TSC TS803R Microprocessor Reset Circuit handbook
Contents
1. 1580381 TS803R Microprocessor Reset Circuit Pin assignment TS803R 1 RESET Open Drain 2 Gnd Threshold Voltage Option 3 Vcc 2 7 2 93 4 2V General Description The TS803R are microprocessor uP supervisory circuit used to monitor the power supplies in uP and digital systems They provide excellent circuit reliability and low cost by eliminating external components and adjustments when used with 5V 3 3V 3 0V powered circuits These circuits perform a single function they assert a reset signal whenever the VCC supply voltage declines below a preset threshold keeping it asserted for at least 140ms after VCC has risen above the reset threshold Reset thresholds suitable for operation with a variety of supply voltages are available The TS803R are open drain outputs The TS803R have an active low RESET output while the TS803R has an active high RESET output The reset comparator is designed to ignore fast transients on VCC and the output guaranteed to be in the correct logic state for VCC down to 1V Low supply correct makes the TS803R ideal for use in portable equipment The TS803R is available in a 3 pin SOT 23 package Features Ordering Information Precision monitoring of 3V 3 3V and 5V enable Threshold Package Fully specified over temperature av 2 Available in three output configurations SOT 23 Open Drain RESET low output TS803RCX F 3uA supply current Note x is the threshold voltage t2. C TS803R 3 3 2003 12 rev E Electrical Characteristics Curve Ter Reset V vs Temperature lao vs Temperature TH supply Current amp 5V uA Reset Vth V Temperature C T Delay vs Temperature loo uA TD2 Delay 45 Temperature C Reset VOL vs Temperature 0 255 Hysteresis of V Reset VOL 0 8mA Temperature C Temperature C TS803R 4 4 2003 12 rev E 23 Mechanical Drawing SOT 23 DIMENSION MILLIMETER INCHE DIM 5 CHES MIN MAX MIN MAX Lr 1 10 0 043 ME G 007 009 0003 0004 TS803R 5 5 2003 12 rev E
3. ype option as Guaranteed reset valid to Vcc 1V 4 20 Power supply transient immunity 2 93 No external components 2 70V Applications Pin Descriptions PinNo Description Intelligent instruments Critical uP and uC power monitoring LACUNE EON Portable Battery powered equipment Absolute Maximum Rating Cu a E B RESET amp RESET push pull 0 3 Vcc 0 3 m gt s m Output curer Reset o m 0 TS803R 1 1 2003 12 Recommended Operating Conditions Power Dissipation 39 ow Lead Soldering Temperature 260 C 10 S Electrical Characteristics Ta 25 C unless otherwise specified Supply Voltage Ta 0 C HOC 1w 55 v Supply Current Vcc Vth 1 1 Vcc Vth 1 1 Ta full range Reset Threshold 0 985 1 015 7 Reset Threshold 0 97 1 03 Full temperature range V Temperature Coefficient to Reset Delay Reset Active Timeout Period Ta 0 C 70 s ms RESET Output Voltage High Vcc gt lsource 500uA 0 8 V Vec gt 1 8V Vcc gt lsource 1500 1 8V gt Vec gt 1V Note 1 The data based 2 7 part type TS803R 2 2 2003 12 rev E TS803R Microprocessor RESET eT TNE Cul TI ll 1 hs LLLI 11 0 1 Glitch Amplitude Temperature
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TSC TS803R Microprocessor Reset Circuit handbook