# TCAN3403DRBRQ1

**TEXAS INSTRUMENTS** · Global Sourcing Parts · SON-8-EP(3x3)

TCAN3403DRBRQ1 from TEXAS INSTRUMENTS, in a SON-8-EP(3x3). 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 | CAN transmit data logic input with an integrated pull-up, referenced to VIO on the TCAN3403-Q1; absolute maximum is -0.3 V to 6 V. |
| 2 | GND | power_in | Ground connection that must be connected to the PCB ground. |
| 3 | VCC | power_in | 3.3 V supply voltage; recommended range is 3 V to 3.6 V with absolute maximum of -0.3 V to 6 V. |
| 4 | RXD | output | CAN receive data logic output, referenced to VIO on the TCAN3403-Q1 and tri-stated when the device is powered off; absolute maximum output current is 8 mA. |
| 5 | VIO | power_in | I/O supply voltage for the logic interface on the TCAN3403-Q1, supporting 1.7 V to 3.6 V (not present on TCAN3404-Q1, where this pin is SHDN). |
| 6 | CANL | bidirectional | Low-level CAN bus input/output line; CANH and CANL bus voltage is limited to -58 V to 58 V. |
| 7 | CANH | bidirectional | High-level CAN bus input/output line; CANH and CANL bus voltage is limited to -58 V to 58 V. |
| 8 | STB | input | Standby mode control input with an integrated pull-up; leaving it floating or high puts the device in standby mode, and tying it to GND selects normal mode. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TEXAS INSTRUMENTS |
| Package | SON-8-EP(3x3) |
| Category | Global Sourcing Parts |
| Pins | 9 |

