component
TJA1042M-3
Public Made by Adomby adom
HGSEMI CAN Transceivers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownTJA1042M-3
HGSEMI · CAN Transceivers · SOP-8
TJA1042M-3 from HGSEMI, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | TXD | input | Transmit data input with an internal pull-up, so the bus stays recessive when TXD is floating; a low level drives the bus dominant, and a TXD dominant timeout (0.3 to 5 ms) releases the bus if TXD is held low. |
| 2 | GND | power_in | Ground reference for the transceiver; all voltages are referenced to this pin. |
| 3 | VCC | power_in | Main supply input, operating range 4.5 to 5.5 V, with undervoltage protection that tri-states the bus outputs when VCC falls below about 3.5 to 4.5 V. |
| 4 | RXD | output | Receive data output that goes high when the bus is recessive and low when the bus is dominant; it is tri-stated when VCC is powered down to prevent reverse current. |
| 5 | VIO/SPLIT | power_in | Dual-function pin: supplies the transceiver I/O level shifter (VIO operating range 2.8 to 5.5 V, allowing 3.3 V MCU interfacing on the TJA1042-3) and also serves as the SPLIT common-mode regulated output at 0.5VCC, which should be tied to the midpoint of the termination in normal mode and left floating in standby. |
| 6 | CANL | bidirectional | Low-level CAN bus line, driven dominant at about 0.5 to 2.25 V with the bus common-mode range of -70 V to +70 V and ±8 kV HBM ESD protection. |
| 7 | CANH | bidirectional | High-level CAN bus line, driven dominant at about 2.75 to 4.5 V with the bus common-mode range of -70 V to +70 V and ±8 kV HBM ESD protection. |
| 8 | STB | input | Standby mode control input with an internal pull-up: low selects normal mode, while high or floating selects low-power standby mode with bus wake-up detection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Interface |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage VCC (withstand) | VCC | -0.3 | 7 | V | 可承受耐压 | 4 | |
| Supply voltage VCC (operating range) | VCC | 4.5 | 5.5 | V | 工作范围 | 4 | |
| I/O supply voltage VIO (withstand) | VIO | -0.3 | 7 | V | 可承受耐压 | 4 | |
| I/O supply voltage VIO (operating range) | VIO | 2.8 | 5.5 | V | 工作范围 | 4 | |
| CANH, CANL common-mode voltage | VCAN | -70 | 70 | V | 4 | ||
| Bus differential voltage | Vdiff | -27 | 27 | V | 4 | ||
| Electrostatic discharge, human body model | VESD | -8 | 8 | kV | 人体模型 | 4 | |
| Actual junction temperature | TVJ | -40 | 150 | ℃ | 实际结温 | 4 | |
| Storage temperature | TSTG | -55 | 150 | ℃ | 4 | ||
| Lead temperature (soldering 10 s) | TLEAD | 245 | ℃ | 焊接 10s | 4 | ||
| VCC supply current, normal mode recessive | ICC | 2.5 | 5 | 10 | mA | 正常模式：隐性 VTXD = VIO | 5 |
| VCC supply current, normal mode dominant | ICC | 20 | 45 | 70 | mA | 正常模式：显性 VTXD = 0V | 5 |
| VCC supply current, standby mode (TJA1042-3) | ICC | 0.5 | 5 | µA | 待机模式：TJA1042-3 | 5 | |
| VIO supply current, normal mode recessive | IIO | 80 | 200 | µA | 正常模式：隐性 VTXD = VIO | 5 | |
| VIO supply current, normal mode dominant | IIO | 350 | 1000 | µA | 正常模式：显性 VTXD = 0V | 5 | |
| VIO supply current, standby mode | IIO | 12 | 17 | µA | 待机模式：VTXD = VIO | 5 | |
| VCC undervoltage protection threshold | Vuvp_VCC | 3.5 | 4.5 | V | 5 | ||
| VIO undervoltage protection threshold | Vuvp_VIO | 1.3 | 2 | 2.7 | V | 5 | |
| TXD low-level input voltage | VIL | -0.3 | V | 5 | |||
| TXD high-level input current | IIH | -5 | 5 | µA | VTXD = VIO | 5 | |
| TXD low-level input current | IIL | -260 | -150 | -30 | µA | 正常模式：VTXD = 0V | 5 |
| STB low-level input voltage | VIL | -0.3 | V | 5 | |||
