COM20020I-DZD-TR Standard Microsystems (SMSC), COM20020I-DZD-TR Datasheet - Page 65

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

Specifications of COM20020I-DZD-TR

• 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
• Pin Count: 28
• Lead Free Status / RoHS Status: Compliant

5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
Datasheet
SMSC COM20020I Rev D
nRESET
Note*: T
Note**: T
Note***: When the power is turned on, t1 is measured from stable XTAL
XTAL1
Note*: Input clock frequency must be 20 MHz ( 100ppm or better) to use the internal Clock Multiplier.
t1
t2
t5
t1
t2
t3
t4
nINTR
t
5
oscillation after V
XTL
DR
4.0V
is applied to crystal oscillaton.
Input Clock High Time
Input Clock Low Time
Input Clock Period
Input Clock Frequency
Frequency Accuracy*
nRESET Pulse Width***
nINTR High to Next nINTR Low
is period of Data Rate (i.e. at 2.5 Mbps, T
is period of external XTAL oscillation frequency.
Parameter
Parameter
Figure 8.13 - TTL Input Timing on XTAL1 Pin
DD
t1
t1
Figure 8.14 - Reset and Interrupt Timing
was over 4.5V.
1.0V
DATASHEET
t2
EF = 0
EF = 1
+ -
Page 65
t2
DR
= 400 nS)
-200
min
T
10
10
25
10
5T
t3
4T
DR
min
XTL
**/2
XTL
*
*
typ
typ
100
max
200
40
max
50% of V
units
MHz
ppm
nS
nS
nS
units
DD
Revision 12-05-06