COM20022I-HT Standard Microsystems (SMSC), COM20022I-HT Datasheet - Page 17

• Manufacturer Part Number: COM20022I-HT
• Manufacturer: Standard Microsystems (SMSC)

Specifications of COM20022I-HT

• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Compliant

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Chip RAM
Datasheet
SMSC COM20022I
nPULSE1
nPULSE2
TXEN
RXIN
GND
Figure 5.1
8051
BACKPLANE CONFIGURATION
AD0-AD7
RESET
XTAL1
XTAL2
nINT1
ALE
A15
- Multiplexed, 8051-Like Bus Interface with RS-485 Interface
FIGURE A
nWR
nRD
DATASHEET
A0/nMUX
AD0-AD2, D3-D7
A2/BALE
nRESET
nRD/nDS
nWR/DIR
27 pF
nCS
nINTR
+5V
100 Ohm
Page 17
XTAL1
COM2002I
20 MHz
XTAL
nPULSE1
XTAL2
NOTE: COM20022I must be in backplane
RXIN
nPULSE1
nPULSE2
nTXEN
RXIN
GND
27 pF
FIGURE B
Differential Driver
Configuration
*
Media Interface
with Figure A, B or C.
may be replaced
+5V
+5V
75176B or
Equiv.
2
6
7
3
2
6
7
2 Fiber Interface
(ST Connectors)
HFD3212-002
HFE4211-014
Transmitter
Receiver
Revision 09-27-07