PIC16F871-E/L【PDF 23/143 页】IC MCU CMOS 20MHZ 2K FLSH 44PLCC

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Sheet目录3887

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2003 Microchip Technology Inc.

DS30569B-page 117

PIC16F870/871

14.0

ELECTRICAL CHARACTERISTICS

Absolute Maximum Ratings

Ambient temperature under bias................................................................................................................ .-55 to +125°C

Storage temperature .............................................................................................................................. -65°C to +150°C

Voltage on any pin with respect to VSS (except VDD, MCLR. and RA4) ......................................... -0.3V to (VDD + 0.3V)

Voltage on VDD with respect to VSS ............................................................................................................ -0.3 to +7.5V

Voltage on MCLR with respect to VSS (Note 2) ............................................................................................0 to +13.25V

Voltage on RA4 with respect to Vss ..................................................................................................................0 to +8.5V

Total power dissipation (Note 1) ............................................................................................................................... 1.0W

Maximum current out of VSS pin ........................................................................................................................... 300 mA

Maximum current into VDD pin .............................................................................................................................. 250 mA

Input clamp current, IIK (VI < 0 or VI > VDD)

..................................................................................................................... ± 20 mA

Output clamp current, IOK (VO < 0 or VO > VDD)

............................................................................................................. ± 20 mA

Maximum output current sunk by any I/O pin..........................................................................................................25 mA

Maximum output current sourced by any I/O pin .................................................................................................... 25 mA

Maximum current sunk by PORTA, PORTB, and PORTE (combined) (Note 3) ................................................... 200 mA

Maximum current sourced by PORTA, PORTB, and PORTE (combined) (Note 3).............................................. 200 mA

Maximum current sunk by PORTC and PORTD (combined) (Note 3) .................................................................200 mA

Maximum current sourced by PORTC and PORTD (combined) (Note 3) ............................................................ 200 mA

Note 1: Power dissipation is calculated as follows: Pdis = VDD x {IDD -

∑ IOH} + ∑ {(VDD - VOH) x IOH} + ∑(VOl x IOL)

2: Voltage spikes below VSS at the MCLR pin, inducing currents greater than 80 mA, may cause latch-up.

Thus, a series resistor of 50-100

should be used when applying a “low” level to the MCLR pin, rather than

pulling this pin directly to VSS.

3: PORTD and PORTE are not implemented on the 28-pin devices.

NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress rating only and functional operation of the device at those or any other conditions above those

indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for

extended periods may affect device reliability.

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