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Product Detailed Parameters
- Description：IC COMPARATOR 4 GEN PUR 14TSSOP
- Series：-
- Mfr：ams-OSRAM USA INC.
- Package：Tape & Reel (TR)
- Type：General Purpose
- Number of Elements：4
- Output Type：Push-Pull
- Voltage - Supply, Single/Dual (±)：2.5V ~ 5.5V, ±1.25V ~ 2.75V
- Voltage - Input Offset (Max)：6mV @ 5.5V
- Current - Input Bias (Max)：1pA @ 5.5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：64µA
- CMRR, PSRR (Typ)：80dB CMRR, 80dB PSRR
- Propagation Delay (Max)：420ns
- Hysteresis：±3mV
- Operating Temperature：-40°C ~ 85°C
- Package / Case：14-TSSOP (0.173", 4.40mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：14-TSSOP
- Grade：-
- Qualification：-
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Overview
The AS1974-T is a low-voltage quad comparator from the AS1970 series, manufactured by ams OSRAM USA INC. It operates on single supplies from 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device features push/pull outputs capable of sourcing and sinking up to 8mA with rail-to-rail swings. Key electrical characteristics include a typical propagation delay of 300ns at 100mV overdrive, an input offset voltage of ±0.5mV (typ), and internal hysteresis of 3mV. Supply current is minimized at 8.5µA per comparator.
Feature Summary
- Quad configuration with CMOS push/pull output stage
- Rail-to-rail output swing supporting loads up to 8mA
- Internal 3mV hysteresis for clean switching
- Common-mode input range extends 250mV beyond supply rails
Applications
- Battery-powered systems
- Zero-crossing detectors
- Window comparators
- Logic-level translators
- Threshold detectors and discriminators
Procurement Notes
Verify the specific ordering suffix '-T' indicates tape and reel packaging rather than tube delivery. Confirm the manufacturer designation as austriamicrosystems AG (now ams AG) matches the component marking 'AS1974'. Ensure the datasheet revision aligns with current production specifications before finalizing procurement documentation.
Selection Notes
Select this component when a quad comparator solution is required in space-limited applications. The push/pull output architecture eliminates the need for external pull-up resistors compared to open-drain variants. Verify that the 300ns propagation delay meets system timing requirements and that the 2.5V minimum supply voltage aligns with the target power source.
Part Context
The AS1974-T belongs to the AS1970-AS1975 family of low-power comparators designed for 3V and 5V logic applications. While the AS1970/AS1971 are single units in SOT23 packages and the AS1972/AS1973 are dual units in MSOP packages, the AS1974 provides four independent comparators in a compact 14-pin TSSOP package.
Replacement Considerations
Public confirmed substitute part numbers: None identified.
