Overview
The STMicroelectronics L9637D013TR is a monolithic integrated circuit designed to provide bidirectional serial communication in automotive diagnostic applications, complying with the ISO 9141 interface standard. This device is part of the L9637 series and is packaged in an 8-pin SOIC (Small Outline Integrated Circuit) package. It operates over a wide supply voltage range and is optimized for use in On-Board Diagnostics (OBD) systems.
Key Specifications
| Attribute | Value |
|---|---|
| Data Rate | 50 kbps |
| Supply Voltage | 4.5 V to 36 V (40 V for transients) |
| ESD Voltage-Max | ±2 kV |
| Duplex | Half-Duplex |
| Function | Transceiver |
| No. of Drivers | 1 |
| No. of Receivers | 1 |
| Supply Current | 1.4 mA |
| Interface | ISO 9141 |
| Operating Temp Range | -40°C to +150°C |
| No of Terminals | 8 |
| Moisture Sensitivity Level | 3 |
| Package Style | SOIC-8 |
| Mounting Method | Surface Mount |
Key Features
- Operating power supply voltage range: 4.5 V ≤ VS ≤ 36 V (40 V for transients)
- Reverse supply (battery) protected down to VS ≥ -24 V
- Standby mode with very low current consumption: ISSB ≤ 1 mA @ VCC ≤ 0.5 V
- Low quiescent current in off condition: ISOFF = 120 µA
- TTL compatible TX input
- Bidirectional K-I/O pin with supply voltage dependent input threshold
- Overtemperature shut down function selective to K-I/O pin
- Wide input and output voltage range: -24 V ≤ VK ≤ VS
- K output current limitation, typ. IK = 60 mA
- Defined OFF output status in undervoltage condition and VS or GND interruption
- Controlled output slope for low EMI
- High input impedance for open VS or GND connection
- Defined output ON status of LO or RX for open LI or K inputs
- Defined K output OFF for TX input open
- Integrated pull up resistors for TX, RX, and LO
- EMI robustness optimized
Applications
The L9637D013TR is primarily used in automotive diagnostic applications, particularly in On-Board Diagnostics (OBD) systems that comply with the ISO 9141 protocol. It provides a bidirectional serial communication link, enabling communication between the vehicle's Electronic Control Units (ECUs) and diagnostic equipment.
Q & A
- What is the primary function of the L9637D013TR?
The L9637D013TR is a monolithic bus driver designed to provide bidirectional serial communication in automotive diagnostic applications, complying with the ISO 9141 interface standard. - What is the operating voltage range of the L9637D013TR?
The operating voltage range is 4.5 V to 36 V, with transient protection up to 40 V. - What is the maximum operating temperature of the L9637D013TR?
The maximum operating temperature is +150°C, and the minimum is -40°C. - What type of package does the L9637D013TR come in?
The L9637D013TR comes in an 8-pin SOIC (Small Outline Integrated Circuit) package. - What is the data rate supported by the L9637D013TR?
The data rate supported is 50 kbps. - Does the L9637D013TR have built-in ESD protection?
Yes, it has ESD protection up to ±2 kV. - What is the typical K output current limitation of the L9637D013TR?
The typical K output current limitation is 60 mA. - Does the L9637D013TR have integrated pull-up resistors?
Yes, it has integrated pull-up resistors for TX, RX, and LO. - What is the purpose of the overtemperature shut down function in the L9637D013TR?
The overtemperature shut down function is selective to the K-I/O pin and helps protect the device from overheating. - In what type of applications is the L9637D013TR commonly used?
The L9637D013TR is commonly used in automotive diagnostic applications, particularly in OBD systems.
