器件名称: 74AHC245D
功能描述: Octal bus transceiver; 3-state
文件大小: 88.54KB 共20页
简 介:INTEGRATED CIRCUITS
DATA SHEET
74AHC245; 74AHCT245 Octal bus transceiver; 3-state
Product specication Supersedes data of 1998 Sep 21 File under Integrated Circuits, IC06 1999 Sep 28
Philips Semiconductors
Product specication
Octal bus transceiver; 3-state
FEATURES ESD protection: HBM EIA/JESD22-A114-A exceeds 2000 V MM EIA/JESD22-A115-A exceeds 200 V CDM EIA/JESD22-C101 exceeds 1000 V Balanced propagation delays All inputs have a Schmitt-trigger action Inputs accepts voltages higher than VCC For AHC only: operates with CMOS input levels For AHCT only: operates with TTL input levels Specified from 40 to +85 and +125 °C. DESCRIPTION The 74AHC/AHCT245 is a high-speed Si-gate CMOS device. The 74AHC/AHCT245 is an octal transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The 74AHC245/74AHCT245 features an Output Enable (OE) input for easy cascading and a send/receive (DIR) input for direction control. OE controls the outputs so that the buses are effectively isolated. Note 1. H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state. FUNCTION TABLE See Note 1. INPUTS OE L L H DIR L H X
74AHC245; 74AHCT245
INPUTS/OUTPUTS An A=B inputs Z Bn inputs B=A Z
QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf ≤ 3.0 ns. TYPICAL SYMBOL tPHL/tPLH CI CO CPD PARAMETER propagation delay An to Bn, Bn to An input capacitance output capacitance power dissipation capacitance CL = 50 pF; f = 1 MHz……
