Overview
The SN74HC373NG4, produced by Texas Instruments, is an octal transparent D-type latch with 3-state outputs. This integrated circuit is designed to operate within a wide voltage range of 2 V to 6 V, making it versatile for various applications. The device features eight high-current latches in a single package, which are particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | 2 | - | 6 | V |
| Operating Free-Air Temperature | -40 | - | 85 | °C |
| Input Clamp Current (IIK) | -20 | - | 20 | mA |
| Output Clamp Current (IOK) | -20 | - | 20 | mA |
| Input Voltage (VI) | 0 | - | VCC | V |
| Output Voltage (VO) | 0 | - | VCC | V |
| Propagation Delay Time (tpd) | 13 | - | - | ns |
| Output Drive at 5 V | ±6 | - | - | mA |
| Low Input Current | 1 | - | - | µA |
| Power Consumption (ICC) | - | 80 | - | µA |
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 time (tpd) 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 SN74HC373 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 SN74HC373?
The operating voltage range is 2 V to 6 V.
- How many latches are included in the SN74HC373?
The device includes eight high-current latches.
- What is the typical propagation delay time (tpd) of the SN74HC373?
The typical propagation delay time is 13 ns.
- What is the maximum output drive at 5 V?
The maximum output drive at 5 V is ±6 mA.
- What is the maximum low input current?
The maximum low input current is 1 µA.
- What are some common applications of the SN74HC373?
Common applications include implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
- What is the power consumption of the SN74HC373?
The maximum power consumption (ICC) is 80 µA.
- How does the latch-enable (LE) input function?
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 that were set up at the D inputs.
- What are the thermal characteristics of the SN74HC373?
The junction-to-ambient thermal resistance varies by package type, with values such as 109.1 °C/W for the SOIC package.
- What are the available package types for the SN74HC373?
Available package types include PDIP, SOIC, SSOP, TSSOP, CDIP, CFP, LCCC, and others.
