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TM
IS-705RH
Data Sheet December 2001 FN4703.4
Radiation Hardened Power-Up/Down Microprocessor Reset Circuit
The Radiation Hardened IS-705RH is a monolithic device that monitors the power supply voltage used by satellite control units and provides a reset output pulse during power-up and power-down. The reset threshold is 4.65V (Typ) and the reset pulse width is set at 200ms (Typ). A watchdog circuit is incorporated for easy interfacing with microprocessors and controllers. If the watchdog input has not been toggled within a preset 1.6s (Typ) time period, an output signal is generated, which can be used as an interupt. The power function input (PFI) may be used to monitor other voltage levels. The circuit has a 1.25V (Typ) threshold and provides a PFO output when low voltage is detected. An active-low manual reset input in also provided for direct control of the reset function.
TM
Features
* Electrically Screened to SMD # 5962-00538 * QML Qualified per MIL-PRF-38535 Requirements * Radiation Hardness - Total Dose. . . . . . . . . . . . . . . . . . . . . 100 krad(Si) (Max) - Single Event Latch-up . . . . . . . . . . . . >90MeV/mg/cm2 * Precision 4.65V Voltage Monitor * Wide Operating Supply Range . . . . . . . . . . . 1.2V to 5.5V * Low Supply Current . . . . . . . . . . . . . . . . . . . . 420A (Typ) * 200ms (Typ) RESET Pulse Width
Applications
* Flight Computers * Controllers * Critical Microprocessor Power Monitoring * Reliable Replacement of Discrete Solutions
Constructed with the Intersil UHF2X-CMOS process, these devices have been specifically designed to provide highly reliable performance in harsh radiation environments. This process has been tested for single event latch-up and has demonstrated an immunity to 90MeV/mg/cm2. Specifications for Rad Hard QML devices are controlled by the Defense Supply Center in Columbus (DSCC). The SMD numbers listed here must be used when ordering. Detailed Electrical Specifications for these devices are contained in SMD 5962-00538. A "hot-link" is provided on our homepage for downloading.
Ordering Information
ORDERING NUMBER 5962R0053801QXC 5962R0053801VXC 5962R0053801V9A IS9-705RH/Proto INTERNAL MKT. NUMBER IS9-705RH-8 IS9-705RH-Q IS0-705RH-Q IS9-705RH/Proto TEMP. RANGE (oC) -55 to 125 -55 to 125 -55 to 125 -55 to 125
Pinout
IS9-705RH FLATPACK TOP VIEW
MR VCC GND PFI 1 2 3 4 8 WDO 7 RESET 6 WDI 5 PFO
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2001. All Rights Reserved Star*PowerTM is a trademark of Intersil Americas Inc.
IS-705RH Die Characteristics
DIE DIMENSIONS: 1500m x 1830m (59 mils x 72 mils) Thickness: 483m 25.4m (19 mils 1 mil) INTERFACE MATERIALS Glassivation Type: Nitride (Si3N4) over Silox (SiO2) Nitride Thickness: 4.0kA 1.0kA Silox Thickness: 12.0kA 4.0kA Top Metallization Top Metal 3: TiAlCu Thickness: 0.8m 0.02m Metal 1 and 2: TiAlCu Thickness: 0.4m 0.01m Substrate: UHF2X-CMOS Backside Finish: Silicon ASSEMBLY RELATED INFORMATION Substrate Potential: Backside internally connected to GND (May be left floating or connected to GND.) ADDITIONAL INFORMATION Worst Case Current Density: <2.0 x 105 A/cm 2
Metallization Mask Layout
IS-705RH
MR (1)
WDO (8)
VCC (2) RESET (7)
GND (3)
WDI (6)
PFI (4)
PFO (5)
NOTES: 1. Octagonal trim pads should be left unconnected.
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 2

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