MPC991FA Motorola, MPC991FA Datasheet
MPC991FA
Available stocks
Related parts for MPC991FA
MPC991FA Summary of contents
Page 1
... VCO_Sel pin is low. This will also prevent the PLL from achieving lock. Again, a master reset signal will need to be applied to allow for phase–lock. The device employs a power–on reset circuit which will ensure output synchronization and PLL lock on initial power–up. 2/97 Motorola, Inc. 1997 1 REV 2 MPC990 ...
Page 2
... MOTOROLA MPC990/ MPC991 Figure 1. 52–Lead Pinout (Top View) INPUTS fsel1 fsel0 ...
Page 3
... Bypass PLL fVCO fVCO/2 Test_Clk — Reset Outputs SYNC Outputs Match Qc Outputs Qa0 Qa0 Qa1 Qa1 Qa2 Qa2 Qa3 Qa3 Qb0 Qb0 Qb1 Qb1 Qb2 Qb2 Qb3 Qb3 Qc0 Qc0 Qc1 Qc1 Qc2 Qc2 Qd0 Qd0 Qd1 Qd1 QFB QFB MOTOROLA ...
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
... Common Mode Range I IH Input HIGH Current I GNDI Power Supply Current 1. Refer to Motorola Application Note AN1545/D “ Thermal Data for MPC Clock Drivers ” for thermal management guidelines. PECL DC CHARACTERISTICS ( CCA = V CCI = V CCO = 3.3V 5%, GNDI = 0V, Note 2.) Symbol Characteristic V OH Output HIGH Voltage (Note 3 ...
Page 6
... For a design which utilizes the external feedback to the PLL the selection of the crystal frequency is straight forward; simply chose a crystal which is equal in frequency to the fed back signal. MOTOROLA Min Note 6. Note 6. 25 APPLICATIONS INFORMATION Table 1 ...
Page 7
... The power supply filter schemes discussed in this section should be adequate to eliminate power supply noise related problems in most designs =5–15 VCCA 0.01 F MPC990/991 VCC Figure 4. Power Supply Filter 7 3. 0.01 F MOTOROLA ...
Page 8
... VIEW Y 3X –L– –N– –H– –T– 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– 0.10 (0.004) T ...
Page 9
... Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...