Rad-Hard, 5.0V/3.3V µ-Processor Supervisory Circuits
ISL705AEH, ISL705BEH, ISL705CEH, ISL706AEH, ISL706BEH, ISL706CEH
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 Logistics Agency Land and Maritime (DLA). The SMD
numbers listed in the “Ordering Information” table on page 3
must be used when ordering.
Detailed Electrical Specifications for the ISL705AEH,
ISL705BEH, ISL705CEH, ISL706AEH, ISL706BEH and
ISL706CEH are contained in
A “hot-link” is
also provided on our website for downloading.
Features
• Electrically Screened to SMD 5962-11213
• QML Qualified per MIL-PRF-38535 Requirements
• Radiation Hardness
- High Dose Rate. . . . . . . . . . . . . . . . . . . . . . . . . . 100krad(Si)
- Low Dose Rate . . . . . . . . . . . . . . . . . . . 100krad(Si) (Note 1)
- SEL/SEB LET
TH
. . . . . . . . . . . . . . . . . . . . 86MeV * cm
2
/mg
• Precision Supply Voltage Monitor
- 4.65V Threshold in the ISL705AEH/BEH/CEH
- 3.08V Threshold in the ISL706AEH/BEH/CEH
• 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 ISL705AEH/BEH/CEH
- 0.6V Threshold in the ISL706AEH/BEH/CEH
• Debounced TTL/CMOS Compatible Manual-Reset Input
• Reset Output Valid at V
DD
= 1.2V
Applications
• Supervisor for µ-Processors, µ-Controllers, FPGAs and DSPs
• Critical Power Supply Monitoring
• Reliable Replacement of Discrete Solutions
Related Literature
•
“ISL705XRH Evaluation Board User’s Guide”
•
“ISL706xRH Evaluation Board User’s Guide”
•
“Single Event Effects (SEE) Testing of the
ISL705xRH/EH and ISL706xRH/EH Rad Hard Supervisory
Circuits”
5V POWER SUPPLY
1.4
1.2
V
CC
1.0
V
PFI
(V)
0.8
0.6
0.4
0.2
0
0
25
50
ISL705xEH
1 MR
2 V
DD
165k
3 GND
4 PFI
49.9k
WDO 8
RST 7
WDI 6
PFO
5
NMI
RST
I/O
µP
ISL706xEH
ISL705AEH
5V SUPERVISOR APPLICATION WITH OVERVOLTAGE PROTECTION
75
krad (Si)
100
125
150
FIGURE 1. TYPICAL APPLICATION
FIGURE 2. PRECISION THRESHOLD DETECTOR LOW DOSE
IONIZING CHARACTERISTIC CURVE
NOTE:
1. Product capability established by initial characterization. The EH version is acceptance tested on a wafer by wafer basis to 50krad(Si) at low dose rate.
March 30, 2012
FN8262.0
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|
Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.
INTERSIL [ INTERSIL CORPORATION ]