## 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 | -0.3 |  | 6 | V |  | 4 |
| Supply voltage I/O level shifter (only for TCAN3403) | VIO | -0.3 |  | 6 | V |  | 4 |
| CAN bus I/O voltage range on CANH and CANL | VBUS | -58 |  | 58 | V |  | 4 |
| Max differential voltage between CANH and CANL | VDIFF | -58 |  | 58 | V | VDIFF = (CANH - CANL) | 4 |
| Logic pin input voltage (TXD, STB, SHDN) | VLogic_Input | -0.3 |  | 6 | V |  | 4 |
| Logic output voltage range (RXD) | VRXD | -0.3 |  | 6 | V |  | 4 |
| RXD output current | IO(RXD) | -8 |  | 8 | mA |  | 4 |
| Junction temperature | TJ | -40 |  | 165 | °C |  | 4 |
| Storage temperature | TSTG | -65 |  | 150 | °C |  | 4 |
| Supply voltage | VCC | 3 | 3.3 | 3.6 | V |  | 4 |
| Supply voltage for I/O level shifter (only for TCAN3403) | VIO | 1.7 |  | 3.6 | V |  | 5 |
| RXD terminal high-level output current | IOH(RXD) |  |  | -2 | mA |  | 5 |
| RXD terminal low-level output current | IOL(RXD) |  |  | 2 | mA |  | 5 |
| RXD terminal high-level output current (only for TCAN3403) | IOH(RXD) |  |  | -1.5 | mA |  | 5 |
| RXD terminal low-level output current (only for TCAN3403) | IOL(RXD) |  |  | 1.5 | mA |  | 5 |
| Junction temperature | TJ | -40 |  | 150 | °C |  | 5 |
| Supply current normal mode, dominant | ICC |  | 42 | 55 | mA | TXD = 0 V, STB = 0 V, RL = 60 Ω, CL = open | 5 |
| Supply current normal mode, dominant | ICC |  | 50 | 60 | mA | TXD = 0 V, STB = 0 V, RL = 50 Ω, CL = open | 5 |
| Supply current normal mode, recessive | ICC |  | 7 | 8.2 | mA | TXD = VCC, STB = 0 V, RL = 50 Ω, CL = open | 5 |
| Supply current normal mode, dominant with bus fault | ICC |  |  | 130 | mA | TXD = 0 V, STB = 0 V, CANH = CANL = ±25 V, RL = open, CL = open | 5 |
| Supply current standby mode (TCAN3403) | ICC |  | 1 | 2 | µA | TXD = STB = VIO, RL = 50 Ω, CL = open, TJ <= 85 °C | 5 |
| I/O supply current normal mode, dominant (TCAN3403) | IIO |  | 125 | 300 | µA | TXD = 0 V, STB = 0 V, RL = 60 Ω, CL = open, RXD floating | 6 |
| I/O supply current normal mode, recessive (TCAN3403) | IIO |  | 19 | 48 | µA | TXD = VIO, STB = 0 V, RL = 60 Ω, CL = open, RXD floating | 6 |
| Undervoltage detection VCC rising | UVCC(R) | 2.75 |  | 2.9 | V | Ramp up | 6 |
| Undervoltage detection on VCC falling | UVCC(F) | 2.5 |  | 2.65 | V | Ramp down | 6 |
| Undervoltage detection VIO rising (TCAN3403) | UVIO(R) | 1.6 |  | 1.65 | V | Ramp up | 6 |
| Undervoltage detection on VIO falling (TCAN3403) | UVIO(F) | 1.4 |  | 1.5 | V | Ramp down | 6 |
| Dominant output voltage normal mode, CANH | VO(DOM) | 2.25 |  |  | V | TXD = 0 V, STB, SHDN = 0 V, 50 Ω ≤ RL ≤ 65 Ω, CL = open | 6 |
| Dominant output voltage normal mode, CANL | VO(DOM) | 0.5 |  | 1.25 | V | TXD = 0 V, STB, SHDN = 0 V, 50 Ω ≤ RL ≤ 65 Ω, CL = open | 6 |
| Recessive output voltage normal mode CANH and CANL | VO(REC) | 1.5 | 1.9 | 2.25 | V | TXD = VIO or VCC, STB, SHDN = 0 V, RL = open (no load), CL = open | 6 |
| Driver symmetry | VSYM | 0.9 |  | 1.1 | V/V | TXD = 250 kHz, 1 MHz, 2.5 MHz, STB, SHDN = 0 V, RL = 60, CSPLIT = 4.7 nF, CL = open | 7 |
| DC output symmetry | VSYM_DC | -400 |  | 400 | mV | STB, SHDN = 0 V, RL = 60 Ω, CL = open | 7 |
| Differential output voltage normal mode, dominant | VOD(DOM) | 1.5 |  | 3 | V | TXD = 0 V, STB, SHDN = 0 V, 50 Ω ≤ RL ≤ 65 Ω, CL = open | 7 |
| Differential output voltage normal mode, dominant | VOD(DOM) | 1.5 |  | 3.4 | V | TXD = 0 V, STB, SHDN = 0 V, RL = 2240 Ω, CL = open | 7 |
| Differential output voltage normal mode, recessive | VOD(REC) | -120 |  | 12 | mV | TXD = VIO or VCC, STB, SHDN = 0 V, RL = 60 Ω, CL = open | 7 |
| Differential output voltage normal mode, recessive | VOD(REC) | -50 |  | 50 | mV | TXD = VIO or VCC, STB, SHDN = 0 V, RL = open, CL = open | 7 |
