Overview
The 74HCT245DB,118 is an 8-bit transceiver with 3-state outputs, manufactured by Nexperia USA Inc. This device is part of the 74HC/HCT245 series, which are high-speed Si-gate CMOS devices that are pin compatible with low power Schottky TTL (LSTTL). The 74HCT245 is specifically designed to operate with TTL input levels, making it versatile for various digital circuit applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max |
|---|---|---|---|---|
| Input Voltage (VIH) | VCC = 4.5 V | 3.15 V | - | 4.5 V |
| Input Voltage (VIL) | VCC = 4.5 V | - | 1.35 V | 2.1 V |
| Output Voltage (VOH) | IO = -20 μA; VCC = 4.5 V | 4.4 V | 4.5 V | - |
| Propagation Delay (tPD) | - | - | 7.0 ns | - |
| Enable Time (OE to An or Bn) | - | - | 16 ns | 30 ns |
| Disable Time (OE to An or Bn) | - | - | 16 ns | 30 ns |
| Transition Time | VCC = 4.5 V | - | 5 ns | 12 ns |
| Operating Temperature | - | -40°C | - | 125°C |
| Package Type | - | - | - | SSOP20 (SOT339-1) |
Key Features
- Octal bidirectional bus interface with non-inverting 3-state outputs.
- Output enable (OE) and send/receive (DIR) for direction control.
- Complies with JEDEC standard JESD7A.
- Input levels: TTL level for 74HCT245.
- ESD protection: HBM JESD22-A114F exceeds 2000 V, MM JESD22-A115-A exceeds 200 V.
- Multiple package options: SSOP20, SO20, TSSOP20, and DHVQFN20.
- Specified from -40°C to +85°C and from -40°C to +125°C.
Applications
The 74HCT245DB,118 is suitable for a variety of digital circuit applications, including:
- Bus interface and data transmission systems.
- Microprocessor and microcontroller systems.
- Peripheral devices and interface circuits.
- High-speed digital logic circuits.
Q & A
- What is the primary function of the 74HCT245DB,118?
The primary function is to act as an 8-bit transceiver with 3-state outputs, enabling bidirectional data transmission between two buses. - What are the input voltage levels for the 74HCT245DB,118?
The input voltage levels are TTL compatible, with VIH typically at 3.15 V and VIL typically at 1.35 V when VCC is 4.5 V. - What is the propagation delay of the 74HCT245DB,118?
The propagation delay (tPD) is typically 7.0 ns. - What are the operating temperature ranges for the 74HCT245DB,118?
The device operates from -40°C to +125°C. - What package types are available for the 74HCT245DB,118?
The device is available in SSOP20, SO20, TSSOP20, and DHVQFN20 packages. - Does the 74HCT245DB,118 have ESD protection?
Yes, it has ESD protection with HBM JESD22-A114F exceeding 2000 V and MM JESD22-A115-A exceeding 200 V. - How does the output enable (OE) function work?
A HIGH on OE causes the outputs to assume a high-impedance OFF-state. - What is the significance of the send/receive (DIR) pin?
The DIR pin controls the direction of data transmission between the two buses. - Is the 74HCT245DB,118 compliant with any industry standards?
Yes, it complies with JEDEC standard JESD7A. - What are some common applications of the 74HCT245DB,118?
Common applications include bus interface and data transmission systems, microprocessor and microcontroller systems, and high-speed digital logic circuits.
