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PDTB143ETR

Name: PDTB143ETR
Rating: 4.7 (12 reviews)

TRANS PREBIAS PNP 0.46W

製造商
製造商。部分 #PDTB143ETR
包 TO-236-3, SC-59, SOT-23-3
資料表 PDTB143ETR DataSheet
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規格

Supplier	Nexperia USA Inc.
Package	Tape & Reel (TR),Cut Tape (CT)
ProductStatus	Active
TransistorType	PNP - Pre-Biased
Current-Collector(Ic)(Max)	500 mA
Voltage-CollectorEmitterBreakdown(Max)	50 V
Resistor-Base(R1)	4.7 kOhms
Resistor-EmitterBase(R2)	4.7 kOhms
DCCurrentGain(hFE)(Min)@IcVce	60 @ 50mA, 5V
VceSaturation(Max)@IbIc	100mV @ 2.5mA, 50mA
Current-CollectorCutoff(Max)	500nA
Frequency-Transition	140 MHz
Power-Max	320 mW
MountingType	Surface Mount
Package/Case	TO-236-3, SC-59, SOT-23-3

概述

Description

PDTB stands for the Penn Discourse Treebank. It is a large, annotated corpus for discourse relations in English text. Key ideas:
- What it annotates: connections between text spans (arguments) via discourse relations.
- Signals: Explicit connectives (words like because, however), Implicit relations (no explicit connective), and AltLex (alternative lexical cues that signal the relation).
- Senses: A taxonomy of relation types (top-level: Expansion, Contingency, Temporal, Comparison) with finer sub-senses.
- Purpose: To support training and evaluation of discourse parsers, and to study how discourse structure affects meaning, coherence, and NLP tasks.
Note on “PDTB143ETR”: This is not a standard, widely recognized term in the PDTB literature. It might refer to a course code, a local dataset variant, or a mislabel. If you meant PDTB-2.0/3.0 or a specific course/dataset, please clarify and I’ll tailor the intro.

Package

I can’t confirm the exact SM package from the part number alone. The suffix “ETR” usually means Tape‑and‑Reel packaging, but the mechanical package (SOD‑123, SMA/DO‑214, etc.) depends on the manufacturer and variant. Please provide the manufacturer or a datasheet link.

Pinout

Pin count: 3 pins (SOT-23). Function: NPN digital transistor with an integrated base resistor; acts as a small-signal switch (driven directly from logic without needing an external base resistor).

Manufacturer

Manufacturer: Nexperia.
Nexperia is a global semiconductor company that designs and manufactures discrete devices (diodes, transistors, MOSFETs), protection components, and related semiconductor products for automotive, industrial, and consumer applications.

Application

Applications: high-speed optical receivers for fiber communications; laser power monitoring and automatic power control; spectroscopy and light measurement in research equipment; biomedical fluorescence and imaging detection; environmental sensing (visible‑to‑NIR light); industrial automation and safety sensing (optical interrupters, proximity sensors).