TLIN1124A-Q1 - Automotive Quad LIN Transceiver | Texas Instruments
MPN: TLIN1124A-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.62 | $26.20 |
| 100 | $2.31 | $231.00 |
| 500 | $2.05 | $1,025.00 |
| 1,000 | $1.82 | $1,820.00 |
| 3,000 | $1.55 | $4,650.00 |
TLIN1124A-Q1 Overview
A LIN transceiver is a physical-layer device that connects a microcontroller's logic-level UART/SPI pins to the single-wire LIN bus used in distributed automotive body and chassis networks. LIN transceivers sit between the protocol controller and the bus cable, handling dominant/recessive bit arbitration, slew-rate control, bus fault tolerance, and remote wake-up. Compared to CAN, LIN targets low-cost sub-buses for non-safety-critical nodes like mirror adjusters, seat modules, ambient lighting, and rain/light sensors, and is standardized by ISO 17987-4 and SAE J2602-1.
Key features include compliance with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO/DIS 17987-4, and SAE J2602-1; receiver capability for high-speed downloads up to 100 kbps (above the LIN spec ceiling) useful for end-of-line firmware programming; integrated commander and responder termination; thermal shutdown; bus dominant time-out; and an INH pin for managing an external voltage regulator during low-power standby. The wide 5V-28V battery range makes the part suitable for 12V automotive supply rails and 24V commercial-vehicle systems.
Architecturally, each of the four LIN channels uses a slope-controlled open-drain driver and a wide-common-mode receiver, with separate TXD/RXD logic interfaces per channel. The commander pull-up (typically a diode + resistor ladder) is internal, eliminating external components on the master node. The part is qualified to AEC-Q100 Grade 1, supporting -40°C to +125°C operation, and integrates ±8 kV HBM ESD protection on the LIN bus pins.
Typical applications include body control modules, HVAC control units, seat control modules, door/window liftgate modules, steering column switches, and rear-view mirror modules in 12V automotive networks. The quad channel density allows one IC to service multiple LIN sub-buses in a single ECU footprint.
When designing with this device, route the LIN bus traces as short and symmetric as possible and keep them away from high-dV/dt switching nodes. Use a 100 nF ceramic bypass capacitor close to each VCC pin and a bulk capacitor on the battery rail to ride out load-dump transients. The INH pin may be used to control an external LDO for ultra-low standby current.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving automotive hardware engineers a single reference for sourcing, second-sourcing, and layout guidance for the TLIN1124A-Q1.
Drop-in alternatives for TLIN1124A-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TLIN1124ARGYR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TLIN1124ARGYRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
TLIN2024A-Q1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.81 / Unit
View Datasheet →TJA1124AHG
✅ Drop-In📋 Reference alternative (not in catalog)
TLIN1124A-Q1 Specifications
| Function | Quad Local Interconnect Network (LIN) transceiver |
| Protocol Standards | LIN 2.0 / 2.1 / 2.2 / 2.2A; ISO/DIS 17987-4; SAE J2602-1 |
| Number of Channels | 4 (quad) |
| Supply Voltage Range | 5 V to 28 V (12V battery application) |
| LIN Bus Fault Tolerance | ±40 V extended |
| Maximum LIN Data Rate (LIN spec) | 20 kbps |
| Maximum Receiver Data Rate | 100 kbps (high-speed download) |
| Operating Temperature Range | -40 C to +125 C |
| Package | VQFN-24 (RGY) 5.5x3.5 mm |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 Grade 1 |
| Integrated Commander Pull-up | Yes (diode + resistor) |
| Inhibit (INH) Pin | Yes |
| Local Wake-up | Yes |
| Thermal Shutdown | Yes (integrated) |
| Bus Dominant Time-out | Yes (integrated) |
| RoHS Status | Compliant |
TLIN1124A-Q1 Pin Configuration
| Pin 1 | TXD1 — Logic-level transmit data input for channel 1 |
| Pin 2 | RXD1 — Logic-level receive data output for channel 1 |
| Pin 3 | VCC — Battery supply input (5 V to 28 V) |
| Pin 4 | LIN1 — LIN bus pin for channel 1 (integrated commander pull-up) |
| Pin 5 | LIN2 — LIN bus pin for channel 2 (integrated commander pull-up) |
| Pin 6 | GND — Ground |
| Pin 7 | LIN3 — LIN bus pin for channel 3 (integrated commander pull-up) |
| Pin 8 | LIN4 — LIN bus pin for channel 4 (integrated commander pull-up) |
| Pin 9 | INH — Inhibit output - controls external voltage regulator for low-power standby |
| Pin 10 | WAKE — Local wake-up input from LIN bus |
| Pin 11 | TXD2 — Logic-level transmit data input for channel 2 |
| Pin 12 | RXD2 — Logic-level receive data output for channel 2 |
| Pin 13 | TXD3 — Logic-level transmit data input for channel 3 |
| Pin 14 | RXD3 — Logic-level receive data output for channel 3 |
| Pin 15 | TXD4 — Logic-level transmit data input for channel 4 |
| Pin 16 | RXD4 — Logic-level receive data output for channel 4 |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | EP — Exposed thermal pad - solder to ground for thermal dissipation |
Typical Applications
TLIN1124A-Q1 is suitable for 7 applications: Body Control Modules (BCM), HVAC Control Units, Seat Control Modules, Door / Window Liftgate Modules, Steering Column Switch Modules, Rear-View Mirror Modules, LED Interior Lighting Modules.
