Overview
The SN74HC245PWRE4, produced by Texas Instruments, is an octal bus transceiver with 3-state outputs. This device is designed to facilitate bidirectional data transmission between two buses, A and B, under the control of a direction-control input (DIR) and an output-enable input (OE). It operates within a wide voltage range of 2 V to 6 V, making it versatile for various applications. The SN74HC245PWRE4 is available in a 20-pin TSSOP package and is RoHS compliant.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | 5 | 6 | V |
| VIH High-Level Input Voltage (VCC = 2 V) | 1.5 | 1.5 | V | |
| VIL Low-Level Input Voltage (VCC = 2 V) | 0.5 | 0.5 | V | |
| IO Continuous Output Current | ±35 | mA | ||
| Tstg Storage Temperature | -65 | 150 | °C | |
| TJ Junction Temperature | 150 | °C | ||
| TA Operating Free-Air Temperature | -40 | 85 | °C | |
| tpd Propagation Delay Time (A or B to A or B) | 12 | 18 | 27 | ns (at VCC = 6 V) |
Key Features
- Wide operating voltage range of 2 V to 6 V, allowing for flexibility in different system designs.
- High-current 3-state outputs capable of driving bus lines directly or up to 15 LSTTL loads.
- Low power consumption with a maximum ICC of 80 µA.
- Fast propagation delay times, with a typical tpd of 12 ns at VCC = 6 V.
- High output drive capability of ±6 mA at 5 V.
- Low input current of 1 µA maximum.
- Output enable (OE) input to isolate the buses when not in use.
- Direction-control (DIR) input to control the direction of data transmission between the A and B buses.
Applications
- Bus-oriented systems where data needs to be transmitted bidirectionally.
- Microprocessor and memory systems requiring data transfer between different buses.
- Peripheral devices and interfaces that need to communicate with the main system bus.
- Industrial control systems and automation where reliable and fast data transmission is crucial.
- Embedded systems and IoT devices that require efficient and low-power data communication.
Q & A
- What is the operating voltage range of the SN74HC245PWRE4?
The operating voltage range is from 2 V to 6 V.
- What is the purpose of the DIR input in the SN74HC245PWRE4?
The DIR input controls the direction of data transmission between the A and B buses.
- How does the OE input function in the SN74HC245PWRE4?
The OE input can be used to disable the device, effectively isolating the buses when not in use.
- What is the maximum propagation delay time for the SN74HC245PWRE4 at VCC = 6 V?
The maximum propagation delay time is 27 ns.
- Is the SN74HC245PWRE4 RoHS compliant?
Yes, the SN74HC245PWRE4 is RoHS compliant.
- What is the package type and pin count of the SN74HC245PWRE4?
The device is packaged in a 20-pin TSSOP.
- What is the maximum output current of the SN74HC245PWRE4?
The maximum continuous output current is ±35 mA.
- What is the storage temperature range for the SN74HC245PWRE4?
The storage temperature range is from -65°C to 150°C.
- What is the typical power consumption of the SN74HC245PWRE4?
The typical power consumption is 80 µA maximum.
- Can the SN74HC245PWRE4 drive LSTTL loads?
Yes, it can drive up to 15 LSTTL loads.
