NPC CF5050A-1 Single-output clock generator ic Datasheet

SM5050A
Single-output Clock Generator IC
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The SM5050A is a single-output clock generator IC that generates standard high-frequency clocks derived
from a 20 to 40MHz crystal oscillator master clock. The high-frequency output stage uses optimized PLL circuits for low jitter output. The oscillator capacitors CG and CD are built-in, realizing a high-frequency output
oscillator by just the connection of a crystal. Two program inputs allows selection from 4 frequency multipliers, making the SM5050A able to generate multi-standard frequency clock outputs.
PAD DIMENSIONS
FEATURES
■
■
■
■
■
■
■
■
■
2.7 to 3.6V operating supply voltage
20 to 40MHz master clock frequency (fundamental)
Output frequency ranges
• 100 to 166.6MHz (VDD = VDDQ = 3.0 to 3.6V)
• 100 to 125MHz (VDD = VDDQ = 2.7 to 3.6V)
8mA output drive capability
Oscillator capacitors (CG, CD) and feedback resistor (Rf) built-in
100ps (typ) low jitter output (peak-to-peak)
2 program inputs for 4 selectable multiplier ratios
Standby function
Packaging
• Chip form (CF5050A)
• 8-pin VSOP package (SM5050AV)
(Unit: µm)
P1
P0
(2160,1570)
VSS
INHN
VSSQ
Q
XT
SA5050A
(0,0)
VDDQ VDD
XTN
Chip size: 2.16 × 1.57mm
Chip thickness: 300 ± 30µm
Chip base: V S S level
PINOUT
PACKAGE DIMENSIONS
(Top view )
(Unit: m m )
P0
VSS
2
7
INHN
Q
3
6
XT
VDD
4
5
XTN
0 to 10
0.5 ± 0.2
8
6.4 ± 0.3
1
4.4 ± 0.2
P1
0.575 typ
ORDERING INFORMATION
CF5050A–1
Chip form
SM5050AV
8-pin V S O P
1.15 ± 0.05
P ackag e
0.65
0.10
0.1 ± 0.05
D e vice
+0.1
0.15 −0.05
3.1 ± 0.3
0.22 ± 0.1
0.12 M
NIPPON PRECISION CIRCUITS—1
SM5050A
BLOCK DIAGRAM
VDDQ
VDD
XT
Oscillator
XTN
R-counter
Phase
Detector
Charge
Pump
LPF
VCO
Duty
Control
Circuit
Output
Buffer
Q
N-counter
P0
Control
Circuit
P1
INHN
VSS
VSSQ
PIN DESCRIPTION
SM5050AV
CF5050A
P ad dimensions [µm]
Number
Name
1
P1
2
VSS
3
Q
4
VDD
I/O 1
Description
Name
X
Y
P1
620
1330
Ip
Program input 1. Selects the output frequency multiplier ratio.
VSS
290
1132
–
Ground
VSSQ
290
920
–
Output circuit ground
Q
290
569
O
Output (CMOS)
VDDQ
540
240
–
Output circuit supply
VDD
906
240
–
Supply
Cr ystal oscillator connection pins.
Cr ystal connected between XT and XTN.
5
XTN
XTN
1524
240
O
6
XT
XT
1870
542
I
7
INHN
INHN
1870
1015
Ip
Operating state control (inhibit).
When INHN is LOW , output is high impedance and PLL circuits stop.
8
P0
P0
1540
1330
Ip
Program input 0. Selects the output frequency multiplier ratio.
1. Ip = input with built-in pull-up resistor.
NIPPON PRECISION CIRCUITS—2
SM5050A
OUTPUT FREQUENCY SETTINGS
Program inputs
Multiplier ratio
Master clock
frequency [MHz]
Output frequency
[MHz]
LOW
×4
25.00
100
LOW
HIGH
× 4.25
25.00
106.25
125
LOW
×5
25.00
HIGH
26.66
133.3
24.8832
155.52
26.66
166.6
P0
P1
LOW
HIGH
× 6.25
HIGH
Supply voltag e [V]
2.7 to 3.6
3.0 to 3.6
Note: The output frequency range is 100 to 166.6MHz. The master clock frequency can be adjusted to any value within the range 20 to 40MHz,
so the master clock frequency and multiplier should be selected such that the output frequency is within the output frequency range.
