Overview
The CD74HCT244M is a high-speed CMOS logic octal buffer/line driver produced by Texas Instruments. This component is part of the 74HCT series, which is designed for compatibility with TTL (Transistor-Transistor Logic) inputs. The CD74HCT244M is a non-inverting three-state buffer with two active-low output enables, making it suitable for a variety of digital logic applications.
The device features a wide operating temperature range from –55°C to 125°C, making it robust for use in diverse environmental conditions. It also offers significant power reduction compared to traditional LSTTL logic ICs.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| Operating Voltage Range | 4.5 to 5.5 | V | |
| Propagation Delay (Data to Outputs) | 9 to 33 | ns | VCC = 5 V, CL = 15 pF, TA = 25°C |
| Output Enable and Disable Time | 30 to 45 | ns | VCC = 5 V, CL = 15 pF, TA = 25°C |
| Output Transition Time | 12 to 18 | ns | VCC = 5 V, CL = 15 pF, TA = 25°C |
| Input Capacitance | 10 | pF | |
| Three-state Output Capacitance | 20 | pF | |
| Power Dissipation Capacitance | 5 to 40 | pF | |
| Operating Temperature Range | –55 to 125 | °C | |
| Package Type | SOIC (M), PDIP (E), CDIP (F), TSSOP (PW) |
Key Features
- Non-inverting three-state buffers with two active-low output enables.
- High-current bus driver outputs capable of driving up to 15 LSTTL loads.
- Buffered inputs and three-state outputs.
- Wide operating temperature range: –55°C to 125°C.
- Significant power reduction compared to LSTTL logic ICs.
- Direct LSTTL input logic compatibility.
- High noise immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5 V.
- Balanced propagation delay and transition times.
Applications
- Digital logic circuits requiring high-speed buffering and line driving.
- Computer and peripheral equipment.
- Telecommunications and networking devices.
- Industrial control systems.
- Automotive electronics.
Q & A
- What is the operating voltage range of the CD74HCT244M?
The operating voltage range is from 4.5 V to 5.5 V.
- What is the propagation delay of the CD74HCT244M?
The propagation delay is typically between 9 ns and 33 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C.
- What is the output enable and disable time of the CD74HCT244M?
The output enable and disable time is typically between 30 ns and 45 ns at VCC = 5 V, CL = 15 pF, and TA = 25°C.
- What is the input capacitance of the CD74HCT244M?
The input capacitance is 10 pF.
- What is the operating temperature range of the CD74HCT244M?
The operating temperature range is from –55°C to 125°C.
- What types of packages are available for the CD74HCT244M?
The component is available in SOIC (M), PDIP (E), CDIP (F), and TSSOP (PW) packages.
- Is the CD74HCT244M compatible with TTL inputs?
Yes, it is designed for direct LSTTL input logic compatibility.
- What is the fanout capability of the CD74HCT244M?
The device can drive up to 15 LSTTL loads.
- Does the CD74HCT244M have high noise immunity?
Yes, it has high noise immunity with NIL = 30%, NIH = 30% of VCC at VCC = 5 V.
- What are some common applications of the CD74HCT244M?
Common applications include digital logic circuits, computer and peripheral equipment, telecommunications and networking devices, industrial control systems, and automotive electronics.
