Texas Instruments CD54HC245, CD54HCT245, CD74HC245, CD74HCT245 Data Handbook
Summary
These high-speed octal three-state transceivers are essential components for robust, bidirectional data bus communication in digital electronics. Designed with low power consumption and high drive capabilities, they facilitate reliable data transfer between two asynchronous buses. This manual provides comprehensive technical documentation, including detailed pinouts, electrical specifications, operating conditions, and application guidelines. It is the essential resource for engineers and circuit designers implementing demanding data interconnectivity solutions.
Page 1 Text Content
CD54HC245, CD54HCT245, CD74HC245, CD74HCT245
Data sheet acquired from Harris Semiconductor SCHS119 High Speed CMOS Logic Octal-Bus Transceiver,
November 1997 Three-State, Non-Inverting
Features Buffered Inputs [ /Title Three-State Outputs
(CD54 Bus Line Driving Capability HC245
Typical Propagation Delay (A to B, B to A) 9ns at VCC = 5V, CL = 15p F, TA = 25o C
Fanout (Over Temperature Range)
HCT24
Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
5, Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads CD74
Wide Operating Temperature Range . . . -55o C to 125o C
HC245
Balanced Propagation Delay and Transition Times Significant Power Reduction Compared to LSTTL
Logic ICs
HCT24
HC Types
2V to 6V Operation
/Sub-
High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
(High
HCT Types
Speed
4.5V to 5.5V Operation Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min) CMOS Input Compatibility, Il 1µA at VOL, VOH
Pinout CD54HC245, CD54HCT245, CD74HC245, CD74HCT245
(CERDIP, PDIP, SOIC) TOP VIEW
1DIR VCC A0 OE A1 B0 A2 B1 A3 B2 A4 B3
A7 B6 GND B7
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1651.1
Copyright © Harris Corporation 1997
Page Summary Contents For Texas Instruments CD54HC245, CD54HCT245, CD74HC245, CD74HCT245 Data Handbook
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 7 |
| File Size | 37.84 KB |
| Published | May 29, 2026 |
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Frequently Asked Questions
What kind of communication is this device intended for?
It is designed as a three-state bidirectional transceiver intended for two-way asynchronous communication between data buses.
How do I initialize the inputs to prevent excess current draw?
All I/O terminals should be terminated with 10kΩ to 1MΩ resistors when in High-Z (Isolation) modes.
What is the operating temperature range of these transceivers?
The operating temperature range is -55°C to 125°C.
Are there differences between HC and HCT types?
HC types support 2V to 6V operation, while HCT types operate in the 4.5V to 5.5V range for input/output voltage compatibility.