Overview
The SN74HC652DW, produced by Texas Instruments, is an octal bus transceiver and register with 3-state outputs. This device is designed for multiplexed transmission of data directly from the data bus or from internal storage registers. It features bus-transceiver circuits, D-type flip-flops, and control circuitry, making it versatile for various bus-management functions.
The device supports real-time and stored data transfer, with select-control inputs to choose between these modes. It also includes output-enable inputs to control the transceiver functions, ensuring efficient data handling and storage.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2 V to 6 V | V |
| Operating Temperature Range | -40°C to 85°C | °C |
| Package Type | SOIC (DW) | - |
| Number of Pins | 24 | - |
| Maximum ICC (Power Consumption) | 80 µA | µA |
| Typical Propagation Delay (tpd) | 11 ns | ns |
| Output Drive at 5 V | ±6 mA | mA |
| Maximum Input Current | 1 µA | µA |
| Clock Frequency | Up to 36 MHz at 6 V | MHz |
Key Features
- Wide Operating Voltage Range of 2 V to 6 V
- High-Current 3-State Outputs Can Drive Up To 15 LSTTL Loads
- Low Power Consumption, 80-µA Max ICC
- Typical Propagation Delay of 11 ns
- ±6-mA Output Drive at 5 V
- Low Input Current of 1 µA Max
- Independent Registers and Enables for A and B Buses
- Multiplexed Real-Time and Stored Data Transfer
- True Data Paths
Applications
The SN74HC652DW is suitable for a variety of applications where bus management and data transmission are critical. These include:
- Computer Systems: For managing data buses and ensuring efficient data transfer.
- Embedded Systems: Where real-time and stored data handling is necessary.
- Industrial Control Systems: To manage and transmit data across different bus lines.
- Telecommunication Equipment: For reliable and efficient data transmission.
Q & A
- What is the operating voltage range of the SN74HC652DW?
The operating voltage range is from 2 V to 6 V.
- What is the maximum power consumption of the SN74HC652DW?
The maximum power consumption is 80 µA.
- How many LSTTL loads can the 3-state outputs drive?
The 3-state outputs can drive up to 15 LSTTL loads.
- What is the typical propagation delay of the SN74HC652DW?
The typical propagation delay is 11 ns.
- What is the output drive capability at 5 V?
The output drive capability at 5 V is ±6 mA.
- How do the select-control inputs function?
The select-control inputs (SAB and SBA) select between real-time and stored data transfer. A low input level selects real-time data, and a high input level selects stored data.
- What is the purpose of the output-enable inputs?
The output-enable inputs (OEAB and OEBA) control the transceiver functions, enabling or disabling the outputs.
- How can data be stored in the internal D-type flip-flops?
Data can be stored in the internal D-type flip-flops by low-to-high transitions at the appropriate clock (CLKAB or CLKBA) terminals.
- What is the recommended way to ensure high-impedance state during power up or power down?
To ensure the high-impedance state, OEBA should be tied to VCC through a pullup resistor, and OEAB should be tied to GND through a pulldown resistor.
- What is the maximum clock frequency at 6 V?
The maximum clock frequency at 6 V is up to 36 MHz.
