AS1970-T

Overview

The AS1970-T is a low-voltage single comparator from the AS1970 series, manufactured by ams-OSRAM USA INC. It operates on a single supply of 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device features a push/pull output capable of sourcing and sinking up to 8mA. Key electrical characteristics include a typical quiescent supply current of 11µA at 5V, a propagation delay of 300ns with 100mV overdrive, and an input offset voltage of ±0.5mV. It includes internal hysteresis of 3mV and supports a common-mode input range extending 250mV beyond the rails.

Feature Summary

• Push/pull output stage capable of sourcing and sinking up to 8mA for rail-to-rail operation
• Internal hysteresis of 3mV ensures clean switching without external components
• Common-mode input voltage range extends 250mV beyond both supply rails
• Low quiescent supply current consumption suitable for battery-powered applications

Applications

• Battery-powered systems and mobile communication devices
• Zero-crossing detectors and window comparators
• Logic-level translators between 3V and 5V domains
• Threshold detectors and discriminators in power-monitoring systems

Procurement Notes

Verify the specific ordering suffix '-T' confirms tape and reel packaging rather than tube delivery. Confirm the manufacturer designation as ams-OSRAM USA INC. matches the original austriamicrosystems AG technical content. Ensure the component meets the required operating temperature range of -40°C to +85°C for the intended application environment.

Selection Notes

Select the AS1970-T when a single comparator with push/pull output is required for space-limited designs. Choose this part over open-drain variants if direct drive capability without external pull-up resistors is needed. Consider the low supply current and wide common-mode input range for efficient operation in low-voltage portable electronics.

Part Context

The AS1970-T belongs to the AS1970-AS1975 family of low-voltage comparators originally developed by austriamicrosystems AG, now ams AG. This family offers single, dual, and quad configurations in various packages. The AS1970-T specifically denotes the single-channel version with push/pull output in a 5-pin SOT23 package supplied in tape and reel format.

Replacement Considerations

Direct functional substitutes within the same family include the AS1971-T (open-drain output) or multi-channel variants like AS1972/AS1973 if pin compatibility allows. Verify that any replacement maintains the 2.5V to 5.5V supply range and similar propagation delay specifications.