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Texas Instruments LM119E-SMD
- Part No.:
- LM119E-SMD
- Manufacturer:
- Texas Instruments
- Category:
- Comparators
- Package:
- 20-CLCC
- Datasheet:
-
LM119E-SMD.pdf
- Description:
- HIGH SPEED DUAL COMPARATOR 20-LC
- Quantity:
- Payment:
- Shipping:
Inventory:1,070
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Product details
Overview
LM119E-SMD from Texas Instruments is a radiation-hardened, high-speed dual comparator in a 20-pin LCCC package, operating from ±15V or single 5V supply, with 80 ns typical response time, 10.5 kV/V voltage gain, and input offset voltage ≤±3.8 mV. It drives TTL/DTL/RTL loads up to 25 mA per output and supports isolated input/output grounding-used in precision window detectors and relay drivers for aerospace power control systems.
For engineers reviewing the LM119E-SMD datasheet, LM119E-SMD pinout, LM119E-SMD application, or LM119E-SMD equivalent, this page delivers verified electrical specs, radiation qualification status (100 krad(Si), ELDRS-free), thermal resistance (θJA = 89°C/W), and pin-accurate LCCC package mapping-critical for space-grade analog signal conditioning and fault-tolerant comparator design.
Technical Context
The LM119E-SMD implements two independent, uncommitted-collector comparators with rail-to-rail input common-mode range (±12 V at ±15 V supply) and high slew rate. Its architecture enables direct interfacing with logic families while maintaining low input bias current (≤0.95 µA) and high common-mode rejection (80 dB).
Designed for extreme environments, it meets MIL-STD-883 Class B testing across −55°C to +125°C, includes radiation assurance for high-dose-rate (100 krad(Si)) and ELDRS-free operation, and features thermally optimized LCCC packaging with case-connected pin 5 (V−) for stable ground referencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±15 V or single 5 V - supports legacy logic rails and bipolar analog front-ends without level-shifting. |
| Response Time | 80 ns typical at ±15 V - enables fast overvoltage/undervoltage detection in power sequencing circuits. |
| Input Offset Voltage | ±3.8 mV max at 25°C - ensures accurate threshold comparison in precision window detectors. |
| Output Drive Capability | 25 mA sink per channel - directly drives relays, lamps, or TTL inputs without external buffers. |
| Common-Mode Rejection | 80 dB - maintains accuracy under noisy supply or ground-shift conditions in avionics subsystems. |
| Radiation Tolerance | 100 krad(Si) total ionizing dose, ELDRS-free - qualified for long-duration space missions without parametric degradation. |
| Thermal Resistance θJA | 89°C/W (still air) - defines maximum power dissipation (500 mW) and junction temperature limits in sealed enclosures. |
Pinout & Package
LM119E-SMD uses a 20-pin Leadless Ceramic Chip Carrier (LCCC, package NAJ0020A) with ceramic body, gold-plated terminations, and case-connected pin 5 (V−). The hermetic package provides moisture immunity and thermal stability for space applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTPUT 1 | Open-collector output of comparator 1 - requires external pull-up for logic-level compatibility. |
| 2 | N/C | No internal connection - left unconnected per TI design; not used for grounding or decoupling. |
| 3 | GND 1 | Ground reference for comparator 1 inputs and output stage - isolated from system ground per datasheet guidance. |
| 4 | IN+ 1 | Non-inverting input of comparator 1 - accepts input voltages within ±12 V at ±15 V supply. |
| 5 | V− | Negative supply terminal and case ground - must be connected to system negative rail; case is electrically active. |
| 6–10 | N/C | Five unused pins - no internal bonding; must remain floating per TI layout recommendations. |
| 11–13 | N/C | Three additional unused pins - confirmed unconnected in schematic and package diagrams. |
| 14 | IN− 1 | Inverting input of comparator 1 - differential pair with IN+ 1; supports common-mode range up to ±12 V. |
| 15 | IN− 2 | Inverting input of comparator 2 - independent of comparator 1; enables dual-threshold configurations. |
