COM20022I3V-HD SMSC, COM20022I3V-HD Datasheet - Page 27

• Manufacturer Part Number: COM20022I3V-HD
• Description: Network Controller & Processor ICs ARCNET Contrllr
• Manufacturer: SMSC

Specifications of COM20022I3V-HD

• Data Rate: 10 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM
Datasheet
SMSC COM20022I 3V
75176B or
Equiv.
RT
20MHZ
CLOCK
(FOR REF.
ONLY)
nPULSE1
nPULSE2
DIPULSE
RXIN
In typical applications, the serial backplane is terminated at both ends and a bias is provided by the
external pull-up resistor.
The RXIN signal is directly connected to the cable via an internal Schmitt trigger. A negative pulse on this
input indicates a logic "1". Lack of pulse indicates a logic "0". For typical single-ended backplane
applications, RXIN is connected to nPULSE1 to make the serial backplane data line. A ground line (from
the coax or twisted pair) should run in parallel with the signal. For applications requiring different treatment
of the receive signal (like filtering or squelching), nPULSE1 and RXIN remain as independent pins.
Figure 5.8
COM20022I 3V
- COM20022I 3V Network Using RS-485 Differential Transceivers
100ns
200ns
Figure 5.9
100ns
400ns
1
- Dipluse Waveform for Data of 1-1-0
RBIAS
+VCC
DATASHEET
COM20022I 3V
Page 27
+VCC
1
RBIAS
COM20022I 3V
+VCC
0
RBIAS
Revision 02-27-06
RT