5042 series data sheet(English)

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 Wireless-LAN that require high frequency stability in the order of ±30
to ±10ppm. They use a pad layout suitable for wire bonding mounting.
FEATURES
FREQUENCY CHARACTERISTICS
COMPENSATION BEFORE and AFTER
ADJUSTMENT
Δf/f [ppm]
▪ Realizing frequency stability improvement with
minimal additional process
▪ Temperature compensation range / operating temperature
50
range: -40C to +85C
40
▪ Frequency adjustment functions built-in
30
Before compensation
<Frequency-temperature characteristics compensation function>
20
10
AT-cut crystal, 3rd order frequency-temperature characteristics
±10ppm
0
compensation, with independent low-temperature and high-10
temperature compensation settings
After compensation
-20
-30
- Center frequency adjustment function
-40
- Temperature rotation compensation function
-50
-40
-20
0
20
40
60
80
100
- Low-temperature characteristics compensation
Ta [°C]
- High-temperature characteristics compensation
▪ Rewritable EEPROM built-in
▪ 6 pads: same as general clock oscillator ICs
▪ Operating supply voltage range
APPLICATIONS
5042AxA: 2.25V to 3.63V
▪ 3.2mm×2.5mm, 2.5mm×2.0mm size miniature crystal
5042BxA: 1.60V to 2.25V
oscillator modules
▪ Recommended oscillation frequency range
▪ Wireless-LAN and applications requiring high-stability
(for fundamental oscillation): 20MHz to 55MHz
clock oscillators
▪ Frequency divider built-in
Frequency divider output for 2.5MHz (min) low frequency output
Selectable by version: fOSC, fOSC/2, fOSC/4, fOSC/8 (A4A version only)
▪ Standby function
High-impedance in standby mode, oscillator stops
▪ CMOS output
▪ 15pF output load capacitance
▪ Pad layout for wire bonding
▪ Chip form (CF5042xxA)
ORDERING INFORMATION
Device
Package
Version name
CF5042□□A-4
CF5042xxA-4
Chip form
Form CF : Chip(Die) form
Frequency divider function (output frequency)
Operating supply voltage
SEIKO NPC CORPORATION―1
5042 series
SERIES CONFIGURATION
Version name
Operating supply
voltage range
[V]
5042A1A
Output frequency fOUT
(divider ratio)
fOSC
5042A2A
2.25 to 3.63
fOSC/2
5042A3A
fOSC/4
5042A4A
fOSC/8
5042B1A
fOSC
5042B2A
5042B3A
1.60 to 2.25
fOSC/2
fOSC/4
SEIKO NPC CORPORATION—2
5042 series
PAD LAYOUT
(Unit: µm)
(420,345)
Y
Q
5
VDD
6
(0,0)
1
(−420,−345)
4
VSS
3
INHN
2
XTN
XT
X
Chip size: 0.84mm × 0.69mm
Chip thickness: 130µm ± 15µm
Pad size: 80µm × 80µm
Chip base: VSS level
PAD DIMENSIONS
Pad No.
Pin
PIN DESCRIPTION
Pad dimensions [µm]
I/O*1
Name
Description
X
Y
–225.2
–253.5
225.2
–253.5
1
XTN
O
Amplifier output
2
XT
I
Amplifier input
3
INHN
I
Output state control input
High impedance when LOW (oscillator stops).
Power-saving pull-up resistor built-in.
328.5
–5.0
4
VSS
–
(–) ground
–
328.5
223.8
5
Q
O
Output
Output frequency determined by internal circuit
to one of fOSC, fOSC/2, fOSC/4, fOSC/8.*2
High impedance in standby mode
–328.5
223.8
6
VDD
–
(+) supply voltage
–
–328.5
–5.0
Crystal connection pins.
Crystal is connected between XT and XTN.