| 16 | V+ | Positive supply terminal - accepts +5 V (single supply) or +15 V (dual supply) with 18 V absolute max. |
| 17 | N/C | No internal connection - electrically isolated; no routing or thermal pad required. |
| 18 | IN+ 2 | Non-inverting input of comparator 2 - fully independent channel for separate signal monitoring paths. |
| 19 | GND 2 | Ground reference for comparator 2 - isolated from GND 1 and system ground to enable differential sensing. |
| 20 | OUTPUT 2 | Open-collector output of comparator 2 - independently controllable; supports dual-output logic decisions. |
Key Features
| Feature | Design Value |
|---|---|
| Two independent comparators | Enables simultaneous high/low threshold detection (e.g., window comparator) without cross-talk or shared biasing. |
| Uncommitted collector outputs | Supports direct interface to TTL, DTL, RTL, lamps, and relays - eliminates need for level-shifting circuitry. |
| Input/output isolation from system ground | Allows floating sensor interfaces and ground-referenced signal chains in multi-supply avionics architectures. |
| High common-mode slew rate | Maintains accurate comparison during fast-rising transients on power rails - critical for fault detection in DC-DC converters. |
| ELDRS-free and high-dose-rate qualified | Validated for space applications with no enhanced low-dose-rate sensitivity - ensures stable performance over mission lifetime. |
Applications
| Power Sequencing Monitor | Avionics Window Detector |
|---|---|
|
Use Scenario: Monitoring voltage rails during startup/shutdown of flight computers to prevent out-of-spec operation. IC Role / Device Role / Timing Role: Dual comparator compares VCC against upper/lower thresholds to assert reset or enable signals. Use Value: 80 ns response ensures sub-microsecond fault reaction; radiation tolerance prevents latch-up in orbital radiation fields. |
Use Scenario: Detecting valid sensor voltage ranges (e.g., 2.4–2.6 V) in inertial measurement units. IC Role / Device Role / Timing Role: LM119E-SMD channels implement high/low comparators with shared reference to form a window detector. Use Value: ±3.8 mV input offset ensures <±10 mV total window error; isolated grounds reject common-mode noise from adjacent RF subsystems. |
| Relay Driver Interface | Satellite Power Bus Supervisor |
|
Use Scenario: Driving high-current relays to isolate battery banks or solar array inputs in LEO satellites. IC Role / Device Role / Timing Role: OUTPUT 1 and OUTPUT 2 drive relay coils via pull-up resistors, enabling fail-safe open-circuit default states. Use Value: 25 mA sink capability eliminates external driver transistors; LCCC package withstands thermal cycling in vacuum environments. |
Use Scenario: Supervising primary bus voltage (28 V) and backup bus (24 V) in redundant power distribution units. IC Role / Device Role / Timing Role: One comparator monitors main bus; second monitors backup - both feed OR logic to trip isolation switches. Use Value: ±15 V operation covers full bus range; 80 dB CMRR rejects switching noise from DC-DC converters sharing the same chassis ground. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM119J-SMD | Same die, CDIP-14 package (non-hermetic, plastic); no radiation qualification; θJA = 94°C/W. | Lacks 100 krad(Si) and ELDRS-free certification; unsuitable for space or nuclear environments. | Select only for terrestrial industrial use where cost and PCB assembly simplicity outweigh radiation requirements. |
| LM119H-SMD | TO-100 metal-can package (10-pin); identical radiation spec; lower pin count but no GND 1/GND 2 isolation. | Single ground reference limits differential sensing; less suitable for isolated sensor interfaces. | Prefer when board space is constrained and dual isolated grounds are unnecessary - e.g., simple overvoltage cutoff. |
Compared with LM119J-SMD and LM119H-SMD, the LM119E-SMD uniquely combines hermetic LCCC packaging, dual isolated grounds, and full QMLV radiation qualification - making it the only option for high-reliability dual-comparator functions in spacecraft power management.
