SP8782A

SP8782A & B SP8782A & B 1GHz ÷ 16/17, ÷32/33 Multi-Modulus Divider DS3651 Issue 2.4 June 1999 Features q q q q Advanced Resynchronisation techniques to negate loop delay effects CMOS compataible output capability Multi-Modulus division Available as DESC SMD 5962-9208901MPA Odering Information SP8782 A DG SP8782 B MP DES9208901/AC/DGAZ(SMD) Description The SP8782 is a multi-modulus divider which divides by 16/ 17 when the Ratio Select input is low and by 32/33 when theRatio Select input is high. When high, the modulus Control input selects the lower division ratio (16 or 32) and the higher ratio (17 or 33) when it is low. The device uses resynchronisation techniques to reduce the effects of propagation delays in frequency synthesis. The SP8782A (ceramic DIL package) is characterised over the full military temperature range of -55°C to +125°C, the SP8782B (miniature plastic DIL package) over the industrial range of -40°C to+85°C. Absolute Maximum Ratings Supply Voltage Clock input level Junction temperature Storage temperature range: SP8782A SP8782B 6V 2.5V p-p +175°C -55°C to +150°C -55°C to +125°C RATIO SELECT 1 VCC 2 CLOCK INPUT CLOCK INPUT 2 3 ÷ 16/17 ÷ 32/33 7 OUTPUT 4 VEE 5 MODULUS CONTROL INPUT Figure 1 Functional Diagram 1 SP8782A & B RATIO SELECT CLOCK INPUT CLOCK INPUT VEE 1 2 3 4 8 7 6 5 VCC OUTPUT NC MODULUS CONTROL DG 8 RATIO SELECT CLOCK INPUT CLOCK INPUT VEE 1 2 3 4 8 7 6 5 VCC OUTPUT NC MODULUS CONTROL MP 8 Figure 2 Typical Pin Connections Electrical Characteristics Unless otherwise stated, the Electrical Characteristics are guaranteed over the specified supply, frequency and temperature range. Supply Voltage, VCC = +4V to +5.5V, VEE = 0V Temperature Tamb= -55°C to +125°C, (SP8782A), -40°C to +85° C (SP8782B) Characteristic Maximum frequency (sinewave input) Minimum frequency Min Slew rate for low frequency operation Power Supply current, ICC Output low voltage Output high voltage Modulus control input high voltage Modulus control input low voltage Modulus control input high current Modulus control input low current Ratio select input high voltage Ratio selected input low voltage Ratio select input current Clock to output propagation Delay Set-up time, ts Release time,tr Pin 2, 3 2, 3 2, 3 8 7 7 5 5 5 5 1 1 1 2,3,7 5,7 5,7 Value Min 1 50 100 60 1.7 VCC VCC 0.3VCC 1.2 -1.2 VCC 0.4VCC 10 3 Conditions Max Units GHz MHz V/µs mA V V V V mA mA V V µA ns ns ns Input = 200-1200mVp-p Input = 400-1200mVp-p Output unloaded, VCC=5.5V 0 VCC-1.4 0.7VCC 0 0.6 -0.6 0.6VCC 0 -10 3 3 At driver end of 3kΩ resistor At driver end of 3kΩ resistor Via 3kΩ resistor to VCC Via 3kΩ resistor to VCC See note 1 and Fig. 3a See note 2 and Fig. 3b Notes: 1. The set-up time ts is defined as the minimum time that can elapse between L→H transition of the modulus control input and the next L→H output transition to ensure that the ÷ 16 (32) mode is obtained. 2. The release time tr is defined as the minimum time that can elapse between H→L transition of the modulus control input and the next L→H output transition to ensure that the ÷ 17 (33) mode is obtained. 2 SP8782A & B Modulus control input 0 1 Ratio select input 0 1 ÷17 ÷16 ÷33 ÷32 Table 1 Truth table for control inputs CLOCK INPUT t s MODULUS CONTROL INPUT DON’T CARE t s DON’T CARE 9 (17) OUTPUT 8 (16) 8 (16) 8 (16) DIVIDE-BY-16 (32) MODE ESTABLISHED Fig. 3a Setting divide-by-16 Figure 3a Setting divide - by - 16 (32 mode) (32) mode CLOCK INPUT t r MODULUS CONTROL INPUT DON’T CARE t r DON’T CARE 8 (16) OUTPUT 8 (16) 9 (17) EXTRA PULSE 8 (16) DIVIDE-BY-17 (33) MODE ESTABLISHED Figure 3b Setting divide - by - 17 (33 mode) Figure 3 Timing diagrams 3 SP8782A & B 1600 1400 INPUT AMPLITUDE (mV p-p) 1200 1000 * Tested as specified 800 600 400 200 0 GUARANTEED OPERATING WINDOW * in table of speci *Tested as Electrical iCharacteristics E n table of Characteristi 0 200 400 INPUT FREQUENCY (MHz) 600 800 Figure 4 Typical input characteristics RATIO SELECT 1 6 8 V CC 10n MODULUS CONTROL INPUT CLOCK INPUT 3k 5 7 OUTPUT 1n 2 NOTES 1. Pin 6 is grounded to improve isolation between the output and the NOTES modulus control input. 1n 1. 2.The 6 is grounded onimprove Pin 3kΩ resistor pin5 reduces to the amplitude the moduluscontrol of isolation minimise radiation. signal to between the output and the modulus control input 2. The 3kΩ resistor on pin 5 reduces the amplitude of the modulus control signal to minimise radiation DIVIDE DIVIDE BY BY 16/17 16/17 OR 32/33 OR 32/33 3 4 V EE Figure 5 Typical application showing interfacing 4 SP8782A & B j1 j 0.5 j2 j 0.2 1100 j5 0 0.2 0.5 1000 1 2 5 800 200 2 j5 2 j 0.2 600 400 2 j 0.5 2 j1 2 j2 Figure 6 Typical input impedance. Test conditions: supply voltage =5V, ambient temperature =25°C, frequencies in MHz, impedances normalised to 50Ω 5 http://www.mitelsemi.com World Headquarters - Canada Tel: +1 (613) 592 2122 Fax: +1 (613) 592 6909 North America Tel: +1 (770) 486 0194 Fax: +1 (770) 631 8213 Asia/Pacific Tel: +65 333 6193 Fax: +65 333 6192 Europe, Middle East, and Africa (EMEA) Tel: +44 (0) 1793 518528 Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. However, Mitel assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. 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