© 2005 Ubicom, Inc. All rights reserved.
- 40 -
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SX20AC/SX28AC
17.2 DC Characteristics
SX20/28AC at 0 - 75MHz (Temp Range: 0
°
C
<= Ta <= +70
°
C)
SX20/28AC at 0 - 50MHz (Temp Range: -40
°
C
<= Ta <= +85
°
C)
Note 1: V
dd
must start rising from V
ss
to ensure proper Power-On-Reset when relying on the internal Power-On-Reset
circuitry.
Note 2: Under conditions with half of the I/Os loaded to these I
oh
conditions, and half of the I/Os loaded to these
I
ol
conditions. Worst case I
oh
/I
ol
are typically double this if only one pin is loaded.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
V
dd
Supply Voltage (Note 1)
F
osc
= 0 - 32 MHz
F
osc
= 0 - 50 MHz
F
osc
= 0 - 75 MHz
2.7
3.0
4.5
-
-
-
5.5
5.5
5.5
V
V
V
S
Vdd
V
dd
rise rate (Note 1)
0.05
-
-
V/ms
I
dd
Supply Current, active
V
dd
= 5.0V, F
osc
= 75 MHz (External OSC)
V
dd
= 5.0V, F
osc
= 50 MHz (Crystal)
V
dd
= 5.0V, F
osc
= 4 MHz (Crystal)
V
dd
= 2.7V, F
osc
= 20 MHz (Crystal)
-
-
-
-
100
77
7.5
17
120
110
15
35
mA
mA
mA
mA
I
pd
Supply Current, power down
V
dd
= 3.0V, WDT enabled (before timeout)
V
dd
= 3.0V, WDT disabled
V
dd
= 4.5V, WDT enabled
V
dd
= 4.5V, WDT disabled
-
10
1.0
20
9.0
110
100
µA
µA
µA
µA
V
ih,
V
il
Input Levels
MCLR, OSC1, RTCC
Logic High
Logic Low
All Other Inputs
CMOS
Logic High
Logic Low
TTL (default after reset)
Logic High
Logic Low
0.9V
dd
V
ss
0.7V
dd
V
ss
2.0
V
ss
V
dd
0.1V
dd
V
dd
0.3V
dd
V
dd
0.8
V
V
V
V
V
V
I
il
Input Leakage Current,
RTCC Port A, B, C pins
OSC1, MCLR pins
V
in
= V
dd
or V
ss
, FUSE bit 6 = 0
-1.0
-30
+1.0
+30
µA
µA
I
ip
Weak Pullup Current
V
dd
= 5.5V, V
in
= 0V
V
dd
= 3.0V, V
in
= 0V
90
20
190
50
µA
µA
V
oh
Output High Voltage
Ports B, C
Port A
I
oh
= 10mA, V
dd
= 4.5V, Note 2
I
oh
= 8mA, V
dd
= 3.0V, Note 2
I
oh
= 20mA, V
dd
= 4.5V, Note 2
I
oh
= 15mA, V
dd
= 3.0V, Note 2
V
dd
-0.7
V
dd
-0.7
V
dd
-0.7
V
dd
-0.7
V
V
V
V
V
ol
Output Low Voltage
All Ports
I
ol
= 16mA, V
dd
= 4.5V, Note 2
I
ol
= 14mA, V
dd
= 3.0V, Note 2
0.6
0.6
V
V