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74HCT4538PW

Dual retriggerable precision monostable multivibrator

The 74HCT4538 is a dual retriggerable-resettable monostable multivibrator. Each multivibrator has two trigger/retrigger inputs (nA and nB), a direct reset input (nCD), two complementary outputs (nQ and nQ), and two pins (nREXT/CEXT and nCEXT) for connecting the external timing components CEXT and REXT. Typical pulse width variation over temperature range is ± 0.2 %. The device may be triggered by either the positive or the negative edges of the input pulse. The duration and accuracy of the output pulse are determined by the external timing components CEXT and REXT. The output pulse width (TW) is equal to 0.7 × REXT × CEXT. The linear design techniques guarantee precise control of the output pulse width. A LOW level at nCD terminates the output pulse immediately. Schmitt-trigger action in the trigger inputs makes the circuit highly tolerant to slower rise and fall times. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Features and benefits

  • Tolerant of slow trigger rise and fall times

  • High noise immunity

  • Separate reset inputs

  • Triggering from falling or rising edge

  • Complies with JEDEC standard no. 7A

  • Wide supply voltage range from 4.5 to 5.5 V

  • CMOS low power dissipation

  • TTL input levels

  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

  • ESD protection:

    • HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V

    • CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V

  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

参数类型

型号 Product status VCC (V) Logic switching levels Output drive capability (mA) tpd (ns) Power dissipation considerations Tamb (°C) Rth(j-a) (K/W) Ψth(j-top) (K/W) Rth(j-c) (K/W) Package name
74HCT4538PW Production 4.5 - 5.5 TTL ± 4 30 low -40~125 109 1.0 37 TSSOP16

PCB Symbol, Footprint and 3D Model

Model Name 描述

封装

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
74HCT4538PW 74HCT4538PW,118
(935189140118)
Active HCT4538 SOT403-1
TSSOP16
(SOT403-1)
SOT403-1 SSOP-TSSOP-VSO-WAVE
SOT403-1_118

环境信息

型号 可订购的器件编号 化学成分 RoHS RHF指示符
74HCT4538PW 74HCT4538PW,118 74HCT4538PW rohs rhf rhf
品质及可靠性免责声明

文档 (12)

文件名称 标题 类型 日期
74HCT4538 Dual retriggerable precision monostable multivibrator Data sheet 2024-03-26
AN11044 Pin FMEA 74HC/74HCT family Application note 2019-01-09
SOT403-1 3D model for products with SOT403-1 package Design support 2020-01-22
Nexperia_package_poster Nexperia package poster Leaflet 2020-05-15
TSSOP16_SOT403-1_mk plastic, thin shrink small outline package; 16 leads; 0.65 mm pitch; 5 mm x 4.4 mm x 1.1 mm body Marcom graphics 2017-01-28
SOT403-1_118 TSSOP16; Reel pack for SMD, 13"; Q1/T1 product orientation Packing information 2020-04-21
74HCT4538PW_Nexperia_Product_Reliability 74HCT4538PW Nexperia Product Reliability Quality document 2023-05-29
hc HC/HCT Spice model SPICE model 2022-02-17
HCT_USER_GUIDE HC/T User Guide User manual 1997-10-31
SSOP-TSSOP-VSO-WAVE Footprint for wave soldering Wave soldering 2009-10-08

支持

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模型

文件名称 标题 类型 日期
hc HC/HCT Spice model SPICE model 2022-02-17
SOT403-1 3D model for products with SOT403-1 package Design support 2020-01-22

PCB Symbol, Footprint and 3D Model

Model Name 描述

订购、定价与供货

型号 Orderable part number Ordering code (12NC) 状态 包装 Packing Quantity 在线购买
74HCT4538PW 74HCT4538PW,118 935189140118 Active SOT403-1_118 2,500 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。

如果您尚未取得安世半导体的直接采购帐号,我们的全球与区域经销网络可以协助您取得样品。

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.

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
74HCT4538PW 74HCT4538PW,118 935189140118 SOT403-1 订单产品