LPC1547JBD48 datasheet(70/99 Pages) NXP

70 / 99 page

LPC15XX

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Product data sheet

Rev. 1 — 19 February 2014

70 of 99

NXP Semiconductors

LPC15xx

32-bit ARM Cortex-M3 microcontroller

[2]

Typical ratings are not guaranteed. The values listed are for room temperature (25

C), nominal supply

voltages.

12.3 Internal oscillators

[1]

Parameters are valid over operating temperature range unless otherwise specified.

[2]

Typical ratings are not guaranteed. The values listed are for room temperature (25

C), nominal supply

voltages.

Fig 33. External clock timing (with an amplitude of at least Vi(RMS) = 200 mV)

Table 16.

Dynamic characteristics: IRC

Tamb = 40 C to +105 C; 2.7 V  VDD  3.6 V[1].

Symbol

Parameter

Conditions

Min

Typ[2]

Max

Unit

fosc(RC)

internal RC

oscillator frequency

25 C  T

amb  +85 C

12 - 1%

12 + 1 %

MHz

40 C  T

amb < 25 C

12 - 2%

12 + 1 %

MHz

C < T

amb  105 C

12 - 1.5 % 12

12 + 1.5 % MHz

Conditions: Frequency values are typical values. 12 MHz

 1 % accuracy is guaranteed for

2.7 V

 V

DD  3.6 V and Tamb = 25 C to +85 C. Variations between parts may cause the IRC to

fall outside the 12 MHz

 1 % accuracy specification for voltages below 2.7 V.

Fig 34. Typical Internal RC oscillator frequency versus temperature

aaa-011233

-40

-10

110

11.85

11.9

11.95

12.05

12.1

12.15

temperature (°C)

fosc(RC)

osc(RC)

fosc(RC)

(MHz)

3.6 V

3.3 V

3.0 V

2.7 V

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