LM393EDR2G - Dual Open-Collector Comparator | onsemi
MPN: LM393EDR2G ✓ ActiveLM393EDR2G Overview
A comparator is an analog interface integrated circuit that evaluates two input voltages and produces a logic-level indication of their relationship. The LM393 series belongs to the comparator hierarchy within analog and mixed-signal semiconductors. Its two independent channels can compare separate sensor, reference, or feedback signals, making it useful wherever a control system requires a decision based on analog voltage levels rather than numerical data processing.
The LM393EDR2G provides two independent precision voltage comparators in one package. Its open-collector outputs can sink current and require an external pull-up resistor when operating at positive logic levels. The single-supply configuration allows the common-mode input range to extend toward ground, while split-supply operation supports bipolar signal comparison. The 2.0 mV low-offset specification improves threshold accuracy in applications where the difference between two nearby voltages determines the output state.
The 8-SOIC package supports conventional surface-mount assembly and preserves a straightforward pinout for designs using the standard LM393 family. Because the outputs are open collector rather than totem-pole, designers must account for pull-up placement, sink-current limits, rise-time behavior, and possible interaction between channels. Two open-collector outputs can also be wired together when wired-OR logic is required, provided the resulting current and timing constraints are acceptable.
Typical applications include industrial sensor interfaces, battery and power-system threshold monitoring, window-comparator signal conditioning, overvoltage and undervoltage detection, and control inputs for automotive or consumer equipment. In each case, the two channels provide independent comparisons while operating from a common device supply. The broad supply range also makes the device suitable for systems whose input rails vary significantly.
The primary design consideration is output pull-up configuration. Place the pull-up resistor close to the open-collector output to limit trace capacitance and improve switching speed. Also verify the input common-mode range and differential input limits at the actual minimum and maximum supply voltages, and confirm that the pull-up current remains within the output sink-current rating.
This product page combines the manufacturer's functional description, package and cross-reference information, practical design guidance, and application-specific selection criteria. It is intended to help engineers determine whether the LM393EDR2G fits an existing dual-comparator footprint and how to evaluate its electrical and environmental constraints before layout release.
Drop-in alternatives for LM393EDR2G — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM393EDR2G (same form factor and footprint) — differing in Common-Mode Input Range, Number of Channels, Output Type, Package.
LM393DR2G
✅ Drop-InContact for price
View Datasheet →LM393APS
✅ Drop-In📋 Reference alternative (not in catalog)
LM393DR
✅ Drop-In✗ Out of Stock
$0.11 / Unit
View Datasheet →LM393EDR2G Maximum Ratings & Electrical Characteristics
| Comparator Type | Dual independent precision voltage comparator |
| Number of Channels | 2 channels |
| Output Type | Open collector |
| Supply Voltage Range, Single | 2 V to 36 V |
| Supply Voltage Range, Split | ±18 V |
| Maximum Supply Voltage | 36 V |
| Input Offset Voltage | 2.0 mV |
| Common-Mode Input Range | Ground-level common-mode range in single-supply operation |
| Package | 8-SOIC |
| Package Width | 3.90 mm |
| Package Lead Pitch | 0.154 mm |
| Mounting Type | Surface mount |
| Shipping Container Type | Tape and reel |
| Moisture Sensitivity Level | MSL 260 |
| Human Body Model ESD Rating | 1500 V |
| Machine Model ESD Rating | 150 V |
| Quiescent Current | 250 nA |
LM393EDR2G 0.154 mm Pin Configuration Guide
Pin configuration for LM393EDR2G (0.154 mm package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LM393EDR2G.
Refer to the datasheet for full pin configuration.
Typical Applications
LM393EDR2G is suitable for 6 applications: Industrial Sensor Threshold Detection, Battery Power-Supply Monitoring, Overvoltage and Undervoltage Protection, Automotive Signal Conditioning, Window Comparator Control Input, Consumer Equipment Fault Logic.
Industrial Sensor Threshold Detection
The LM393EDR2G is suitable for comparing a scaled sensor signal against a reference in industrial monitoring systems. Its two independent channels can handle separate measurements, while the 2 V to 36 V single-supply range accommodates systems operating from low-voltage sensor rails through substantially higher industrial voltages. The documented ground-level common-mode range in single-supply operation is useful when the sensed signal approaches zero. The open-collector outputs can drive a pull-up and indicate whether each input is above or below its threshold. Before finalizing the design, verify the sensor's signal range, common-mode limits, output transition behavior, and the onsemi datasheet limits for offset voltage, input currents, and supply voltage.
Recommended
Battery Power-Supply Monitoring
The LM393EDR2G can implement independent overvoltage and undervoltage thresholds in battery-powered equipment. One comparator monitors a divided cell or pack voltage against an upper reference, while the second checks the same or another rail against a lower reference. Its 2 V to 36 V operating range covers many low-voltage battery systems and industrial packs, and the two channels need only one package. Because each output is open collector, a pull-up supplies the high state and the system can combine fault indications through wired-OR logic where appropriate. Size the divider for the battery's maximum voltage, account for comparator input bias current, and confirm the input common-mode range throughout charging, load transients, and end-of-discharge conditions.
