Overview
The SN74HC365DR is a hex buffer and line driver integrated circuit produced by Texas Instruments. This device is part of the HC365 series and is designed to enhance the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. It contains six independent buffers with 3-state outputs, making it versatile for various digital logic applications.
Key Specifications
| Parameter | Unit | Min | Max | |
|---|---|---|---|---|
| VCC (Supply Voltage) | V | 2 | 5 | 6 |
| VIH (High-level Input Voltage) | V | 1.5 (VCC=2V) | 3.15 (VCC=4.5V) | 4.2 (VCC=6V) |
| VIL (Low-level Input Voltage) | V | 0.5 (VCC=2V) | 1.35 (VCC=4.5V) | 1.8 (VCC=6V) |
| VOH (Output High Voltage) | V | 1.9 (IOH=-20μA, VCC=2V) | 4.4 (IOH=-20μA, VCC=4.5V) | 5.9 (IOH=-20μA, VCC=6V) |
| VOL (Output Low Voltage) | V | 0.1 (IOL=20μA, VCC=2V) | 0.1 (IOL=20μA, VCC=4.5V) | 0.1 (IOL=20μA, VCC=6V) |
| ICC (Quiescent Current) | μA | 8 | - | 160 |
| tpd (Propagation Delay) | ns | 50 (VCC=2V) | 12 (VCC=4.5V) | 10 (VCC=6V) |
| ten (Enable Time) | ns | 100 (VCC=2V) | 26 (VCC=4.5V) | 21 (VCC=6V) |
| tdis (Disable Time) | ns | 50 (VCC=2V) | 21 (VCC=4.5V) | 19 (VCC=6V) |
| tt (Transition Time) | ns | 28 (VCC=2V) | 8 (VCC=4.5V) | 6 (VCC=6V) |
| TA (Operating Temperature) | °C | -40 | - | 85 |
Key Features
- Wide operating voltage range of 2 V to 6 V
- High-current 3-state outputs capable of driving bus lines, buffer-memory address registers, or up to 15 LSTTL loads
- True outputs
- Low power consumption, with a maximum ICC of 80 μA
- Typical propagation delay of 10 ns
- ±6-mA output drive at 5V
- Low input current of 1 μA max
- Dual-gated output-enable (OE1 and OE2) inputs for flexible control
Applications
- 3-state memory address drivers
- Clock drivers
- Bus-oriented receivers and transmitters
- General-purpose digital logic circuits requiring high-current drive and low power consumption
Q & A
- What is the operating voltage range of the SN74HC365DR?
The operating voltage range is from 2 V to 6 V.
- How many independent buffers does the SN74HC365DR contain?
The device contains six independent buffers.
- What is the maximum propagation delay of the SN74HC365DR at 5V?
The typical propagation delay is 12 ns, with a maximum of 19 ns at 5V.
- What is the output drive capability of the SN74HC365DR at 5V?
The device can drive up to ±6 mA at 5V.
- What is the quiescent current consumption of the SN74HC365DR?
The maximum quiescent current (ICC) is 80 μA.
- How do the output-enable inputs (OE1 and OE2) function?
When both OE1 and OE2 are low, the device passes noninverted data from the A inputs to the Y outputs. If either or both output-enable terminals are high, the outputs are in the high-impedance state.
- What is the recommended bypass capacitor for the power supply?
A 0.1-μF capacitor is recommended, and it is acceptable to parallel multiple bypass caps to reject different frequencies of noise.
- What are the package options available for the SN74HC365DR?
The device is available in SOIC (D), PDIP (N), SOP (NS), and TSSOP (PW) packages.
- What is the operating temperature range of the SN74HC365DR?
The operating temperature range is from -40°C to 85°C.
- Why is it important not to leave unused inputs floating?
Unused inputs must be connected to a logic high or logic low voltage to prevent undefined operational states.
