AT89C51IC2-SLSCM datasheet(129/146 Pages) ATMEL

129 / 146 page

129

AT89C51IC2

4301A–8051–01/04

Notes:

1. Operating I

CC is measured with all output pins disconnected; XTAL1 driven with TCLCH, TCHCL = 5 ns (see Figure 55.), VIL =

VSS + 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

52).

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 = V

CC; EA = RST = VSS (see Figure 53).

3. Power Down I

CC is measured with all output pins disconnected; EA = VSS, PORT 0 = VCC; XTAL2 NC.; RST = VSS (see Fig-

ure 54).

4. Capacitance loading on Ports 0 and 2 may cause spurious noise pulses to be superimposed on the V

OLs 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. 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, I

OL must be externally limited as follows:

Maximum I

OL 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 I

OL 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 V

CC Min down to 0.

OH1

Output High Voltage, port 0, ALE, PSEN

CC - 0.3

CC - 0.7

CC - 1.5

CC = 5V ± 10%

OH = -200 µA

OH = -3.2 mA

OH = -7.0 mA

0.9 V

VCC = 2.7V to 5.5V

OH = -10 µA

RST

RST Pulldown Resistor

200(5)

250

Ω

Logical 0 Input Current ports 1, 2, 3, 4 and 5

-50

µAV

IN = 0.45V

Input Leakage Current for P0 only

±10

µA

0.45V < V

IN < VCC

Logical 1 to 0 Transition Current, ports 1, 2, 3, 4

-650

µAV

IN = 2.0V

Capacitance of I/O Buffer

Fc = 3 MHz

TA = 25

°C

IPD

Power Down Current

100

150

µA4.5V < V

CC < 5.5V

(3)

ICCOP

Power Supply Current on normal mode

0.4 x Frequency (MHz) + 5

VCC = 5.5V

(1)

ICCIDLE

Power Supply Current on idle mode

0.3 x Frequency (MHz) + 5

VCC = 5.5V

(1)

CCProg

Power Supply Current during flash Write / Erase

0.4 x

Frequency

(MHz) + 20

CC = 5.5V

(8)

A = -40°C to +85°C; VSS = 0V;

CC =2.7V to 5.5V and F = 0 to 40 MHz (both internal and external code execution)

CC =4.5V to 5.5V and F = 0 to 60 MHz (internal code execution only) (Continued)

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

AT89C51IC2-SLSCM Datasheet(PDF) 129 Page - ATMEL Corporation

AT89C51IC2-SLSCM Datasheet(HTML) 129 Page - ATMEL Corporation

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