ISL705ARH Datasheet, PDF (1/15 Pages) Intersil Corporation – Rad-Hard, 5.0V/3.3V μ-Processor Supervisory Circuits

Rad-Hard, 5.0V/3.3V µ-Processor Supervisory Circuits
ISL705ARH, ISL705BRH, ISL705CRH, ISL706ARH, ISL706BRH, ISL706CRH
This family of devices are radiation hardened 5.0V/3.3V
supervisory circuits that reduce the complexity required to
monitor supply voltages in microprocessor systems. These
devices significantly improve accuracy and reliability relative to
discrete solutions. Each IC provides four key functions.
1. A reset output during power-up, power-down, and brownout
conditions.
2. An independent watchdog output that goes low if the
watchdog input has not been toggled within 1.6s.
3. A precision threshold detector for monitoring a power
supply other than V_DD.
4. An active-low manual-reset input.
Specifications for Rad Hard QML devices are controlled by the
Defense Supply Center in Columbus (DSCC). The SMD
numbers listed in the “Ordering Information” table on page 3
must be used when ordering.
Detailed Electrical Specifications for the ISL705ARH,
ISL705BRH, ISL705CRH, ISL706ARH, ISL706BRH and
ISL706CRH are contained in SMD 5962-11213. A “hot-link” is
provided on our website for downloading.
Applications
• Supervisor for µ-Processors, µ-Controllers, FPGAs and DSPs
• Critical Power Supply Monitoring
• Reliable Replacement of Discrete Solutions
Features
• Electrically Screened to SMD 5962-11213
• QML Qualified per MIL-PRF-38535 Requirements
• Radiation Hardness
- High Dose Rate. . . . . . . . . . . . . . . . . . . . . . . . . . 100krad(Si)
- SEL/SEB LET_TH. . . . . . . . . . . . . . . . . . . . . . 86MeV/mg/cm²
• Precision Supply Voltage Monitor
- 4.65V Threshold in the ISL705ARH/BRH/CRH
- 3.08V Threshold in the ISL706ARH/BRH/CRH
• 200ms (Typ) Reset Pulse Width
- Active High, Active Low and Open Drain Options
• Independent Watchdog Timer with 1.6s (Typ) Timeout
• Precision Threshold Detector
- 1.25V Threshold in the ISL705ARH/BRH/CRH
- 0.6V Threshold in the ISL706ARH/BRH/CRH
• Debounced TTL/CMOS Compatible Manual-Reset Input
• Reset Output Valid at V_DD = 1.2V
Related Literature
• ISL705RH Voltage Supervisory Circuit Evaluation Board
User’s Guide
• ISL706RH Voltage Supervisory Circuit Evaluation Board
User’s Guide
5V POWER SUPPLY
VCC
1 MR
WDO 8
NMI
165k
2 VDD
3 GND
RST 7
WDI 6
RST
µP
I/O
4 PFI
PFO 5
49.9k
ISL705ARH
5V SUPERVISOR APPLICATION WITH OVERVOLTAGE PROTECTION
FIGURE 1. TYPICAL APPLICATION
1.4
1.2
1.0
ISL705xRH
0.8
0.6
0.4
ISL706xRH
0.2
0
-80 -60 -40 -20 0 20 40 60 80 100 120 140
TEMPERATURE (°C)
FIGURE 2. PRECISION THRESHOLD DETECTOR TEMPERATURE
CHARACTERISTICS CURVE
September 15, 2011
1
FN7662.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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