Texas Instruments TL7726CD

Overview

TL7726CD from Texas Instruments is a hex clamping circuit IC designed to protect CMOS inputs against latch-up and transient overvoltage in analog-to-digital converter interfaces, automotive sensor signal conditioning, and industrial I/O lines. It features six independent clamps, 25-mA sink capability per channel, <1-mW standby dissipation, and operates across 0°C to 70°C with SOIC-8 packaging.

For engineers reviewing the TL7726CD datasheet, TL7726CD pinout, TL7726CD application, or TL7726CD equivalent, this page delivers verified electrical parameters, thermal limits, clamping voltage tolerances, settling time behavior, and real-world protection use cases - all confirmed for the TL7726CD variant specifically.

Technical Context

The TL7726CD implements six identical voltage-clamping circuits referenced to an internal REF pin. Each clamp presents high impedance (<10 µA leakage) when input VI is between GND and VREF (4.5–5.5 V), and switches to low-impedance active state for VI < GND or VI > VREF, sinking up to ±25 mA.

It exhibits no output overshoot, stable operation with any capacitive load, and 30-µs settling time under ±13-V transients with 600-Ω source impedance. Absolute maximum ratings include ±50-mA clamp current and 150°C junction temperature, with thermal resistance θJA = 97°C/W in SOIC-8 package.

Key Specifications

Pinout & Package

TL7726CD uses an 8-pin SOIC (D) package with 1.75-mm max height, JEDEC MS-012 AA compliant footprint, and NIPDAU lead finish. Thermal resistance θJA is 97°C/W; MSL rating is Level-1-260°C-UNLIM.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar clamping circuit applications.

Compared with TL7726ID and TL7726QD, the TL7726CD offers cost-optimized commercial-temperature performance with identical clamping behavior, making it ideal for non-automotive, non-extreme-temperature applications where full automotive qualification is unnecessary.

Availability

TL7726CD is available at Aetrix Electronics and suitable for automotive sensor interface, industrial analog input modules, medical instrumentation front-ends, and test & measurement equipment requiring stable component supply and long-term production continuity.

Supply support for TL7726CD 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies since 1930.

The TL7726CD belongs to TI's legacy protection IC product line, engineered specifically for robust analog signal path safeguarding in harsh electromagnetic environments - emphasizing latch-up immunity, low-power standby, and predictable clamping thresholds.

FAQ

What is the reference voltage range supported by TL7726CD?

The TL7726CD accepts a reference voltage (VREF) between 4.5 V and 5.5 V, as specified in its recommended operating conditions. This range sets the upper clamping threshold at VREF + 200 mV and the lower threshold at GND – 200 mV. The TL7726CD must be used with a stable, low-noise 5-V reference source; deviation outside this window invalidates clamping accuracy and may cause excessive leakage or premature activation.

Does TL7726CD require external components to function?

No, the TL7726CD operates autonomously with only a valid VREF supply and ground connection. Its six clamping channels draw less than 10 µA each when inactive and require no pull-up resistors, RC networks, or biasing elements. External series resistors may be added for current limiting in high-energy transient scenarios, but they are not required for basic clamp functionality - the TL7726CD itself provides the complete clamping action.

Can TL7726CD replace discrete TVS diodes in ESD protection schemes?

The TL7726CD is not a drop-in replacement for TVS diodes in IEC 61000-4-2 ESD testing, as it lacks the sub-nanosecond response needed for direct contact discharge. However, it serves as a complementary, low-leakage, precision clamping stage *after* primary TVS protection - especially effective against slower transients like ISO 7637-2 pulses. For full-system protection, TL7726CD should be used downstream of a fast TVS, not instead of one.

What is the maximum transient voltage TL7726CD can safely clamp?

The TL7726CD does not have a fixed "maximum clamped voltage" - its clamping level depends on source impedance and current. Per Figure 3 in the datasheet, with a 10-kΩ series resistor, TL7726CD can limit input voltage to 255 V for a 25-mA clamp current. In practice, the absolute limit is governed by its ±50-mA absolute maximum clamp current rating and thermal limits; sustained operation above 25 mA risks exceeding θJA derating and requires board-level thermal design validation for the TL7726CD.

Is TL7726CD pin-compatible with other variants like TL7726ID or TL7726QD?

Yes, TL7726CD is pin-compatible with TL7726ID and TL7726QD - all share identical SOIC-8 (D) package, pin numbering, and functional pin assignments (GND, six CLAMP pins, REF). No PCB layout changes are needed when upgrading from TL7726CD to either variant; only the temperature grade and qualification level differ. This interchangeability simplifies BOM rationalization across commercial, industrial, and automotive product families using the TL7726CD platform.