Texas Instruments TL3116CD

Overview

TL3116CD from Texas Instruments is an ultra-fast, rail-to-rail input comparator with complementary TTL-compatible outputs, 10 ns typical propagation delay, ±5-V or single 5-V supply operation, and latch-enable functionality-designed for high-speed threshold detection in precision analog-to-digital interfaces and pulse-width modulation feedback loops.

For engineers reviewing the TL3116CD datasheet, TL3116CD pinout, TL3116CD application, or TL3116CD equivalent, key selection considerations include propagation delay vs. overdrive voltage, input common-mode range extending to the negative rail, latch timing setup (3.4 ns), output drive capability (±20 mA), and SOIC-8 thermal derating (5.8 mW/°C above 25°C).

Technical Context

The TL3116CD employs a bipolar differential input stage with tightly matched transistors to achieve 3 mV typical input offset voltage and 75–100 dB common-mode rejection ratio. Its internal latch circuit responds to the LATCH ENABLE terminal with 3.4 ns setup time and holds Q and Q̅ outputs until the next valid comparison event.

It operates across 0°C to 70°C ambient temperature with 12.7 mA typical positive supply current and −2.6 mA typical negative supply current under ±5-V conditions. Propagation delay remains stable across load capacitance (0–50 pF) and supply voltage (±4.6 V to ±5.4 V), enabling robust timing in noisy industrial control environments.

Key Specifications

Pinout & Package

TL3116CD is housed in an 8-pin SOIC (D) package, 3.91 mm wide, 4.90 mm long, 1.75 mm max height, with standard JEDEC MS-012AA outline and gull-wing leads. Pin 1 identifier is marked by a beveled corner or notch on the package top edge.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed comparator applications.

Compared with TL3116CD, LT1116CS8#PBF offers identical pinout and latch capability but consumes ~16% more supply current, while LM311DR lacks integrated latching and is 20× slower-making TL3116CD the sole choice for compact, low-latency, self-latching comparator functions in space-constrained industrial controls.

Availability

TL3116CD is available at Aetrix Electronics and suitable for motor control systems, switch-mode power supplies, high-speed data acquisition triggers, and overvoltage protection monitors requiring stable component supply and long-term industrial-grade availability.

Supply support for TL3116CD 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 high-performance signal conditioning ICs.

The TL3116CD belongs to TI's precision high-speed comparator product line, engineered specifically for real-time industrial control, motor commutation, and power conversion systems demanding nanosecond-level timing fidelity and latch-hold reliability.

FAQ

What is the maximum operating temperature range for the TL3116CD?

The TL3116CD is rated for operation from 0°C to 70°C ambient temperature, as specified in the "Available Options" table and absolute maximum ratings section of the SLCS132C datasheet. This commercial-grade temperature range makes it suitable for indoor industrial equipment, test instrumentation, and consumer-grade power electronics where environmental extremes are controlled. The TL3116ID variant extends this to −40°C to 85°C for extended-temperature applications.

Does the TL3116CD require external pull-up resistors on its outputs?

No, the TL3116CD features push-pull complementary outputs (Q OUT and Q̅ OUT) that actively drive both logic high and logic low states without external pull-up resistors. Each output can source or sink up to ±20 mA, delivering TTL-compatible voltage levels: VOH ≥ 3.6 V at 1 mA and VOL ≤ 600 mV at 4 mA. This eliminates board space and BOM cost associated with discrete pull-ups required by open-collector comparators like the LM311.

Can the TL3116CD operate from a single 3.3-V supply?

No-the TL3116CD is not characterized or guaranteed for operation below 5 V. Its electrical specifications (e.g., propagation delay, output voltage levels, input common-mode range) are validated only at ±5 V or single 5-V supply per the "Electrical Characteristics" table. Attempting 3.3-V operation may result in degraded speed, increased offset, or failure to meet latch timing requirements. For 3.3-V systems, consider TI's TLV3501 or similar rail-to-rail comparators designed for lower supply voltages.

How does the LATCH ENABLE function work in the TL3116CD?

The LATCH ENABLE terminal (Pin 8) controls output state retention: when high (≥2 V), the TL3116CD updates Q OUT and Q̅ OUT in real time based on IN+ vs. IN− comparison; when low (≤0.8 V), outputs freeze at their last valid logic states. A 3.4 ns setup time ensures reliable capture relative to the latch-enable edge. This allows synchronous sampling of fast analog events-such as encoder pulses or fault transients-without missing transitions between system clock cycles.

Is the TL3116CD pin-compatible with the TL3116ID?

Yes-the TL3116CD and TL3116ID share identical SOIC-8 (D) package footprints, pin assignments, and electrical pin functions. The only difference is the operating temperature range: TL3116CD is rated 0°C to 70°C, while TL3116ID is rated −40°C to 85°C. Both parts use the same die and bonding structure, allowing direct PCB-level substitution when extended temperature performance is required, provided thermal design accommodates the higher max junction temperature (150°C).