Overview
The SN74HC373NSR is an octal transparent D-type latch integrated circuit produced by Texas Instruments. This component features 3-state outputs, making it suitable for driving highly capacitive or relatively low-impedance loads. The device is particularly useful for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The eight latches of the SN74HC373 are transparent D-type latches, meaning that while the latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the D inputs.
Key Specifications
| Specification | Value |
|---|---|
| Operating Voltage Range | 2 V to 6 V |
| Output Drive | ±6 mA at 5 V |
| Input Current | 1 µA max |
| Power Consumption (ICC) | 80 µA max |
| Propagation Delay (tpd) | 13 ns typical |
| Operating Temperature Range | -40°C to 85°C |
| Package Type | 20-pin SO (NS) |
| Number of Latches | 8 |
| Load Capability | Up to 15 LSTTL loads |
Key Features
- Wide operating voltage range of 2 V to 6 V
- High-current 3-state true outputs can drive up to 15 LSTTL loads
- Low power consumption, 80 µA max ICC
- Typical propagation delay of 13 ns
- ±6 mA output drive at 5 V
- Low input current of 1 µA max
- Eight high-current latches in a single package
- Full parallel access for loading
Applications
The SN74HC373NSR is particularly suitable for various applications, including:
- Implementing buffer registers
- I/O ports
- Bidirectional bus drivers
- Working registers
Q & A
- What is the operating voltage range of the SN74HC373NSR?
The operating voltage range is 2 V to 6 V. - How many latches are included in the SN74HC373NSR?
The device includes eight high-current latches. - What is the typical propagation delay of the SN74HC373NSR?
The typical propagation delay is 13 ns. - What is the maximum power consumption of the SN74HC373NSR?
The maximum power consumption (ICC) is 80 µA. - What is the output drive capability of the SN74HC373NSR at 5 V?
The output drive capability is ±6 mA at 5 V. - What is the operating temperature range of the SN74HC373NSR?
The operating temperature range is -40°C to 85°C. - What type of package does the SN74HC373NSR come in?
The device comes in a 20-pin SO (NS) package. - Can the SN74HC373NSR drive highly capacitive loads?
Yes, the SN74HC373NSR is designed to drive highly capacitive or relatively low-impedance loads. - What is the function of the latch-enable (LE) input?
While the LE input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels set up at the D inputs. - What is the purpose of the output-enable (OE) input?
The OE input places the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state.
