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DATASHEET
ISL705xRH, ISL705xEH, ISL706xRH, ISL706xEH, ISL735xEH, ISL736xEH
Radiation Hardened, 5.0V/3.3V µ-Processor Supervisory Circuits
The devices in this family (ISL705AEH, ISL705BEH, ISL705CEH, ISL705ARH, ISL705BRH, ISL705CRH, ISL706AEH, ISL706BEH, ISL706CEH, ISL706ARH, ISL706BRH, ISL706CRH, ISL735AEH, ISL735BEH, ISL735CEH, ISL736AEH, ISL736BEH, ISL736CEH) 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.
• A reset output during power-up, power-down, and brownout conditions.
• An independent watchdog output that goes low if the watchdog input has not been toggled within 1.6s.
• A precision threshold detector for monitoring a power supply other than VDD.
• An active-low, manual-reset input.
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 acceptance testing - ISL705xRH, ISL706xRH
- High dose rate . . . . . . . . . . . . . . . . . . . . . . . . . . 100krad(Si) • Radiation acceptance testing - ISL705xEH, ISL706xEH
- High dose rate . . . . . . . . . . . . . . . . . . . . . . . . . . 100krad(Si) - Low dose rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50krad(Si) • Radiation acceptance testing - ISL735xEH, ISL736xEH - Low dose rate (EH) . . . . . . . . . . . . . . . . . . . . . . . .50krad(Si) • SEE hardness (see SEE report for details) - SEL/SEB LETTH. . . . . . . . . . . . . . . . . . . . . 86MeV•cm2/mg • Precision supply voltage monitor - 4.65V threshold in the ISL7x5AxH/BxH/CxH - 3.08V threshold in the ISL7x6AxH/BxH/CxH
• 200ms (typical) reset pulse width - Active high, active low, and open-drain options
• Independent watchdog timer with 1.6s (typical) timeout • Precision threshold detector
- 1.25V threshold in the ISL7x5AxH/BxH/CxH - 0.6V threshold in the ISL7x6AxH/BxH/CxH
• Debounced TTL/CMOS compatible manual-reset input • Reset output valid at VDD = 1.2V
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
ISL7X5AxH
5V SUPERVISOR APPLICATION WITH OVERVOLTAGE PROTECTION
FIGURE 1. TYPICAL APPLICATION
VPFI (V)
1.4
1.2
1.0
ISL7x5xxH
0.8
0.6
0.4
ISL7x6xxH
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
FN7662 Rev.6.02 Feb 7, 2024
Page 1 of 22 © 2011-2024 Renesas Electronics
ISL705xRH, ISL705xEH, ISL706xRH, ISL706xEH, ISL735xEH, ISL736xEH
Table of Contents
Functional Block Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..