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