瑞萨电子 (Renesas Electronics Corporation)
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ISL74420M

有效

Radiation Tolerant Quad Adjustable Clock Fanout for Power Management ICs

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特性

  • 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(Si)
    • ISL74420M50NZ: 50krad(Si)
  • SEE characterization
    • No DSEE for PVIN = 20.7V, VCC = 5.5V, and VCCEXT = 6.5V at 46MeV·cm²/mg
    • SEFI <10μm² at 46MeV·cm²/mg
    • No missing pulse SETs and frequency deviation SETs <3.6% on CLKOUTx at 46MeV·cm²/mg
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描述

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. 

  • Connect multiple ISL74420M devices to create more than four synchronized clocks
  • Set division and delay options through selection pins or over an I2C/SMBus interface
  • Configure each of the four outputs to a specific frequency division and phase delay
  • Tune the 48MHz internal oscillator by ±10% with an external resistor

The ISL74420M is available in a 48-lead TQFP-EP package, with specifications covering a temperature range of −55 °C to +125 °C.

产品参数

属性 值
Rating Space
Cascadable? Yes
Interface I2C
Minimum Clock Frequency 25kHz
Maximum Clock Frequency 48MHz
Outputs (#) 4
Output Clock Supply Voltage (min) (V) 3
Output Clock Supply Voltage (max) (V) 5.5
Supply current (mA) 33
Supply Voltage (min) (V) -
Supply Voltage (max) (V) -
Temp. Range (°C) -55 to +125°C
TID LDR (krad(Si)) 30, 50
DSEE (MeV·cm2/mg) 46
Flow RT Plastic
Qualification Level Radiation Tolerant Plastic
Die Sale Availability? No
PROTO Availability? No

封装选项

Pkg. Type Pkg. Dimensions (mm) Lead Count (#) Pitch (mm)
TQFP-EP 7.0 x 7.0 x 1.00 48 0.5

应用

  • Multiphase power converters
  • Synchronizing multiple converters on one board to control EMI and crosstalk

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