MAX977ESD+T

Comparators Overview

The MAX977ESD+T is a dual, +3V/+5V dual-speed comparator with auto-standby functionality. It operates on a single supply from +2.7V to +5.25V and features three modes: high speed (28ns propagation delay, 250µA current), low power (480ns delay, 3µA current), and auto-standby. The device includes rail-to-rail outputs, internal hysteresis in high-speed mode, and ground-sensing inputs. It is housed in a 14-pin SO package and supports an operating temperature range of -40°C to +85°C.

Comparators Feature Summary

• Three operating modes including high speed, low power, and auto-standby for optimized power management
• Rail-to-rail output capability without external pull-up circuitry
• Internal hysteresis in high-speed mode ensures clean switching
• Adjustable auto-standby timeout period via external capacitor

Comparators Applications

• Battery-powered systems
• RF ID tags
• Keyless entry systems
• Threshold detectors and discriminators
• IR receivers

Comparators Procurement Notes

Verify the specific suffix 'ESD' corresponds to the 14-pin SO package and industrial temperature range (-40°C to +85°C) as listed in the ordering information. Confirm RoHS compliance status through official manufacturer documentation or certified distributor channels prior to procurement.

Comparators Selection Notes

Select this component for applications requiring dual comparators with independent auto-standby timing control. It is suitable for +3V and +5V single-supply designs where power conservation during idle periods is critical. Ensure input signals remain within the common-mode voltage range of -0.2V to (VCC - 1.2V) for proper operation.

Comparators Part Context

The MAX977 is the dual-channel variant of the MAX975 single-channel comparator family. Both devices share identical electrical characteristics and operating modes but differ in pin count and package options. The MAX977 provides two independent comparators with separate timeout inputs for distinct auto-standby configurations.

Comparators Replacement Considerations

MAX975ESA

Comparators FAQ

How is the auto-standby timeout period determined?

The timeout period is programmed using an external capacitor connected to the STO_ pin. The relationship is tASB = 10 x CSTO µs, where CSTO is in pF.

What is the function of the STAT pin?

The STAT pin indicates the operating mode; it is low in high-speed mode and high in auto-standby or low-power modes. It can also source up to 3mA to power additional circuitry.