5042 Datasheet, PDF (1/11 Pages) Nippon Precision Circuits Inc – High-stability Crystal Oscillator IC with Frequency Adjustment Function

5042 series
High-stability Crystal Oscillator IC with Frequency Adjustment Function
OVERVIEW
The 5042 series are high-stability clock oscillator ICs with built-in frequency adjustment functions. The
frequency adjustment functions can be optimized, by the addition of a minimal adjustment process, to improve
the frequency stability. The function is implemented using frequency adjustment data written to a built-in
EEPROM over a 1-wire serial interface. The ICs are ideal for compact crystal oscillators for use in applications
such as WiMAX (Worldwide Interoperability for Microwave Access) and PLC (Power Line Communication)
that require high frequency stability in the order of ±30 to ±10ppm. They use a pad layout suitable for wire
bonding mounting.
FEATURES
I Realizing frequency stability improvement with
minimal additional process
I Temperature compensation range/ operating tem-
perature range: −40°C to +85°C
I Frequency adjustment functions built-in
• Frequency-temperature characteristics compen-
sation function
AT-cut crystal, 3rd order harmonic frequency-
temperature characteristics compensation, with
independent low-temperature and high-temper-
ature range compensation settings
- Center frequency adjustment function
- Temperature rotation compensation function
- Low-temperature characteristics compensation
- High-temperature characteristics compensation
I Rewritable EEPROM built-in
I 6 pads: same as general clock oscillator ICs
I Operating supply voltage range
• 5042A×A: 2.25V to 3.63V
• 5042B×A: 1.60V to 2.25V
I Recommended oscillation frequency range:
20MHz to 55MHz (for fundamental oscillation)
I Frequency divider built-in:
• Selectable by version: f_O, f_O/2, f_O/4, f_O/8, f_O/16,
f_O/32
• Frequency divider output for 0.625MHz (min)
low frequency output
I Standby function
High-impedance in standby mode, oscillator stops
I CMOS output
I 15pF output load
I Pad layout for wire bonding
I Chip form (CF5042××A)
FREQUENCY CHARACTERISTICS COMPENSATION BEFORE and AFTER ADJUSTMENT
50
40
30
20
10
0
−10
−20
−30
−40
−50
−40 −20 0
Before compensation
± 10ppm
After compensation
20 40 60 80 100
Ta [°C]
APPLICATIONS
I 3.2mm × 2.5mm, 2.5mm × 2.0mm size miniature crystal oscillator modules
I WiMAX, WiBro, PLC and applications requiring high-stability clock oscillators
ORDERING INFORMATION
Device
CF5042××A−4
Package
Chip form
SEIKO NPC CORPORATION—1