COM20022I3V-HD SMSC, COM20022I3V-HD Datasheet - Page 9

• 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
PIN NO
18,23,
32,43
30,41
19,27
8,20,
6,11,
38
40
24
25
28
29
21
22
Terminal
Count
Refresh
Execution
nPulse 1
nPulse 2
Receive In
nTransmit
Enable
Crystal
Oscillator
Power
Supply
Ground
N/C
NAME
N/C
TC
nREFEX
nPULSE1
nPULSE2
RXIN
nTXEN
XTAL1
XTAL2
VDD
VSS
SYMBOL
TRANSMISSION MEDIA INTERFACE
DATASHEET
PWR
PWR
OUT
OUT
OUT
I/O
I/O
IN
IN
IN
IN
Page 9
Terminal Count signal. Active polarity is
programmable. Default is active high. When
BUSTMG is High, this signal is connected to the
internal pull-up resistor.
Refresh execution signal. Falling edge detection.
This signal is connected to the internal pull-up
resistor.
In Normal Mode, these active low signals carry the
transmit data information, encoded in pulse format as
DIPULSE waveform. In Backplane Mode, the
nPULSE1 signal driver is programmable (push/pull or
open-drain), while the nPULSE2 signal provides a
clock with frequency of doubled data rate. nPULSE1
is connected to a weak internal pull-up resistor on
the open/drain driver in backplane mode.
This signal carries the receive data information from
the line transceiver.
Transmission Enable signal. Active polarity is
programmable through the nPULSE2 pin.
nPULSE2 floating before power-up;
nTXEN active low
nPULSE2 grounded before power-up;
nTXEN active high (this option is only available in
Back Plane mode)
An external crystal should be connected to these
pins. Oscillation frequency range is from 10 MHz to
20 MHz. If an external TTL clock is used instead, it
must be connected to XTAL1 with a 390ohm pull-up
resistor, and XTAL2 should be left floating.
+5 Volt power supply pins.
Ground pins.
Non-connection
DESCRIPTION
Revision 02-27-06