The new TLC7705 consumes less than 1% of the power consumption of the industry standard TL7705. Manufactured using our LinBiCMOS process, the TLC7705 reduces power consumption while adding and improving functionality.
The TLC7705 outperforms its predecessors: Its preset 4.55 V sense-voltage threshold is guaranteed to ± 1.5% max tolerance over the full -40° C to 85° C temperature range. Each device requires only 20 µA maximum supply current, making these truly micro-power supervisors. Larger values of timing capacitors CT (up to 100 µF) can be used for longer programmed time delays.
The new CMOS design eliminates the need for external pull-up and pull-down resistors on the outputs. Both the active-high RESET and active-low RESET lines are internally terminated using a push-pull output stage. To eliminate undefined states during power-up and power-down, the RESET output is guaranteed asserted with VDD > = 1 V; both outputs are defined once VDD exceeds 2 V.
The TLC7705 also features additional logic for controlling static memory chips. The CONTROL pin, when driven by the memory select pin of a microprocessor, programs the RESET output to drive the chip select (CS) of the memory circuit (see application). For compatibility with existing TL7705A/B designs, CONTROL can be grounded for active-high RESET operation. The TLC7705 is available in 8-pin or SOIC plastic dip packages.
Vol 11, Spring, 1995