Catalog
CMOS Dual Binary Up-Counter
Key Features
• Medium-speed operation -6-MHz typical clock frequency at 10 VPositive- or negative-edge triggeringSynchronous internal carry propagation100% tested for quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (over full package-temperature range):1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsStandardized, symmetrical output characteristicsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"ApplicationsMultistage synchronous countingMultistage ripple countingFrequency dividersData sheet acquired from Harris Semiconductor.Medium-speed operation -6-MHz typical clock frequency at 10 VPositive- or negative-edge triggeringSynchronous internal carry propagation100% tested for quiescent current at 20 VMaximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°CNoise margin (over full package-temperature range):1 V at VDD= 5 V2 V at VDD= 10 V2.5 V at VDD= 15 V5-V, 10-V, and 15-V parametric ratingsStandardized, symmetrical output characteristicsMeets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of ’B’ Series CMOS Devices"ApplicationsMultistage synchronous countingMultistage ripple countingFrequency dividersData sheet acquired from Harris Semiconductor.
Description
AI
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).
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).
