DA9271.005 13 July 2006 MAS9271 IC FOR 10.00 – 40.00 MHz PXO • • • • • • • Low Power Wide Supply Voltage Range CMOS (Square Wave) Output Very High Level of Integration Electrically Trimmable Very Low Phase Noise Low Cost DESCRIPTION The MAS9271 is an integrated circuit well suited to make initial offset trimming of the crystal in oscillator. The trimming is done by a serial bus and the calibration information is stored in an internal PROM. FEATURES • • • • • To build a Precision Crystal Oscillator (PXO) only one additional component, a crystal is needed. APPLICATIONS Very small size Minimum current draw Wide operating temperature range Phase noise <-130 dBc/Hz at 1 kHz offset Square wave output • • • PXO for data terminals PXO for telecommunication applications PXO for computer application BLOCK DIAGRAM PD MAS9271 OUT DA CLK PV 5 Digital 3 VDD VSS X1 X2 X'Tal 1 (5) DA9271.005 13 July 2006 PIN DESCRIPTION Pin Description Symbol x-coordinate y-coordinate Power Supply Voltage Crystal Oscillator Output Crystal/Varactor Oscillator Input Tri State Serial Bus Clock Input Serial Bus Data Input Buffer Output VDD X1 X2 PD CLK DA OUT 177 374 817 1012 201 435 665 172 158 158 158 1015 1015 1015 Power Supply Ground Programming Input VSS PV 830 1042 1008 1015 Note Note: Also available in AK2140 pin order. Note: Because the substrate of the die is internally connected to VDD, the die has to be connected to VDD or left floating. Please make sure that VDD is the first pad to be bonded. Pick-and-place and all component assembly are recommended to be performed in ESD protected area. Note: Pad coordinates measured from the left bottom corner of the chip to the center of the pads. The coordinates may vary depending on sawing width and location, however, distances between pads are accurate. ABSOLUTE MAXIMUM RATINGS Parameter Symbol Min Max Unit Supply Voltage Input Voltage Power Dissipation Storage Temperature VDD - VSS VIN PMAX TST -0.3 VSS -0.3 6.0 VDD + 0.3 100 150 V V mW o C -55 Note 1) Note: Not valid for programming pin PV RECOMMENDED OPERATION CONDITIONS Parameter Supply Voltage Supply Current Operating Temperature Crystal Load Capacitance Symbol VDD ICC TC CL Conditions Min Typ Max Unit 2.5 2.8 2.3 5.5 V mA o C pF Vdd = 2.8 Volt -40 +85 8.0 2 (5) DA9271.005 13 July 2006 ELECTRICAL CHARACTERISTICS (recommended operation conditions) Parameter Frequency Range Symbol Min fo 10.00 Typ Max Unit Note 40.00 MHz 1) Output Voltage (10 pF, Vdd 2.7V) Vout 2.3 Vpp Output Voltage (10 pF, Vdd 5.0V) Vout 4.5 Vpp Rise and Fall Time (10 - 50pF) Output Symmetry Crystal Load CG Startup Time TSTART 10 ns 45 55 % 5.1 11.5 pF 2 2) ms Negative Resistance in Maximum NegR 85 Ω CDAC Load at 32 MHz Negative Resistance in Maximum NegR 40 Ω CDAC Load at 40 MHz Tri State Output Buffer PD V 3) ON State 1.6 VDD OFF State 0 0.55 Note 1: Rs < 10 Ω crystal provides typically a maximum frequency of 40 MHz and Rs<30 Ω a maximum frequency of 32 MHz. With Rs = 50 Ω crystal the maximum frequency is typically 26 MHz. Note 2: Crystal Load is at minimum when all CDAC bits are 0s, and at maximum when all CDAC bits are 1s Note 3: If the Tri State Output Buffer pin is floating (i.e. PD pin is not connected), the Oscillator is in ON state. IC OUTLINES CLK DA OUT VSS PV 1182 µm MAS9271 VDD X1 X2 PD Die map reference 1200 µm Note 1: Also available in AK2140 pin order. Note 2: MAS9271 pads are round with 80 µm diameter at opening. Note 3: Pins PV, CLK and DA must not be connected in PXO module end-user application. 3 (5) DA9271.005 13 July 2006 SAMPLES IN SB20 DIL PACKAGE 1 20 VDD 2 19 3 18CLK 4 17 DA 6 MAS9271 YYWW XXXXX.X X1 5 16 OUT 15GND X2 7 14 8 13 9 12 PV PD 10 Top marking: YYWW = Year, Week XXXXX.X = Lot number 11 4 (5) DA9271.005 13 July 2006 ORDERING INFORMATION Product Code Product Package Comments MAS9271A1TG00 IC FOR PXO Tested wafers 215 µm Die size 1200 x 1182 µm Please contact Micro Analog Systems Oy for other wafer thickness options. Please contact Micro Analog Systems Oy for other pin order. LOCAL DISTRIBUTOR MICRO ANALOG SYSTEMS OY CONTACTS Micro Analog Systems Oy Kamreerintie 2, P.O. Box 51 FIN-02771 Espoo, FINLAND Tel. +358 9 80 521 Fax +358 9 805 3213 http://www.mas-oy.com NOTICE Micro Analog Systems Oy reserves the right to make changes to the products contained in this data sheet in order to improve the design or performance and to supply the best possible products. Micro Analog Systems Oy assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights unless otherwise specified in this data sheet, 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 Micro Analog Systems Oy makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. 5 (5)