Overview: 2470 BUS DRIVER / RECEIVER 2470
BUS DRIVER / RECEIVER
The ULQ2470L and ULQ2470M are bi-directional bus driver / receivers designed specifically for automotive applications. They are intended to be used as an interface between a microprocessor and a single-wire multiplex data bus operating from the A-line or battery. Each device consists of a wave-shaped open-collector driver, a pull-up resistor, and an input filter and buffer. Output driver protection circuitry provides output shutdown if currents in excess of 25 to 30 mA occur. Additionally, over-voltage shutdown occurs when the bus voltage exceeds approximately 22 volts. Data Sheet 27463 ULQ2470M
VCC VS REXT BUS Rd Rd Td GND 1 2 3 4 8 7 6 5 FUNCTIONAL BLOCK DIAGRAM
Dwg. PP-061 Note that the ULQ2470M (DIP) and the ULQ2470L (SOIC) are electrically identical and share a mon terminal number assignment. ABSOLUTE MAXIMUM RATINGS at T A = 25°C Bus Supply Voltage Range, (VBAT) ......................... -13.5 V to 27 V Logic Supply Voltage Range, (VCC) ............................ -0.3 V to 9.0 V Input Voltage Range, (VBUS ) ........................... -3.0 V to 24 V Operating Temperature Range, TA ............................... -40°C to +85°C Junction Temperature Range, TJ ................................ -40°C to 150°C Storage Temperature Range, TS ................................ -65°C to 150°C D C E N U E N R I E T F N E O R C R S I O F D
Rd
1 T C U D Y L O N R P EO
8 VCC 7 VS 22 kΩ 6 REXT BUS Rd 2 12 Ω 5 Td 3 CURRENT LIMIT 28 V 25 Ω 4 GND
Dwg.