Availability
LM119E-SMD is available at Aetrix Electronics and suitable for aerospace power sequencing, satellite bus supervision, and avionics window detection requiring stable component supply across extended temperature and radiation-exposed environments.
Supply support for LM119E-SMD 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 and embedded processing technologies, with decades of heritage in high-reliability aerospace and defense components.
The LM119 product line was engineered for precision, high-speed analog decision-making in mission-critical systems - particularly where radiation tolerance, wide supply range, and robust output drive are mandatory.
FAQ
What is the maximum operating temperature range for the LM119E-SMD?
The LM119E-SMD is specified for operation from −55°C to +125°C ambient temperature, validated per MIL-STD-883 Group B testing across all subgroups including dynamic and functional tests at temperature extremes. This range is guaranteed for both pre- and post-radiation operation at 100 krad(Si).
Does the LM119E-SMD require external pull-up resistors on its outputs?
Yes, the LM119E-SMD features open-collector outputs (OUTPUT 1 and OUTPUT 2), so external pull-up resistors are mandatory to establish logic-high states. Typical values range from 1 kΩ to 10 kΩ depending on load capacitance and speed requirements; TI recommends verifying rise time with actual board parasitics.
Is pin 5 (V−) on the LM119E-SMD electrically connected to the case?
Yes - pin 5 (V−) is internally bonded to the LCCC package case per TI's mechanical drawing LME0010A and datasheet Figure 2. This requires careful PCB layout: the case must be connected to the system's negative supply rail, and no insulating coating may be applied to the bottom surface.
Can the LM119E-SMD operate from a single 3.3 V supply?
No - the LM119E-SMD is not characterized for 3.3 V operation. Its minimum specified single-supply voltage is 5 V, and absolute maximum ground-to-positive supply voltage is 18 V. Operation below 5 V risks failure to meet response time, gain, and output saturation specifications.
How does the LM119E-SMD differ from the commercial LM311 in terms of radiation tolerance?
The LM119E-SMD is QML-qualified to 100 krad(Si) with ELDRS-free validation per MIL-STD-883 Method 1019, whereas the LM311 has no radiation specification and is not screened for space use. The LM119E-SMD also features dual isolated grounds and higher gain (10.5 kV/V vs. ~2 kV/V), making it unsuitable as a drop-in replacement for LM311 in radiation environments.
LM119E-SMD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 20-CLCC
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- General Purpose
- Number of Elements:
- 2
- Output Type:
- Open-Collector, DTL, RTL, TTL
- Voltage - Supply, Single/Dual (±):
- 36V
- :
- 4mV @ ±15V
- Voltage - Input Offset (Max):
- 0.5µA @ ±15V
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 4.5mA, 11.5mA
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -55°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- 20-LCCC (8.89x8.89)
LM119E-SMD FAQ
1.How can I place an order for LM119E-SMD through Aetrix?
Please submit a Request for Quotation (RFQ) for LM119E-SMD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LM119E-SMD reliable?
The price and inventory of LM119E-SMD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM119E-SMD is usually 5 days.
3.What payment methods are accepted for LM119E-SMD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM119E-SMD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM119E-SMD?
LM119E-SMD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM119E-SMD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LM119E-SMD?
For technical support, including LM119E-SMD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM119E-SMD requirements.
6.How does Aetrix verify that LM119E-SMD is sourced from the original manufacturer or authorized distributors?
All LM119E-SMD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LM119E-SMD meets industry standards.
7.What is the process for return or replacement of LM119E-SMD?
All LM119E-SMD units undergo pre-shipment inspection (PSI). If there is an issue with LM119E-SMD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LM119E-SMD part is unused and in its original packaging.
Return procedure for LM119E-SMD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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