TA = -40°C to +85°C; VSS = 0V;
VCC =2.7V to 5.5V and F = 0 to 40 MHz (both internal and external code execution)
VCC =4.5V to 5.5V and F = 0 to 60 MHz (internal code execution only) (Continued)
Symbol Parameter
Min
Typ
Max
Unit Test Conditions
VCC = 5V 10%
VCC - 0.3
VCC - 0.7
VCC - 1.5
V
V
V
IOH = -200 μA
IOH = -3.2 mA
IOH = -7.0 mA
VOH1
Output High Voltage, port 0, ALE, PSEN
VCC = 2.7V to 5.5V
0.9 VCC
50
V
IOH = -10 μA
RRST
IIL
RST Pulldown Resistor
200(5)
250
-50
10
kΩ
Logical 0 Input Current ports 1, 2, 3, 4 and 5
Input Leakage Current for P0 only
Logical 1 to 0 Transition Current, ports 1, 2, 3, 4
μA VIN = 0.45V
ILI
μA 0.45V < VIN < VCC
μA VIN = 2.0V
ITL
-650
Fc = 3 MHz
pF
CIO
Capacitance of I/O Buffer
10
TA = 25°C
IPD
Power Down Current
100
150
μA 4.5V < VCC < 5.5V(3)
mA VCC = 5.5V(1)
ICCOP
ICCIDLE
Power Supply Current on normal mode
Power Supply Current on idle mode
0.4 x Frequency (MHz) + 5
0.3 x Frequency (MHz) + 5
mA VCC = 5.5V(1)
0.4 x
Frequency
(MHz) + 20
ICCProg
Power Supply Current during flash Write / Erase
mA VCC = 5.5V(8)
Notes: 1. Operating ICC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns (see Figure 49.), VIL
=
V
V
SS + 0.5V,
IH = VCC - 0.5V; XTAL2 N.C.; EA = RST = Port 0 = VCC. ICC would be slightly higher if a crystal oscillator used (see Figure
46).
2. Idle ICC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns, VIL = VSS + 0.5V, VIH = VCC
0.5V; XTAL2 N.C; Port 0 = VCC; EA = RST = VSS (see Figure 47).
-
3. Power Down ICC is measured with all output pins disconnected; EA = VSS, PORT 0 = VCC; XTAL2 NC.; RST = VSS (see Fig-
ure 48).
4. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the VOLs 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 VOL peak 0.6V. A Schmitt Trigger use is not necessary.
5. Typical are based on a limited number of samples and are not guaranteed. The values listed are at room temperature and
5V.
6. Under steady state (non-transient) conditions, IOL must be externally limited as follows:
Maximum IOL per port pin: 10 mA
Maximum IOL per 8-bit port:
Port 0: 26 mA
Ports 1, 2 and 3: 15 mA
Maximum total IOL for all output pins: 71 mA
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test conditions.
7. For other values, please contact your sales office.
8. Icc Flash Write operation current while an on-chip flash page write is on going.
9. Flash Retention is guaranteed with the same formula for VCC Min down to 0.
108
AT89C51RB2/RC2
4180E–8051–10/06
ATMEL [ ATMEL ]
