COM20022I-HT Standard Microsystems (SMSC), COM20022I-HT Datasheet - Page 73

• 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
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
oscillation after V
4
XTL
DR
and t
nRESET Pulse Width***
nINTR High to Next nINTR Low
4.0V
Input Clock High Time
Input Clock Low Time
Input Clock Period*
Input Clock Frequency*
Frequency Accuracy*
is period of Data Rate (i.e. at 2.5 Mbps, T
is period of external XTAL oscillation frequency.
5
are applied to crystal oscillaton.
Parameter
Parameter
Figure 8.15
DD
t1
t1
Figure 8.16
was over 4.5V.
1.0V
DATASHEET
- TTL Input Timing on XTAL1 Pin
- Reset and Interrupt Timing
t2
EF = 0
EF = 1
+ -
Page 73
t2
DR
= 400 nS)
min
-200
T
5T
t3
20
20
50
10
4T
DR
min
XTL
**/2
XTL
*
*
typ
typ
100
max
200
20
max
50% of V
units
MHz
ppm
nS
nS
nS
units
DD
Revision 09-27-07