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