Recommended
Overvoltage and Undervoltage Protection
A pair of LM393EDR2G channels provides a straightforward window-comparator arrangement for detecting whether a supply rail is outside its permitted range. The upper channel can flag excessive voltage, while the lower channel identifies an insufficient voltage condition, producing separate fault indications through open-collector outputs. The onsemi LM393 family's 36 V maximum supply rating supports protection functions across many 12 V, 24 V, and 36 V industrial systems, although each input must remain within its rated limits. Choose resistor ratios to keep both comparator inputs inside the usable common-mode range. Confirm the output pull-up voltage, sink current, response time, and the tolerances of the reference divider before using the comparator output for load disconnect or system shutdown.
Recommended
Automotive Signal Conditioning
The LM393EDR2G can condition simple vehicle electrical signals by comparing a divided battery or sensor voltage with a threshold. Its 36 V supply capability and two independent channels make it appropriate for basic automotive control and monitoring functions where the comparator is not exposed beyond its absolute maximum ratings. The higher documented HBM and MM ESD ratings of the E variant are relevant during handling and service, but they do not by themselves establish full automotive qualification. Confirm operating temperature, transient immunity, input protection, and production qualification requirements with the current onsemi manufacturer documentation. Use a suitable pull-up for the open-collector outputs and ensure any external divider or clamp network does not compromise threshold accuracy.
Recommended
Window Comparator Control Input
The two channels in the LM393EDR2G can establish lower and upper limits around an analog control quantity, creating a window comparator suitable for system enable, fan control, or interlock logic. The LM393 family supports single- and split-supply operation, allowing the same device architecture to compare bipolar or unipolar signals when the supply arrangement and input levels are appropriate. Input offset voltage specifications as low as 2.0 mV support precise threshold decisions when the surrounding resistor network is also accurate. The open-collector outputs require pull-up resistors and introduce an RC-dependent rising edge, so evaluate the required response time and ensure the output state cannot float. Confirm input bias effects, propagation behavior, and supply-current consumption in the onsemi datasheet.
Recommended
Consumer Equipment Fault Logic
In consumer equipment, the LM393EDR2G can supervise slow-moving analog conditions such as supply presence, temperature-derived voltage, or a keypad or sensor threshold. Two independent comparators reduce the component count when two fault decisions must be made, and the open-collector outputs can directly pull up control lines or combine through wired-OR logic. The 2 V minimum single-supply operation supports low-voltage systems, while the 36 V maximum rating covers higher rails. Choose the pull-up network to balance power consumption against switching speed, and account for the open collector's finite saturation behavior. Confirm whether consumer temperature, ESD, and lifecycle expectations are met by the exact onsemi ordering code before incorporating it into a high-volume product.
Recommended
Recommended Products Summary
Engineering reference data for LM393EDR2G — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM393DR2G | LM393APS | LM393DR |
|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Texas Instruments |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Comparator Channels | 2 independent channels | 2 independent channels | 2 channels | 2 channels |
| Output Type | Open collector | Open collector | Open collector | Open collector |
Key Differentiators
- Higher documented ESD ruggedness within the same onsemi footprint (vs LM393DR2G)
- Two independent low-offset channels in one 8-SOIC package (vs LM393APS)
- Cross-brand sourcing option from the established LM393 family (vs LM393DR)
Design Notes
Place each open-collector output pull-up resistor close to the corresponding LM393EDR2G output pin. The pull-up must connect to a valid logic supply, and its value must satisfy the output sink-current limit while providing the required rise time for the connected capacitance. Keep the input-divider network close to the comparator inputs and route it away from switching nodes to reduce threshold errors and unwanted coupling.
The open-collector output cannot source current, so do not connect a load directly to OUT without a pull-up. When two outputs are tied together for wired-OR operation, confirm that the combined sink current remains below the datasheet limit and that the pull-up resistor still supports the required logic voltage. Unused comparator channels should be configured according to the onsemi manufacturer recommendations rather than left with floating inputs.
A 36 V maximum supply rating does not permit 36 V at every input under every configuration. Check the differential input limit, common-mode range, input current, and absolute-maximum ratings from the onsemi LM393 datasheet for the selected single- or split-supply arrangement. Add input clamping or attenuation where an external signal can exceed those limits, especially during power-off or automotive transients.
Route comparator inputs away from high-current switching paths and connect a stable ground reference to the device and divider network. The LM393 family is intended for relatively slow general-purpose comparisons, so excessive propagation delay or output oscillation caused by layout, input transients, or unsuitable capacitance can impair threshold decisions. Validate the complete channel with its real source impedance, pull-up value, and load rather than relying on isolated timing specifications.
Compliance Information
The onsemi product information does not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status for LM393EDR2G.