About TT Electronics IRC
We design and manufacture resistors and precision resistor networks. We are recognised as being an innovative leader in the design, development and manufacture of resistors since the very beginning of the electronics industry. We are trusted by designers to provide custom solutions for critical applications from space flight controllers to medical defibrillators.
Technical Resources
| Technical Resource | Download |
|---|---|
| Resistors Short Form Brochure | Download |
| Circuit Protection Application Note | Download |
| Current Sense Application Note | Download |
| Energy Metering Application Note | Download |
| Glass Sealed Ultra-High Value Resistors Application Note | Download |
| High Current Shunt Capabilities | Download |
| High Speed Digital Data Terminations Application Note | Download |
| High Voltage Application Note | Download |
| Lighting Circuits Application Note | Download |
| Medical Application Note | Download |
| Planar Surge Resistors Application Note | Download |
| Replacement of CHP & HSF with Flat Chip Resistors | Download |
| Resistor Capacitor Chip Network Application Note | Download |
| Resistors for Welding Power Supplies Application Note | Download |
| Lead Form Capability | Download |
| UL Recognised Fusible Resistors Application Note | Download |
| WDBR Series Application Note | Download |
| Wirewound Pulse & Overload Application Note | Download |
| PS002 - Packing Specification Axial Resistors (IRC Origin) | Download |
| PS001 - Packing Specification General Purpose Chip Resistors | Download |
| Technical Note TN001: Advice on Storage Conditions for Fixed Resistors | Download |
| Technical Note TN005 - EIA Standard Values for Resistors | Download |
| Technical Note TN007 - Instant Access to Life Cycle and Obsolete Product Data Online for TT | Download |
| Technical Note TN002: Instant Access to RoHS, REACH, Conflict Mineral and Other Compliance Data Online | Download |
| Technical Note TN004: Methods for Marking Values on Resistors | Download |
Product Range
LRMAN1225
LRMAN1225 is an inverse format metal alloy current sense resistor. It complements the existing range of inverse format parts in 0612 and 0815 size and provides a power rating of 3W.
With values down to 2mΩ, this product provides a useful alternative to thick film on ceramic types for applications where high current surges are possible, or where TCR must be restricted to ±100ppm/°C.
Applications:
- Power supplies
- Small motor control
- DC-DC convertors
Features:
- Power rating 3W
- Values down to R002
- TCR ±100ppm/°C
- High pulse handling capability
Benefits
- Inverse format is more robust under conditions of thermal cycling or board flexing, leading to lower cost of field failures
- Surge tolerant resistor enhances reliability and reduces field failures in applications exposed to electrical surges
Product Documentation
LRMAN1225 Datasheet | PDF
LRMAN1225 Fast Facts | PDF
LRMAN1225 Product Focus | PDF
QSOP-C & SOIC-C TaN film
We are pleased to announce the launch of QSOP-C & SOIC-C TaN film on ceramic networks, manufactured at the TT electronics IRC Corpus Christi site.
Features
- Ultra-stable TaN resistors on ceramic substrate
- Lower cross-talk than silicon-based types
- Reliable, with no internal cavity
- QSOP16/20/24 & SOIC8/14/16/20 packages
- Isolated or bussed networks
- Up to 23 precision resistors
- ±5ppm/°C TCR tracking and ±0.05% ratio
Benefits
- Improved reliability under high humidity conditions reduces field failure costs
- Integrated solution saves cost of PCB space through low footprint design
- High lifetime stability avoids or reduces recalibration costs in measurement systems
TT Electronics, a global provider of engineered electronics for performance critical applications, has launched the QSOP-C and SOIC-C high-density resistor networks that combine high precision with stability and reliability. By using a ceramic substrate and a relatively large feature size, they offer better cross-talk performance than types based on silicon substrates.
With target markets in the aerospace, medical and industrial areas, the parts are aimed at designers of analogue circuits such as amplifiers and ADCs requiring accurate gain and threshold levels defined by resistance ratios, where the operating temperature range is wide, humidity levels may be high, reliability level is paramount and periodic recalibration is not possible.
TT Electronics' QSOP-C and SOIC-C series resistor networks are particularly beneficial for use in aerospace and high reliability signal processing applications, as the parts are optionally available with thermal shock screening. Specific applications include flight computers, medical monitors and critical process monitors.
Factors driving the demand for these types of components are the use of COTs passive devices in the aerospace sector, and rising operating frequencies making low crosstalk a more important feature.
The use of Tantalum Nitride film technology makes the QSOP-C and SOIC-C series resistor networks ultra-reliable as an inherently moisture-proof film system, and their ceramic based element offers lower crosstalk than silicon based alternatives. Reducing the PCB area required, up to 23 resistors are available in a single component.
The QSOP-C series feature a high resistor density with .025" lead spacing, and are available in standard JEDEC 16, 20, and 24 pin packages. The 24-pin version measures 8.66 x 6.02 mm including leads. Resistor ranges of 100R to 150K are available. The SOIC series are available in narrow and wide body versions in standard JEDEC 8, 14, 16, and 20 pin packages. 100R to 200K resistance ranges are available.
Both series share an operating temperature range of -55 to +125 degrees C and with precision figures of +/- 15ppm per degree C TCR (temperature coefficient of resistance) tracking, and +/- 0.05 % ratio tolerance, the resistors consume a smaller amount of the designer's error budget.
MIL-PRF-55342 Precision Military and Space Qualified Chip Resistors MIL-CHIP Series
- Now qualified to MIL-PRF-55342 Space Level T
- Seven industry standard sizes available
- MIL-PRF-55342 Characteristics E, H, K, and M
- MIL-PRF-55342 extended reliability
Levels C, M, P, R, S and T
Product Documentation
Hollow Shaft Position Sensors8900 Space Series Surface Mount Flat Packs Resistor Networks
- 100% screened to NASA EEE-INST-002 Level 1
- Gold to gold bonded lead construction
- No internal solder connections or wire bonds
- Excellent passive solution for space flight hardware
- Self Passivating TaNFilm® element with superior moisture performance
Product Documentation
Wire Bondable Chip Resistors - (WBC Series)
- Discrete or tapped schematics
- MIL inspection available
- High resistor density
IRC’s WBC series wire bondable chip resistors are ideally suited for the most demanding hybrid application. The WBC combines IRC’s TaNSil® tantalum nitride thin film technology with silicon substrate processing to produce an extremely small footprint device with the proven stability, reliability and moisture performance of IRC’s TaNSil® resistor film.
