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ISL74420M - Radiation Tolerant Quad Clock Fanout

General Description

The ISL74420M is a radiation tolerant quad output clock fanout IC with an optional internal oscillator.

It provides synchronization clocks for any application and is particularly useful in multiphase power converters.

Key Features

  • Qualified to Renesas Rad Tolerant Screening and QCI Flow (R34TB0004EU).
  • PVIN supply range 3V to 18V.
  • Independent clock output supply 3V to 5.5V.
  • Programmable output frequency starting at 25kHz.
  • Internal or external clock source.
  • Programmable phase delay as low as 15° increments.
  • I2C/SMBus Compatible.
  • I2C/SMBus or pin strapping to set frequency and phase.
  • TID Radiation Lot Acceptance Testing (LDR: ≤10mrad(Si)/s).
  • ISL74420M30NZ: 30krad.

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ISL74420M Radiation Tolerant Quad Clock Fanout IC Datasheet Description The ISL74420M is a radiation tolerant quad output clock fanout IC with an optional internal oscillator. It provides synchronization clocks for any application and is particularly useful in multiphase power converters. Each of the four outputs can be set to a different frequency division and phase delay. Multiple ISL74420M can be connected together to create more than four synchronized clocks. The division and delay options can be set through selection pins or over an I2C/SMBus interface. The internal oscillator operates at 48MHz and is tunable ±10% with an external resistor. The ISL74420M is offered in a 48 Lead TQFP-EP that is fully specified across the temperature range of -55°C to +125°C.