Datasheet

PIC16C5X
DS30453E-page 74 Preliminary  1997-2013 Microchip Technology Inc.
12.7 Timing Diagrams and Specifications
FIGURE 12-2: EXTERNAL CLOCK TIMING - PIC16C54/55/56/57
OSC1
CLKOUT
Q4
Q1 Q2
Q3 Q4 Q1
133
44
2
TABLE 12-1: EXTERNAL CLOCK TIMING REQUIREMENTS - PIC16C54/55/56/57
AC Characteristics
Standard Operating Conditions (unless otherwise specified)
Operating Temperature 0°C  TA  +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
1A F
OSC External CLKIN Frequency
(1)
DC — 4.0 MHz XT OSC mode
DC — 10 MHz 10 MHz mode
DC — 20 MHz HS OSC mode (Comm/Ind)
DC — 16 MHz HS
OSC mode (Ext)
DC — 40 kHz LP OSC mode
Oscillator Frequency
(1)
DC — 4.0 MHz RC OSC mode
0.1 — 4.0 MHz XT
OSC mode
4.0 — 10 MHz 10 MHz mode
4.0 — 20 MHz HS OSC mode (Comm/Ind)
4.0 — 16 MHz HS
OSC mode (Ext)
DC — 40 kHz LP OSC mode
* 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.