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PDF WF5028 Data sheet ( Hoja de datos )

Número de pieza WF5028
Descripción 0.8V Operation Crystal Oscillator Module ICs
Fabricantes Seiko Instruments 
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WF5028 series
0.8V operation Crystal Oscillator Module ICs
OVERVIEW
The WF5028 series are miniature crystal oscillator module ICs. The devices are fabricated using a proprietary
low voltage process, enabling 0.8V operation. The pad layouts are selective from 3 types depending on pack-
age structures, mounting methods, which are suitable for miniature crystal oscillators. The WF5028 series can
be used to realize ultra miniature, ultra low voltage crystal oscillators.
FEATURES
I Wide range of operating supply voltage: 0.8 to 2.0V
I Optimized low crystal drive current oscillation for
miniature crystal units
I 3 pad layout options for mounting
• WF5028A× series: for Flip Chip Bonding
• CF5028B× series: for Wire Bonding (type I)
• CF5028C× series: for Wire Bonding (type II)
I Recommended oscillation frequency range:
20MHz to 50MHz
I Multi-stage frequency divider for low-frequency
output support: 0.75MHz (min)
I Frequency divider built-in
• Selectable by version: fO, fO/2, fO/4, fO/8, fO/16,
fO/32, fO/64
I 40 to 85°C operating temperature range
I Standby function
• High impedance in standby mode, oscillator
stops
I CMOS output duty level (1/2VDD)
I 50 ± 5% output duty
I 15pF output drive capability
I Wafer form (WF5028××)
Chip form (CF5028××)
APPLICATIONS
I 3.2 × 2.5, 2.5 × 2.0, 2.0 × 1.6 size miniature crystal oscillator modules
ORDERING INFORMATION
Device
WF5028××–4
CF5028××–4
Package
Wafer form
Chip form
SEIKO NPC CORPORATION —1

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WF5028 pdf
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WF5028 series
Table 2. Version identification by version name and chip markings
Version set by trimming fuses
Version set by mask pattern
Version
name
Version
name chip
Trimming fuses*1
Version
name chip
Trimming
fuses
marking F1 F2 F3 F4 F5 F6 F7 F8 F9
marking
F1 to F9
5028A1 AX − − −
AX
5028A2 AX × − −
A2
5028A3 AX − × −
A3
5028A4 AX × × −
A4
5028A5 AX − − ×
A5
5028A6 AX × − ×
A6
5028A7 AX − × ×
A7
5028B1 BX − − −
BX
5028B2 BX × − −
B2
5028B3 BX − × −
B3
5028B4 BX × × −
Untrimmed
B4 Untrimmed
5028B5 BX − − ×
B5
5028B6 BX × − ×
B6
5028B7 BX − × ×
B7
5028C1 CX − − −
CX
5028C2 CX × − −
C2
5028C3 CX − × −
C3
5028C4 CX × × −
C4
5028C5 CX − − ×
C5
5028C6 CX × − ×
C6
5028C7 CX − × ×
C7
*1. : untrimmed, ×: trimmed
SEIKO NPC CORPORATION —5

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WF5028 arduino
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WF5028 series
TYPICAL PERFORMANCE
The following characteristics measured using the crystal below. Note that the characteristics will vary with the
crystal used.
I Crystal used for measurement
I Crystal parameters
Parameter
C0 [pF]
R1 []
fO = 48MHz
1.6
12
Current Consumption
L1 C1 R1
C0
Negative Resistance
5
4
CL = 15pF
3
2
1 No load
0
0.5 1.0
1.5 2.0
VDD [V]
5028×1, fOSC = 48MHz, fOUT = 48MHz, Ta = 25°C
0
0
200
400
Frequency [MHz]
20 40 60 80
100
C0 = 2pF
600
800
C0 = 1pF
C0 = 0pF
1000
5028×1, VDD = 0.9V, Ta = 25°C
Characteristics are measured with a capacitance C0, representing
the crystal equivalent circuit C0 capacitance, connected between
the XT and XTN pins. Measurements are performed with Agilent
4396B using the NPC test jig. Characteristics may vary with
measurement jig and measurement conditions.
Frequency Deviation by Supply Voltage
Change
12
8
f = 48MHz
4
0
4
8
12
0.5
1.0 1.5
VDD [V]
2.0
5028×1, CL = 15pF, 1.2V standard, Ta = 25°C
Drive Level
200
f = 48MHz
150
100
50
0
0.5 1.0
1.5
VDD [V]
5028×1, fOSC = 48MHz, Ta = 25°C
2.0
SEIKO NPC CORPORATION —11

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