CD4516B - CMOS 可预设置的二进制加/减计数器

CD4516B是TI德州仪器公司的一款计数器/算术/奇偶校验功能产品，CD4516B是CMOS 可预设置的二进制加/减计数器，本站介绍了CD4516B的封装应用图解、特点和优点、功能等，并给出了与CD4516B相关的TI元器件型号供参考。

CD4516B - CMOS 可预设置的二进制加/减计数器 - 计数器/算术/奇偶校验功能 - 特殊逻辑 - 德州仪器

产品描述

CD4510B Presettable BCD Up/Down Counter and the CD4516 Presettable Binary Up/Down Counter consist of four synchronously clocked D-type flip-flops (with a gating structure to provide T-type flip-flop capability) connected as counters. These counters can be cleared by a high level on the RESET line, and can be preset to any binary number present on the jam inputs by a high level on the PRESET ENABLE line. The CD4510B will count out of non-BCD counter states in a maximum of two clock pulses in the up mode, and a maximum of four clock pulses in the down mode.

If the CARRY-IN input is held low, the counter advances up or down on each positive-going clock transition. Synchronous cascading is accomplished by connecting all clock inputs in parallel and connecting the CARRY-OUT of a less significant stage to the CARRY-IN of a more significant stage.

The CD4510B and CD4516B can be cascaded in the ripple mode by connecting the CARRY-OUT to the clock of the next stage. If the UP/DOWN input changes during a terminal count, the CARRY-OUT must be gated with the clock, and the UP/DOWN input must change while the clock is high. This method provides a clean clock signal to the subsequent counting stage. (See Fig.15).

These devices are similar to types MC14510 and MC14516.

The CD4510B and CD4516B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (NSR suffix), and 16-lead thin shrink small-outline packages (PW and PWR suffixes). The CD4516B types also are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix).

产品特性

Medium-speed operation - fCL = 8 NHz typ. at 10 V
Synchronous internal carry propagation
Reset and Preset capability
100% tested for quiescent current at 20 V
5-V, 10-V, and 15-V parametric ratings
Standardized, symmetrical output characteristics
Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
Noise margin (full package-temperature range) = 1 V at VDD = 5 V 2 V at VDD = 10 V 2.5 V at VDD = 15 V
Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"
Applications:
- Up/Down difference counting
- Multistage synchronous counting
- Multistage ripple counting
- Synchronous frequency dividers

CD4510B ---BCD Type CD4516B ---Binary Type

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