Overview
The SN74AHC245PWRE4 is an octal bus transceiver with 3-state outputs, designed by Texas Instruments. This component is part of the SN74AHC245 series and is packaged in a 20-pin TSSOP (Thin Shrink Small Outline Package). It is optimized for asynchronous two-way communication between data buses, making it versatile for various digital systems.
The device operates within a voltage range of 2V to 5.5V, ensuring compatibility with a wide range of digital circuits. It features high latch-up performance and is suitable for use in safety-critical applications, adhering to standards such as MIL-PRF-38535.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Supply Voltage Range) | –0.5 | 7 | V | |
| VI (Input Voltage Range) | –0.5 | 7 | V | |
| VO (Output Voltage Range) | –0.5 | VCC + 0.5 | V | |
| IOH (Continuous Output Current) | ±25 | mA | ||
| ICC (Continuous Current through VCC or GND) | ±75 | mA | ||
| Tstg (Storage Temperature Range) | –65 | 150 | °C | |
| RθJA (Junction-to-Ambient Thermal Resistance) | 122.3 | °C/W | ||
| tPLH (Propagation Delay Time, A or B to B or A) | 4 | 5.5 | 6.5 | ns |
Key Features
- Operating voltage range: 2V to 5.5V
- High latch-up performance exceeding 250mA per JESD 17
- 3-state outputs for bus driving or signal isolation
- Direction control pin (DIR) for data direction control
- Output enable pin (OE) for output control
- Low power consumption and high speed operation
- Available in various packages including TSSOP, SSOP, TVSOP, SOIC, PDIP, VSSOP, and VQFN
Applications
- Servers and data centers
- PCs and notebooks
- Network switches and routers
- Wearable health and fitness devices
- Telecom infrastructures
- Electronic points of sale (POS) systems
Q & A
- What is the operating voltage range of the SN74AHC245PWRE4?
The operating voltage range is from 2V to 5.5V.
- What is the purpose of the DIR pin in the SN74AHC245PWRE4?
The DIR pin controls the direction of data flow between the A and B buses.
- What is the function of the OE pin in the SN74AHC245PWRE4?
The OE pin is used to enable or disable the outputs of the device.
- What are the thermal resistance values for the TSSOP package?
The junction-to-ambient thermal resistance (RθJA) is approximately 122.3°C/W.
- What is the maximum continuous output current for the SN74AHC245PWRE4?
The maximum continuous output current is ±25 mA.
- What are the storage temperature limits for the SN74AHC245PWRE4?
The storage temperature range is from –65°C to 150°C.
- Can the SN74AHC245PWRE4 be used in safety-critical applications?
- What are some common applications of the SN74AHC245PWRE4?
Common applications include servers, PCs, network switches, wearable devices, telecom infrastructures, and electronic POS systems.
- What is the propagation delay time for the SN74AHC245PWRE4 at VCC = 5V?
The propagation delay time (tPLH) is approximately 4 to 6.5 ns.
- What are the available package options for the SN74AHC245 series?
The SN74AHC245 series is available in TSSOP, SSOP, TVSOP, SOIC, PDIP, VSSOP, and VQFN packages.
