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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 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.
FEATURES
s s
PAD DIMENSIONS
(Unit: m)
s
s s
s s s s
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)
P1
P0
(2160,1570)
VSS VSSQ Q SA5050A INHN
XT
(0,0)
VDDQ VDD
XTN
PINOUT
(Top view )
Chip size: 2.16 x 1.57mm Chip thickness: 300 30m Chip base: V S S level
PACKAGE DIMENSIONS
(Unit: m m )
P1 VSS Q VDD
1 2 3 4
8 7 6 5
P0 INHN XT XTN
4.4 0.2 6.4 0.3
0 to 10
0.575 typ
ORDERING INFORMATION
D e vice CF5050A-1 SM5050AV P ackag e Chip form
3.1 0.3 1.15 0.05
0.15 -0.05
+0.1
0.10
0.22 0.1
0.1 0.05
8-pin V S O P
0.65
0.12 M
NIPPON PRECISION CIRCUITS--1
0.5 0.2
SM5050A
BLOCK DIAGRAM
VDD
VDDQ
XT XTN
Oscillator
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 Number 1 2 3 4 5 6 7 8 Name P1 VSS VSSQ Q VDD VDD XTN XT INHN P0 XTN XT INHN P0 906 1524 1870 1870 1540 240 240 542 1015 1330 - O I Ip Ip Supply Cr ystal oscillator connection pins. Cr ystal connected between XT and XTN. Operating state control (inhibit). When INHN is LOW , output is high impedance and PLL circuits stop. Program input 0. Selects the output frequency multiplier ratio. Q VDDQ 290 290 540 920 569 240 - O - Output circuit ground Output (CMOS) Output circuit supply Name X P1 VSS 620 290 Y 1330 1132 Ip - Program input 1. Selects the output frequency multiplier ratio. Ground CF5050A P ad dimensions [m] I/O 1 Description
1. Ip = input with built-in pull-up resistor.
NIPPON PRECISION CIRCUITS--2
SM5050A
OUTPUT FREQUENCY SETTINGS
Program inputs Multiplier ratio P0 LOW LOW HIGH P1 LOW HIGH LOW x4 x 4.25 x5 Master clock frequency [MHz] 25.00 25.00 25.00 26.66 24.8832 26.66 Output frequency [MHz] 100 106.25 125 133.3 155.52 166.6 3.0 to 3.6 2.7 to 3.6 Supply voltag e [V]
HIGH
HIGH
x 6.25
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 Supply voltage range Input voltage range Output voltage range Storage temperature range Operating temperature range Output current Pow er dissipation Symbol VDD V IN VOUT CF5050A T stg T opr IO U T PD SM5050AV SM5050AV Condition Rating -0.5 to 6.0 -0.5 to V D D + 0.5 -0.5 to V D D + 0.5 -65 to 150 -55 to 125 -40 to 85 25 150 Unit V V V C C C mA mW
Recommended Operating Conditions
VSS = 0V, fOUT = 100 to 166.6MHz, CL = 15pF
Rating P arameter Symbol Condition min Operating supply voltage Input voltage Operating temperature VDD V IN T opr fO U T 1 2 5 M H z fO U T 166.6MHz 2.7 3.0 VSS -20 typ - - - - max 3.6 V 3.6 VDD 80 V C Unit
NIPPON PRECISION CIRCUITS--3
SM5050A
DC Characteristics
VDD = 2.7 to 3.6V, VSS = 0V, Ta = -20 to 80C unless otherwise noted
