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Name: LM219DT
Brand: STMicroelectronics
SKU: LM219DT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

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STMicroelectronics LM219DT

Part No.:: LM219DT

Manufacturer:: STMicroelectronics

Package:: 14-SOIC (0.154, 3.90mm Width)

Datasheet:: LM219DT.pdf

Description:: IC COMPARATOR HS DUAL 14-SOIC

In Stock:: 9535

Quantity:: Add To Cart

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LM219DT Typical application Circuitry

LM219DT

The LM219DT is a high-speed dual voltage comparator, part of the LM219 series known for precise voltage comparison capabilities. It is commonly packaged in a dual in-line package and offers distinct advantages in terms of speed and power consumption, which are essential in applications ranging from zero-crossing detectors to oscillator circuits.

1. Dual Power Supply Pins:

- Pin 8 (VCC+): This is where the positive power supply is connected. The LM219DT can be powered with a range from +3V to +36V in a single supply configuration or from ±1.5V to ±18V in a dual supply mode.

- Pin 4 (GND/VCC-): In a single supply operation, this pin would be connected to the ground. For dual supply operations, it would be tied to the negative supply voltage.

2. Input Pins for Dual Comparators:

- Pins 2 and 3 (Inverting Input and Non-Inverting Input for Comparator 1): The LM219DT will compare the voltage applied at Pin 3 against the voltage at Pin 2.

- Pins 5 and 6 (Inverting Input and Non-Inverting Input for Comparator 2): Similar to Comparator 1, Comparator 2 on the LM219DT will compare the voltage present at Pin 6 against the voltage at Pin 5.

3. Output Pins for Dual Comparators:

- Pin 1 (Output 1): The LM219DT has an open-collector output for Comparator 1, necessitating an external pull-up resistor to establish the logic level when the output is inactive.

- Pin 7 (Output 2): This is the output for Comparator 2, which is also an open-collector type and requires an external pull-up resistor.

4. Feedback for Stability: Implementing hysteresis for both comparators in the LM219DT may be achieved by connecting feedback resistors from Output 1 to Non-Inverting Input of Comparator 1 and similarly from Output 2 to Non-Inverting Input of Comparator 2. This feedback introduces a threshold difference that enhances noise immunity.

5. Input Bias Configuration: The LM219DT's inputs might require external resistors to establish correct biasing, determined by referencing the bias current specifications in the device datasheet.

6. Additional Pins:

- Pins 9 and 10 (Strobe/Input Balance): These pins are used for advanced features such as synchronization or to balance the input offset voltage, but they can be left unconnected if these features are not needed for the LM219DT application.

- Pin 11 (Balance/Offset Null 2): This is used to adjust the balance for Comparator 2 of the LM219DT.

- Pin 12 (Balance/Offset Null 1): Analogous to Pin 11, but used for Comparator 1.

7. Decoupling for Supply Pins: To minimize voltage spikes and noise on the supply line, a bypass capacitor is usually placed close to the supply pins of the LM219DT, enhancing the stability of the comparator's operation.

In circuit implementation, precise wiring of the LM219DT following these guidelines is critical to ensure the comparator functions correctly. The datasheet for the LM219DT provides further details and should be consulted for optimal component selection, especially regarding the characteristics of the external pull-up resistors and capacitors to be used with the open-collector outputs and power supply lines, respectively.

LM219DT information

LM219DT Specifications

Package/Case:
14-SOIC (0.154, 3.90mm Width)
Packaging:
Tape & Reel (TR),Cut Tape (CT),Digi-Reel®
Series:
-
ProductStatus:
Active
Type:
General Purpose
NumberofElements:
2
OutputType:
Open-Collector, Open-Emitter, TTL
Voltage-SupplySingle/Dual(±):
5V ~ 30V, ±2.5V ~ 15V
Voltage-InputOffset(Max):
4mV @ ±15V
Current-InputBias(Max):
0.5µA @ ±15V
Current-Output(Typ):
-
Current-Quiescent(Max):
11.5mA
CMRRPSRR(Typ):
-
PropagationDelay(Max):
-
Hysteresis:
-
OperatingTemperature:
-40°C ~ 105°C
MountingType:
Surface Mount

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6. What is the process for return or replacement of LM219DT?

All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the LM219DT we delivered, we will accept the replacement or return of the LM219DT only when all of the below conditions are fulfilled:

(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.

(2)We are informed of the defect described above within 90 days after the delivery of LM219DT.

(3)The PartNo is unused and only in the original unpacked packaging.

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(1)Inform us within 90 days

(2)Obtain Requesting Return Authorizations