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SP8854E Datasheet(PDF) 2 Page - Zarlink Semiconductor Inc |
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SP8854E Datasheet(HTML) 2 Page - Zarlink Semiconductor Inc |
2 / 14 page HC44 SP8854E 2.7GHz Parallel Load Professional Synthesiser Preliminary Information DS4238 ISSUE 2.0 June 1998 Ordering Information SP8854E KG HCAR Non-standard temperature range, 255 °C to 1100°C, standard product screening SP8854E IG HCAR Industrial temperature range, 240 °C to 185°C, standard product screening The SP8854E is one of a family of parallel load synthesisers containing all the elements apart from the loop amplifier to fabricate a PLL synthesis loop. Other parts in the series are the SP8852E which is fully programmable, requiring tw0 16- bit words to set the RF and reference counters and the SP8855E which is fully programmable using hard wired links or switches. The SP8854E is programmed using a 16-bit parallel data bus. Data is stored in an internal buffer. The 10-bit program- mable reference divider is programmed by connecting the 10 programming pins either to ground or 15V. The device can therefore be programmed with a single transfer from the control microprocessor. Hard wired inputs can also control the FPD and FREF outputs and the control sense of the loop. Features • 2·7 GHz Operating Frequency • Single 5V Supply • Low Power Consumption <1·3W • High Comparison Frequency : 20MHz • High Gain Phase Detector : 1mA/rad • Zero ‘Dead Band’ Phase Detector • Wide Range of RF and Reference Division Ratios • Programming by Single Word Data Transfer Absolute Maximum Ratings Supply voltage Operating temperature Storage temperature Prescaler and reference input voltage Data inputs Junction temperature 20·3V to 16V 255 °C to1100°C 265 °C to 1150°C 2·5V p-p VCC 10·3V VEE 20·3V 1175 °C Figure 1 - Pin connections - top view *FPD and FREF outputs are reversed using the control direction input, pin 23. The above diagram is correct when pin 23 is high. 144 DATA BIT 4 DATA BIT 3 DATA BIT 2 DATA BIT 1 DATA BIT 0 0V (PRESCALER) RF INPUT RF INPUT VCC (PRESCALER) VEE LOCK DETECT STROBE REF DIV BIT 0 REF DIV BIT 1 REF DIV BIT 2 REF DIV BIT 3 REF DIV BIT 4 REF DIV BIT 5 REF DIV BIT 6 REF DIV BIT 7 REF DIV BIT 8 REF DIV BIT 9 SP8854E |
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