Rating P arameter Q HIGH-level output voltage Q L OW -level output voltage Q output leakage current INHN HIGH-level input voltage P0, P1 HIGH-level input voltage I N H N L OW -level input voltage P0, P1 LOW -level input voltage Symbol VOH VOL IZ V IH1 V IH2 V IL1 V IL2 25MHz cr ystal, measurement circuit 1, load circuit 1, INHN = open, C L = 15pF, P0 = HIGH, P1 = LOW , V D D = 3.0V 25MHz cr ystal, measurement circuit 1, load circuit 1, INHN = open, C L = 15pF, P0 = HIGH, P1 = LOW INHN = V S S , measurement circuit 1 V D D = 3V, measurement circuit 2 V D D = 3V, Ta = 25 C , f = 30MHz Measurement circuit 3 Design values 15.98 18.44 20.90 pF Condition min V D D = 2.7V, IO H = 8mA V D D = 2.7V, IO L = 8mA Measurement circuit 4, INHN = V S S VOH = VDD VOL = VSS 2.2 - - - 0.7V D D 0.9V D D - - - typ - - - - - - - - 23 max - 0.4 10 A 10 - - 0.3V D D 0.1V D D - mA - - 0.3 10 - 100 15.98 - - - - -240 300 18.44 42 40 6 200 - 900 20.90 A M k k pF V V V V V V Unit
Current consumption
ID D
Standby current INHN, P0, P1 input pull-up resistance Negative resistance Feedback resistance Internal capacitance
IS T RUP1 RUP2 -R L Rf CG CD
NIPPON PRECISION CIRCUITS--4
SM5050A
Switching Characteristics
VDD = 2.7 to 3.6V, VSS = 0V, Ta = -20 to 80C unless otherwise noted
Rating P arameter Symbol Condition min Output rise time Output fall time tr tf 0.2V D D 0.8V D D , measurement circuit 1, load circuit 1, C L = 15pF 0.8V D D 0.2V D D , measurement circuit 1, load circuit 1, C L = 15pF V D D = 3V, Ta = 25 C , measurement circuit 1, load circuit 1, C L = 15pF, f 166.6MHz V D D = 3V, Ta = 25 C , measurement circuit 1, load circuit 1, C L = 15pF V D D = 3V, Ta = 25 C , measurement circuit 1, load circuit 1, C L = 15pF Measurement circuit 1 Measurement circuit 1 V D D = 2.7V V D D = 3.0V 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 - - typ 1 1 max 2.5 2.5 ns ns Unit
Output duty cycle
Duty
40
-
60
%
Output disable delay time 1 Star tup time 2 ,3 Oscillator frequency Output frequency
tP L Z tS Z L f fO U T
- - 20 100 100
- 1 - - -
100 - 40 125
ns ms MHz MHz
166.6
Output clock jitter3
Jitter
-
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 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
f (MHz) 25 27
R () 4.368 7.421
L (mH) 1.885 2.402
Ca (fF) 21.52 14.48
Cb (pF) 4.793 4.097
L
Ca
R
NIPPON PRECISION CIRCUITS--5
SM5050A
MEASUREMENT CIRCUITS
Measurement Circuit 1 Measurement Circuit 4
A
VDDQ
IDD IST IZ VDDQ VDD Q Q INHN VSSQ VSS IZ
XT X'tal XTN INHN
VDD
A V
VOH VOL
VSSQ
VSS
Measurement Circuit 2
Load Circuit 1
3.0V VDDQ VDD
RUP1 = VDD IPR
(VIL = 0V)
Q output
CL : 15pF
(Including probe capacitance)
P0, P1, INHN
VSSQ
VSS
V
VIH VIL IPR
RUP2 = VDD VIH IPR VDD = 3.0V VIH = 2.1V
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
Q output
0.8VDD 0.2VDD TW
0.8VDD 0.2VDD
DUTY measurement voltage (0.5V DD)
tr
Output duty cycle time
tf
Q output
TW T
DUTY measurement voltage (0.5VDD)
DUTY= TW/ T
100 (%)
Output Disable Delay Time/Startup Time
INHN
VIL
VIH
tPLZ Q output
tSZL
,,,,,,,,, ,,,,,,,,, Hi-Z ,,,,,,,,, ,,,,,,,,,
INHN input waveform
,,,,,,,, ,,,,,,,, ,,,,,,,, ,,,,,,,,
10ns
tr = tf
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. 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 INC.
NIPPON PRECISION CIRCUITS--8

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