器件名称:
74HCT245BQ
功能描述:
Octal bus transceiver; 3-state
文件大小:
130.69KB 共22页
简 介:
74HC245; 74HCT245 Octal bus tranceiver; 3-state Rev. 03 — 31 January 2005 Product data sheet 1. General description The 74HC245; 74HCT245 is a high-speed Si-gate CMOS device and is pin compatible with Low-Power Schottky TTL (LSTTL). The 74HC245; 74HCT245 is an octal transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. The 74HC245; 74HCT245 features an output enable input (OE) for easy cascading and a send/receive input (DIR) for direction control. OE controls the outputs so that the buses are effectively isolated. The 74HC245; 74HCT245 is similar to the 74HC640; 74HCT640 but has true (non-inverting) outputs. 2. Features s s s s s Octal bidirectional bus interface Non-inverting 3-state outputs Multiple package options Complies with JEDEC standard no. 7A ESD protection: x HBM EIA/JESD22-A114-B exceeds 2000 V x MM EIA/JESD22-A115-A exceeds 200 V s Specied from 40 °C to +85 °C and from 40 °C to +125 °C 3. Quick reference data Table 1: Quick reference data GND = 0 V; Tamb = 25 °C; tr = tf = 6 ns. Symbol tPHL, tPLH CI CI/O CPD Parameter propagation delay An to Bn or Bn to An input capacitance input/output capacitance power dissipation capacitance per transceiver propagation delay An to Bn or Bn to An VI = GND to VCC [1] Conditions CL = 15 pF; VCC = 5 V Min - Typ 7 3.5 10 30 Max - Unit ns pF pF pF Type 74HC245 Type 74HCT245 tPHL, tPLH CL = 15 pF; VCC = 5 V 10 ns Philips Semiconductors 74HC245; 74HCT245 Octal bus trancei……
