DATASHEET
ISL705xRH, ISL705xEH, ISL706xRH, ISL706xEH, ISL735xEH, ISL736xEH
Radiation Hardened, 5.0V/3.3V µ-Processor Supervisory Circuits
FN7662
Rev.6.01
Mar 2, 2022
The devices in this family (ISL705AEH, ISL705BEH,
Features
ISL705CEH, ISL705ARH, ISL705BRH, ISL705CRH,
• Electrically screened to SMD 5962-11213
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.
• 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)
• 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.
• SEE hardness (see SEE report for details)
2/
- SEL/SEB LET . . . . . . . . . . . . . . . . . . . . . 86MeV•cm mg
TH
• A precision threshold detector for monitoring a power supply
other than V
.
DD
• Precision supply voltage monitor
• An active-low, manual-reset input.
- 4.65V threshold in the ISL7x5AxH/BxH/CxH
- 3.08V threshold in the ISL7x6AxH/BxH/CxH
Applications
• Supervisor for µ-processors, µ-controllers, FPGAs, and DSPs
• 200ms (typical) reset pulse width
- Active high, active low, and open-drain options
• Critical power supply monitoring
• Independent watchdog timer with 1.6s (typical) timeout
• Reliable replacement of discrete solutions
• 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 V = 1.2V
DD
1.4
1.2
5V POWER SUPPLY
ISL7x5xxH
ISL7x6xxH
1.0
0.8
0.6
0.4
0.2
0
VCC
1
2
3
4
MR
VDD
GND
PFI
WDO
RST
WDI
PFO
8
7
6
5
NMI
RST
I/O
µP
165k
49.9k
ISL7X5AxH
-80 -60 -40 -20
0
20
40 60 80 100 120 140
TEMPERATURE (°C)
5V SUPERVISOR APPLICATION WITH OVERVOLTAGE PROTECTION
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. PRECISION THRESHOLD DETECTOR TEMPERATURE
CHARACTERISTICS CURVE
FN7662 Rev.6.01
Mar 2, 2022
Page 1 of 22
© 2011-2022 Renesas Electronics
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