2470 Ver la hoja de datos (PDF) - Allegro MicroSystems
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2470 Datasheet PDF : 4 Pages
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2470
2470 BUS DRIVER / RECEIVER
BUS DRIVER / RECEIVER
The ULQ2470L and ULQ2470M are bi-directional bus driver /
ULQ2470M
receivers designed specifically for automotive applications. They are
intended to be used as an interface between a microprocessor and a
Rd 1
T Rd 2
C Td 3
U GND 4
8 VCC
7 VS
6 REXT
5 BUS
ROD NLY Dwg.PP-061
P O Note that the ULQ2470M (DIP) and the ULQ2470L
(SOIC) are electrically identical and share a
D E common terminal number assignment.
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.
FUNCTIONAL BLOCK DIAGRAM
8 VCC
7 VS
Rd 1
22 kΩ
6
REXT
UE ENC Rd 2
BUS
5
12 Ω
TIN ER Td 3
ON REF ABSOLUTE MAXIMUM RATINGS
ISC R at TA = 25°C
Bus Supply Voltage Range,
O (VBAT) ......................... -13.5 V to 27 V
D F Logic Supply Voltage Range,
CURRENT
LIMIT
28 V
25 Ω
4 GND
Dwg. FP-039
— (VCC) ............................ -0.3 V to 9.0 V
Input Voltage Range,
FEATURES AND BENEFITS
s Over-Voltage Protection
(VBUS) ........................... -3.0 V to 24 V
s Diode Isolation from both Ground and Supply
Operating Temperature Range,
s Reverse-Battery Protection
TA ............................... -40°C to +85°C
Junction Temperature Range,
TJ ................................ -40°C to 150°C
Storage Temperature Range,
TS ................................ -65°C to 150°C
s Low Supply Current
s High Noise Immunity
s Output Current Limiting
s Low Standby Current—24 mA Max.
s Open-Ground Protection
s Under-Voltage Lockout
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