*1. I: Input, O: Output
*2. fOSC/8: 5042A4A version only
SEIKO NPC CORPORATION—3
5042 series
BLOCK DIAGRAM
XT
XTN
RF
Regulator *2
VDD
1
N *1
Q
Oscillation
Detection
RPU
INHN
Temperature
Compensation
VSS
Control Register
FO, TO, RTG, TLO, TLG,
THO, THG
*1. 5042A×A version: N = 1, 2, 4, 8 (mask option)
5042B×A version: N = 1, 2, 4 (mask option)
*2. 5042A×A version only
SEIKO NPC CORPORATION—4
5042 series
ABSOLUTE MAXIMUM RATINGS
VSS = 0V unless otherwise noted.
Parameter
Symbol
Rating
Unit
Between VDD and VSS
−0.3 to +4.0
V
VPP
Between INHN and VSS
−0.3 to +16.5
V
VIN
Input pins
−0.3 to VDD + 0.3
V
−0.3 to VDD + 0.3
V
± 20
mA
−65 to +150
°C
100
times
Supply voltage range*1
VDD
Program read/write input voltage
range*1
Input voltage range*1 *2
Conditions
Output voltage range*1 *2
VOUT
Output pins
Output current*1
IOUT
Q pin
Storage temperature range*3
TSTG
Chip form
EEPROM maximum writes
NEW
*1. This parameter rating is the values that must never exceed even for a moment. This product may suffer breakdown if this parameter rating is
exceeded. Operation and characteristics are guaranteed only when the product is operated at recommended operating conditions.
*2. VDD is a VDD value of recommended operating conditions.
*3. When stored in nitrogen or vacuum atmosphere applied to IC itself only (excluding packaging materials).
RECOMMENDED OPERATING CONDITIONS
VSS = 0V unless otherwise noted.
Rating
Parameter
Supply voltage
Input voltage
Symbol
Max
5042A×A
2.25
–
3.63
V
5042B×A
1.60
–
2.25
V
VSS
–
VDD
V
−40
–
+85
°C
5042A×A
20
–
55
MHz
5042B×A
20
–
55
MHz
5042A×A
2.5
–
55
MHz
5042B×A
5
–
55
MHz
–
–
15
pF
VIN
Input pins (XT, INHN)
Oscillation frequency*1
fOSC
Output load capacitance
Typ
Between VDD and VSS
TOPR
Unit
Min
VDD
Operating temperature
Output frequency*1
Conditions
fOUT
Q pin
CLOUT
Q pin
*1. The recommended oscillation frequency is a yardstick value derived from the crystal used for NPC characteristics authentication. However, the oscillation frequency range is not guaranteed. Specifically, the characteristics can vary greatly due to crystal characteristics and mounting conditions, so the
oscillation characteristics of components must be carefully evaluated.
■
Mount a ceramic chip capacitor that is larger than 0.01µF proximal to IC (within approximately 3mm) between VDD and VSS in order to
obtain stable operation of 5042 series. In addition, the wiring pattern between IC and capacitor should be as wide as possible.
■
Since it may influence the reliability if it is used out of range of recommended operating conditions, this product should be used within
this range.
SEIKO NPC CORPORATION—5
5042 series
ELECTRICAL CHARACTERISTICS
DC Characteristics (5042A1A to A4A)
VDD = 2.25V to 3.63V, VSS = 0V, TOPR = −40°C to +85°C, CLOUT = 15pF unless otherwise noted.
