Datasheet

PIC16F5X
DS41213D-page 64 © 2007 Microchip Technology Inc.
TABLE 11-1: EXTERNAL CLOCK TIMING REQUIREMENTS
AC CHARACTERISTICS
Standard Operating Conditions (unless otherwise specified)
Operating Temperature -40°C ≤ TA ≤ +85°C for industrial
-40°C ≤ T
A ≤ +125°C for extended
Parameter
No.
Sym. Characteristic Min. Typ† Max. Units Conditions
F
OSC
External CLKIN Frequency
(1)
DC — 4.0 MHz XT Osc mode
DC — 20 MHz HS Osc mode
DC — 200 kHz LP Osc mode
Oscillator Frequency
(1)
DC — 4.0 MHz RC Osc mode
0.1 — 4.0 MHz XT Osc mode
4.0 — 20 MHz HS Osc mode
5.0 — 200 kHz LP Osc mode
1T
OSC External CLKIN Period
(1)
250 — — ns XT Osc mode
50 — — ns HS Osc mode
5.0 — — μsLP Osc mode
Oscillator Period
(1)
250 — — ns RC Osc mode
250 — 10,000 ns XT Osc mode
50 — 250 ns HS Osc mode
5.0 — — μsLP Osc mode
2T
CY Instruction Cycle Time
(2)
—4/FOSC ——
3 TosL, TosH Clock in (OSC1) Low or High
Time
50* — — ns XT oscillator
20* — — ns HS oscillator
2.0* — — μs LP oscillator
4 TosR, TosF Clock in (OSC1) Rise or Fall
Time
— — 25* ns XT oscillator
— — 5* ns HS oscillator
— — 50* ns LP oscillator
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5V, 25°C unless otherwise stated. These parameters are for design
guidance only and are not tested.
Note 1: 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.
When an external clock input is used, the “max” cycle time limit is “DC” (no clock) for all devices.
2: Instruction cycle period (T
CY) equals four times the input oscillator time base period.