Overview
The SN74LVC244A, produced by Texas Instruments, is an octal bus buffer or driver with 3-state outputs. This device is designed for asynchronous communication between data buses and operates within a voltage range of 1.65 V to 3.6 V. It is particularly useful for applications requiring mixed-mode signal operation and supports live insertion, partial-power-down mode, and back-drive protection. The SN74LVC244A is available in various package types, including TSSOP, SOIC, SSOP, and QFN, making it versatile for different design needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| VCC Supply Voltage | 1.65 to 3.6 | V |
| Input Voltage Range | -0.5 to 6.5 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Maximum Propagation Delay (tpd) at 3.3 V | 5.9 ns | ns |
| Typical Output Ground Bounce (VOLP) at VCC = 3.3 V, TA = 25°C | < 0.8 V | V |
| Typical Output VOH Undershoot (VOHV) at VCC = 3.3 V, TA = 25°C | > 2 V | V |
| Package Types | TSSOP, SOIC, SSOP, QFN, etc. | |
| ESD Protection | 2000-V Human-Body Model, 1000-V Charged-Device Model |
Key Features
- Operates from 1.65 V to 3.6 V.
- Inputs accept voltages up to 5.5 V.
- Specified from –40°C to +85°C and –40°C to +125°C.
- Supports mixed-mode signal operation on all ports (5-V input or output voltage with 3.3-V VCC).
- Ioff supports live insertion, partial-power-down mode, and back-drive protection.
- Can be used as a down translator to translate inputs from a maximum of 5.5 V down to the VCC level.
- Available in ultra small logic QFN package (0.5 mm maximum height).
- Latch-up performance exceeds 250 mA per JESD 17.
- ESD protection exceeds JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model.
Applications
- Servers
- LED Displays
- Network Switches
- Telecom Infrastructure
- Motor Drivers
- I/O Expanders
Q & A
- What is the operating voltage range of the SN74LVC244A?
The SN74LVC244A operates from 1.65 V to 3.6 V. - What is the maximum input voltage the SN74LVC244A can accept?
The inputs can accept voltages up to 5.5 V. - What are the operating temperature ranges for the SN74LVC244A?
The device is specified from –40°C to +85°C and –40°C to +125°C. - What is the maximum propagation delay of the SN74LVC244A at 3.3 V?
The maximum propagation delay (tpd) at 3.3 V is 5.9 ns. - Does the SN74LVC244A support mixed-mode signal operation?
Yes, it supports mixed-mode signal operation on all ports (5-V input or output voltage with 3.3-V VCC). - What kind of ESD protection does the SN74LVC244A have?
The device has ESD protection exceeding JESD 22 – 2000-V Human-Body Model and 1000-V Charged-Device Model. - Can the SN74LVC244A be used as a down translator?
Yes, it can be used as a down translator to translate inputs from a maximum of 5.5 V down to the VCC level. - What are some common applications of the SN74LVC244A?
Common applications include servers, LED displays, network switches, telecom infrastructure, motor drivers, and I/O expanders. - What package types are available for the SN74LVC244A?
The device is available in various package types including TSSOP, SOIC, SSOP, QFN, and others. - How does the SN74LVC244A handle power-down modes?
The device supports live insertion, partial-power-down mode, and back-drive protection.
