1.1 GHz Low Power Dual Modulus Prescaler

The MC12038A 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 1.1 GHz in programmable frequency steps.

A Divide Ratio Control (SW) permits selection of a 127/128 or 255/256 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 4.8 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

• On–Chip Output Termination