COM20020I-HD Standard Microsystems (SMSC), COM20020I-HD Datasheet - Page 19

• Manufacturer Part Number: COM20020I-HD
• Manufacturer: Standard Microsystems (SMSC)

Specifications of COM20020I-HD

• Number Of Transceivers: 1
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Datasheet
SMSC COM20020I Rev D
Figure 5.2 – Non-Multiplexed, 6801-Like Bus Interface with RS-485 Interface
6801
XTAL1
XTAL2
D0-D7
nIRQ1
nRES
R/nW
nIOS
A0
A1
A2
A7
nPULSE1
nPULSE2
nTXEN
RXIN
GND
N/C
DATASHEET
RXIN
nPULSE1
nPULSE2
4, 13, 14
17, 19,
HYC9068 or
HYC9088
0.47
nRD/nDS
27 pF
uF
nCS
nRESET
nWR/nDIR
D0-D7
A0/nMUX
A1
A2/BALE
nINTR
FIGURE C
Page 19
XTAL1
+
COM20020ID
10
6
uF
3
20MHz
XTAL
+5V
-5V
11
12
XTAL2
10
uF
*Valid for 2.5 Mbps only.
Traditional Hybrid
+
1/2W
5.6K
1/2W
5.6K
nPULSE1
nPULSE2
Configuration
TXEN
RXIN
27 pF
GND
0.47
uF
Differential Driver
Configuration
0.01 uF
1KV
*
Media Interface
may be replaced
with Figure A, B or C.
75176B or
Equiv.
Revision 12-05-06