Overview
The MC74HCT245ADTG, produced by onsemi, is a high-performance Silicon-Gate CMOS octal 3-state noninverting bus transceiver. This device is identical in pinout to the LS245 and can be used as a level converter for interfacing TTL or NMOS outputs to high-speed CMOS inputs. It facilitates 2-way asynchronous communication between data buses and features an active-low Output Enable pin to place the I/O ports into high-impedance states. The Direction control determines the direction of data flow between the two data ports A and B.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC (DC Supply Voltage) | 4.5 | 5.5 | V |
| VIN, VOUT (DC Input, Output Voltage) | 0 | VCC | V |
| TA (Operating Free-Air Temperature) | -55 | 125 | °C |
| tr, tf (Input Rise or Fall Time) | 0 | 500 | ns |
| VIH (Minimum High-Level Input Voltage) | 2.0 | 2.0 | V |
| VIL (Maximum Low-Level Input Voltage) | 0.8 | 0.8 | V |
| VOH (Minimum High-Level Output Voltage) | 4.4 | 5.4 | V |
| VOL (Maximum Low-Level Output Voltage) | 0.1 | 0.1 | V |
| Iin (Maximum Input Leakage Current) | ±1.0 | ±1.0 | µA |
| IOZ (Maximum Three-State Leakage Current) | ±5.0 | ±10 | µA |
| ICC (Maximum Quiescent Supply Current) | 4.0 | 40 | µA |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- TTL/NMOS-Compatible Input Levels
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 4.5 to 5.5 V
- Low Input Current: 1.0 µA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 308 FETs or 77 Equivalent Gates
- Pb-Free, Halogen-Free, and RoHS Compliant
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications
Applications
The MC74HCT245ADTG is versatile and can be used in various applications, including:
- Level conversion between TTL/NMOS and CMOS logic levels
- 2-way asynchronous communication between data buses
- High-speed data transmission in digital systems
- Automotive and industrial control systems requiring high reliability and compliance with automotive standards
- General-purpose logic circuits where high noise immunity and low power consumption are essential
Q & A
- What is the primary function of the MC74HCT245ADTG?
The MC74HCT245ADTG is a 3-state noninverting transceiver used for 2-way asynchronous communication between data buses and can also serve as a level converter between TTL/NMOS and CMOS logic levels.
- What is the operating voltage range of the MC74HCT245ADTG?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the maximum input leakage current of the MC74HCT245ADTG?
The maximum input leakage current is ±1.0 µA.
- Is the MC74HCT245ADTG compatible with CMOS, NMOS, and TTL outputs?
- What is the chip complexity of the MC74HCT245ADTG?
The chip complexity is 308 FETs or 77 equivalent gates.
- Is the MC74HCT245ADTG RoHS compliant?
- What is the purpose of the Output Enable pin?
The Output Enable pin is used to place the I/O ports into high-impedance states.
- How does the Direction control work?
The Direction control determines whether data flows from port A to port B or from port B to port A.
- What are the packaging options for the MC74HCT245ADTG?
The device is available in SOIC-20 Wide and TSSOP-20 packages.
- Is the MC74HCT245ADTG suitable for automotive applications?
