Vishay Releases New VEMT Series of Silicon NPN Phototransistors In PLCC 2 Package That is Compatible With Lead (Pb)-Free Soldering

Featuring 2-µs Rise and Fall Times and ± 60° Angle of Half Intensity, Devices are 100 % Compatible with Current TEMT Series for Easy Replacement

MALVERN, Pa. — April 4, 2008 — Vishay Intertechnology, Inc. (NYSE: VSH) continues to broaden its optoelectronics portfolio with the release of a new series of wide-angle phototransistors in a PLCC-2 surface mount package that is compatible with lead (Pb)-free soldering. Devices in the VEMT series serve as pin-to-pin and functional equivalents for the current TEMT series of phototransistors, enabling simple and quick migration to meet lead (Pb)-free soldering requirements.

Vishay’s current TEMT series of phototransistors are lead (Pb)-free PLCC-2 devices, but they require lead (Pb)-based solder. The new VEMT series of phototransistors feature the same specifications as the TEMT series devices, but are compatible with lead (Pb)-free reflow soldering processes according to JEDEC-STD-020D. Optical, electrical, and mechanical compatibility allow for easy replacement of the TEMT phototransistors.

The VEMT3700, VEMT3700F, and VEMT4700 are optimized for object sensing, optical switching, proximity sensing, shaft encoding, data transmission, thumb wheel sensors, and touch key applications in distribution products such as ATMs, coin machines, and vending machines; consumer products; and automotive, EMS, and industrial systems.

Device Specification Table

Part number	Peak Wavelength (nm)	Bandwidth³ (nm)	Collector Light Current², I_ca (mA)	Angle of Half Sensitivity (±°)	Rise and Fall Time¹, t_r/t_f (µs)
VEMT3700	850	450 to 1100	0.5	60	2
VEMT3700F	940	830 to 1100	0.5	60	2
VEMT4700	850	450 to 1080	0.5	60	2
Note 1 - Speed: R_L = 100 Ω, λ= 950 nm, V = 5 V Note 2 - Collector Light Current: V_CE = 5 V, Ee =1 mW/cm², λ=950 nm, typical Note 3 . Bandwidth λ_0.1 nm

Samples and production quantities of the new VEMT series of phototransistors are available now, with lead times of four to six weeks.

Vishay Intertechnology, Inc., a Fortune 1,000 Company listed on the NYSE (VSH), is one of the world's largest manufacturers of discrete semiconductors (diodes, rectifiers, transistors, and optoelectronics and selected ICs) and passive electronic components (resistors, capacitors, inductors, sensors, and transducers). These components are used in virtually all types of electronic devices and equipment, in the industrial, computing, automotive, consumer, telecommunications, military, aerospace, and medical markets. Its product innovations, successful acquisition strategy, and ability to provide "one-stop shop" service have made Vishay a global industry leader. Vishay can be found on the Internet at http://www.vishay.com.

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