Overview
The 74LVC244AD,118 is an octal non-inverting buffer/line driver with 3-state outputs, manufactured by Nexperia USA Inc. This device is part of the 74LVC244A and 74LVCH244A series, which are designed to operate as 8-bit buffers or as two 4-bit buffers. The 3-state outputs are controlled by two output enable inputs (1OE and 2OE), allowing the outputs to assume a high-impedance OFF-state when the output enable is HIGH. This feature makes the device versatile for use in mixed 3.3 V and 5 V environments.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VCC (supply voltage) | Functional | 1.2 | - | 3.6 | V |
| VI (input voltage) | - | 0 | - | 5.5 | V |
| VO (output voltage) | - | 0 | - | VCC | V |
| Tamb (ambient temperature) | - | -40 | - | 125 | °C |
| Δt/ΔV (input transition rise and fall rate) | VCC = 1.2 V to 2.7 V | 0 | - | 20 | ns/V |
| Δt/ΔV (input transition rise and fall rate) | VCC = 2.7 V to 3.6 V | 0 | - | 10 | ns/V |
| tpd (propagation delay) | VCC = 1.65 V to 1.95 V | 1.5 | 6.4 | 13.7 | ns |
| tpd (propagation delay) | VCC = 2.3 V to 2.7 V | 1.0 | 3.4 | 7.1 | ns |
| tpd (propagation delay) | VCC = 2.7 V to 3.6 V | 1.5 | 3.4 | 6.9 | ns |
Key Features
- 5 V tolerant inputs/outputs for interfacing with 5 V logic
- Wide supply voltage range from 1.2 V to 3.6 V
- CMOS low-power consumption
- Direct interface with TTL levels
- Inputs accept voltages up to 5.5 V
- High-impedance when VCC = 0 V
- Bus hold on all data inputs (74LVCH244A only)
- Complies with JEDEC standards: JESD8-7A, JESD8-5A, JESD8-C/JESD36
- ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115B exceeds 200 V, CDM JESD22-C101E exceeds 1000 V
- Schmitt-trigger action at all inputs for tolerance of slower input rise and fall times
- IOFF circuitry for partial power-down mode operation
Applications
The 74LVC244AD,118 is versatile and can be used in a variety of applications across different industries, including:
- Automotive systems: For signal buffering and level translation in automotive electronics.
- Industrial control systems: To interface between different voltage levels and to buffer signals.
- Consumer electronics: In devices requiring low-power consumption and high reliability.
- Mobile and wearable devices: For signal translation and buffering in mixed voltage environments.
- Computing and power systems: To ensure reliable signal transmission and level translation.
Q & A
- What is the primary function of the 74LVC244AD,118?
The primary function is to act as an octal non-inverting buffer/line driver with 3-state outputs.
- What is the supply voltage range for the 74LVC244AD,118?
The supply voltage range is from 1.2 V to 3.6 V.
- Can the 74LVC244AD,118 be used in mixed 3.3 V and 5 V environments?
- What is the significance of the Schmitt-trigger action in the 74LVC244AD,118?
The Schmitt-trigger action makes the circuit tolerant of slower input rise and fall times.
- What is the IOFF circuitry used for in the 74LVC244AD,118?
The IOFF circuitry provides partial power-down mode operation, preventing backflow current when the device is powered down.
- Does the 74LVC244AD,118 have ESD protection?
- What is the operating temperature range for the 74LVC244AD,118?
The operating temperature range is from -40 °C to +125 °C.
- Can the 74LVC244AD,118 be used in automotive applications?
- How are the 3-state outputs controlled in the 74LVC244AD,118?
The 3-state outputs are controlled by the output enable inputs 1OE and 2OE.
- Does the 74LVC244AD,118 require external pull-up resistors for unused inputs?
No, the 74LVCH244A version has bus hold on all data inputs, eliminating the need for external pull-up resistors.
