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DS1232 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1232 Datasheet(HTML) 1 Page - Dallas Semiconductor |
1 / 7 page 1 of 7 111899 FEATURES Halts and restarts an out-of-control microprocessor Holds microprocessor in check during power transients Automatically restarts microprocessor after power failure Monitors pushbutton for external override Accurate 5% or 10% microprocessor power supply monitoring Eliminates the need for discrete components Space-saving, 8-pin mini-DIP Optional 16-pin SOIC surface mount package Industrial temperature -40°C to +85°C available, designated N PIN ASSIGNMENT PIN DESCRIPTION PBRST - Pushbutton Reset Input TD - Time Delay Set TOL - Selects 5% or 10% VCC Detect GND - Ground RST - Reset Output (Active High) RST - Reset Output (Active Low, open drain) ST - Strobe Input VCC - +5 Volt Power NC - No Connections DESCRIPTION The DS1232 MicroMonitor Chip monitors three vital conditions for a microprocessor: power supply, software execution, and external override. First, a precision temperature-compensated reference and comparator circuit monitors the status of VCC. When an out-of-tolerance condition occurs, an internal power fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signals are kept in the active state for a minimum of 250 ms to allow the power supply and processor to stabilize. DS1232 MicroMonitor Chip www.dalsemi.com DS1232S 16-Pin SOIC (300-mil) See Mech. Drawings Section NC PBRST NC TD NC TOL NC GND NC VCC NC ST NC RST NC RST 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 PBRST DS1232 8-Pin DIP (300-mil) See Mech. Drawings Section TD TOL GND VCC ST RST 1 2 3 4 8 7 6 5 RST |
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