| Short-circuit bus output current, dominant, normal mode | IOS(DOM) | -115 |  | 115 | mA | V(CANH) = -15 V to 40 V, CANL = open, TXD = 0 V | 7 |
| Input threshold voltage normal mode | VIT | 500 |  | 900 | mV | -30 V ≤ VCM ≤ 30 V, STB, SHDN= 0 V | 7 |
| Input threshold standby mode, TCAN3403 | VIT(STB) | 400 |  | 1150 | mV | VIO = 3 V to 3.6 V, -30 V ≤ VCM ≤ 30 V, STB= VIO | 7 |
| Normal mode dominant state differential input voltage range | VDOM | 0.9 |  | 9 | V | -30 V ≤ VCM ≤ 30 V, STB, SHDN= 0 V | 7 |
| Normal mode recessive state differential input voltage range | VREC | -4 |  | 0.5 | V | -30 V ≤ VCM ≤ 30 V, STB, SHDN= 0 V | 7 |
| Standby mode dominant state differential input voltage range | VDOM(STB) | 1.15 |  | 9 | V | SHDN= 0 V, STB = VIO, -30 V ≤ VCM ≤ 30 V | 7 |
| Common mode range normal and standby modes | VCM | -30 |  | 30 | V |  | 8 |
| Input differential resistance | RID | 25 |  | 50 | kΩ | TXD = VIO, STB = 0 V, -30 V ≤ VCM ≤ 30 V | 8 |
| Single ended input resistance (CANH or CANL) | RIN | 13 |  | 25 | kΩ |  | 8 |
| High-level input leakage current TXD | IIH | -2.5 | 0 | 1 | µA | TXD = VCC = VIO = 3.6 V | 8 |
| Low-level input leakage current TXD | IIL | -200 | -100 | -20 | µA | TXD = 0 V, VCC = VIO = 3.6 V | 8 |
| High-level input leakage current STB | IIH | -2 |  | 2 | µA | VCC = VIO = STB = 3.6 V | 8 |
| Low-level input leakage current STB | IIL | -20 |  | -2 | µA | VCC = VIO = 3.6 V, STB = 0 V | 8 |
| Device loop delay, driver input (TXD) to receiver output (RXD), recessive to dominant | tPROP(LOOP1) |  | 95 | 180 | ns | normal mode, VCC = VIO = 3 V to 3.6 V, RL = 60 Ω, CL = 100 pF, CL(RXD) = 15 pF | 9 |
| Device loop delay, driver input (TXD) to receiver output (RXD), dominant to recessive | tPROP(LOOP2) |  | 120 | 180 | ns | normal mode, VCC = VIO = 3 V to 3.6 V, RL = 60 Ω, CL = 100 pF, CL(RXD) = 15 pF | 9 |
| Propagation delay time, low-to-high TXD edge to driver recessive | tprop(TxD-busrec) |  | 65 | 100 | ns | See 图 7-2, STB, SHDN = 0 V, RL = 60 Ω, CL = 100 pF, VCC = VIO = 3 V to 3.6 V | 9 |
| Propagation delay time, high-to-low TXD edge to driver dominant | tprop(TxD-busdom) |  | 46 | 100 | ns | See 图 7-2, STB, SHDN = 0 V, RL = 60 Ω, CL = 100 pF, VCC = VIO = 3 V to 3.6 V | 10 |
| Differential output signal rise time | tR |  | 32 | 57 | ns | See 图 7-2, STB, SHDN = 0 V, RL = 60 Ω, CL = 100 pF | 10 |
| Differential output signal fall time | tF |  | 30 | 50 | ns | See 图 7-2, STB, SHDN = 0 V, RL = 60 Ω, CL = 100 pF | 10 |
| Propagation delay time, bus recessive input to RXD high output | tprop(busrec-RXD) |  | 55 | 90 | ns | See 图 7-3, STB, SHDN = 0 V, CL(RXD) = 15 pF, VCC = VIO = 3 V to 3.6 V | 10 |
| Propagation delay time, bus dominant input to RXD low output | tprop(busdom-RXD) |  | 45 | 90 | ns | See 图 7-3, STB, SHDN = 0 V, CL(RXD) = 15 pF, VCC = VIO = 3 V to 3.6 V | 10 |
| Junction-to-ambient thermal resistance (DRB VSON package) | RΘJA |  | 50.9 |  | ℃/W |  | 5 |

## CAD (KiCad official)

- Symbol: `TCAN3403DRBRQ1`
- Footprint: `Package_SON:WSON-8-1EP_3x3mm_P0.5mm_EP1.6x2.0mm`
- 3D model: SON-8-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tcan3403drbrq1-etched.step` / `tcan3403drbrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tcan3403drbrq1.step` / `tcan3403drbrq1.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [TEXAS INSTRUMENTS datasheet](https://www.ti.com.cn/cn/lit/ds/symlink/tcan3403-q1.pdf?ts=1736857521750&ref_url=https%253A%252F%252Fwww.ti.com.cn%252Fproduct%252Fcn%252FTCAN3403-Q1) (46 pp, sha256 `78c6678aaa98c8fe`, retrieved 2026-10-20, 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`, primary `claude-haiku-5-5` (text), consensus `claude-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).

[Datasheet PDF](docs/tcan3403drbrq1-datasheet.pdf)