U2480B
Automotive Lamp Outage Monitor
Description
The IC U2480B is designed for individual monitoring of
11 lamps in automobiles. Three double comparators and
five single comparators, which can be optionally inter-
connected, permit realization of many monitoring
variants. An integrated latch is available to memorize the
outage of indicator or brake lamps.
Features
D
10 mV comparator thresholds
D
Temperature compensated
D
Voltage characteristic of the lamps is taken into
D
D
account
Input voltage range up to 23 V independent of supply
Typical input currents 25
m
A, so that protective
resistors can be connected in series
D
Internal protection measures for pulses
according to ISO TR 7637/1
D
ESD according to MIL-SID-883 C test method 3015.7
– Human body model:
4 kV
– Machine model:
200 V
EMI protection (TEM cell up to 100 V/m)
Ordering Information
Extended Type Number
U2480B
Package
SDIP28
Remarks
Block Diagram
V
Batt
3 double
comparators
5 single
comparators
Stabili–
zation
V
Stab
Logic / Timing
Latch
Output
stage
Oscillator
OSC
V
S
GND
Pilot lamp
V
Stab
13945
TELEFUNKEN Semiconductors
Rev. A1, 22-Oct-97
1 (8)
TEMIC [ TEMIC SEMICONDUCTORS ]
