Vishay Semiconductor Opto Division TEMT7100ITX01

Overview

TEMT7100ITX01 from Vishay Semiconductors is a silicon NPN epitaxial planar phototransistor with daylight-blocking filter in a surface-mount 0805 package (2.0 × 1.25 × 0.85 mm), rated for V_CEO = 20 V, I_C = 20 mA, and operating from −40 °C to +110 °C. It delivers 225–675 μA collector light current under 1 mW/cm² irradiance at 950 nm, with ±60° half-sensitivity angle and peak sensitivity at 870 nm.

For engineers reviewing the TEMT7100ITX01 datasheet, TEMT7100ITX01 pinout, TEMT7100ITX01 application, or TEMT7100ITX01 equivalent, key selection criteria include spectral match to 830–950 nm IR emitters, AEC-Q101 qualification for automotive use, daylight rejection capability, thermal stability up to +110 °C, and compatibility with standard 0805 reflow profiles per J-STD-020.

Technical Context

The TEMT7100ITX01 operates as a light-controlled NPN transistor where incident IR radiation generates base current, modulating collector current without external biasing. Its integrated daylight-blocking filter suppresses visible spectrum response while optimizing responsivity between 750 nm and 1010 nm - specifically aligned with common IR emitters like VSMB1940X01.

It features a fixed emitter-collector configuration in a two-terminal SMD package, with no base terminal access. Thermal resistance is 270 K/W, enabling stable operation up to +110 °C ambient when power dissipation remains ≤100 mW below +55 °C, derating linearly beyond that point.

Key Specifications

Pinout & Package

TEMT7100ITX01 is a two-terminal phototransistor in a 0805 surface-mount package (2.0 × 1.25 × 0.85 mm) with no base connection. The device has anode (emitter) and cathode (collector) terminals identified by physical orientation on the black molded body per Vishay package drawing 19757.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar phototransistor detection applications.

Compared with TEMT6200FX01 and QSE159, the TEMT7100ITX01 uniquely combines AEC-Q101 qualification, daylight rejection, and 0805 SMT compatibility - making it the only option qualified for production automotive sensing and compact industrial encoders requiring ambient-light robustness.

Availability

TEMT7100ITX01 is available at Aetrix Electronics and suitable for automotive occupancy detection, rotary encoder position sensing, and industrial photo interrupter applications requiring stable component supply, consistent parametric performance, and full traceability across production batches.

Supply support for TEMT7100ITX01 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

Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, Pennsylvania.

The TEMT7100ITX01 belongs to Vishay's optoelectronics phototransistor product line, engineered specifically for high-reliability, ambient-light-immune detection in automotive and industrial motion-control systems.

FAQ

What is the spectral response range of the TEMT7100ITX01?

The TEMT7100ITX01 has a spectral bandwidth of 750 nm to 1010 nm (λ_0.5) with peak sensitivity at 870 nm. Its integrated daylight-blocking filter suppresses response below 750 nm, making it insensitive to visible light and highly selective for near-infrared radiation from common 850 nm and 940 nm emitters. This ensures stable operation in mixed-light environments where ambient sunlight or artificial lighting would otherwise cause false triggering.

Is the TEMT7100ITX01 compatible with lead-free reflow soldering processes?

Yes, the TEMT7100ITX01 is qualified for lead-free reflow soldering per J-STD-020, with a maximum peak temperature of 260 °C for up to 100 seconds. Its moisture sensitivity level is MSL 4, requiring floor life management: devices must be assembled within 72 hours after opening the moisture barrier bag unless baked per J-STD-020 guidelines. The 0805 package dimensions and thermal profile are fully validated for standard SMT lines.

Does the TEMT7100ITX01 have a base connection for external biasing?

No, the TEMT7100ITX01 is a two-terminal phototransistor with only emitter and collector terminals exposed. It lacks a base connection, operating solely on photogenerated base current. This simplifies circuit design by eliminating external bias networks, but also means gain and response cannot be adjusted via base current injection. All electrical behavior - including I_CA, dark current, and switching speed - is determined solely by illumination intensity, spectral content, and load conditions.

What is the maximum allowable collector current for continuous operation of the TEMT7100ITX01?

The absolute maximum collector current for the TEMT7100ITX01 is 20 mA, specified at T_amb = 25 °C. For continuous operation, actual current must be limited by the load resistor and supply voltage to ensure power dissipation stays within the derated limit: ≤100 mW at T_amb ≤ 55 °C, decreasing linearly to zero at 110 °C. Exceeding these limits risks thermal runaway or permanent degradation of the silicon junction.

How does the TEMT7100ITX01 compare to standard photodiodes in terms of output signal strength?

The TEMT7100ITX01 provides significantly higher output signal strength than photodiodes due to its internal transistor gain - delivering 225–675 μA of collector light current under 1 mW/cm² irradiance at 950 nm, versus typical photodiode short-circuit currents in the 1–10 μA range. This eliminates the need for external amplification in many digital detection applications, reducing BOM count and noise susceptibility. However, it trades off speed (rise/fall times ~1 ms) and linearity for this gain advantage.