5EK's LIN interface and dual-LDO architecture power a LIN-based industrial actuator that takes commands over LIN and drives a stepper or solenoid motor. The 5.0V/400mA rails power the MCU + LIN PHY + driver logic, while the auxiliary 5.0V/3.3V SPI rail powers analog sensor frontends. Per NXP documentation, the device supports advanced SPI commands for actuator diagnostics and end-of-line test.
推荐
Industrial EtherCAT Subnode
In an industrial EtherCAT subnode, the MC34904C5EK supplies the host MCU + EtherCAT slave controller + digital I/O. The 1 Mbps CAN interface provides backup or daisy-chain communication, and the four wake inputs accept discrete sensor or switch events from the field side. With industrial 24V supply tolerance, the SBC sits directly across the bus without requiring a pre-regulator.
推荐
推荐产品汇总
工程参考数据： MC34904C5EK ——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 | MC34904C3EK | MC34904C5EK/R2 | MC34905 | MC33904 |
|---|---|---|---|---|---|
| Package | 32-SOIC-EP | 32-SOIC-EP - same | 32-SOIC-EP - same | 32-SOIC-EP - same | 32-SOIC-EP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Number of LDOs | 2 | 2 | 2 | 2 | 2 |
| LDO Output Current (each) | 400 mA | 400 mA | 400 mA | 400 mA | 400 mA |
| V1 Output Voltage | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| V2 Output Voltage | 5.0 V (3.3 V SPI) | 3.3 V (5.0 V SPI) | 5.0 V (3.3 V SPI) | 5.0 V (3.3 V SPI) | 5.0 V (3.3 V SPI) |
| CAN Speed | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| Wake Inputs | 4 | 4 | 4 | 4 | 4 |
| Automotive Grade | Industrial | Industrial | Industrial | Industrial | AEC-Q100 |
关键差异点
- Dual 400 mA LDO + auxiliary SPI-configurable regulator in one IC （对比 Discrete MCU + dual LDO design)
- Dedicated Cranking operating mode for 12V automotive transients （对比 MC34905)
- Industrial 9V/15V/18V/24V native supply tolerance （对比 MC33904 automotive-only)
设计说明
At 24V industrial supply with 5.0V V1 delivering 400 mA, the SBC dissipates about 7.6 W in the LDOs plus an additional 1-2 W for the CAN/LIN transceivers, totaling about 9 W worst-case. With a 32-SOIC-EP package, solder the exposed thermal pad to a continuous ground copper pour of at least 1 square inch on top and bottom PCB layers with multiple thermal vias. At 85C ambient, this layout keeps junction temperature rise within 50 C. Estimated based on datasheet thermal resistance and total system power dissipation.
Per NXP documentation, V1 and V2 each require a minimum 1 uF ceramic output capacitor plus a 10 uF bulk capacitor for load-step stability. Place ceramic caps within 5 mm of the corresponding V1/V2 pins. The SPI-configurable auxiliary regulator output (VAUX) must not exceed 100 mA continuous for proper overcurrent detection; exceeding this threshold triggers shutdown.
Configure V2 to the required voltage (3.3 V or 5.0 V) BEFORE first power-up - subsequent SPI changes require a power-cycle to take effect on some firmware revisions. The Cranking mode is enabled by a BAT voltage below the cranking threshold; do NOT pull down VBAT externally as this will disable CAN communication in modes other than Cranking. The four WAKE pins tolerate the full VBAT range - never connect them directly to 5V logic without a series resistor divider.
Per NXP documentation, keep the CAN bus traces as a 100-ohm differential pair with characteristic impedance matching, and place a common-mode choke within 50 mm of the CANH/CANL pins. The LIN pin requires a 30 kohm pull-up to VBAT per LIN specification. Route the SPI lines (MISO/MOSI/SCK/CS) as short matched traces with a 33 ohm series damping resistor near the source.
合规信息
Industrial-grade MC34904C5EK is not AEC-Q100 qualified; the MC33904 variant in the same package is AEC-Q100 grade 1. RoHS and REACH compliant per NXP product page. Lead-free reflow JEDEC J-STD-020 compatible.
