Texas Instruments TL393ID

Overview

TL393ID from Texas Instruments is a dual differential comparator IC designed for low-voltage, single-supply operation (2 V to 7 V), featuring rail-to-ground common-mode input range, 0.65 µs typical response time at 5 V, and 0.7 mA typical supply current. It serves as an enhanced drop-in alternative to LM393 in battery-powered sensor interfaces and portable voltage-monitoring circuits.

For engineers reviewing the TL393ID datasheet, TL393ID pinout, TL393ID application, or TL393ID equivalent, key selection criteria include its guaranteed operation down to 2 V supply, input offset voltage ≤9 mV over full temperature range, open-collector output compatibility with TTL/CMOS logic, and SOIC-8 packaging suitable for automated SMT assembly.

Technical Context

The TL393ID implements two independent high-gain comparators using TI's proprietary bipolar process, enabling lower quiescent current than legacy LM393 while maintaining faster switching. Its input stage supports common-mode voltages from ground to VCC – 2 V, allowing direct sensing of signals referenced to system ground.

Each comparator features open-collector outputs capable of sinking up to 6 mA at 25°C, with VOL ≤300 mV at IOL = 1 mA and VCC = 5 V. The device operates across –40°C to 105°C without derating limitations on input voltage or differential input range.

Key Specifications

Pinout & Package

TL393ID is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package (Package Drawing D), 3.9 mm width, 4.9 mm length, 1.75 mm height, with gull-wing leads and RoHS-compliant finish. Pin 1 is marked by a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM393DR and TLV3702IDR, TL393ID delivers optimal balance of speed, low supply current, and ground-sensing capability in a standard SOIC-8 footprint - making it ideal for space-constrained, battery-sensitive industrial monitoring where LM393 performance is insufficient and CMOS comparators introduce layout complexity.

Availability

TL393ID is available at Aetrix Electronics and suitable for battery management systems, motor control safety interlocks, and power supply sequencing circuits requiring stable component supply and long-term industrial availability.

Supply support for TL393ID 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 connectivity technologies, with decades of expertise in precision analog ICs and industrial-grade components.

The TL393ID belongs to TI's legacy precision comparator product line, engineered specifically for robust, low-power voltage comparison in harsh environments - including automotive body electronics, industrial automation, and portable instrumentation.

FAQ

What is the maximum supply voltage rating for TL393ID?

The absolute maximum supply voltage for TL393ID is 7 V, as specified in the Absolute Maximum Ratings table. Operation above this voltage risks permanent damage. For reliable long-term performance, TI recommends staying within the recommended operating range of 2 V to 7 V, with 5 V being the most commonly used supply in validated designs. The TL393ID maintains full functionality across this entire range without derating.

Does TL393ID support rail-to-rail input operation?

No, TL393ID does not support rail-to-rail input operation. Its common-mode input voltage range extends from ground (0 V) up to VCC – 2 V at full temperature range (–40°C to 105°C). This means the upper limit is 3 V when VCC = 5 V, and 1 V when VCC = 3 V. While not rail-to-rail, this ground-inclusive range enables direct interface with many ground-referenced sensors - a key advantage over older comparators like LM393 that require input biasing.

Can TL393ID drive a 5 V logic input directly?

Yes, TL393ID can drive a 5 V logic input, but only when used with an external pull-up resistor to 5 V. Its open-collector outputs do not source current; they sink current to ground when active. To interface with 5 V TTL or CMOS inputs, connect a pull-up resistor (typically 4.7 kΩ to 10 kΩ) between the TL393ID output pin and the 5 V rail. The output will then swing between ~0.3 V (LOW) and 5 V (HIGH), meeting standard logic thresholds.

Is TL393ID pin-compatible with LM393?

Yes, TL393ID is pin-compatible with LM393 in SOIC-8 (D) package. Both devices share identical pin assignments: 1OUT, 1IN–, 1IN+, GND, 2IN+, 2IN–, 2OUT, VCC. This allows direct replacement in existing LM393 layouts without PCB modification. However, TL393ID offers improved specs - 0.65 µs vs. 1.3 µs response time and 0.7 mA vs. 1.2 mA supply current - delivering measurable performance gains in the same footprint.

What is the input offset voltage specification for TL393ID over temperature?

The input offset voltage for TL393ID is guaranteed ≤9 mV across the full operating temperature range of –40°C to +105°C. At 25°C, the typical value is 1.5–5 mV. This tighter max specification compared to LM393 (≤15 mV) improves accuracy in precision threshold detection applications such as battery end-of-discharge monitoring and analog window comparators where consistent trip points are critical across environmental conditions.