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74AHCT123APW ECAD models PCB Symbol, Footprint & ECAD Model

Dual retriggerable monostable multivibrator with reset

The 74AHC123A; 74AHCT123A are high-speed Si-gate CMOS devices and are pin compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74AHC123A; 74AHCT123A are dual retriggerable monostable multivibrators with output pulse width control by three methods. The basic pulse time is programmed by selection of an external resistor (REXT) and capacitor (CEXT).

Once triggered, the basic output pulse width may be extended by retriggering the gated active LOW-going edge input (nA) or the active HIGH-going edge input (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, which also inhibits the triggering.

An internal connection from nRD to the input gate makes it possible to trigger the circuit by a positive-going signal at input nRD. The basic output pulse width is essentially determined by the value of the external timing components REXT and CEXT. When CEXT ≥ 10 nF, the typical output pulse width is defined as: tW= REXT× CEXT where tW= pulse width in ns; REXT= external resistor in kΩ; CEXT= external capacitor in pF. Schmitt-trigger action at all inputs makes the circuit highly tolerant to slower input rise and fall times.

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
74AHCT123APW 74AHCT123APW,118 935265562118 SOT403-1 订单产品
74AHCT123APW 74AHCT123APW,112 935265562112 SOT403-1 订单产品

特性

  • All inputs have a Schmitt-trigger action
  • Inputs accept voltages higher than VCC
  • DC triggered from active HIGH or active LOW inputs
  • Retriggerable for very long pulses up to 100 % duty factor
  • Direct reset terminates output pulse
  • For 74AHC123A only: operates with CMOS input levels
  • For 74AHCT123A only: operates with TTL input levels
  • ESD protection:
    • HBM JESD22-A114E exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 1000 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)Rth(j-c) (K/W)Package name
74AHCT123APWProduction4.5 - 5.5TTL± 85.0low-40~1251264.855.7TSSOP16

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
74AHCT123APW74AHCT123APW,118
( 9352 655 62118 )
ActiveAHT123A
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74AHCT123APW,112
( 9352 655 62112 )
ActiveAHT123ABulk 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 / RHFEFRIFRMTBF(小时)MSLMSL无铅
74AHCT123APW74AHCT123APW,11874AHCT123APW84.96.621.51E811
74AHCT123APW74AHCT123APW,11274AHCT123APW84.96.621.51E811
品质及可靠性免责声明

文档 (6)

文件名称标题类型日期
74AHC_AHCT123ADual retriggerable monostable multivibrator with resetData sheet2017-05-04
AN11106Pin FMEA for AHC/AHCT familyApplication note2019-01-09
ahct123aahct123a IBIS modelIBIS model2013-04-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_118TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-08
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-11-14

支持

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模型

文件名称标题类型日期
ahct123aahct123a IBIS modelIBIS model2013-04-08

订购、定价与供货

型号Orderable part numberOrdering code (12NC)包装在线购买
74AHCT123APW74AHCT123APW,118935265562118Reel 13" Q1/T1订单产品
74AHCT123APW74AHCT123APW,112935265562112Bulk Pack订单产品

样品

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