Overview
The L9613B, produced by STMicroelectronics, is a monolithic integrated circuit designed to provide standard ISO 9141 compatible interface functions. This device is specifically tailored for automotive applications, offering a bidirectional serial communication link. It features a bidirectional I/O pin (K) connected to the vehicle battery (VBat) related diagnosis bus and a separate comparator (L) that can also be linked to the VBat bus. The L9613B is known for its robustness, low power consumption, and high efficiency in automotive bus systems.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (VS) | -24 | - | 36 (40V for transients) | V |
| Stabilized Voltage Supply (VCC) | -24 | - | 7 | V |
| Supply Voltage Transient (ΔVS/dt) | -10 | - | 10 | V/µs |
| Pin Voltage (VLI, K, VLO, RX, TX) | -24 | - | VS or VCC | V |
| Temperature Shutdown Switch On Threshold (TJSDon) | 160 | 200 | - | °C |
| Temperature Shutdown Switch Off Threshold (TJSDoff) | 150 | 200 | - | °C |
| Thermal Steady State Junction to Ambient Resistance (Rth j-amb) | 130 | 155 | 180 | °C/W |
| Supply Current (ICC) at VCC ≤ 5.5V | 1.4 | 2.3 | - | mA |
| Standby Current (ISSB) at VCC ≤ 0.5V | - | - | 1 | mA |
| Baud Rate according to ISO9141 | ≥130 | - | - | kBaud |
Key Features
- Operating power supply voltage range: 4.8V ≤ VS ≤ 36V (40V for transients)
- Reverse supply (battery) protection down to VS ≥ -24V
- Standby mode with very low current consumption: ISSB ≤ 1mA @ VCC ≤ 0.5V
- Minimum possible Baud rate according to ISO9141: ≥ 130 kBaud
- Low quiescent current in off condition: ISOFF = 120µA
- TTL compatible TX input
- Bidirectional K-I/O pin with supply voltage dependent input threshold
- Over temperature shutdown function selective to K-I/O pin
- Wide input and output voltage range: -24V ≤ VK ≤ VS
- K output current limitation: typ. IK = 60mA
- Defined OFF output status in under voltage 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 L9613B is primarily designed for automotive applications, particularly for vehicle diagnosis and communication systems. It is used in various automotive electronic control units (ECUs) to facilitate bidirectional serial communication over the vehicle's battery-related diagnosis bus. Its robust features and compliance with ISO 9141 standards make it suitable for a wide range of automotive communication needs.
Q & A
- What is the operating power supply voltage range of the L9613B?
The operating power supply voltage range is 4.8V ≤ VS ≤ 36V, with transient voltages up to 40V.
- What is the minimum possible Baud rate according to ISO9141 for the L9613B?
The minimum possible Baud rate is ≥ 130 kBaud.
- How does the L9613B protect against reverse battery conditions?
The device is protected against reverse battery conditions down to VS ≥ -24V.
- What is the current consumption in standby mode for the L9613B?
The standby current consumption is ISSB ≤ 1mA @ VCC ≤ 0.5V.
- What is the thermal shutdown threshold for the K output?
The thermal shutdown switch-on threshold is TJSDon = 160°C to 200°C.
- Does the L9613B have integrated pull-up resistors?
Yes, the device has integrated pull-up resistors for TX, RX, and LO.
- How does the L9613B handle over-temperature conditions?
The device has an over-temperature shutdown function selective to the K-I/O pin.
- What is the typical K output current limitation for the L9613B?
The typical K output current limitation is IK = 60mA.
- Is the L9613B EMI robust?
Yes, the device is optimized for EMI robustness.
- What are the package options for the L9613B?
The device is available in SO8 packages, either in tubes or on tape and reel.
