器件名称:
74HCT7540
功能描述:
Octal Schmitt trigger buffer/line driver; 3-state; inverting
文件大小:
55.96KB 共7页
简 介:
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/HCT7540 Octal Schmitt trigger buffer/line driver; 3-state; inverting Product specication Supersedes data of March 1988 File under Integrated Circuits, IC06 December 1990 Philips Semiconductors Product specication Octal Schmitt trigger buffer/line driver; 3-state; inverting FEATURES Inverting outputs Schmitt trigger action on all data inputs Output capability: bus driver ICC category: MSI GENERAL DESCRIPTION The 74HC/HCT7540 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns 74HC/HCT7540 The 74HC/HCT7540 are octal Schmitt trigger inverting buffer/line drivers with 3-state outputs. The 3-state outputs are controlled by the output enable inputs OE1 and OE2. A HIGH on OEn causes the outputs to assume a high impedance OFF-state. The Schmitt trigger action in the data inputs transforms slowly changing input signals into sharply defined jitter-free output signals. The “7540” is identical to the “540” but has hysteresis on the data inputs. TYPICAL SYMBOL PARAMETER tPHL/ tPLH CI CPD Notes 1. CPD is used to determine the dynamic power dissipation (PD in W): PD = CP……