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74HCT123DB

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.

不建议用在新设计中(NRND)。

可订购部件

型号 可订购的器件编号 订购代码(12NC) 封装 从经销商处购买
74HCT123DB 74HCT123DB,118 935186840118 SOT338-1 订单产品
74HCT123DB 74HCT123DB,112 935186840112 SOT338-1 订单产品

特性

  • 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 JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

目标应用

参数类型

型号Product statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Package name
74HCT123DB
NRND
Not for design in4.5 - 5.5TTL+/- 426low-40~12514842.0SSOP16

Package

型号可订购的器件编号,(订购码(12NC))状态标示封装尺寸版本回流焊/波峰焊包装
74HCT123DB
NRND
74HCT123DB,118
( 9351 868 40118 )
ActiveHCT123
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HCT123DB,112
( 9351 868 40112 )
ActiveHCT123Bulk Pack

品质、可靠性及化学成分

型号可订购的器件编号化学成分RoHS / RHFMSLMSL无铅
74HCT123DB
NRND
74HCT123DB,11874HCT123DB11
74HCT123DB
NRND
74HCT123DB,11274HCT123DB11
品质及可靠性免责声明

文档 (6)

文件名称标题类型日期
74HC_HCT123Dual retriggerable monostable multivibrator with resetData sheet2020-09-15
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08

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
hchc Spice modelSPICE model2013-05-06

订购、定价与供货

型号Orderable part numberOrdering code (12NC)包装在线购买
74HCT123DB74HCT123DB,118935186840118Reel 13" Q1/T1订单产品
74HCT123DB74HCT123DB,112935186840112Bulk Pack订单产品

样品

安世半导体客户可通过我们的销售机构或直接通过在线样品商店订购样品: https://extranet.nexperia.com.

样品订单通常需要2-4天寄送时间。

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