CD4521B - CMOS 24 级分频器

CD4521B是TI德州仪器公司的一款比率乘法器/分频器/定时器产品，CD4521B是CMOS 24 级分频器，本站介绍了CD4521B的封装应用图解、特点和优点、功能等，并给出了与CD4521B相关的TI元器件型号供参考。

CD4521B - CMOS 24 级分频器 - 比率乘法器/分频器/定时器 - 特殊逻辑 - 德州仪器

产品描述

CD4521B consists of an oscillator section and 24 ripple-carry binary counter stages. The oscillator configuration (using IN1) allows design of either RC or crystal oscillator circuits. IN1 should be tied either HIGH or LOW when not in use. A HIGH on the RESET causes the counter to go to the all-0’s state and disables the oscillator. The count is advanced on the negative transition of IN1 (and IN2). A time-saving test mode is described in the Functional Test Sequence Table and in Fig. 6.

The CD4521B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

产品特性

Reset disables the RC oscillator for low-power standby condition
VDD’ and VSS’ pins are brought out from the crystal oscillator to allow use of external resistors for low-power operation
Maximum input current of 1 µA at 18 V over full package-temperature range: 100 nA at 18 V and 25°C
Common reset
100% tested for 20-V quiescent current
5, 10 and 15 V parametric ratings
Standardized symmetrical output characteristics
Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"

Data sheet acquired from Harris Semiconductor

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