Body Control Modules (BCM)
The TLIN1124A-Q1 fits body control modules because its four integrated LIN channels replace up to four discrete single-channel transceivers in a single VQFN-24 footprint, cutting PCB area by ~60% and BOM count by 4 parts. The 5V-28V supply range directly accepts the 12V battery rail, and ±40V bus fault tolerance guards BCM LIN connectors against jump-start and load-dump transients. AEC-Q100 Grade 1 qualification (-40C to +125C) ensures operation under hood-mounted BCMs in cold-start and summer-cabin conditions. Placed between the BCM microcontroller (e.g. S912XEQ512J2MAA) and the LIN sub-bus connectors with 100nF ceramic bypass caps on VCC, the part delivers commander-capable outputs on every channel without external pull-ups.
Recommended
HVAC Control Units
In HVAC control units the TLIN1124A-Q1 drives multiple LIN sub-buses that connect stepper-motor damper actuators, blower controllers, and sensor pods to a single master MCU. The integrated commander pull-up on every channel lets one IC act as the master on up to four LIN lines, eliminating 8 external resistor-diode networks and reducing PCB complexity. The wave-shaping driver minimizes EME, helping designers pass CISPR 25 Class 5 radiated emissions without extra shielding. Power dissipation at maximum baud is modest thanks to the current-limited driver; place a 100nF X7R bypass on each VCC pin and route LIN traces symmetrically to keep duty-cycle-induced emissions low.
Recommended
Seat Control Modules
The TLIN1124A-Q1 is well suited to seat control modules where multiple LIN nodes control seat-position motors, heating pads, and occupant sensors. The 100 kbps receiver-capable data rate enables end-of-line programming of seat-node firmware without a separate programming connector. The INH pin can be used to gate the seat-module LDO during deep standby, achieving <100 uA quiescent current - critical for parking-months current budgets mandated by many OEMs. AEC-Q100 Grade 1 qualification supports the temperature envelope near the seat heaters, and the VQFN-24 (RGY) 5.5x3.5 mm package is small enough to fit inside the seat-control ECU housing.
Recommended
Door / Window Liftgate Modules
Door, window, and liftgate modules use the TLIN1124A-Q1 to run four LIN channels that interconnect mirror adjusters, window motors, lock actuators, and puddle-light controllers. The wide 5V-28V supply tolerates supply drops during cranking and inductive kick from window motors, while ±40V bus fault tolerance handles the harsh automotive transient environment. AEC-Q100 Grade 1 and integrated thermal shutdown protect the part during stalled-motor events where the LIN bus may see extended dominant periods. The exposed thermal pad of the VQFN-24 (RGY) package should be soldered to at least 100 mm^2 of copper for heat spreading.
Recommended
Steering Column Switch Modules
Steering column switch modules interface the driver's column-mounted buttons (wipers, indicators, lights, cruise) over LIN to the BCM, and the TLIN1124A-Q1 integrates four LIN channels in one VQFN-24 footprint that fits inside the tight column-housing geometry. The integrated commander pull-up on every channel lets the column module be a LIN master that talks to multiple satellite switch pods without external components. The wave-shaping driver minimizes EME, important because the steering column is close to AM/FM antennae runs. Use 100nF X7R ceramic bypass capacitors close to the VCC pin and short, twisted-pair LIN wiring to maintain signal integrity through rotating slip rings.
Recommended
Rear-View Mirror Modules
Rear-view mirror modules integrate turn-signal indicators, auto-dimming displays, blind-spot indicators and ambient lighting, and the TLIN1124A-Q1 provides four LIN channels in a small VQFN-24 footprint suitable for the mirror's slim housing. The integrated commander pull-up eliminates external components, allowing the mirror module to act as a LIN master over its sub-bus. AEC-Q100 Grade 1 qualification with -40C to +125C operation tolerates both cold-start and direct-sunlight conditions on the windshield. Low quiescent current via the INH pin supports OEM standby budgets for parked vehicles.
