PIC16F636T-I/SL(2005) View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16F636T-I/SL
(Rev.:2005)

8/14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC12F635/PIC16F636/639

15.10 AC Characteristics: PIC12F635/PIC16F636/639 (Industrial, Extended)

FIGURE 15-4:

EXTERNAL CLOCK TIMING

Q4

Q1

Q2

Q3

Q4

Q1

OSC1

CLKOUT

1

3

3

4

4

2

TABLE 15-1: EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

Sym

Characteristic

Min Typ† Max Units

Conditions

FOSC External CLKIN Frequency(1) DC —

37 kHz LP Oscillator mode

DC —

4 MHz XT Oscillator mode

DC —

20 MHz HS Oscillator mode

Oscillator Frequency(1)

DC —

5

—

20 MHz EC Oscillator mode

37 kHz LP Oscillator mode

——

— MHz HFINTOSC Oscillator mode

DC —

4 MHz RC Oscillator mode

0.1 —

4 MHz XT Oscillator mode

1

—

20 MHz HS Oscillator mode

1

TOSC External CLKIN Period(1)

27 —

—

μs LP Oscillator mode

50 —

—

ns HS Oscillator mode

50 —

—

ns EC Oscillator mode

Oscillator Period(1)

250 —

27

—

ns XT Oscillator mode

200 μs LP Oscillator mode

— 125

—

ns INTOSC Oscillator mode

250 —

—

ns RC Oscillator mode

250 — 10,000 ns XT Oscillator mode

50 — 1,000 ns HS Oscillator mode

2

TCY Instruction Cycle Time(1)

200 TCY

DC

ns TCY = 4/FOSC

3

TosL, External CLKIN (OSC1) High 2* —

—

μs LP oscillator, TOSC L/H duty cycle

TosH External CLKIN Low

20* —

—

ns HS oscillator, TOSC L/H duty cycle

100* —

—

ns XT oscillator, TOSC L/H duty cycle

4

TosR, External CLKIN Rise

TosF External CLKIN Fall

——

——

50* ns LP oscillator

25* ns XT oscillator

——

15* ns HS oscillator

* These parameters are characterized but not tested.

† Data in ‘Typ’ column is at 5.0V, 25°C unless otherwise stated. These parameters are for design guidance

only and are not tested.

Note 1:

Instruction cycle period (TCY) equals four times the input oscillator time base period. All specified values

are based on characterization data for that particular oscillator type under standard operating conditions

with the device executing code. Exceeding these specified limits may result in an unstable oscillator

operation and/or higher than expected current consumption. All devices are tested to operate at ‘min’

values with an external clock applied to OSC1 pin. When an external clock input is used, the ‘max’ cycle

time limit is ‘DC’ (no clock) for all devices.

DS41232B-page 162

Preliminary

© 2005 Microchip Technology Inc.

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