NJ88C33

NJ88C33 Frequency Synthesiser (I2C BUS Programmable) Advance Information DS2429 - 3.2 September 1994 The NJ88C33 is a synthesiser circuit fabricated on Mitel Semiconductor's 1.4 micron CMOS process, assuring very high performance. It is I2C compatible and can also be programmed at up to 5MHz. It contains a 16-bit R counter, a 12-bit N counter and a 7-bit A counter. A digital phase comparator gives improved loop stability with current source outputs to reduce loop components. A voltage doubler is provided for the loop driver to improve control voltage range to the VCO when operating at low supply voltages. DP14 FEATURES s s s s s s s s s Easy to Use Low Power Consumption (15mW) Single Supply 2.5V to 5.5V Digital Phase Comparator with Current Source Outputs Serial (I2C Compatible) Programming, 5MHz max Channel Loading in 8µs 150MHz Input Frequency Without Prescaler at 4.5V (52MHz at 2.7V) Standby Modes Use of Two-Modulus Prescaler is Possible MP14 Fig.1 Pin connections (not to scale) - top views ABSOLUTE MAXIMUM RATINGS Supply voltage, VDD Input voltage, VIM1 Output voltage on pin 13, VIM2 Storage temperature, Tstg -0.3V to 7V -0.3 to VDD +0.3V -VDD to 0V -55°C to +125°C APPLICATIONS s s s s s Cordless Telephones (CT2, DECT) Cellular Telephones (GSM, PCN, ETACS) Hand Held Marine Radios Sonarbuoys Video Clock generators ORDERING INFORMATION NJ88C33 MA DP (Industrial - Plastic DIL package) NJ88C33 MA MP (Industrial - Miniature Plastic DIL package) Fig.2 Simplified block d...