Datasheet

 1997-2013 Microchip Technology Inc. Preliminary DS30453E-page 75
PIC16C5X
1TOSC External CLKIN Period
(1)
250 — — ns XT OSC mode
100 — — ns 10 MHz mode
50 — — ns HS
OSC mode (Comm/Ind)
62.5 — — ns HS OSC mode (Ext)
25 — — sLP
OSC mode
Oscillator Period
(1)
250 — — ns RC OSC mode
250 — 10,000 ns XT OSC mode
100 — 250 ns 10 MHz mode
50 — 250 ns HS
OSC mode (Comm/Ind)
62.5 — 250 ns HS OSC mode (Ext)
25 — — sLP
OSC mode
2 Tcy Instruction Cycle Time
(2)
—4/FOSC ——
3 TosL,
Tos H
Clock in (OSC1) Low or High
Time
85* — — ns XT oscillator
20* — — ns HS oscillator
2.0* — — s LP oscillator
4TosR,
Tos F
Clock in (OSC1) Rise or Fall
Time
— — 25* ns XT oscillator
— — 25* ns HS oscillator
— — 50* ns LP oscillator
TABLE 12-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C54/55/56/57
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C  T
A  +70°C for commercial
–40°C  T
A  +85°C for industrial
–40°C  T
A  +125°C for extended
Param
No.
Symbol Characteristic Min Typ† Max Units Conditions
* These parameters are characterized but not tested.
† Data in the Typical (“Typ”) column is at 5.0V, 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.