Filter
Top Products
3
controller optimized for use in industrial and
automotive applications. Using an ARCNET
protocol engine is the ideal solution for factory
automation applications because it provides a
token-passing protocol, a highly reliable and
proven networking scheme, and a data rate of
up to 2.5 Mbps when using the COM20020.
A token-passing protocol provides predictable
response times because each network event
occurs within a predetermined time interval,
based upon the number of nodes on the
network. The deterministic nature of ARCNET
is essential in mission critical applications.
The integration of the 2Kx8 RAM buffer on-chip,
the Command Chaining feature, the 2.5 Mbps
maximum data rate, and the internal diagnostics
make the COM20020 the highest performance
industrial communications device available.
With only one COM20020 and one
microcontroller, a complete communications
node may be implemented.
ARCNET is a registered trademark of Datapoint Corporation
PIN CONFIGURATION
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
A0/nMUX
A1
A2/ALE
AD0
AD1
AD2
D3
D4
D5
D6
D7
nRD/nDS
nWR/DIR
nCS
nINTR
nRESET IN
nTXEN
RXIN
nPULSE2
nPULSE1
XTAL2
XTAL1
VDD
26
27
28
1
2
3
4
18
17
16
15
14
13
12
25 24 23 22 21 20 19
5 6 7 8 9 10 11
n
C
S
n
I
N
T
R
n
R
E
S
E
T
I
N
V
S
S
n
T
X
E
N
R
X
I
N
n
P
U
L
S
E
2
A
D
1
V
S
S
A
D
2
D
3
D
4
D
5
D
6
nPULSE 1
XTAL2
XTAL1
VDD
VSS
N/C
D7
nWR/DIR
nRD/nDS
VDD
A2/ALE
AD0
A1
Packages: 24-Pin DIP or 28-Pin PLCC
Ordering Information:
COM20020 P
VSS
A0/nMUX
PACKAGE TYPE: P = Plastic, LJP = PLCC
TEMP RANGE: (Blank) = Commercial: 0°C to +70°C
I = Industrial: -40°C to +85°C
DEVICE TYPE: 20020 = Universal Local Area Network Controller
(with 2K x 8 RAM)