AT89C51RC2-3CSIM datasheet(109/127 Pages) ATMEL

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109

AT89C51RB2/RC2

4180C–8051–12/03

DC Parameters for Low

Voltage

TA = 0

°C to +70°C; V

SS = 0V; VCC = 2.7V to 3.6V; F = 0to 40 MHz

TA = -40

°C to +85°C; V

SS = 0V; VCC = 2.7V to 3.6V; F = 0 to 40 MHz

Notes:

1. Operating ICC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns (see Figure 49.), VIL =

VSS + 0.5V,

VIH = 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 I

CC 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 I

OL per port pin: 10 mA

Maximum I

OL per 8-bit port:

Port 0: 26 mA

Ports 1, 2 and 3: 15 mA

Maximum total IOL for all output pins: 71 mA

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIL

Input Low Voltage

-0.5

0.2 VCC - 0.1

VIH

Input High Voltage except RST, XTAL1

0.2 VCC + 0.9

VCC + 0.5

VIH1

Input High Voltage, RST, XTAL1

0.7 VCC

VCC + 0.5

VOL

Output Low Voltage, ports 1, 2, 3, 4(6)

0.45

IOL = 0.8 mA

(4)

VOL1

Output Low Voltage, port 0, ALE, PSEN (6)

0.45

IOL = 1.6 mA

(4)

VOH

Output High Voltage, ports 1, 2, 3, 4

0.9 VCC

VIOH = -10 µA

VOH1

Output High Voltage, port 0, ALE, PSEN

0.9 VCC

VIOH = -40 µA

IIL

Logical 0 Input Current ports 1, 2, 3, 4

-50

µAV

IN = 0.45 V

ILI

Input Leakage Current for P0 only

±10

µA

0.45V < VIN < VCC

ITL

Logical 1 to 0 Transition Current, ports 1, 2, 3,

-650

µAV

IN = 2.0V

RRST

RST Pulldown Resistor

200 (5)

250

Ω

CIO

Capacitance of I/O Buffer

Fc = 3 MHz

TA = 25

°C

Power Down Current

10 (5)

µA

VCC = 2.7V to

3.6V(3)

CCOP

Power Supply Current on normal mode

0.4 x Frequency (MHz) + 5

CC = 3.6 V

(1)

CCIDLE

Power Supply Current on idle mode

0.3 x Frequency (MHz) + 5

CC = 3.6 V

(2)

ICCProg

Power Supply Current during flash Write / Erase

0.4 x

Frequency

(MHz) +

VCC = 5.5V

(8)

AT89C51RC2-3CSIM Datasheet(PDF) 109 Page - ATMEL Corporation

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