Overview
The 74HCT123DB,118 is a dual retriggerable monostable multivibrator with reset, manufactured by Nexperia USA Inc. This integrated circuit is part of the 74HC/74HCT family and is designed to generate a single pulse of a fixed duration in response to a trigger signal. The output pulse width can be programmed using external components (REXT and CEXT), and the pulse can be extended by retriggering the edge-triggered inputs. The device also features a direct reset input to terminate the output pulse at any time.
Key Specifications
| Parameter | Value |
|---|---|
| Type Number | 74HCT123DB |
| Package | SSOP16 (SOT338-1) |
| Supply Voltage Range | 2.0 V to 6.0 V |
| Input Levels | TTL level |
| Trigger Type | Edge-triggered from active HIGH or active LOW inputs |
| Pulse Width | Programmable using REXT and CEXT |
| Reset Input | Direct reset terminates output pulse |
| ESD Protection | HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V, CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V |
| Operating Temperature Range | -40 °C to +85 °C and -40 °C to +125 °C |
Key Features
- Wide supply voltage range from 2.0 V to 6.0 V
- CMOS low power dissipation
- High noise immunity
- Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
- Schmitt-trigger action on all inputs except for the reset input
- Retriggerable for very long pulses up to 100 % duty factor
- Multiple package options
- Complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V)
Applications
The 74HCT123DB,118 is versatile and can be used in various applications, including:
- Timing and pulse generation circuits
- Automotive electronics for safety and efficiency enhancements
- Industrial control systems requiring precise timing and pulse control
- Consumer electronics where low power consumption and high noise immunity are crucial
- Medical devices that require reliable and precise timing signals
Q & A
- What is the 74HCT123DB,118 used for?
The 74HCT123DB,118 is used as a dual retriggerable monostable multivibrator with reset, generating a single pulse of a fixed duration in response to a trigger signal. - What is the supply voltage range of the 74HCT123DB,118?
The supply voltage range is from 2.0 V to 6.0 V. - What type of input levels does the 74HCT123DB,118 support?
The 74HCT123DB,118 supports TTL input levels. - How can the output pulse width be programmed?
The output pulse width can be programmed using external components (REXT and CEXT). - What is the purpose of the reset input?
The reset input terminates the output pulse at any time. - Does the 74HCT123DB,118 have ESD protection?
Yes, it has ESD protection: HBM exceeds 2000 V and CDM exceeds 1000 V. - What are the operating temperature ranges for the 74HCT123DB,118?
The operating temperature ranges are -40 °C to +85 °C and -40 °C to +125 °C. - Is the 74HCT123DB,118 compliant with JEDEC standards?
Yes, it complies with JEDEC standards: JESD8C (2.7 V to 3.6 V) and JESD7A (2.0 V to 6.0 V). - What package options are available for the 74HCT123DB,118?
The device is available in SSOP16 (SOT338-1) package. - Is the 74HCT123DB,118 suitable for high noise environments?
Yes, it has high noise immunity.