| STB high-level input current | IIH | -1 | 1 | µA | VSTB = VIO | 5 | |
| STB low-level input current | IIL | -15 | -1 | µA | VSTB = 0V | 5 | |
| RXD high-level output current | IOH | -8 | -3 | -1 | mA | 正常模式：VRXD = VIO - 0.4V | 5 |
| RXD low-level output current | IOL | 2 | 5 | 12 | mA | VRXD = 0.4V，总线显性 | 5 |
| CANH dominant output voltage | VOH(D) | 2.75 | 3.5 | 4.5 | V | VTXD = 0V | 6 |
| CANL dominant output voltage | VOL(D) | 0.5 | 1.5 | 2.25 | V | VTXD = 0V | 6 |
| Bus differential output voltage, dominant | VO(D) | 1.5 | 3 | V | VTXD = 0V | 6 | |
| Bus differential output voltage, recessive | VOD(R) | -12 | 12 | mV | VTXD = VIO；隐性 45Ω<RL<65Ω | 6 | |
| Dominant output voltage symmetry | Vdom(TX)sym | -400 | 400 | mV | Vdom(TX)sym = VCC - VCANH - VCANL | 6 | |
| Common-mode output voltage | VOC | 2 | 2.5 | 3 | V | VSTB = 0V | 6 |
| Difference between dominant and recessive common-mode output voltage | △VOC | 30 | mV | 6 | |||
| Short-circuit output current, dominant (CANH to -12V) | IOS | -100 | -70 | mA | VCANH = -12V，VCANL = open | 6 | |
| Short-circuit output current, dominant (CANH at 12V) | IOS | 0.36 | 1 | mA | VCANH = 12V，VCANL = open | 6 | |
| Short-circuit output current, dominant (CANL at -12V) | IOS | -1 | 0.5 | mA | VCANL = -12V，VCANH = open | 6 | |
| Short-circuit output current, dominant (CANL at 12V) | IOS | 70 | 100 | mA | VCANL = 12V，VCANH = open | 6 | |
| Recessive output current | IO(R) | -5 | 5 | mA | 正常模式：VTXD = VIO，-27V< VCAN <32V | 6 | |
| Transmitter propagation delay, low to high | tPLH | 90 | ns | VSTB = 0V | 6 | ||
| Transmitter propagation delay, high to low | tPHL | 65 | ns | 6 | |||
| Standby to normal mode delay | td(stb-norm) | 47 | µs | 6 | |||
| TXD dominant timeout | tdom_TXD | 0.3 | 2 | 5 | ms | 6 | |
| BUS dominant timeout | tdom_BUS | 0.3 | 2 | 5 | ms | 6 | |
| Bus wake-up time | twake | 0.5 | 5 | µs | 6 | ||
| Positive input threshold voltage | VIT+ | 500 | 700 | 900 | mV | VSTB = 0V | 7 |
| Negative input threshold voltage | VIT- | 650 | mV | 7 | |||
| Input threshold hysteresis | VHYS | 50 | 120 | 200 | mV | 7 | |
| Bus input current, unpowered | IO(off) | -5 | 5 | µA | VCANH or VCANH = 5V, Other pin = 0V | 7 | |
| CANH, CANL differential input resistance to ground | RIN | 9 | 15 | 28 | KΩ | VTXD = VIO, VSTB = 0V | 7 |
| CANH, CANL differential input resistance | RID | 19 | 30 | 52 | KΩ | 7 | |
| Input resistance mismatch | RImatch | -1 | 1 | % | 7 | ||
| Common-mode input voltage range | VCOM | -30 | 30 | V | 7 | ||
| Receiver propagation delay, low to high | tPLH | 65 | ns | VSTB = 0V | 7 | ||
| Bit time on BUS pin | tbit(BUS) | 435 | 530 | ns | tbit(TXD) = 500ns | 7 | |
| Bit time on BUS pin | tbit(BUS) | 155 | 210 | ns | tbit(TXD) = 200ns | 7 | |
| Bit time on RXD pin | tbit(RXD) | 400 | 550 | ns | tbit(TXD) = 500ns | 7 | |
| Bit time on RXD pin | tbit(RXD) | 120 | 220 | ns | tbit(TXD) = 200ns | 7 | |
| Loop delay 1, driver input to receiver output, recessive to dominant | Td(LOOP1) | 60 | 220 | ns | VSTB = 0V；隐性到显性 | 7 | |
| Loop delay 2, driver input to receiver output, dominant to recessive | Td(LOOP2) | 60 | 220 | ns | 显性到隐性 | 7 | |
| Thermal shutdown junction temperature | Tj(sd) | 190 | ℃ | 7 |
CAD (KiCad official)
- Symbol:
TJA1042M-3 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
tja1042m-3-etched.step/tja1042m-3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);tja1042m-3.step/tja1042m-3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HGSEMI datasheet (13 pp, sha256
ea83dd256aba04f9, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).