Texas Instruments TLC3704QDRG4Q1

Overview

TLC3704QDRG4Q1 from Texas Instruments is a quad micropower voltage comparator with push-pull CMOS outputs, designed for single-supply automotive applications (−40°C to 125°C). It delivers 2.7 µs typical propagation delay at 5-mV overdrive, 200 µW typical supply power at 5 V, and ±8 mA output drive capability - enabling precise threshold detection in battery-sensitive systems like engine control units and ADAS power supervisors.

For engineers reviewing the TLC3704QDRG4Q1 datasheet, TLC3704QDRG4Q1 pinout, TLC3704QDRG4Q1 application, or TLC3704QDRG4Q1 equivalent, key selection considerations include its rail-to-rail input common-mode range (0 to VDD − 1.5 V), 5 mV max input offset voltage at 25°C, ESD robustness (>2000 V HBM), and compatibility with TTL logic levels without external pullups.

Technical Context

The TLC3704QDRG4Q1 implements four independent comparators using Texas Instruments' LinCMOS process, combining high input impedance (>10¹² Ω), ultra-low input bias current (5 pA typ at 25°C), and stable input offset voltage (≤5 mV at 25°C, ≤7 mV across full temperature range). Its differential input stage supports up to ±18 V differential voltage while maintaining operation within −0.3 V to VDD input voltage limits.

Each comparator features a push-pull CMOS output stage capable of sourcing/sinking ±20 mA per output, eliminating need for external pullup resistors and enabling direct capacitive load driving (CL = 50 pF) with fast transition times (tr = 125 ns, tf = 50 ns). The architecture ensures TTL-compatible VOH ≥ 4.5 V and VOL ≤ 300 mV at 5 V supply and 4 mA load.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), body size 8.65 mm × 3.91 mm, 1.27 mm pitch, RoHS-compliant, rated for −40°C to 125°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339QDRQ1, TLC3704QDRG4Q1 reduces system power by 95% and eliminates pullup resistors; compared with TLC3702QDRQ1, it doubles channel count in same SOIC-14 footprint - making it optimal for space-constrained quad-threshold applications in automotive ECUs and ADAS.

Availability

TLC3704QDRG4Q1 is available at Aetrix Electronics and suitable for automotive engine control, ADAS power supervision, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLC3704QDRG4Q1 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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and consumer markets.

The TLC3704Q series belongs to TI's LinCMOS comparator family, engineered specifically for automotive-grade micropower sensing and supervision - emphasizing low offset drift, rail-to-rail input operation, and robust ESD tolerance in harsh environments.

FAQ

What is the maximum operating temperature range for the TLC3704QDRG4Q1?

The TLC3704QDRG4Q1 is qualified for operation from −40°C to 125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements for automotive under-hood and cabin applications. This rating is validated across all electrical parameters including input offset voltage (≤7 mV), supply current (≤175 µA), and propagation delay stability.

Does the TLC3704QDRG4Q1 require external pullup resistors on its outputs?

No, the TLC3704QDRG4Q1 features push-pull CMOS outputs that actively drive both high and low states, eliminating the need for external pullup resistors. This design reduces component count, board space, and power dissipation - unlike open-collector comparators such as the LM339QDRQ1 which mandate pullups for logic-high output.

Can the TLC3704QDRG4Q1 operate from a 3.3-V supply?

Yes, the TLC3704QDRG4Q1 supports supply voltages from 3 V to 16 V, including 3.3 V. At 3.3 V, it maintains full functionality: input common-mode range of 0 to 1.8 V, output high voltage ≥2.8 V (at I_OH = −4 mA), and propagation delay increases modestly to ~3.5 µs (typ) at 5-mV overdrive - verified in TI's SGLS191A datasheet Figure 20.

What is the input bias current specification for the TLC3704QDRG4Q1 at 125°C?

At 125°C, the TLC3704QDRG4Q1 exhibits a maximum input bias current of 30 nA, as specified in the Electrical Characteristics table (I_IB, VIC = 2.5 V). This ultra-low value - enabled by TI's LinCMOS process - ensures minimal loading on high-impedance sensor sources such as thermistors and photodiodes across the full automotive temperature range.

How does the ESD protection architecture of the TLC3704QDRG4Q1 differ from standard CMOS comparators?

The TLC3704QDRG4Q1 integrates TI's patented LinCMOS ESD-protection circuit featuring dual-path clamping (Q1/Q2 for positive transients, D1/D2 for negative), rated >2000 V HBM. Unlike conventional diode-clamp schemes, this architecture minimizes post-ESD leakage (<10 nA), preserving picoamp-level input bias current integrity critical for precision sensing applications.