PIC16C745/SP View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC16C745/SP

8-Bit CMOS Microcontrollers with USB

Microchip Technology 

PIC16C745/765

TABLE 16-2: EXTERNAL CLOCK TIMING REQUIREMENTS

Param

No.

1A

1

2

3*

Sym Characteristic

Min Typ†

FOSC External CLKIN Frequency

(Note 1)

24

—

6

—

Oscillator Frequency

(Note 1)

24

—

6

—

TOSC External CLKIN Period

(Note 1)

41

—

167 —

Oscillator Period

(Note 1)

41

—

167 —

TCY Instruction Cycle Time (Note 1)

167 —

TOSL, External Clock in (OSC1) High or Low TBD —

TOSH Time

Max

24

6

24

6

41

167

41

167

DC

—

Units Conditions

MHz EC osc mode

MHz E4 osc mode

MHz HS osc mode

MHz H4 osc mode

ns EC osc modes

ns E4 osc mode

ns HS osc modes

ns H4 osc mode

ns TCY = 4/FINT

ns EC oscillator

4*

TOSR, External Clock in (OSC1) Rise or Fall TBD —

25

ns EC oscillator

TOSF Time

* These parameters are characterized but not tested.

†Data in “Typ” column is at 5V, 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 when the PLL is enabled, or the input

oscillator time-base period divided by 4 when the PLL is disabled. 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 the OSC1/CLKIN pin. When an external clock input

is used, the “Max.” cycle time limit is “DC” (no clock) for all devices.

© 1999 Microchip Technology Inc.

Advanced Information

DS41124A-page 131

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