Features
• 2.3 V to 3.6 V supply (4.8 V AMR)
• High speed:
– Characterized from 16 MHz to 120 MHz
• CMOS output, meets JEDEC
• Divided-frequency single output
• Low power
• TTL compatible
• Enable/disable function
• Immunity to radiations:
– 300 krad(Si) TID
– SEL free up to 125 MeV.cm²/mg
– SET free up to 125 MeV.cm²/mg
• SMD 5962F20207
• Mass: 0.42 g

Description
The RHFOSC04 is a crystal oscillator driver and divider. It consists of an oscillator
section and 4-stage ripple-carry binary counter. The oscillator section allows the
implementation of crystal oscillator circuits. The output is buffered and it is controlled
by a 2-bit digital cell to deliver one among four divided frequency, from F to F/2, F/4
and F/8 frequencies. A disable function is available to set the circuit in power-down
mode while keeping a high impedance output.
Designed in rad-hard rules on robust CMOS technology already proven in space, the
RHFOSC04 shows an excellent stability in total-ionizing-dose (TID) up to 300
krad(Si) and it is SEL-free and SET-free up to 125 MeV.cm²/mg.
It comes in hermetic ceramic Flat-10 lead, and can operate from -55 °C to +125 °C
ambient temperature.

Applications
• Oscillators for space systems