Overview
The 74LVC245ADB/S400118 is an 8-bit bus transceiver with 3-state outputs, manufactured by NXP USA Inc. and now supported by Nexperia. This device is designed to facilitate bidirectional data transmission between two buses and features an output enable (OE) and a direction control (DIR) pin. The OE pin allows the outputs to be set to a high-impedance OFF-state when HIGH, while the DIR pin controls the direction of data flow. This transceiver is particularly useful in mixed 3.3 V and 5 V environments due to its ability to interface with both voltage levels.
Key Specifications
| Parameter | Value |
|---|---|
| Type | Octal bus transceiver; 3-state |
| Supply Voltage Range | 1.2 V to 3.6 V |
| Input Voltage Range | Up to 5.5 V |
| Operating Temperature Range | -40 °C to +85 °C and -40 °C to +125 °C |
| Package Type | SSOP20 (SOT339-1) |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
| Compliance | JESD8-7A (1.65 V to 1.95 V), JESD8-5A (2.3 V to 2.7 V), JESD8-C/JESD36 (2.7 V to 3.6 V) |
Key Features
- Wide supply voltage range from 1.2 V to 3.6 V
- CMOS low-power consumption
- Direct interface with TTL levels
- Overvoltage tolerant inputs up to 5.5 V
- Bus hold on all data inputs (for 74LVCH245A)
- IOFF circuitry for partial power-down mode operation
- Schmitt-trigger action at all inputs for improved noise immunity
Applications
The 74LVC245ADB/S400118 is suitable for a variety of applications, including:
- Mixed 3.3 V and 5 V environments where voltage translation is necessary
- Partial power-down applications where IOFF circuitry is beneficial
- Systems requiring low-power CMOS logic
- Applications needing high ESD protection and noise immunity
Q & A
- What is the primary function of the 74LVC245ADB/S400118? The primary function is to act as an 8-bit bus transceiver with 3-state outputs, enabling bidirectional data transmission between two buses.
- What is the supply voltage range for this device? The supply voltage range is from 1.2 V to 3.6 V.
- Can this device handle mixed voltage environments? Yes, it can interface with both 3.3 V and 5 V devices.
- What is the purpose of the OE and DIR pins? The OE pin sets the outputs to a high-impedance state when HIGH, and the DIR pin controls the direction of data flow.
- What is the operating temperature range of this device? The operating temperature range is -40 °C to +85 °C and -40 °C to +125 °C.
- What type of package does this device come in? It comes in an SSOP20 (SOT339-1) package.
- Does this device have ESD protection? Yes, it has HBM and CDM ESD protection exceeding 2000 V and 1000 V respectively.
- What compliance standards does this device meet? It complies with JESD8-7A, JESD8-5A, and JESD8-C/JESD36 standards.
- What is the benefit of the IOFF circuitry? The IOFF circuitry allows for partial power-down mode operation, preventing backflow current when the device is powered down.
- Why is Schmitt-trigger action important in this device? Schmitt-trigger action improves noise immunity by making the circuit tolerant of slower input rise and fall times.
