SN65HVD234-Q1

Part: SN65HVD235-Q1 (SN65HVD235QDRQ1) — Texas Instruments

Type: Automotive CAN Bus Transceiver

Description: 3.3 V, ISO 11898-2 compliant automotive CAN transceiver with bit rates up to 1 Mbps, ±36 V bus fault protection, and autobaud loopback mode (SN65HVD23x-Q1 family).

Operating Conditions:

• Supply voltage: 3–3.6 V
• Operating ambient temperature: -40 to 125 °C (AEC-Q100 Grade 1)
• Bus terminal voltage (common mode): -7 to 12 V
• Bit rate: up to 1 Mbps

Absolute Maximum Ratings:

• Max supply voltage (VCC): 7 V
• Voltage at any bus terminal (CANH, CANL): -36 to 36 V
• Input voltage (AB, EN, LBK, RS, TXD): -0.5 to 7 V
• Receiver output current: ±10 mA
• Max operating junction temperature: 150 °C
• Max storage temperature: 125 °C

Key Specs:

• Supply current, standby: 200 μA typ, 600 μA max (RS at VCC)
• Supply current, dominant/recessive: 6 mA typ (no load, RS at 0 V)
• Dominant differential output voltage: 1.5 V min, 2 V typ, 3 V max (TXD at 0 V, RS at 0 V)
• Receiver input thresholds: VIT+ 900 mV max; VIT- 500 mV min; hysteresis 100 mV typ
• Receiver output: VOH ≥ 0.8 × VCC at IO = -4 mA; VOL ≤ 0.4 V at IO = 4 mA
• Bus input capacitance: 40 pF typ (CANH or CANL to ground); differential 20 pF typ
• Average power dissipation: 36.4 mW typ (RL = 60 Ω, 1 MHz, VCC = 3.3 V, TA = 25 °C)
• Thermal resistance RθJA: 102.8 °C/W (SOIC-8)
• ESD HBM: ±12 kV (CANH/CANL to GND), ±3 kV (all pins); CDM ±1 kV

Features:

• Compatible with ISO 11898-2
• AEC-Q100 qualified, Temperature Grade 1
• Single 3.3 V supply; 5 V tolerant LVTTL I/Os
• Bus pin fault protection up to ±36 V
• Adjustable driver slew rate via RS pin resistor (about 15 V/μs at 10 kΩ, 2 V/μs at 100 kΩ)
• Low-current standby mode (200 μA typ)
• Autobaud loopback mode (AB pin) on the SN65HVD235-Q1
• Thermal shutdown protection
• Glitch-free power up/down on bus pins; unpowered node does not disturb the bus
• Supports up to 120 nodes

Applications:

• In-vehicle networking
• Advanced driver-assistance systems (ADAS)
• Body electronics and lighting
• Infotainment and cluster
• Hybrid, electric, and powertrain systems
• NMEA 2000 and SAE J1939 CAN applications

Package:

• SOIC (8), 4.90 mm × 3.91 mm

• 1 · Compatible With ISO 11898-2
• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
• -Device Temperature Grade 1: -40°C to 125°C Ambient Operating Temperature Range
• -Device HBM ESD Classification Levels
• -Bus Pins: ±12 000 V
• -Other Pins: ±3 000 V
• -Device CDM ESD Classification Level ±1 000 V
• Single 3.3-V Supply Voltage
• Bit Rates up to 1 Mbps
• Bus Pins Fault Protection up to ±36 V
• -7-V to 12-V Common-Mode Range
• High Input Impedance Allows for 120 Nodes
• LVTTL I/Os are 5-V Tolerant
• GIFT/ICT Compliant
• Adjustable Driver Slew Rates for Improved Emissions Performance
• Unpowered Node Does Not Disturb the Bus
• Low-Current Standby Mode, 200μ A (Typical)
• Average Power Dissipation: 36.4 mW
• SN65HVD233-Q1: Loopback Mode
• SN65HVD234-Q1: Ultralow-Current Sleep Mode -50-nA Typical Current Consumption
• SN65HVD235-Q1: Autobaud Loopback Mode
• Thermal Shutdown Protection
• Power Up and Down With Glitch-Free Bus Inputs and Outputs
• -High Input Impedance With Low VCC
• -Monotonic Output During Power Cycling

• In-Vehicle Networking
• Advanced Driver-Assistance Systems (ADAS)
• Body Electronics and Lighting
• Infotainment and Cluster
• Hybrid, Electric, and Powertrain Systems
• Applications in Accordance With CAN Bus Standards Such as NMEA 2000 and SAE J1939

1

Not to scale

over operating ambient temperature range (unless otherwise noted)

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over operating ambient temperature range unless otherwise noted (1)(2)

The CAN bus has two states during powered operation of the device, dominant and recessive . A dominant bus state is when the bus is driven differentially, corresponding to a logic low on the TXD and RXD pins. A recessive bus state is when the bus is biased to VCC / 2 via the high-resistance internal resistors RIN and RID of the receiver, corresponding to a logic high on the TXD and RXD pins. See Figure 35 and Figure 36 .

Figure 35. Bus States (Physical Bit Representation)

Figure 36. Simplified Recessive Common-Mode Bias and Receiver

These CAN transceivers are typically used in applications with a host microprocessor or FPGA that includes the link layer portion of the CAN protocol. The different nodes on the network are typically connected through the use of a 120Ω characteristic impedance twisted-pair cable with termination on both ends of the bus.

Figure 36. Simplified Recessive Common-Mode Bias and Receiver

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