Rainbow Electronics T89C51CC02 - Manual (Page 130)

130 Rev.A - May 17, 2001
Preliminary
T89C51CC02
19.2. DC Parameters for Standard Voltage
T A = -40
°
C to +85
°
C; V
SS
= 0 V; V
CC
= 5 V
±
10%; F = 0 to 40 MHz.
Table 25. DC Parameters in Standard Voltage
NOTES
1.
Operating I
CC
is measured with all output pins disconnected; XTAL1 driven with T
CLCH
, T
CHCL
= 5 ns (see Figure 136.), V
IL
= V
SS
+ 0.5 V,
V
IH
= V
CC
- 0.5V; XTAL2 N.C.; RST = V
CC
. I
CC
would be slightly higher if a crystal oscillator used (see Figure 133.).
2. Idle I
CC
is measured with all output pins disconnected; XTAL1 driven with T
CLCH
, T
CHCL
= 5 ns, V
IL
= V
SS
+ 0.5 V, V
IH
= V
CC
- 0.5 V; XTAL2
N.C; RST = V
SS
(see Figure 134.).
3. Power Down I
CC
is measured with all output pins disconnected; ; XTAL2 NC.; RST = V
SS
(see Figure 135.). In addition, the WDT must be
inactive and the POF flag must be set.
4.
Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the V
OL
s of ALE and Ports 1 and 3. The noise is
due to external bus capacitance discharging into the Port 0 and Port 2 pins when these pins make 1 to 0 transitions during bus operation. In the worst
cases (capacitive loading 100pF), the noise pulse on the ALE line may exceed 0.45V with maxi V
OL
peak 0.6V. A Schmitt Trigger use is not necessary.
5. Typicals are based on a limited number of samples and are not guaranteed. The values listed are at room temperature..
6. Under steady state (non-transient) conditions, I
OL
must be externally limited as follows:
Maximum I
OL
per port pin: 10 mA
Maximum I
OL
per 8-bit port:
Ports 1, 2 and 3: 15 mA
Maximum total I
OL
for all output pins: 71 mA
If I
OL
exceeds the test condition, V
OL
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions.
Symbol Parameter Min Typ Max Unit Test Conditions
V
IL
Input Low Voltage -0.5 0.7 (7) V
V
IH
Input High Voltage except XTAL1, RST 0.2 V
CC
+ 0.9 V
CC
+ 0.5 V
V
IH1
Input High Voltage, XTAL1, RST 0.7 V
CC
V
CC
+ 0.5 V
V
OL Output Low Voltage, ports 1, 2, 3 and 4 (6) 0.3
0.45
1.0
V
V
V
I
OL
= 100
µ
A (4)
I
OL
= 1.6 mA
(4)
I
OL
= 3.5 mA (4)
V
OH
Output High Voltage, ports 1, 2, 3, 4 and 5 V
CC
- 0.3
V
CC
- 0.7
V
CC
- 1.5
V
V
V
I
OH
= -10
µ
A
I
OH
= -30
µ
A
I
OH
= -60
µ
A
V
CC
= 5 V
±
10%
R
RST
RST Pulldown Resistor 20 40 (5) 200 k
Ω
I
IL
Logical 0 Input Current ports 1, 2, 3 and 4 -50
µ
A Vin = 0.45 V
I
LI
Input Leakage Current
±
10
µ
A 0.45 V < Vin < V
CC
I
TL
Logical 1 to 0 Transition Current, ports 1, 2, 3
and 4 -650
µ
A Vin = 2.0 V
C
IO
Capacitance of I/O Buffer 10 pF Fc = 1 MHz
T
A = 25
°
C
I
PD
Power Down Current 120 350
µ
A 4.5 V < V
CC <
5.5 V (3)
I
CC
Power Supply Current (Typical)
I
CCOP
= 0.5 Freq (MHz) + 3 mA
I
CCIDLE
= 0.3 Freq (MHz) + 2 mA