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Product Detailed Parameters
- Description：RAIL-TO-RAIL, OPEN-DRAIN COMPARA
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：1
- Output Type：Open-Drain, Rail-to-Rail
- Voltage - Supply, Single/Dual (±)：1.7V ~ 5V
- Voltage - Input Offset (Max)：6mV @ 5V
- Current - Input Bias (Max)：50pA @ 5V
- Current - Output (Typ)：140mA @ 5V
- Current - Quiescent (Max)：125µA
- CMRR, PSRR (Typ)：70dB CMRR, 80dB PSRR
- Propagation Delay (Max)：135ns
- Hysteresis：1mV
- Operating Temperature：-40°C ~ 125°C
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-323-5
- Grade：-
- Qualification：-
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Overview
The TS3121ICT is a single rail-to-rail open-drain comparator from STMicroelectronics, featuring embedded fail-safe input/output. It operates within a supply voltage range of 1.7 V to 5.5 V and supports an extended temperature range from -40 °C to +125 °C. The device offers a typical propagation delay of 60 ns and low power consumption of 70 μA. It includes guaranteed start-up time and high ESD tolerance of 4 kV HBM.
Feature Summary
- Rail-to-rail input capability with open-drain output stage
- Embedded fail-safe architecture for input and output pins
- Guaranteed start-up time ensuring stable output conditions
- High ESD tolerance suitable for industrial environments
Applications
- Industrial control systems
- Automotive electronics
- Power tools
- Overcurrent protection circuits
- Controllers and sensors
Procurement Notes
Verify the specific ordering suffix ICT corresponds to the SC70-5 package and cut tape delivery format. Confirm that the AEC-Q100 qualification aligns with your automotive or industrial requirements. Ensure compatibility with the embedded fail-safe feature rather than the Power-on Reset variant found in other models.
Selection Notes
Select this component when space-constrained designs require a single-channel comparator with rail-to-rail inputs. The fail-safe feature allows operation even if VCC is zero, making it suitable for energy-saving modes. Consider the 60 ns propagation delay for speed requirements and the 70 μA current for low-power applications.
Part Context
This part belongs to the TS3121 family of high-speed, low-power comparators designed for industrial and automotive use. It shares core electrical characteristics with TS3121IYCT but differs in packaging (SC70-5 vs SOT23-5) and delivery format. The ICT suffix denotes the specific reel configuration for this model.
Replacement Considerations
TS3121IYCT: Alternative package (SOT23-5) with identical electrical performance and fail-safe features.
FAQ
Does the TS3121ICT include a Power-on Reset circuit?
No, the TS3121ICT features embedded fail-safe input/output. The Power-on Reset function is specific to the TS3121P version.
What is the maximum input offset voltage for this device?
The datasheet specifies a maximum input offset voltage of 15 mV at 25 °C for the standard TS3121 grade.
