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Click here for more information74HCT123DB
Dual retriggerable monostable multivibrator with reset
The 74HC123; 74HCT123 is a dual retriggerable monostable multivibrator with reset. The basic output pulse width is programmed by selection of external components (REXT and CEXT). Once triggered this basic pulse width may be extended by retriggering either of the edge triggered inputs (nA or nB). By repeating this process, the output pulse period (nQ = HIGH, nQ = LOW) can be made as long as desired. Alternatively, an output delay can be terminated at any time by a LOW-going edge on input nRD. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.
Schmitt-trigger action in the nA and nB inputs, makes the circuit highly tolerant to slower input rise and fall times.
Alternatives
Features and benefits
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
Complies with JEDEC standards:
- JESD8C (2.7 V to 3.6 V)
- JESD7A (2.0 V to 6.0 V)
Input levels:
For 74HC123: CMOS level
For 74HCT123: TTL level
DC triggered from active HIGH or active LOW inputs
Retriggerable for very long pulses up to 100 % duty factor
Direct reset terminates output pulse
Schmitt-trigger action on all inputs except for the reset input
ESD protection:
HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
Multiple package options
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
PCB Symbol, Footprint and 3D Model
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封装
下表中的所有产品型号均已停产 。
型号 | 可订购的器件编号,(订购码(12NC)) | 状态 | 标示 | 封装 | 外形图 | 回流焊/波峰焊 | 包装 |
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74HCT123DB | 74HCT123DB,112 (935186840112) |
Obsolete | no package information | ||||
74HCT123DB,118 (935186840118) |
Obsolete |
环境信息
下表中的所有产品型号均已停产 。
型号 | 可订购的器件编号 | 化学成分 | RoHS | RHF指示符 |
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74HCT123DB | 74HCT123DB,112 | 74HCT123DB |
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74HCT123DB | 74HCT123DB,118 | 74HCT123DB |
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Series
文档 (4)
文件名称 | 标题 | 类型 | 日期 |
---|---|---|---|
74HC_HCT123 | Dual retriggerable monostable multivibrator with reset | Data sheet | 2024-02-21 |
AN11044 | Pin FMEA 74HC/74HCT family | Application note | 2019-01-09 |
hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
HCT_USER_GUIDE | HC/T User Guide | User manual | 1997-10-31 |
支持
如果您需要设计/技术支持,请告知我们并填写 应答表 我们会尽快回复您。
模型
文件名称 | 标题 | 类型 | 日期 |
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hc | HC/HCT Spice model | SPICE model | 2022-02-17 |
PCB Symbol, Footprint and 3D Model
Model Name | 描述 |
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How does it work?
The interactive datasheets are based on the Nexperia MOSFET precision electrothermal models. With our interactive datasheets you can simply specify your own conditions interactively. Start by changing the values of the conditions. You can do this by using the sliders in the condition fields. By dragging the sliders you will see how the MOSFET will perform at the new conditions set.