MECL PLL COMPONENTS ÷64/65, ÷128/129 DUAL MODULUS PRESCALER
The MC12022A can be used with CMOS synthesizers requiring positive edges to trigger internal counters such as Motorola’s MC145XXX series in a PLL to provide tuning signals up to 1.1GHz in programmable frequency steps.
The MC12022B can be used with CMOS synthesizers requiring negative edges to trigger internal counters.
A Divide Ratio Control (SW) permits selection of a 64/65 or 128/129 divide ratio as desired. The Modulus Control (MC) selects the proper divide number after SW has been biased to select the desired divide ratio.
• 1.1 GHz Toggle Frequency
• Supply Voltage of 4.5 to 5.5 V
• Low–Power 7.5 mA Typical
• Operating Temperature Range of –40 to +85°C
• Short Setup Time (tset) 16ns Maximum @ 1.1 GHz
• Modulus Control Input Level Is Compatible With Standard CMOS and TTL. Maximum Input Voltage Should Be Limited to 6.5 Vdc