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CD4045B的基本参数
  • 制造厂商:TI
  • 产品类别:逻辑和电压转换
  • 技术类目:触发器、锁存器和寄存器 - 计数器
  • 功能描述:CMOS 21 级计数器
  • 点击这里打开及下载CD4045B的技术文档资料
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CD4045B的产品详情:

CD4045B is a timing circuit consisting of 21 counter stages, two output-shaping flip-flops, two inverter output drivers, and input inverters for use in a crystal oscillator. The CD4045B configuration provides 21 flip-flop counting stages, and two flip-flops for shaping the output waveform for a 3.125% duty cycle. Push-pull operation is provided by the inverter output drivers.

The first inverter is intended for use as a crystal oscillator/amplifier. However, it may be used as a normal logic inverter if desired. A crystal oscillator circuit can be made less sensitive to voltage-supply variations by the user of source resistors. In this device, the sources of the p and n transistors have been brought out to package terminals. If external resistors are not required, the sources must be shorted to their respective substrates (Sp to VDD, Sn to VSS). See Fig. 1. The first inverter in conjunction with an outboard inverter, such as 1/6 CD4069, and RX, CX, and RS can also be used to construct an RC oscillator. The following data is supplied as a guide in the selection of values for RX, RS, and CX used in Fig. 11:

  1. RX max = 10 M and CX = 50 pF
  2. CX max = 25 µF with RS = 560 k

The CD4045B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline package (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

CD4045B的优势和特性:
  • Very low operating dissipation . . . . . <1 mW (typ.) @ VDD = 5 V, f = 1 MHz
  • Output drivers with sink or source capability . . . . . 7 mA (typ.) @ VDD = 5 V
  • Medium speed (typ.) . . . f = 25 MHz @ VDD = 10 V
  • 100% tested for quiescent current at 20 V
  • 5-V, 10-V, and 15-V parametric ratings
  • Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"
  • Applications
    • Digital equipment in which ultra-low dissipation and/or operation using a battery source is required.
    • Accurate timing from a crystal oscillator for timing applications such as wall clocks, table clocks, automobile clocks, and digital timing references in any circuit requiring accurately timed outputs at various intervals in the counting sequence.
    • Driving miniature synchronous motors, stepping motors, or external bipolar transistors in push-pull fashion.

CD4045B的参数(英文):
  • Function
  • Counter
  • Bits (#)
  • 2
  • Technology Family
  • CD4000
  • Supply voltage (Min) (V)
  • 3
  • Supply voltage (Max) (V)
  • 18
  • Input type
  • Standard CMOS
  • Output type
  • Push-Pull
  • Features
  • Balanced outputs, Standard speed (tpd > 50ns), Positive input clamp diode
CD4045B具体的完整产品型号参数及价格(美元):

CD4045B的完整型号有:CD4045BE,以下是这些产品的关键参数及官网采购报价:

CD4045BE,工作温度:-55 to 125,封装:PDIP (N)-16,包装数量MPQ:25个,MSL 等级/回流焊峰值温度:N/A for Pkg Type,引脚镀层/焊球材料:NIPDAU,TI官网CD4045BE的批量USD价格:.131(1000+)

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CD4045B的评估套件:

14-24-LOGIC-EVM — 支持 14 到 24 引脚 PW、DB、D、DW、NS、DYY 和 DGV 封装的通用逻辑 EVM

该 EVM 设计用于支持采用 14 至 24 引脚 D、DW、DB、NS、PW、DYY 或 DGV 封装的任何逻辑器件。

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