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Product Detailed Parameters
- Description：IC COMPARATOR 2 W/VOLT REF 8SOIC
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：with Voltage Reference
- Number of Elements：2
- Output Type：-
- Voltage - Supply, Single/Dual (±)：2V ~ 36V, ±1V ~ 18V
- Voltage - Input Offset (Max)：5mV @ 5V
- Current - Input Bias (Max)：0.25µA @ 5V
- Current - Output (Typ)：20mA @ 5V
- Current - Quiescent (Max)：2.5mA
- CMRR, PSRR (Typ)：-
- Propagation Delay (Max)：-
- Hysteresis：-
- Operating Temperature：-40°C ~ 105°C
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Mounting Type：Surface Mount
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The TSM109IDT is a dual analog comparator and voltage reference IC manufactured by STMicroelectronics. It integrates two comparators with a fixed 2.5V shunt voltage reference in an 8-pin SOIC package. The device operates on a single supply voltage ranging from 2V to 36V, or dual supplies of ±1V to ±18V. Key electrical parameters include a typical input offset voltage of 1mV, low input bias current of 25nA, and a response time of 1.3µs. The total supply current is approximately 1.1mA, independent of the supply voltage.
Feature Summary
- Integrates two high-speed comparators and a precision shunt voltage reference within a single monolithic IC.
- Features PNP input stages that allow the common-mode voltage range to include ground potential.
- Provides a fixed 2.5V reference output capable of sinking currents between 1mA and 100mA.
- Operates efficiently with low supply current that remains constant regardless of the applied voltage level.
Applications
- Power supply management systems
- Data acquisition circuits
- Over-voltage protection monitoring
Procurement Notes
Verify component authenticity through authorized distributors as counterfeit risks exist for legacy parts. Confirm the specific suffix 'DT' indicates tape and reel packaging suitable for automated surface-mount assembly. Check RoHS compliance status and moisture sensitivity levels prior to storage and soldering processes.
Selection Notes
Select this component when space optimization is required due to its integrated reference and dual comparator design. Ensure the application requires a fixed 2.5V reference rather than adjustable options. Verify that the input signal ranges align with the specified common-mode limits relative to the negative supply rail.
Part Context
This part belongs to the TSM109 family of mixed-signal ICs designed for cost-effective system integration. The 'D' suffix denotes the Small Outline Package (SO-8), while 'T' specifies tape and reel delivery. It serves as a compact alternative to discrete comparator and reference combinations in industrial electronics.
Replacement Considerations
Consult official datasheets for pin-compatible alternatives such as the LM339 series for general comparison tasks. Verify functional equivalence regarding reference voltage accuracy and input stage characteristics before substitution.
FAQ
What is the maximum differential input voltage allowed?
The differential input voltage can equal the positive supply voltage (VCC+).
How does the input bias current direction affect circuit design?
The input current flows out of the IC due to the PNP input stage, which prevents loading charges on input lines.
