Philips 74HC245 74HCT245 Octal Bus Transceiver 3-State Data Sheet Manual
Summary
The 74HC245/74HCT245 is a high-speed CMOS octal transceiver offering non-inverting 3-state bidirectional outputs for bus interface applications. This product manual provides comprehensive technical documentation for hardware designers and engineers, detailing electrical characteristics, functional diagrams, pin assignments, and available package options (DIP, SOIC, TSSOP). Use this guide to ensure accurate implementation of reliable signal isolation and data transfer in your next electronic design.
Page 1 Text Content
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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
Octal bidirectional bus interface Non-inverting 3-state outputs Multiple package options Complies with JEDEC standard no. 7A ESD protection: HBM EIA/JESD22-A114-B exceeds 2000 MM EIA/JESD22-A115-A exceeds 200 Specified from −40 °C to +85 °C and from −40 °C to +125 °C
3. Quick reference data
Table 1: Quick reference data GND V; Tamb °C; tr tf 6 ns. Symbol Parameter Conditions Min Typ Max Unit Type 74HC245
t PHL, t PLH propagation delay CL p F; ns An to Bn or Bn to An VCC CI input capacitance 3.5 p F CI/O input/output capacitance p F
CPD power dissipation VI GND to VCC p F capacitance per transceiver
Type 74HCT245
t PHL, t PLH propagation delay CL p F; ns An to Bn or Bn to An VCC
Page Summary Contents For Philips 74HC245 74HCT245 Octal Bus Transceiver 3-State Data Sheet Manual
Manual Details
| Brand | Philips |
|---|---|
| Pages | 22 |
| File Size | 117.65 KB |
| Published | July 10, 2026 |
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Frequently Asked Questions
What is the primary function of the 74HC/HCT245?
It is an octal transceiver that provides non-inverting 3-state bus compatible outputs in both send and receive directions.
How can I easily isolate the buses for cascading?
Use the Output Enable (OE) input, as it controls the outputs to effectively isolate the buses.
Does this device support varying temperature ranges?
Yes, it is specified from −40 °C to +85 °C and available up to +125 °C depending on the package.
What kind of packaging options are available for purchase?
Available packages include DIP20, SO20, TSSOP20, SSOP20, and DHVQFN20.