enc28j60 Microchip Technology Inc., enc28j60 Datasheet - Page 83

• Manufacturer Part Number: enc28j60
• Description: Stand-alone Ethernet Controller With Spi Interface
• Manufacturer: Microchip Technology Inc.

TABLE 16-1:
TABLE 16-2:
TABLE 16-3:
TABLE 16-4:
TABLE 16-5:
© 2006 Microchip Technology Inc.
Note 1:
RX Transformer Turns Ratio
TX Transformer Turns Ratio
Insertion Loss
Primary Inductance
Transformer Isolation
Differential to Common Mode Rejection
Return Loss
AC CHARACTERISTICS
Param.
Param.
Param.
No.
No.
No.
F
T
T
trl
t
t
t
t
t
RSTLOW
h CLKOUT
l CLKOUT
r CLKOUT
f CLKOUT
CLKOUT prescaler is set to divide by one.
OSC
OSC
DUTY
f
Sym
Sym
Sym
Parameter
AC CHARACTERISTICS: ENC28J60 (INDUSTRIAL AND COMMERCIAL)
OSCILLATOR TIMING CHARACTERISTICS
RESET AC CHARACTERISTICS
CLKOUT PIN AC CHARACTERISTICS
REQUIREMENTS FOR EXTERNAL MAGNETICS
Clock In Frequency
Clock In Period
Duty Cycle
(external clock input)
Clock Tolerance
RESET Pin High Time
(between Reset events)
RESET Pin Low Time to
trigger Reset
CLKOUT Pin High Time
CLKOUT Pin Low Time
CLKOUT Pin Rise Time
CLKOUT Pin Fall Time
Characteristic
Characteristic
Characteristic
Min
350
0.0
-16
40
—
—
—
Standard Operating Conditions
-40°C
Preliminary
0°C
Norm
1:1
1:1
0.6
1.5
16.5
16.5
Min
Min
400
Min
—
—
—
25
40
40
—
—
—
2
T
T
A
A
+70°C, 3.10V
+85°C, 3.10V
Max
1.1
—
—
—
—
—
—
Max
Max
Max
25
40
60
—
—
—
—
50
3
4
Units
Units
Units
Units
dB
dB
dB
kV
—
—
MHz
ppm
H
ns
ns
ns
ns
ns
ns
%
V
V
s
DD
DD
Transformer Center Tap = 3.3V
8 mA bias
0.1 to 10 MHz
T
T
Measured from 0.1 V
0.9 V
Measured from 0.9 V
0.1 V
3.60V (Commercial)
3.60V (Industrial)
DUTY
DUTY
DD
DD
ENC28J60
= 50% (Note 1)
= 50% (Note 1)
, Load = 10 pF (Note 1)
, Load = 10 pF (Note 1)
Conditions
Conditions
Conditions
Conditions
DS39662B-page 81
DD
DD
to
to