Overview
The SNJ54LS374FK is an octal D-type edge-triggered flip-flop with 3-state outputs, manufactured by Texas Instruments. This component is part of the SN54LS374 series and is packaged in a 20-pin Leadless Chip Carrier (LCCC) package. It is designed for high-reliability applications, including military and space environments, and operates over a wide temperature range of -55°C to 125°C.
The device features eight edge-triggered D-type flip-flops, each with 3-state outputs that can drive highly capacitive or low-impedance loads directly without the need for additional interface components. This makes it suitable for various applications such as buffer registers, I/O ports, bidirectional bus drivers, and working registers.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | SNJ54LS374FK |
| Package Type | LCCC (Leadless Chip Carrier) |
| Pins | 20 |
| Operating Temperature Range | -55°C to 125°C |
| Bits | 8 |
| Maximum Clock Frequency | 35 MHz |
| Maximum ICC at Nominal Voltage | 40 mA |
| Input Type | TTL (Transistor-Transistor Logic) |
| Output Drive (IOL/IOH) | 24/-2.6 mA |
| Output Type | TTL |
| VCC Range | 4.75 V to 5.25 V |
| Propagation Delay Time (tpd) | 28 ns |
Key Features
- Choice of Eight Latches or Eight D-Type Flip-Flops: The SNJ54LS374FK can be used as either eight transparent D-type latches or eight edge-triggered D-type flip-flops.
- 3-State Bus-Driving Outputs: The device features 3-state outputs that can drive highly capacitive or relatively low-impedance loads directly.
- Full Parallel Access for Loading: All eight flip-flops or latches can be loaded in parallel.
- Buffered Control Inputs: The control inputs are buffered to improve noise rejection.
- Clock-Enable Input with Hysteresis: The clock-enable input has hysteresis to improve noise rejection.
- P-N-P Inputs: The inputs are P-N-P type, reducing DC loading on data lines.
- High-Impedance State: The outputs can be placed in a high-impedance state, which does not load or drive the bus lines significantly.
Applications
The SNJ54LS374FK is versatile and can be used in various applications, including:
- Buffer Registers: For buffering data in digital systems.
- I/O Ports: As part of input/output interfaces in microprocessor systems.
- Bidirectional Bus Drivers: For driving and receiving data on bidirectional buses.
- Working Registers: In digital circuits where temporary data storage is required.
- Military and Space Applications: Due to its high reliability and wide operating temperature range.
Q & A
- What is the part number of this component?
The part number is SNJ54LS374FK.
- Who is the manufacturer of this component?
The manufacturer is Texas Instruments.
- What is the package type of the SNJ54LS374FK?
The package type is Leadless Chip Carrier (LCCC) with 20 pins.
- What is the operating temperature range of the SNJ54LS374FK?
The operating temperature range is -55°C to 125°C.
- How many bits does the SNJ54LS374FK have?
The device has 8 bits.
- What is the maximum clock frequency of the SNJ54LS374FK?
The maximum clock frequency is 35 MHz.
- What type of inputs does the SNJ54LS374FK have?
The inputs are TTL (Transistor-Transistor Logic) type.
- Can the outputs of the SNJ54LS374FK be placed in a high-impedance state?
Yes, the outputs can be placed in a high-impedance state.
- What is the typical propagation delay time of the SNJ54LS374FK?
The typical propagation delay time (tpd) is 28 ns.
- What are some common applications of the SNJ54LS374FK?
Common applications include buffer registers, I/O ports, bidirectional bus drivers, and working registers.
