MIC834 Micrel MIC834 Comparator with Reference Final Information General Description Features The MIC834 is a micropower, precision voltage comparator Optimized for PDAs, cellular telephones, pagers, with an on-chip voltage reference. and other battery-powered devices Input and output can be pulled up to 6V The threshold is adjusted by the choice of two external regardless of supply voltage resistors. Voltage detection threshold is accurate to 1.5%. High 1.5% voltage threshold accuracy Supply current is extremely low (1.5 A, typical), making it Built in hysteresis for noise suppression ideal for portable applications. Extremely low 1.5 A typical supply current The MIC834 is supplied in Micrels IttyBitty 5-lead SOT-23- Immune to brief input transients 5 package. 5-lead SOT-23 package Applications PDAs Pagers Cordless phones Consumer electronics Embedded controllers Personal electronics Ordering Information Part Number Marking Accuracy Temperature Range Package MIC834BM5 B12 1.5% 40C to +85C SOT-23-5 Typical Application V V V IN DD PULL-UP MIC834 R PU V VDD OUT OUT 5 4 R1 V = 1.24V REF INP GND V = 6V INP(max) 1 2 V = 6V PULL-UP(max) R2 1.5V V 5.5V DD IttyBitty is a trademark of Micrel, Inc. Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 MIC834 Micrel Pin Configuration NC GND INP 3 2 1 45 OUT VDD SOT-23-5 (M5) Pin Description Pin Number Pin Name Pin Function 1 INP Input: Analog input to the comparator. When V >V +V , V is INP REF HYST OUT asserted to a logic-high level output. 2 GND Ground 3 NC No Connect 4 OUT Output: Active-high, open-drain output. This output is de-asserted when V <V , indicating a low voltage input. The output is asserted when INP REF V >V +V INP REF HYST. 5 VDD Power Supply (Input): Independent supply input for internal circuitry. MIC834 2 September 2001