Overview
The 74HC123D,652, produced by Nexperia USA Inc., is a dual retriggerable monostable multivibrator with reset. This integrated circuit is part of the 74HC series and is designed to provide flexible timing and pulse generation capabilities. The device features two independent monostable multivibrators, each capable of generating a pulse width that can be programmed using external resistors and capacitors. The multivibrators can be triggered by either rising or falling edges on the input signals and can be reset at any time by a LOW-going edge on the reset input.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package Type | 16-SOIC (0.154, 3.90mm Width) | |
| Number of Pins | 16 | |
| Logic Function | Dual Monostable Multivibrator | |
| Propagation Delay | 65 ns | ns |
| Supply Voltage | 2.0 V to 6.0 V | V |
| Quiescent Current | 8 μA | μA |
| Mounting Type | Surface Mount | |
| RoHS Compliance | Yes |
Key Features
- Dual retriggerable monostable multivibrator with reset, allowing for flexible pulse width programming and extension.
- Schmitt-trigger action on inputs (nA and nB) for high noise immunity and tolerance to slower input rise and fall times.
- Wide supply voltage range from 2.0 V to 6.0 V, making it suitable for various applications.
- CMOS low power dissipation, reducing energy consumption.
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B, ensuring robust operation.
- Inputs include clamp diodes, enabling the use of current limiting resistors to interface inputs to voltages in excess of VCC.
- Complies with JEDEC standards for input levels (CMOS level for 74HC123 and TTL level for 74HCT123).
Applications
The 74HC123D,652 is versatile and can be used in a variety of applications across different industries, including:
- Automotive systems: For timing and pulse generation in automotive electronics.
- Industrial control systems: To provide timing signals and pulse widths in industrial automation.
- Consumer electronics: In devices requiring precise timing and pulse generation, such as audio equipment and consumer appliances.
- Computing and networking: For clocking and timing in computer peripherals and network devices.
- Medical devices: Where precise timing and pulse generation are critical.
Q & A
- What is the primary function of the 74HC123D,652?
The primary function is to act as a dual retriggerable monostable multivibrator with reset, generating programmable pulse widths.
- What is the package type of the 74HC123D,652?
The package type is 16-SOIC (0.154, 3.90mm Width).
- What is the supply voltage range for the 74HC123D,652?
The supply voltage range is from 2.0 V to 6.0 V.
- How is the pulse width programmed in the 74HC123D,652?
The pulse width is programmed using external resistors and capacitors.
- What is the propagation delay of the 74HC123D,652?
The propagation delay is 65 ns.
- Is the 74HC123D,652 RoHS compliant?
Yes, the 74HC123D,652 is RoHS compliant.
- What are the input levels for the 74HC123 and 74HCT123?
The input levels are CMOS for 74HC123 and TTL for 74HCT123.
- How can the output pulse period be extended in the 74HC123D,652?
The output pulse period can be extended by retriggering either of the edge-triggered inputs (nA or nB).
- Can the output delay be terminated at any time in the 74HC123D,652?
Yes, the output delay can be terminated at any time by a LOW-going edge on the reset input (nRD).
- What is the quiescent current of the 74HC123D,652?
The quiescent current is 8 μA.