Rating
Parameter
Symbol
Conditions
5042A1A (fOUT = fOSC),
Measurement circuit 1, no load,
INHN = HIGH, fOSC = 48MHz
Operating-mode current
consumption*1
IDD
5042A2A (fOUT = fOSC/2),
Measurement circuit 1, no load,
INHN = HIGH, fOSC = 48MHz
5042A3A (fOUT = fOSC/4),
Measurement circuit 1, no load,
INHN = HIGH, fOSC = 48MHz
5042A4A (fOUT = fOSC/8),
Measurement circuit 1, no load,
INHN = HIGH, fOSC = 48MHz
Unit
MIN
TYP
MAX
VDD = 2.5V
–
1.4
2.8
mA
VDD = 3.3V
–
1.7
3.4
mA
VDD = 2.5V
–
1.1
2.2
mA
VDD = 3.3V
–
1.4
2.7
mA
VDD = 2.5V
–
1.0
1.9
mA
VDD = 3.3V
–
1.2
2.4
mA
VDD = 2.5V
–
0.9
1.7
mA
VDD = 3.3V
–
1.0
2.1
mA
–
–
10
µA
VDD−0.4
–
–
V
–
–
0.4
V
Q = VDD
–
–
10
µA
Q = VSS
−10
–
–
µA
0.7VDD
–
–
V
–
–
0.3VDD
V
INHN = VSS
0.4
1.5
10
MΩ
INHN = 0.7VDD
50
100
200
kΩ
Standby-mode current
consumption
IST
Measurement circuit 1, INHN = LOW
HIGH-level output voltage
VOH
Q pin, Measurement circuit 3, IOH = −4mA
LOW-level output voltage
VOL
Q pin, Measurement circuit 3, IOL = 4mA
Output leakage current
HIGH-level input current
LOW-level input current
INHN pull-up resistance
IZ
VIH
Measurement circuit 4,
INHN = LOW
INHN pin, Measurement circuit 5
VIL
RPU1
RPU2
Measurement circuit 6
*1. The consumption current IDD (CLOUT) with a load capacitance (CLOUT) connected to the Q pin is given by the following equation, where IDD is the noload consumption current and fOUT is the output frequency.
IDD (CLOUT) [mA] = IDD [mA] + CLOUT [pF] × VDD [V] × fOUT [MHz] × 10–3
SEIKO NPC CORPORATION—6
5042 series
DC Characteristics (5042B1A to B3A)
VDD = 1.60V to 2.25V, VSS = 0V, TOPR = −40°C to +85°C, CLOUT = 15pF unless otherwise noted.
Rating
Parameter
Operating-mode current
consumption*1
Symbol
IDD
Conditions
Unit
MIN
TYP
MAX
5042B1A (fOUT = fOSC), Measurement circuit 1,
no load, INHN = HIGH, fOSC = 48MHz,
VDD = 1.8V
–
1.7
3.4
mA
5042B2A (fOUT = fOSC/2), Measurement circuit 1,
no load, INHN = HIGH, fOSC = 48MHz,
VDD = 1.8V
–
1.5
3.3
mA
5042B3A (fOUT = fOSC/4), Measurement circuit 1,
no load, INHN = HIGH, fOSC = 48MHz,
VDD = 1.8V
–
1.4
3.2
mA
–
–
10
µA
VDD−0.4
–
–
V
–
–
0.4
V
Q = VDD
–
–
10
µA
Q = VSS
−10
–
–
µA
0.7VDD
–
–
V
–
–
0.3VDD
V
INHN = VSS
0.4
1.5
10
MΩ
INHN = 0.7VDD
50
100
200
kΩ
Standby-mode current
consumption
IST
Measurement circuit 1, INHN = LOW
HIGH-level output voltage
VOH
Q pin, Measurement circuit 3, IOH = −4mA
LOW-level output voltage
VOL
Q pin, Measurement circuit 3, IOL = 4mA
Output leakage current
HIGH-level input current
LOW-level input current
INHN pull-up resistance
IZ
VIH
Measurement circuit 4,
INHN = LOW
INHN pin, Measurement circuit 5
VIL
RPU1
RPU2
Measurement circuit 6
*1. The consumption current IDD (CLOUT) with a load capacitance (CLOUT) connected to the Q pin is given by the following equation, where IDD is the noload consumption current and fOUT is the output frequency.
IDD (CLOUT) [mA] = IDD [mA] + CLOUT [pF] × VDD [V] × fOUT [MHz] × 10–3
SEIKO NPC CORPORATION—7
5042 series
AC Characteristics
Clock output characteristics (5042A1A to A4A, Q pin)
VDD = 2.25V to 3.63V, VSS = 0V, TOPR = −40°C to +85°C, CLOUT = 15pF unless otherwise noted.