Recommended
LED Interior Lighting Modules
RGBW LED interior lighting modules use LIN to receive color and brightness commands from the BCM, and the TLIN1124A-Q1's four LIN channels allow one IC to serve four independent lighting zones (footwell, door, roof console, puddle) from a single MCU. The wave-shaping driver minimizes EME, helping designers pass CISPR 25 with the long LED wiring harness acting as an unintentional antenna. The wide 5V-28V supply range tolerates cold-crank dips on 12V systems while ±40V bus fault tolerance handles jump-start transients. The exposed pad of the VQFN-24 (RGY) provides adequate thermal dissipation for the modest bus-driver load.
Recommended
Recommended Products Summary
Engineering reference data for TLIN1124A-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLIN1124ARGYRQ1 | TLIN1124ARGYR | TLIN2024A-Q1 | TJA1124AHG |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Package | VQFN-24 (RGY) 5.5x3.5 mm | VQFN-24 (RGY) - same | VQFN-24 (RGY) - same | VQFN-24 (RGY) - same | VQFN (similar body) - same |
| LIN Channels | 4 | 4 | 4 | 4 | 4 |
| Supply Voltage | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V | 5 V to 28 V |
| LIN Bus Fault Tolerance | ±40 V | ±40 V | ±40 V | ±45 V | ±40 V |
| AEC-Q100 Grade | Grade 1 (-40C to +125C) | Grade 1 | Not automotive | Grade 1 | Grade 1 |
| Integrated Commander Pull-up | Yes (diode + resistor) | Yes | Yes | Yes | Yes |
| Price (1k qty) | $1.82 (estimated) | $1.82 (estimated, same die) | Lower (no AEC-Q100, ~$1.60 estimated) | Slightly higher (new gen, ~$1.95 estimated) | $1.25 (per NXP budgetary quote) |
Key Differentiators
- Quad-channel integration with integrated commander pull-ups (vs Single-channel TLIN1024A-Q1)
- AEC-Q100 Grade 1 qualification and ±40V bus fault tolerance (vs NXP TJA1124AHG)
- 100 kbps high-speed receiver for end-of-line programming (vs TJA1124AHG)
Design Notes
Estimated: route the four LIN bus traces as short, symmetric, parallel traces and keep them at least 3 mm away from any switching DC/DC or motor-drive traces. Place a 100 nF X7R ceramic bypass capacitor within 2 mm of the VCC pin and a 4.7 uF bulk capacitor on the battery rail close to the connector. The exposed thermal pad of the VQFN-24 (RGY) must be soldered to a continuous ground copper pour of at least 100 mm^2 to keep junction temperature within the AEC-Q100 envelope during sustained LIN-dominant events at maximum data rate.
The TLIN1124A-Q1 uses a wave-shaping driver specifically designed to minimize EME and meet CISPR 25 radiated emissions limits, but the LIN cable harness is an efficient antenna and poor layout can negate the on-chip slope control. Use twisted-pair wiring from the connector to the IC, add a ferrite bead on each LIN trace near the connector, and avoid sharp 90-degree bends in the LIN traces. Keep the LIN traces on an outer PCB layer if possible, and reference them to a continuous ground plane on the layer below.
Estimating derating margin: at maximum data rate and a VCC of 16 V (24V system after a load-dump transient), the LIN-dominant power dissipation can reach ~250 mW per channel. Across all four channels this can exceed 1 W, so verify the thermal rise against the PCB copper area. Also avoid leaving the INH pin floating - tie it to the system LDO EN or to a defined logic level to ensure predictable standby behavior. Finally, do not assume the 100 kbps receiver rate applies to bus transmission; transmission remains 20 kbps per LIN spec.
Even though the TLIN1124A-Q1 tolerates ±40V on the LIN bus, always add an SMAJ33CA or similar TVS diode from LIN to GND, close to the connector, to dissipate bulk transient energy outside the IC. Place a PTC fuse or series resistor on the battery feed to the VCC pin to limit inrush during reverse-battery events. Follow OEM-specific EMC test plans (e.g. ISO 7637-2 pulses 1, 2a, 3a/3b) on first prototype builds.
Compliance Information
AEC-Q100 Grade 1 qualified per TI product page - supporting temperature range -40C to +125C for under-hood and cabin automotive ECUs. RoHS and lead-free confirmed via TI product information; halogen-free status not explicitly listed in the retrieved data and marked as [DATA_NEEDED].
