MPC990 Freescale Semiconductor, Inc, MPC990 Datasheet
MPC990
Related parts for MPC990
MPC990 Summary of contents
Page 1
... Qd outputs between sync signals and extensions to the Qc bank of outputs. The MPC990/991 provides a separate output for the feedback to the PLL. This allows for the feedback frequency to be programmed independently of the other outputs allowing for unique input vs output frequency relationships. The fselFB inputs provide 6 different feedback frequencies from the QFB differential output pair ...
Page 2
... MPC990 MPC991 39 38 Qb3 40 41 Qb3 42 VCCO Qa0 43 Qa0 44 Qa1 45 Qa1 46 47 Qa2 48 Qa2 Qa3 49 Qa3 50 SYNC_Sel 51 52 VCO_Sel 1 FUNCTION TABLE 1 fsel3 fsel2 MOTOROLA 37 36 ...
Page 3
... Ref_Sel xtal or ECL/PECL SYNC_Sel PHASE VCO DETECTOR LPF FREQUENCY GENERATOR SYNC Figure 2. MPC990/991 Logic Diagram 3 MPC990 MPC991 Logic ‘0’ Logic ‘1’ Enable PLL Bypass PLL fVCO fVCO/2 Test_Clk — Reset Outputs SYNC Outputs Match Qc Outputs Qa0 Qa0 ...
Page 4
... MPC990 MPC991 Qa Qc Sync (Qd Sync (Qd Sync (Qd Sync (Qd Sync (Qd) MOTOROLA 1:1 Mode 2:1 Mode 3:1 Mode 3:2 Mode 4:3 Mode Figure 3. Timing Diagrams TIMING SOLUTIONS BR1333 — Rev 6 ...
Page 5
... Min Typ 10 0.2 47.5 50 Same Frequency 150 250 VCO_Sel = ‘0’ 400 VCO_Sel = ‘1’ 200 75 250 Qa,Qb, Qa,Qb, Qa,Qb, MPC990 MPC991 70 C Max Min Typ Max Unit –0.7 –1.3 –0.7 V –1.4 –2.0 –1.4 V –0.9 –1.1 –0.9 V –1.5 –1.8 –1.5 V ...
Page 6
... The on–board oscillator is completely self contained so that the only external component required is the crystal. As the oscillator is somewhat sensitive to loading on its inputs the user is advised to mount the crystal as close to the MPC990 as possible to avoid any board level parasitics. To facilitate co–location surface mount crystals are recommended, but not required ...
Page 7
... DC voltage drop that will be seen between the V CC supply and the VCCA pin of the MPC990/991. From the data sheet the I VCCA current (the current sourced through the VCCA pin) is typically 15mA (20mA maximum), assuming that a minimum of 3 ...
Page 8
... MPC990 MPC991 4X 0.20 (0.008) H L– VIEW Y 3X –L– –N– θ –H– –T– θ3 SEATING 4X PLANE 0.05 (0.002 VIEW AA MOTOROLA OUTLINE DIMENSIONS FA SUFFIX TQFP PACKAGE CASE 848D-03 ISSUE TIPS 0.20 (0.008) T L–M ...
Page 9
... Mfax : RMFAX0@email.sps.mot.com – TOUCHTONE 602–244–6609 INTERNET: http://www.mot.com/sps/ TIMING SOLUTIONS BR1333 — Rev 6 MPC990 MPC991 are registered trademarks of Motorola, Inc. Motorola, Inc Equal JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 81–3–3521–8315 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd. ...