Parameter
Symbol
Rating
Conditions
MIN
TYP
MAX
Unit
tr
Measurement circuit 1, 0.1VDD → 0.9VDD
–
–
4.5
ns
tf
Measurement circuit 1, 0.9VDD → 0.1VDD
–
–
4.5
ns
Duty
Measurement circuit 1, threshold voltage 0.5VDD,
Duty = Tw/T × 100
45
50
55
%
Output enable delay time*2
tOE
Measurement circuit 2*3, INHN = LOW → HIGH
–
–
10
µs
Output disable delay time
tOD
Measurement circuit 2*3, INHN = HIGH → LOW
–
–
100
ns
Output rise time
Output fall time
Output duty cycle
*1
Clock output characteristics (5042B1A to B3A, Q pin)
VDD = 1.60V to 2.25V, VSS = 0V, TOPR = −40°C to +85°C, CLOUT = 15pF unless otherwise noted.
Parameter
Symbol
Rating
Conditions
MIN
TYP
MAX
Unit
Output rise time
tr
Measurement circuit 1, 0.1VDD → 0.9VDD
–
–
5
ns
Output fall time
tf
Measurement circuit 1, 0.9VDD → 0.1VDD
–
–
5
ns
45
50
55
%
Output duty cycle*1
Duty
Measurement circuit 1, threshold voltage 0.5VDD,
Duty = Tw/T × 100
Output enable delay time*2
tOE
Measurement circuit 2*3, INHN = LOW → HIGH
–
–
10
µs
tOD
Measurement circuit 2*3, INHN = HIGH → LOW
–
–
100
ns
Output disable delay time
*1. This parameter is measured using the NPC’s standard crystal. Note that the values will vary with the crystal characteristics used or mounting
conditions.
*2. Oscillator stop function is built-in. When INHN goes LOW, normal output stops. When INHN goes HIGH, normal output is not resumed until after the
oscillator start-up time has elapsed.
*3. Measurement circuit 2 takes an external input on the XT pin, without using a crystal.
0.9VDD
TW
0.1VDD
Q
0.9VDD
DUTY measurement
voltage (0.5VDD)
0.1VDD
DUTY= TW/ T
T
tr
100 [%]
tf
Figure 1. Output switching waveform
0.7VDD
INHN
0.3VDD
tr = tf = 2ns
(10% to 90%)
tOD
tOE
0.1V
0.5VDD
Q
0.1V
fOUT
Hi-Z
Low
fOUT
Figure 2. Output disable timing chart
SEIKO NPC CORPORATION—8
5042 series
MEASUREMENT CIRCUITS
Measurement Circuit 1
Measurement Circuit 4
Parameters: IDD, IST, Duty, tr, tf
Parameters: IZ
IDD
IST
A
VDD
IDD: Open
DUTY, tr, tf: Short
IST: Open or Short
VDD
XT
VDD
A
Q
or
VSS
Q
Crystal
IZ
INHN VSS
XTN
INHN VSS
CLOUT = 15pF
(Including probe
capacitance)
IDD, DUTY, tr, tf: Open
IST: Short
Note: The AC characteristics are observed using an oscilloscope on
pin Q.
Measurement Circuit 5
Parameters: VIH, VIL
Measurement Circuit 2
Parameters: tOD, tOE
VDD
RL1 =1kΩ
VDD
Signal
Generator
INHN VSS
VIH V
VIL
Q
0.001µF
XT
INHN VSS
RL2 =1kΩ
50Ω
VDD
or
Measurement Circuit 6
VSS
Parameters: RPU1, RPU2
XT input signal: 1Vp-p, sine wave
Measurement Circuit 3
VDD
Parameters: VOH, VOL
INHN VSS
VDD
50Ω
Signal
Generator
Q
0.001µF
XT
VSS
50Ω
∆V
VIN V
VOH
VS
VS adjusted such that ∆V =
50 × IOH.
VS
VOL
VOH
V
VOL
A IPU
RPU1 =
VDD
IPU
(VIN = 0V)
RPU2 = VDD 0.7V DD (VIN = 0.7V DD)
IPU
0.1µF
VS
∆V
VS adjusted such that ∆V =
50 × IOL.
XT input signal: 1Vp-p, sine wave
SEIKO NPC CORPORATION—9
5042 series
FUNCTIONAL DESCRIPTION
Frequency Adjustment Function
The 5042 series ICs have a built-in oscillator frequency adjustment function. The frequency adjustment settings are written to and stored in internal EEPROM, making the devices easy to setup. A typical compensation
sequence is shown below.
