CS212
CS212
Security Detector
Serial-Addressable Receiver/Transmitter
Description
The S-ART is a 16 pin circuit
designed for data transmission on a
two-lead cable. The circuit is spe-
cially developed for alarm systems
where it is desired to identify each
detector individually. There can be
up to 30 S-ART circuits/detectors
on the same 2-lead cable. This cable
transmits both DC supply to the
S-ART and information to/from the
S-ART.
The S-ART works on the principle
by which an address is sent on the
line cable and the S-ART which rec-
ognizes the address then carries out
the order which can, in principle, be
two things:
1. Transmit data from the line cable
to the S-ART's two outputs OUT0
and OUT1.
2. Answer the S-ART controller
with the condition of the 2 inputs
IN0 and IN1 or IN2-3.
The line signal is divided into 3 lev-
els in order to give a time signal for
synchronizing and a data signal
containing addresses, orders etc.
Typical signal levels for the three
levels would be 15V, 7.5V and 0V.
Features
s
Receives/Transmits Data
on Only Two Leads
s
Low Current Consumption
s
High Noise Immunity
s
Sabotage Surveilled Loop
Input
Block Diagram
Package Options
16L PDIP & 16L SO Wide
A method by
which, in principle,
the system can be
extended to an
infinite number of
S-ART is shown on
the block diagram.
The controller
scans the in/out-
puts of a number
of lines, each with
a maximum of 30
S-ARTs.
Line 1
S-ART
OUT0
1
Controller
Line N
16
15
14
13
12
11
10
9
OUT1
DSR
IN2
IN3
V
DD
DATA
OUT
Gnd
LINE
A4
2
A3
3
A2
4
A1
5
A0
6
IN1
7
IN0
8
V
CK "1"
DATA "1"
DATA "0"
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
Rev. 4/21/99
1
A
¨
Company
CHERRY [ CHERRY SEMICONDUCTOR CORPORATION ]
