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SM5050A
NIPPON PRECISION CIRCUITS INC.
Single-output Clock Generator IC
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 C
and C
G
are built-in, realizing a high-frequency output
D
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.
FEATURES
■
2.7 to 3.6V operating supply voltage
■
20 to 40MHz master clock frequency (fundamental)
■
Output frequency ranges
• 100 to 166.6MHz (V
• 100 to 125MHz (V
■
8mA output drive capability
■
Oscillator capacitors (C
tor (R
) built-in
■
■
■
■
f
100ps (typ) low jitter output (peak-to-peak)
2 program inputs for 4 selectable multiplier ratios
Standby function
Packaging
DD
DD
= V
G
= V
, C
= 3.0 to 3.6V)
DDQ
= 2.7 to 3.6V)
DDQ
) and feedback resis-
D
PAD DIMENSIONS
(Unit: µm)
P1 P0
VSS
VSSQ
Q
SA5050A
(0,0)
VDDQ
VDD XTN
(2160,1570)
INHN
XT
• Chip form (CF5050A)
• 8-pin VSOP package (SM5050AV)
Chip size: 2.16
Chip thickness: 300 ± 30µm
Chip base: V
1.57mm
level
SS
PINOUT
(Top view )
1P1
2VSS
3Q
VDD
4
ORDERING INFORMATION
De vice Pack ag e
CF5050A–1 Chip form
SM5050AV 8-pin VSOP
8P0
7 INHN
6XT
5
XTN
PACKAGE DIMENSIONS
(Unit: mm )
6.4 ± 0.3
4.4 ± 0.2
0.575 typ
3.1 ± 0.3
1.15 ± 0.05
0.65
0.10
0.1 ± 0.05
0.22 ± 0.1
NIPPON PRECISION CIRCUITS—1
0.12
0 to 10
0.5 ± 0.2
0.1
+
0.05
−
0.15
M
BLOCK DIAGRAM
SM5050A
VDDQ
Duty
Control
Circuit
VSSQVSS
XT
XTN
P0
P1
INHN
Oscillator R-counter
Control
Circuit
Phase
Detector
N-counter
Charge
Pump
VDD
LPF Q
VCO
PIN DESCRIPTION
SM5050AV CF5050A
1
Number Name Name
1 P1 P1 620 1330 Ip Program input 1. Selects the output frequency multiplier ratio.
2 VSS
VSSQ 290 920 – Output circuit ground
3 Q Q 290 5 69 O Output (CMOS)
VDDQ 540 240 – Output circuit supply
4 VDD
5 X TN X TN 1524 240 O
6 XT X T 1870 542 I
7 INHN INHN 1870 1015 Ip
8 P0 P0 1540 1330 Ip Program input 0. Selects the output frequency multiplier ratio.
1. Ip = input with built-in pull-up resistor.
Pad dimensions [µm]
XY
VS S 290 1132 – Ground
VD D 906 240 – Supply
I/O
Cr ystal oscillator connection pins.
Crystal connected between XT and XTN.
Op erating state control (inhibit).
When INHN is LOW, output is high impedance and PLL circuits stop.
Description
Output
Buffer
NIPPON PRECISION CIRCUITS—2
×
×
×
×
−
−
−
−
°
−
°
−
°
OUTPUT FREQUENCY SETTINGS
−
°
SM5050A
Program inputs
P0 P1
LOW LOW
Multiplier ratio
4 25.00 100
4.25 25.00 106.25
Master clock
frequency [MHz]
Output frequency
[MHz]
Supply voltag e [V]
2.7 to 3.6LOW HIGH
25.00 125
HIGH LOW
5
26.66 133.3
HIGH HIGH
6.25
24.8832 155.52
3.0 to 3.6
26.66 166.6
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
V
= 0V
SS
Parameter Symbol Condition Rating Unit
Supply voltage range V
Input voltage range V
Output voltage range V
Storage temperature range T
Operating temperature range T
Output current I
Po w er dissipation P
DD
IN
OUT
CF5050A
stg
SM5050AV
opr
OUT
SM5050AV 150 m W
D
0.5 to 6.0 V
0.5 to V
0.5 to V
+ 0.5 V
DD
+ 0.5 V
DD
65 to 150
55 to 125
40 to 85
25 mA
C
C
C
Recommended Operating Conditions
V
= 0V, f
SS
Operating supply voltage V
Input voltage V
Operating temperature T
= 100 to 166.6MHz, C
OUT
= 15pF
L
Parameter Symbol Condition
f
≤ 125MHz 2.7 – 3.6
OUT
DD
f
≤ 166.6MHz 3.0 – 3.6
OUT
IN
opr
Rating
min typ max
V
SS
–V
DD
20 – 80
NIPPON PRECISION CIRCUITS—3
Unit
V
V
C
DC Characteristics
V
= 2.7 to 3.6V, V
DD
SS
SM5050A
= 0V, Ta = − 20 to 80 ° C unless otherwise noted
−
°
−
Parameter Symbol Condition
Q HIGH-level output voltage V
Q L O W -level output voltage V
Q output leakage current I
INHN HIGH-level input voltage V
P0, P1 HIGH-level input voltage V
INHN LOW-level input voltage V
