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74HCT242

Part Number	74HCT242
Manufacturer	Philips
Description	Quad bus transceiver
Published	Apr 23, 2005
Detailed Description	INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Fam...
Datasheet	74HCT242 PDF File

Overview

INTEGRATED CIRCUITS DATA SHEET For a complete data sheet, please also download: • The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications • The IC06 74HC/HCT/HCU/HCMOS Logic Package Information • The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines 74HC/HCT242 Quad bus transceiver; 3-state; inverting Product speciﬁcation File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product speciﬁcation Quad bus transceiver; 3-state; inverting FEATURES • Inverting 3-state outputs • 2-way asynchronous data bus communication • Output capability: bus driver • ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT242 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL 74HC/HCT242 (LSTTL).
They are specified in compliance with JEDEC standard no.
7A.
The 74HC/HCT242 are quad bus transceivers featuring inverting 3-state bus compatible outputs in both send and receive directions.
They are designed for 4-line asynchronous 2-way data communications between data buses.
The output enable inputs (OEA and OEB) can be used to isolate the buses.
The “242” is similar to the “243” but has inverting outputs.
QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns TYPICAL SYMBOL tPHL/ tPLH PARAMETER propagation delay An to Bn; Bn to An input capacitance input/output capacitance power dissipation capacitance per transceiver notes 1 and 2 CONDITIONS HC CL = 15 pF; VCC = 5 V 7 HCT 10 ns UNIT CI CI/O CPD Notes 3.
5 10 29 3.
5 10 32 pF pF pF 1.
CPD is used to determine the dynamic power dissipation (PD in µW): PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo) where: fi = input frequency in MHz fo = output frequency in MHz ∑ (CL × VCC2 × fo) = sum of outputs CL = output load capacitance in pF VCC = supply voltage in V 2.
For HC the condition is VI = GND to VCC For HCT the condition is VI = GND to VCC − 1.
5 V ORDERING INFORMATION See “74HC/HCT/HCU/HCMOS Logic Package Information”.
December 1990 2 Philips Semiconductors Product speciﬁcation ...

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