CD4518 Dual BCD Up-Counter and CD4520 Dual Binary Up-Counter each consist of two identical, internally synchronous 4-stage counters. The counter stages are D-type flip-flops having interchangeable CLOCK and ENABLE lines for incrementing on either the positive-going or negative-going transition. For single-unit operation the ENABLE input is maintained high and the counter advances on each positive-going transition of the CLOCK. The counters are cleared by high levels on their RESET lines.

The counter can be cascaded in the ripple mode by connecting Q4 to the enable input of the subsequent counter while the CLOCK input of the latter is held low.

The CD4518B and CD4520B types are supplied in 16-lead hermetic dual-in-line ceramic packages (F3A suffix), 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

• Medium-speed operation - 6-MHz typical clock frequency at 10 V
• Positive- or negative-edge triggering
• Synchronous internal carry propagation
• 100% tested for quiescent current at 20 V
• Maximum input current of 1 μA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
• Noise margin (over full package-temperature range):
  • 1 V at VDD = 5 V
  • 2 V at VDD = 10 V
  • 2.5 V at VDD = 15 V
• 5-V, 10-V, 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"
• Applications
  • Multistage synchronous counting
  • Multistage ripple counting
  • Frequency dividers

Data sheet acquired from Harris Semiconductor.

• Function
• Counter
• Bits (#)
• 4
• 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

CD4520B的完整型号有：CD4520BE、CD4520BM、CD4520BM96、CD4520BNSR、CD4520BPW、CD4520BPWR，以下是这些产品的关键参数及官网采购报价：

CD4520BE，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CD4520BE的批量USD价格：.143（1000+）

CD4520BM，工作温度：-55 to 125，封装：SOIC (D)-16，包装数量MPQ：40个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD4520BM的批量USD价格：.317（1000+）

CD4520BM96，工作温度：-55 to 125，封装：SOIC (D)-16，包装数量MPQ：2500个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD4520BM96的批量USD价格：.117（1000+）

CD4520BNSR，工作温度：-55 to 125，封装：SO (NS)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD4520BNSR的批量USD价格：.133（1000+）

CD4520BPW，工作温度：-55 to 125，封装：TSSOP (PW)-16，包装数量MPQ：90个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD4520BPW的批量USD价格：.317（1000+）

CD4520BPWR，工作温度：-55 to 125，封装：TSSOP (PW)-16，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网CD4520BPWR的批量USD价格：.117（1000+）

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。