Texas Instruments TL3116IDR

Overview

TL3116IDR 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 - used in high-speed analog-to-digital interfaces, pulse-width modulation feedback loops, and overvoltage protection circuits.

For engineers reviewing the TL3116IDR datasheet, TL3116IDR pinout, TL3116IDR application, or TL3116IDR equivalent, key selection criteria include propagation delay under low overdrive, input common-mode range extending to negative rail, latch timing (3.4 ns setup), output drive capability (±20 mA), and industrial temperature support (−40°C to +85°C).

Technical Context

The TL3116IDR employs a bipolar differential input stage with tightly matched transistors to achieve 0.5 mV typical input offset voltage and 75 dB minimum CMRR. Its complementary open-collector outputs (Q and Q̄) support wired-OR logic and direct TTL interfacing without pull-up resistors when V_CC+ = 5 V.

Latch enable operates at standard TTL thresholds (V_IL = 0.8 V, V_IH = 2.0 V), with 3.4 ns setup time relative to input transition; propagation delay remains stable across −40°C to +85°C (9.9–15 ns max) and load capacitance up to 50 pF.

Key Specifications

Pinout & Package

TL3116IDR is housed in an 8-pin SOIC (D) package (5.3 mm × 6.2 mm, 1.75 mm max height), RoHS-compliant with NIPDAU lead finish, MSL Level-1, and tape-and-reel packaging (2500 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT1116CS8#PBF and LMH7322MA/NOPB, TL3116IDR uniquely combines latch-enable functionality, rail-to-rail input, and industrial temperature rating in a single SOIC-8 package - making it optimal for fault-critical, ground-referenced, high-speed decision circuits where timing predictability and layout simplicity are essential.

Availability

TL3116IDR is available at Aetrix Electronics and suitable for switch-mode power supplies, motor control systems, industrial safety interlocks, and high-speed data acquisition requiring stable component supply across extended temperature ranges.

Supply support for TL3116IDR 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 high-speed signal conditioning.

The TL3116IDR belongs to TI's high-speed comparator product line, engineered for industrial and automotive applications demanding fast, reliable, and latch-synchronized voltage decision-making under harsh thermal conditions.

FAQ

What is the maximum allowable differential input voltage for TL3116IDR?

The absolute maximum differential input voltage (V_ID) for TL3116IDR is 7 V, defined as the voltage between IN+ and IN− pins. Exceeding this rating risks permanent damage to the input stage. This limit applies across the full operating temperature range (−40°C to +85°C) and is independent of supply voltage configuration (±5 V or +5 V only). Always ensure transient clamping or series resistance limits peak differential stress during fault conditions.

Does TL3116IDR support single-supply operation with 3.3 V?

No, TL3116IDR is not specified for 3.3 V single-supply operation. Its electrical characteristics - including propagation delay, output voltage swing, and input common-mode range - are guaranteed only for +5 V (single supply) or ±5 V (split supply). At 3.3 V, output drive strength degrades, propagation delay increases beyond 20 ns, and input offset voltage may exceed 10 mV. For 3.3 V systems, consider TI's TLV3501 or similar 3.3 V-optimized comparators.

How does the latch-enable function behave during power-up?

During power-up, TL3116IDR's latch-enable input defaults to inactive (high-impedance until biased), and outputs remain in high-impedance state until both supplies stabilize and input signals settle. The device requires ≥100 µs after V_CC+ reaches 4.5 V before latch-enable responds reliably. To prevent spurious latching, hold LATCH ENABLE low via pull-down resistor (≤10 kΩ) until system initialization completes, then assert high only after valid input conditions are established.

Can TL3116IDR drive a 50 Ω transmission line directly?

No, TL3116IDR cannot drive a 50 Ω transmission line directly. Its open-collector outputs are rated for ±20 mA continuous sink/source but lack the 25–50 mA peak current and controlled slew rate required for clean 50 Ω line driving. Attempting direct connection causes excessive voltage drop (<2 V swing), overshoot, and timing skew. Use a dedicated line driver (e.g., SN65LVDS1) or buffer amplifier stage between TL3116IDR outputs and the 50 Ω load.

Is TL3116IDR pin-compatible with TL3116CD?

Yes, TL3116IDR is pin-compatible with TL3116CD - both use identical SOIC-8 (D) package footprints, pin assignments, and electrical interface definitions. The only differences are temperature grade (TL3116CD: 0°C to 70°C; TL3116IDR: −40°C to 85°C) and reliability screening. TL3116IDR may be used as a drop-in replacement in existing TL3116CD designs when extended temperature operation or enhanced long-term stability is required, provided PCB layout and thermal management accommodate the wider range.