Comparator with on-chip voltage reference — saves a resistor divider
The Maxim Integrated MAX9064EBS+TG45 is a single comparator that integrates a voltage reference on-chip, eliminating the need for an external resistor divider or reference IC in threshold-detection circuits. It is designed for space-constrained, battery-powered applications where every microamp and square millimetre counts. The push-pull output drives logic inputs directly without a pull-up resistor, and the ±12mV hysteresis prevents chatter near the switching threshold.
1.1 µA quiescent current — the spec that decides the battery budget
With a maximum quiescent current of 1.1 µA, this comparator is suited for always-on monitoring in portable medical devices, IoT sensor nodes, and battery-management systems where the supply current of the detection circuit directly impacts standby life. The 60 pA typical input bias current at 3.3 V means the threshold resistor string can be high-impedance without adding offset error.
Supply range from 1 V to 5.5 V — one part for multiple rail voltages
The 1 V to 5.5 V single-supply range lets the MAX9064EBS+TG45 operate from a single Li-ion cell, a 1.8 V logic rail, or a standard 3.3 V / 5 V supply. This simplifies BOM consolidation across product variants that use different system voltages. The 53 dB PSRR provides reasonable rejection of supply ripple in noisy environments like motor drives or DC-DC converters.
15 µs propagation delay — fast enough for overvoltage/undervoltage detection
The 15 µs maximum propagation delay is adequate for monitoring power-good signals, battery undervoltage lockout, and over-temperature thresholds. It is not intended for high-speed comparator applications such as zero-crossing detection in switching power supplies, where sub-microsecond delays are required.
4-UCSP package — board-area fit for dense designs
Housed in a 4-bump WFBGA (1.05 mm x 1.05 mm body), the MAX9064EBS+TG45 occupies minimal PCB area. The surface-mount, 4-UCSP package is suited for handheld and wearable products where board real estate is at a premium. The tape-and-reel and cut-tape options accommodate both prototyping and volume production.