Texas Instruments 8601401HA

Overview

8601401HA from Texas Instruments is a radiation-hardened high-speed dual comparator in CFP (NAD) package with 10 pins, ±15V or single 5V supply operation, 80 ns typical response time, and input offset voltage ≤±6.8 mV. It serves as a precision voltage decision element in space-grade analog monitoring circuits requiring ELDRS-free performance up to 100 krad(Si).

For engineers reviewing the 8601401HA datasheet, 8601401HA pinout, 8601401HA application, or 8601401HA equivalent, this device is selected for high-reliability dual-threshold detection where radiation tolerance, wide common-mode range (±12 V), and uncommitted collector outputs enabling TTL/DTL/RTL compatibility are critical design requirements.

Technical Context

The 8601401HA implements two independent open-collector comparators on a monolithic die, each featuring differential inputs with high common-mode slew rate and isolation from system ground. Its architecture supports operation across ±15V supplies or down to a single 5V logic rail, with output capable of sinking 25 mA while maintaining low input bias current (≤0.95 µA) and high voltage gain (≥10 kV/V).

Designed for military and space applications, it meets MIL-STD-883 Class B testing per subgroup 1–14, including dynamic and switching tests at −55°C, 25°C, and 125°C. Radiation qualification includes High Dose Rate (100 krad(Si)) and ELDRS-Free (100 krad(Si)) variants, with post-radiation VIO shift limited to ±0.4 mV at 25°C.

Key Specifications

Pinout & Package

8601401HA uses a hermetically sealed Ceramic Flatpack (CFP) package designated NAD0010A (10-pin), with case connected to Pin 5 (V−). The package is leaded, non-RoHS compliant, and rated for 260°C soldering (10 sec).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM119WRLQMLV and 5962R9679802VHA, the 8601401HA provides full MIL-STD-883 subgroup 1–14 testing plus ELDRS-Free validation per Condition D, making it the only option among the three qualified for extended-duration deep-space missions where low-dose-rate effects must be eliminated.

Availability

8601401HA is available at Aetrix Electronics and suitable for spacecraft power management, radiation-tolerant instrumentation, and defense-grade analog monitoring requiring stable component supply across extended product lifecycles.

Supply support for 8601401HA 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 and embedded processing solutions, with decades of heritage in high-reliability aerospace and defense components.

The LM119QML product line delivers radiation-hardened comparators for mission-critical systems where parametric stability under ionizing radiation and extreme temperature cycling is non-negotiable.

FAQ

What is the maximum supply voltage rating for the 8601401HA?

The 8601401HA supports a total supply voltage of up to 36 V, with absolute maximum ratings of ±15 V across V+ and V− terminals. Operation above ±15 V is prohibited, and the device must never see more than 16 V between GND and V+ per datasheet warning. These limits ensure safe junction temperature and prevent oxide breakdown in the radiation-hardened process.

Does the 8601401HA require external pull-up resistors on its outputs?

Yes, the 8601401HA features open-collector outputs (OUTPUT 1 and OUTPUT 2), so external pull-up resistors are mandatory to establish a defined logic-high state. Typical values range from 1 kΩ to 10 kΩ depending on rise time and load capacitance; the device can sink up to 25 mA per output when active low.

Is the 8601401HA pin-compatible with standard LM119 variants in CDIP or LCCC packages?

No, the 8601401HA uses a 10-pin CFP (NAD) package, whereas CDIP versions (e.g., 8601401CA) have 14 pins and LCCC versions (e.g., 86014012A) have 20 pins. Pin count, layout, and thermal pad configuration differ fundamentally - direct PCB replacement is not possible without redesign.

What radiation test standards does the 8601401HA meet?

The 8601401HA is qualified to MIL-STD-883 Method 1019 Condition A (High Dose Rate) and Condition D (ELDRS-Free), both at 100 krad(Si). It undergoes full Group B testing across subgroups 1–14, including dynamic, switching, and settling time verification at −55°C, 25°C, and 125°C before and after irradiation.

Can the 8601401HA operate from a single 5V supply?

Yes, the 8601401HA is explicitly specified for single 5V operation (V+ = 5V, V− = 0V), with guaranteed performance including input offset voltage ≤±6.8 mV, output saturation voltage ≤0.6 V at 3.2 mA, and fan-out of ≥2 TTL loads per side - enabling direct integration into 5V logic systems without auxiliary supplies.