T89C51RD2-3CBC-L ATMEL [ATMEL Corporation], T89C51RD2-3CBC-L Datasheet - Page 73

• Manufacturer Part Number: T89C51RD2-3CBC-L
• Description: 0 to 40MHz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL [ATMEL Corporation]

T89C51RD2
9.4. DC Parameters for Low Voltage
T
T
NOTES
1.
V
2.
N.C; Port 0 = V
3.
the WDT must be inactive and the POF flag must be set.
4.
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
5.
6.
If I
73
IH
A
A
Symbol
OL
I
CCIDLE
I
V
V
R
= V
V
V
= 0 C to +70 C; V
= -40 C to +85 C; V
V
CIO
CCOP
V
V
Operating I
Idle I
Power Down I
Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the V
Typicals are based on a limited number of samples and are not guaranteed. The values listed are at room temperature..
Under steady state (non-transient) conditions, I
Maximum I
Maximum I
Port 0: 26 mA
Ports 1, 2 and 3: 15 mA
Maximum total I
I
I
I
I
exceeds the test condition, V
OH1
OL1
RST
PD
TL
IH1
OH
IL
LI
OL
IH
IL
CC
CC
- 0.5V; XTAL2 N.C.; EA = RST = Port 0 = V
is measured with all output pins disconnected; XTAL1 driven with T
Input Low Voltage
Input High Voltage except XTAL1, RST
Input High Voltage, XTAL1, RST
Output Low Voltage, ports 1, 2, 3, 4 and 5
Output Low Voltage, port 0, ALE, PSEN
Output High Voltage, ports 1, 2, 3, 4 and 5
Output High Voltage, port 0, ALE, PSEN
Logical 0 Input Current ports 1, 2, 3, 4 and 5
Input Leakage Current
Logical 1 to 0 Transition Current, ports 1, 2, 3,
4 and 5
RST Pulldown Resistor
Capacitance of I/O Buffer
Power Down Current
Power Supply Current on normal mode
Power Supply Current on idle mode
CC
OL
OL
CC
; EA = RST = V
CC
per port pin: 10 mA
per 8-bit port:
is measured with all output pins disconnected; XTAL1 driven with T
OL
is measured with all output pins disconnected; EA = V
for all output pins: 71 mA
SS
Parameter
SS
OL
= 0 V; V
SS
may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions.
= 0 V; V
(see Figure 25.).
Table 37. DC Parameters for Low Voltage
CC
CC
= 2.7 V to 3.6 V; F = 0 to 25 MHz.
OL
= 2.7 V to 3.6 V; F = 0 to 25 MHz.
CC
must be externally limited as follows:
(6)
(6)
. I
CC
would be slightly higher if a crystal oscillator used (see Figure 24.).
0.2 V
0.7 V
0.9 V
0.9 V
Min
-0.5
CC
50
CC
CC
CC
+ 0.9
SS
, PORT 0 = V
CLCH
Typ
90
, T
1
CLCH
(5)
CHCL
CC
, T
; XTAL2 NC.; RST = V
= 5 ns, V
OL
(MHz) + 3 mA
(MHz) + 2 mA
0.2 V
CHCL
V
V
peak 0.6V. A Schmitt Trigger use is not necessary.
0.6 Freq
0.3 Freq
CC
CC
Max
0.45
0.45
-650
200
-50
CC
10
50
= 5 ns (see Figure 27.), V
10
+ 0.5
+ 0.5
IL
OL
- 0.1
= V
s of ALE and Ports 1 and 3. The noise is
SS
Rev. F - 15 February, 2001
+ 0.5 V, V
Unit
mA
mA
k
pF
V
V
V
V
V
V
V
A
A
A
A
SS
(see Figure 26.). In addition,
I
I
I
I
Vin = 0.45 V
0.45 V < Vin < V
Vin = 2.0 V
Fc = 1 MHz
T
V
V
V
IH
OL
OL
OH
OH
A
CC
CC
CC
Test Conditions
= V
= 25 C
= 0.8 mA
= 1.6 mA
= -10 A
= -40 A
= 2.7 V to 3.6 V
= 3.6 V
= 3.6 V
IL
CC
= V
- 0.5 V; XTAL2
SS
(1)
(2)
(4)
(4)
+ 0.5 V,
CC
(3)