Overview
The SN74LVC827A, produced by Texas Instruments, is a 10-bit buffer/bus driver designed for high-performance bus interface applications. This device operates over a wide voltage range from 1.65 V to 3.6 V, making it versatile for various system environments. It features 3-state outputs controlled by a 2-input AND gate with active-low inputs, ensuring that the outputs are in a high-impedance state when either output-enable input is high. The SN74LVC827A supports mixed-mode signal operation, allowing inputs to be driven from either 3.3-V or 5-V devices, which is particularly useful in mixed-voltage systems.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage Range) | 1.65 | - | 3.6 | V |
| VI (Input Voltage Range) | -0.5 | - | 6.5 | V |
| VO (Output Voltage Range in High or Low State) | -0.5 | - | VCC + 0.5 | V |
| IOH (High-Level Output Current) | -4 | - | -24 | mA |
| IOL (Low-Level Output Current) | 4 | - | 24 | mA |
| tpd (Propagation Delay Time) | 5.5 | - | 7.9 | ns |
| TA (Operating Free-Air Temperature) | -40 | - | 125 | °C |
Key Features
- Operates from 1.65 V to 3.6 V supply voltage range.
- Inputs accept voltages up to 5.5 V, allowing for down voltage translation.
- 3-state outputs controlled by a 2-input AND gate with active-low inputs.
- Ioff feature supports live insertion, partial-power-down mode, and back-drive protection.
- ESD protection exceeds JESD 22 standards (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model).
- Latch-up performance exceeds 250 mA per JESD 17.
- Typical VOLP (Output Ground Bounce) < 0.8 V and VOHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C.
- Supports mixed-mode signal operation on all ports (5-V input/output voltage with 3.3-V VCC).
Applications
- LED Displays
- Network Switches
- Telecom Infrastructure
- Servers
- Motor Drivers
- I/O Expanders
- High-speed bus interface applications where data needs to be retained.
Q & A
- What is the operating voltage range of the SN74LVC827A?
The SN74LVC827A operates from 1.65 V to 3.6 V.
- What is the maximum input voltage that the SN74LVC827A can accept?
The inputs can accept voltages up to 5.5 V.
- How are the 3-state outputs controlled in the SN74LVC827A?
The 3-state outputs are controlled by a 2-input AND gate with active-low inputs.
- What is the Ioff feature in the SN74LVC827A?
The Ioff feature supports live insertion, partial-power-down mode, and back-drive protection.
- What are the ESD protection ratings for the SN74LVC827A?
The device has ESD protection exceeding JESD 22 standards (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model).
- What is the latch-up performance of the SN74LVC827A?
The latch-up performance exceeds 250 mA per JESD 17.
- What are the typical output ground bounce and overshoot values for the SN74LVC827A?
Typical VOLP (Output Ground Bounce) < 0.8 V and VOHV (Output VOH Undershoot) > 2 V at VCC = 3.3 V, TA = 25°C.
- Can the SN74LVC827A be used in mixed-voltage systems?
Yes, it supports mixed-mode signal operation on all ports (5-V input/output voltage with 3.3-V VCC).
- What are some common applications for the SN74LVC827A?
Common applications include LED displays, network switches, telecom infrastructure, servers, motor drivers, and I/O expanders.
- What is the maximum propagation delay time for the SN74LVC827A?
The maximum propagation delay time (tpd) is approximately 7.9 ns.