P0, P1 LOW -level input voltage V
Current consumption I
Standby current I
INHN, P0, P1 input pull-up
resistance
R
R
Negative resistance
Feedback resistance R
Internal capacitance
Rating
min typ max
V
OH
OL
Z
IH1
IH2
IL1
IL2
= 2.7V, I
DD
V
= 2.7V, I
DD
Measurement circuit 4,
INHN = V
= 8mA 2.2 – – V
OH
= 8mA – – 0.4 V
OL
V
SS
= V
OH
DD
V
= V
OL
SS
––10
––10
0.7V
0.9V
DD
DD
––V
––V
– – 0.3V
– – 0.1V
25MHz crystal, measurement circuit 1,
load circuit 1, INHN = open, C
P0 = HIGH, P1 = LOW, V
DD
25MHz crystal, measurement circuit 1,
load circuit 1, INHN = open, C
P0 = HIGH, P1 = LOW
INHN = V
ST
UP1
V
UP2
R
C
C
G
DD
V
L
DD
Measurement circuit 3 100 3 00 9 00 k Ω
f
Design values
D
, measurement circuit 1 – – 4 0 µ A
SS
= 3V, measurement circuit 2
= 3V, Ta = 25
C, f = 30MHz –
= 3.0V
DD
= 15pF,
L
= 15pF,
L
–23–
––42
0.3 – 6 M Ω
10 – 200 k Ω
240 –
15.98 18.44 20.90 pF
15.98 18.44 20.90 pF
DD
DD
Unit
µA
V
V
mA
Ω
NIPPON PRECISION CIRCUITS—4
Switching Characteristics
→
→
V
= 2.7 to 3.6V, V
DD
= 0V, Ta = − 20 to 80 ° C unless otherwise noted
SS
SM5050A
°
°
°
°
Parameter Symbol Condition
Output rise time t
Output fall time t
r
f
Output duty cycle Duty
Output disable delay time
Startup time
2,3
1
t
PLZ
t
SZL
0.2V
circuit 1, load circuit 1, C
0.8V
circuit 1, load circuit 1, C
V
circuit 1, load circuit 1, C
f ≤ 166.6MHz
V
circuit 1, load circuit 1, C
V
circuit 1, load circuit 1, C
DD
DD
= 3V, Ta = 25
DD
= 3V, Ta = 25
DD
= 3V, Ta = 25
DD
0.8V
, measurement
DD
0.2V
, measurement
DD
C, measurement
C, measurement
C, measurement
= 15pF
L
= 15pF
L
= 15pF,
L
= 15pF
L
= 15pF
L
min typ max
– 1 2.5 n s
– 1 2.5 n s
40–60%
– – 100 ns
–1–ms
Unit
Oscillator frequency f Measurement circuit 1 20 – 40 M H z
Rating
V
= 2.7V 1 00 – 1 25
Output frequency f
Output clock jitter
3
OUT
Jitter
Measurement circuit 1
V
= 3V, Ta = 25
DD
P0 = HIGH, P1 = LOW, measurement
circuit 1, load circuit 1,C
peak-to-peak
DD
V
= 3.0V 1 00 – 166.6
DD
C, 25MHz cr ystal,
= 15pF,
L
MHz
– 100 – 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
3. Measured values using NPC characteristics standard evaluation board and standard crystal.
= 3.0V until normal signal output.
DD
NPC STANDARD CRYSTAL DATA
L
Cb
Ca R
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
NIPPON PRECISION CIRCUITS—5
MEASUREMENT CIRCUITS
SM5050A
Measurement Circuit 1
INHN
VDDQ
VSSQ
XT
X'tal
XTN
Measurement Circuit 2
3.0V
VDD
VSS
IPR
P0, P1,
INHN
A
VDDQ
VSSQ
V
VIH
VIL
Measurement Circuit 4
IDD
A
IST
VDD
VSS
VSSQ
VDD
Q
VSS
VDDQ
Q
INHN
IZ
IZ
A
V
VOH
VOL
Load Circuit 1
VDD
=
RUP1
R
UP2 =
IPR
V
DD VIH
(VIL = 0V)
PR
I
VDD = 3.0V
V
IH = 2.1V
Q output
CL : 15pF
(Including probe capacitance)
Measurement Circuit 3
XT
XTN
A
IRf
VDDQ
VSSQ
VDD
VSS
Rf =
V
DD
IRf
NIPPON PRECISION CIRCUITS—6
SM5050A
Switching Time Measurement Wavef orms
Output duty level
Q output
0.8VDD
0.2VDD
TW
tr tf
Output duty cycle time
Q output
TW
T
Output Disable Delay Time/Startup Time
INHN
VIL
tPLZ
0.8VDD
0.2VDD
DUTY measurement
voltage (0.5V
DUTY measurement
voltage
DUTY= T
VIH
DD)
(0.5VDD)
W/ T 100 (%)
tSZL
Q output
Hi-Z
INHN input waveform tr = tf 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 for
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 export controls on the distribution or dissemination of the products. Customers shall not export, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome
Koto-ku, Tokyo 135-8430, Japan
NIPPON PRECISION CIRCUITS INC.
Telephone: 03-3642-6661
Facsimile: 03-3642-6698
NC9921AE 2000.07
NIPPON PRECISION CIRCUITS—8
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