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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP2140-ISO датащи(PDF) 30 Page - Microchip Technology |
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MCP2140-ISO датащи(HTML) 30 Page - Microchip Technology |
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30 / 58 page  MCP2140 DS21790A-page 30 Preliminary 2003 Microchip Technology Inc. 4.3 Timing Diagrams and Specifications FIGURE 4-3: EXTERNAL CLOCK TIMING TABLE 4-3: EXTERNAL CLOCK TIMING REQUIREMENTS AC Specifications Electrical Characteristics: Standard Operating Conditions (unless otherwise specified): Operating Temperature: -40 °C ≤ TA ≤ +85°C (industrial) Operating Voltage VDD range is described in Section 4.1 Param. No. Sym Characteristic Min Typ(1) Max Units Conditions 1 TOSC External CLKIN Period (2, 3) 90.422 90.422 — — 90.422 — ns ns Device Operation Low Power mode (PHACT drive Low) Oscillator Period (2) 90.422 — 90.422 ns 1A FOSC External CLKIN Frequency (2, 3) 7.3728 7.3728 7.3728 MHz Oscillator Frequency (2) 7.3728 — 7.3728 MHz 1B FERR Error in Frequency — — ± 0.01 % 1C ECLK External Clock Error — — ± 0.01 % 4 TosR, TosF Clock in (OSC1) Rise or Fall Time — — 15 ns Note 1: 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. 2: All specified values are based on oscillator characterization data under standard operating conditions. Exceeding these specified limits may result in 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. 3: A duty cycle of no more than 60% (High time/Low time or Low time/High time) is recommended for external clock inputs. OSC1 Q4 Q1 Q2 Q3 Q4 Q1 1 33 44 2 |
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