LH7A400_N NXP Semiconductors, LH7A400_N Datasheet - Page 57

• Manufacturer Part Number: LH7A400_N
• Description: The LH7A400, powered by an ARM922T, is a completeSystem-on-Chip with a high level of integration tosatisfy a wide range of requirements and expectations
• Manufacturer: NXP Semiconductors

32-Bit System-on-Chip
Preliminary data sheet
NOTES:
1. Y1 is a parallel-resonant type crystal. (See table)
2. The nominal values for C1 and C2 shown are for
3. The values for C1 and C2 are dependent upon
4. R1 must be in the circuit.
5. Ground connections should be short and return
6. Tolerance for R1, C1, C2 is ≤ 5%.
a crystal specified at 18 pF load capacitance (CL).
the cystal's specified load capacitance and PCB
stray capacitance.
to the ground plane which is connected to the
processor's core ground pins.
Figure 46. 14.7456 MHz External Oscillator Components and Schematic
INTERNAL TO
THE LH7A400
EXTERNAL TO
THE LH7A400
Rev. 01 — 16 July 2007
NXP Semiconductors
ENABLE
XTALIN
RECOMMENDED CRYSTAL SPECIFICATIONS
PARAMETER
14.7456 MHz Crystal
Tolerance
Stability
Aging
Load Capacitance
ESR (MAX.)
Drive Level
Recommended Part
C1
18 pF
GND
14.7456 MHz
1 MΩ
Y1
R1
DESCRIPTION
(AT-Cut) Parallel Mode
±50 ppm
±100 ppm
±5 ppm
18 pF
40 Ω
100 µW (MAX.)
MTRON SX2050 or equivalent
XTALOUT
C2
22 pF
GND
LH7A400-188
LH7A400
57