High Performance Automotive Sonar Intrusion – Data Sheet
AS8412
Pin Description
AS8412
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
TX1
OSCIN
OSCOUT
VCAP
AVDD
AGND
RXGND
RX
SEL40K
ALEN
SENS0
SENS1
SAS
TP
VDD
GND
LED
WARN
ALARM
TX2
Description
40-kHz burst generator - output 1.
Clock input or crystal / ceramic resonator connection.
Crystal / ceramic resonator connection. Not connected when external clock is applied.
Pin for programming capacitor at the envelope detector.
Analog supply voltage (+5V).
Analog ground.
Analog ground.
Ultrasonic echo input.
Time reference select input (SEL40K=’1’ to select 40 kHz or SEL 40K=’0’ to select 400 kHz
at OSCIN).
Alarm enable input (when ALEN =’0’, the outputs ALARM, WARN and LED are disabled).
Sensitivity selection (least significant bit).
Sensitivity selection (most significant bit).
SAS enable input (SAS=’1’ activates Self-Adjusting Sensitivity, SAS=’0’ keeps sensitivity
fixed)
Test / reset pin. A rising edge resets the IC. This pin should be left unconnected or tied to
VDD for normal operation.
Digital supply voltage (+5V).
Digital ground
Active-low signalling LED output (open drain).
Active-low auxiliary alarm output (open drain).
Active-low main alarm output (open drain).
40-kHz burst generator - output 2.
Pinout & Packaging
Available Package(s):
•
•
20 pin DIP
20 pin SOIC
TX1
OSCIN
OSCOUT
VCAP
AVDD
AGND
RXGND
RX
SEL40K
ALEN
1
2
3
4
5
6
7
8
9
10
20 TX2
19 ALARM
18 WARN
17 LED
16 GND
15 VDD
14 TP
13 SAS
12 SENS1
11
SENS0
March 2001
Page 3 of 14
AMSCO [ AUSTRIAMICROSYSTEMS AG ]