50
40
Before adjustment
30
20
10
0
−10
−20
Before compensation
20
10
∆f/f [ppm]
∆f/f [ppm]
50
40
30
0
−10
−20
−30
−30
After adjustment
−40
−50
−40 −20
0
20
40
60
After compensation
−40
−50
−40 −20
0
20
40
80 100
Ta [°C]
Figure 3. Center frequency adjustment
After compensation
∆f/f [ppm]
∆f/f [ppm]
50
40
30
0
−10
−20
−30
−40
−50
−40 −20
20
40
60
Before compensation
20
10
0
−10
−20
After compensation
−30
Before compensation
0
80 100
Figure 4. Temperature rotation compensation
50
40
30
20
10
60
Ta [°C]
80 100
Ta [°C]
Figure 5. Low-temperature characteristics
compensation
−40
−50
−40 −20
0
20
40
60
80 100
Ta [°C]
Figure 6. High-temperature characteristics
compensation
SEIKO NPC CORPORATION—10
5042 series
Power-saving Pull-up Resistor
The INHN pin pull-up resistance RPU1 or RPU2 changes in response to the input level (open, HIGH, or LOW).
When INHN is tied LOW level, the pull-up resistance is large (RPU1), reducing the current consumed by the
resistance. When INHN is left open circuit (HIGH), the pull-up resistance is small (RPU2), which decreases the
input susceptibility to external noise. The pull-up resistance ties the INHN pin HIGH level, helping to avoid
problems such as the output stopping unexpectedly.
Oscillation Detector Function
The 5042 series also feature an oscillation detector circuit. This circuit functions to disable the outputs until the
oscillator circuit starts and oscillation becomes stable. This alleviates the danger of abnormal oscillator output
at oscillator start-up when power is applied or when INHN is switched.
USAGE NOTES
Consideration for Mounting IC
A ceramic chip capacitor that is larger than 0.01µF should be mounted proximal to IC (within approximately
3mm) between VDD and VSS in order to obtain stable operation of 5042 series. In addition, the wiring pattern
between IC and capacitor should be as wide as possible.
SEIKO NPC CORPORATION—11
5042 series
Please pay your attention to the following points at time of using the products shown in this document.
1. The products shown in this document (hereinafter “Products”) are designed and manufactured to the generally accepted standards of
reliability as expected for use in general electronic and electrical equipment, such as personal equipment, machine tools and
measurement equipment. The Products are not designed and manufactured to be used in any other special equipment requiring
extremely high level of reliability and safety, such as aerospace equipment, nuclear power control equipment, medical equipment,
transportation equipment, disaster prevention equipment, security equipment. The Products are not designed and manufactured to be
used for the apparatus that exerts harmful influence on the human lives due to the defects, failure or malfunction of the Products.
If you wish to use the Products in that apparatus, please contact our sales section in advance.
In the event that the Products are used in such apparatus without our prior approval, we assume no responsibility whatsoever for any
damages resulting from the use of that apparatus.
2. NPC reserves the right to change the specifications of the Products in order to improve the characteristics or reliability thereof.
3. The information described in this document is presented only as a guide for using the Products. No responsibility is assumed by us for
any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or
otherwise under any patents or other rights of the third parties. Then, we assume no responsibility whatsoever for any damages
resulting from that infringements.
4. The constant of each circuit shown in this document is described as an example, and it is not guaranteed about its value of the massproduction products.
5. In the case of that the Products in this document falls under the foreign exchange and foreign trade control law or other applicable laws
and regulations, approval of the export to be based on those laws and regulations are necessary. Customers are requested
appropriately take steps to obtain required permissions or approvals form appropriate government agencies.
SEIKO NPC CORPORATION
1-9-9, Hatchobori, Chuo-ku,
Tokyo 104-0032, Japan
Telephone: +81-3-5541-6501
Facsimile: +81-3-5541-6510
http://www.npc.co.jp/
Email: sales@npc.co.jp
1'(
SEIKO NPC CORPORATION—12