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0V
P arameter
Symbol
Condition
Rating
Unit
Supply voltage range
VDD
−0.5 to 6.0
V
Input voltage range
V IN
−0.5 to V D D + 0.5
V
VOUT
−0.5 to V D D + 0.5
V
CF5050A
−65 to 150
°C
SM5050AV
−55 to 125
°C
Output voltage range
Storage temperature range
T stg
Operating temperature range
T opr
−40 to 85
°C
Output current
IO U T
25
mA
150
mW
Pow er dissipation
PD
SM5050AV
Recommended Operating Conditions
VSS = 0V, fOUT = 100 to 166.6MHz, CL = 15pF
Rating
P arameter
Operating supply voltage
Symbol
VDD
Condition
Unit
min
typ
max
fO U T ≤ 1 2 5 M H z
2.7
–
3.6
fO U T ≤ 166.6MHz
3.0
–
3.6
V
Input voltage
V IN
VSS
–
VDD
V
Operating temperature
T opr
−20
–
80
°C
NIPPON PRECISION CIRCUITS—3
SM5050A
DC Characteristics
VDD = 2.7 to 3.6V, VSS = 0V, Ta = −20 to 80°C unless otherwise noted
Rating
P arameter
Symbol
Condition
Unit
min
typ
max
Q HIGH-level output voltage
VOH
V D D = 2.7V, IO H = 8mA
2.2
–
–
V
Q L OW -level output voltage
VOL
V D D = 2.7V, IO L = 8mA
–
–
0.4
V
Measurement circuit 4,
INHN = V S S
VOH = VDD
–
–
10
IZ
VOL = VSS
–
–
10
Q output leakage current
µA
INHN HIGH-level input voltage
V IH1
0.7V D D
–
–
V
P0, P1 HIGH-level input voltage
V IH2
0.9V D D
–
–
V
I N H N L OW -level input voltage
V IL1
–
–
0.3V D D
V
P0, P1 LOW -level input voltage
V IL2
–
–
0.1V D D
V
25MHz cr ystal, measurement circuit 1,
load circuit 1, INHN = open, C L = 15pF,
P0 = HIGH, P1 = LOW , V D D = 3.0V
–
23
–
25MHz cr ystal, measurement circuit 1,
load circuit 1, INHN = open, C L = 15pF,
P0 = HIGH, P1 = LOW
–
–
42
INHN = V S S , measurement circuit 1
–
–
40
µA
0.3
–
6
MΩ
10
–
200
kΩ
–
−240
–
Ω
100
300
900
kΩ
15.98
18.44
20.90
pF
15.98
18.44
20.90
pF
Current consumption
Standby current
ID D
IS T
INHN, P0, P1 input pull-up
resistance
RUP1
Negative resistance
−R L
Feedback resistance
Rf
Internal capacitance
RUP2
CG
CD
V D D = 3V, measurement circuit 2
V D D = 3V, Ta = 25 °C , f = 30MHz
Measurement circuit 3
mA
Design values
NIPPON PRECISION CIRCUITS—4
SM5050A
Switching Characteristics
VDD = 2.7 to 3.6V, VSS = 0V, Ta = −20 to 80°C unless otherwise noted
Rating
P arameter
Symbol
Condition
Unit
min
typ
max
Output rise time
tr
0.2V D D → 0.8V D D , measurement
circuit 1, load circuit 1, C L = 15pF
–
1
2.5
ns
Output fall time
tf
0.8V D D → 0.2V D D , measurement
circuit 1, load circuit 1, C L = 15pF
–
1
2.5
ns
Output duty cycle
Duty
V D D = 3V, Ta = 25 °C , measurement
circuit 1, load circuit 1, C L = 15pF,
f ≤ 166.6MHz
40
–
60
%
Output disable delay time 1
tP L Z
V D D = 3V, Ta = 25 °C , measurement
circuit 1, load circuit 1, C L = 15pF
–
–
100
ns
Star tup time 2 ,3
tS Z L
V D D = 3V, Ta = 25 °C , measurement
circuit 1, load circuit 1, C L = 15pF
–
1
–
ms
f
Measurement circuit 1
20
–
40
MHz
–
125
Measurement circuit 1
V D D = 2.7V
100
fO U T
V D D = 3.0V
100
–
166.6
Jitter
V D D = 3V, Ta = 25 °C , 25MHz crystal,
P0 = HIGH, P1 = LOW , measurement
circuit 1, load circuit 1,C L = 15pF,
peak-to-peak
–
100
–
Oscillator frequency
Output frequency
Output clock jitter3
MHz
ps
1. Time from when INHN goes LOW until Q output goes high impedance.
2. Time from when either INHN goes LOW to HIGH or supply voltage V D D = 3.0V until normal signal output.
3. Measured values using NPC characteristics standard evaluation board and standard crystal.
NPC STANDARD CRYSTAL DATA
Cb
L
Ca
f (MHz)
R (Ω)
L (mH)
Ca (fF)
Cb (pF)
25
4.368
1.885
21.52
4.793
27
7.421
2.402
14.48
4.097
R
NIPPON PRECISION CIRCUITS—5
SM5050A
MEASUREMENT CIRCUITS
Measurement Circuit 1
Measurement Circuit 4
IDD
IST
A
IZ
VDDQ
VDDQ
XT
VDD
IZ
VDD
A
Q
X'tal
Q
XTN
INHN
INHN
VSSQ
VSSQ
VSS
V
VSS
Measurement Circuit 2
VOH
VOL
Load Circuit 1
3.0V
VDDQ
P0, P1,
INHN
VSSQ
VDD
VSS
V
RUP1 = VDD
IPR
(VIL = 0V)
Q output
RUP2 = VDD VIH
IPR
VDD = 3.0V
VIH = 2.1V
CL : 15pF
(Including probe capacitance)
VIH
VIL
IPR
A
Measurement Circuit 3
XT
VDDQ
VDD
Rf =
VDD
IRf
XTN
VSSQ
VSS
A
IRf
NIPPON PRECISION CIRCUITS—6
SM5050A
Switching Time Measurement Waveforms
Output duty level
0.8V DD
Q output
0.8V DD
0.2V DD
0.2V DD
DUTY measurement
voltage (0.5V DD )
TW
tr
tf
Output duty cycle time
DUTY measurement
voltage (0.5V DD)
Q output
TW
DUTY= TW/ T
T
100 (%)
Output Disable Delay Time/Startup Time
VIH
INHN
VIL
tPLZ
Q output
,,,,,,,,,
,,,,,,,,,
Hi-Z
,,,,,,,,,
,,,,,,,,,
INHN input waveform tr = tf
tSZL
,,,,,,,,
,,,,,,,,
,,,,,,,,
,,,,,,,,
10ns
NIPPON PRECISION CIRCUITS—7
SM5050A
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility fo r
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with expor t controls on the distribution or dissemination of the products. Customers shall not expor t, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome
Koto-ku, Tokyo 135-8430, Japan
Telephone: 03-3642-6661
Facsimile: 03-3642-6698
NC9921AE
2000.07
NIPPON PRECISION CIRCUITS—8
Similar pages