Texas Instruments LM3302DRG4

Overview

LM3302DRG4 from Texas Instruments is a quad voltage comparator IC designed for single-supply operation (2 V to 28 V) or dual-supply configurations with ±28 V differential input range. It features 0.8 mA typical supply current, 25 nA typical input bias current, and open-collector outputs compatible with TTL/MOS/CMOS logic-commonly used in level detection, window comparators, and power-supply monitoring circuits.

For engineers reviewing the LM3302DRG4 datasheet, LM3302DRG4 pinout, LM3302DRG4 application, or LM3302DRG4 equivalent, key selection considerations include its rail-to-rail common-mode input range (including ground), low 3 mV typical input offset voltage, 1.3 µs response time at 5 V, and SOIC-14 packaging with RoHS-compliant NIPDAU finish.

Technical Context

The LM3302DRG4 integrates four independent comparators sharing a common supply structure with internal current regulation. Each comparator uses a high-gain, open-collector output stage driven by a 80-µA reference current source, enabling stable performance across 2 V–28 V supply rails without supply-current drift.

Its input stage supports common-mode voltages from ground to VCC − 1.5 V (25°C), and differential inputs tolerate up to ±28 V-enabling direct sensing of signals referenced to ground or floating sources without external level-shifting circuitry.

Key Specifications

Pinout & Package

LM3302DRG4 is housed in a 14-pin SOIC (D package) with standard JEDEC outline, 1.27 mm pitch, and 8.65 mm × 3.91 mm body dimensions. Thermal resistance θ_JA = 86°C/W supports continuous operation at ambient temperatures up to +85°C with minimal derating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad voltage comparator applications.

Compared with LM3302DRG4, LM339DR trades precision for broader legacy compatibility, while TLV3704IDR offers nanoscale power savings at the expense of voltage range-making LM3302DRG4 optimal for robust 2–28 V industrial sensing where offset and speed are critical.

Availability

LM3302DRG4 is available at Aetrix Electronics and suitable for power supply monitoring, motor control feedback, and industrial sensor interface applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for LM3302DRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and digital signal technologies with over 90 years of innovation in industrial, automotive, and communications markets.

The LM3302DRG4 belongs to TI's legacy analog comparator family, engineered for reliability in harsh industrial environments-emphasizing wide supply range, input robustness, and consistent open-collector output behavior across temperature and voltage extremes.

FAQ

What is the maximum supply voltage for LM3302DRG4?

The LM3302DRG4 supports a maximum supply voltage of 28 V, as specified in its absolute maximum ratings. This rating applies to single-supply operation between VCC and GND. In dual-supply configurations, the difference between the positive and negative supplies must not exceed 28 V, and VCC must remain at least 1.5 V more positive than the input common-mode voltage. Exceeding 28 V risks permanent damage to the LM3302DRG4.

Does LM3302DRG4 require external pull-up resistors on its outputs?

Yes, LM3302DRG4 requires external pull-up resistors on all four open-collector outputs (pins 3, 4, 11, and 14). These resistors establish the logic-high voltage level and determine sink current capability. Typical values range from 1 kΩ to 10 kΩ depending on load capacitance and required rise time. Without pull-ups, the LM3302DRG4 outputs cannot assert a valid high state, rendering wired-AND functionality inoperable.

Can LM3302DRG4 operate with inputs below ground?

No, LM3302DRG4 does not support inputs below ground. Its common-mode input voltage range is specified from 0 V to VCC − 1.5 V at 25°C, and down to 0 V to VCC − 2 V across −40°C to +85°C. Inputs below 0 V violate absolute maximum ratings and may cause latch-up or parametric degradation. For bipolar signal handling, external level-shifting circuitry is required before applying signals to the LM3302DRG4.

What is the typical input offset voltage of LM3302DRG4 at room temperature?

The typical input offset voltage of LM3302DRG4 at 25°C is 3 mV, with a maximum of 20 mV under nominal conditions (VCC = 5 V to 28 V, VIC = VICRmin). Over the full operating temperature range (−40°C to +85°C), the maximum offset increases to 40 mV. This parameter directly impacts threshold accuracy in precision level-detection applications using the LM3302DRG4.

Is LM3302DRG4 pin-compatible with LM339DR?

Yes, LM3302DRG4 is pin-compatible with LM339DR in the SOIC-14 (D) package: both share identical pin assignments for VCC (pin 14), GND (pin 7), and all eight inputs and four outputs. However, LM3302DRG4 offers lower input offset voltage (3 mV vs. 7 mV typ) and tighter bias current specs-making it a performance upgrade within the same PCB footprint. No layout changes are needed when substituting LM3302DRG4 for LM339DR.