CD4033 Decade Counter with 7-Segment Decoder
A versatile IC for driving numerical displays with low power dissipation.
- Part number: CD4033B
- Technology Family: CD4000
- VCC (Min): 3V
- VCC (Max): 18V
- Bits (#): 7
- Voltage (Nom): 5, 10, 15V
- F @ nom voltage (Max): 8MHz
- ICC @ nom voltage (Max): 0.03mA
- tpd @ nom Voltage (Max): 250ns
- IOL (Max): 1.5mA
- IOH (Max): -1.5mA
- Function: Counter
- Type: Decade
- Operating temperature range (C): -55 to 125
- Package Group: PDIP|16
Top Features:
- Counter and 7-segment decoding in one package
- Easily interfaced with 7-segment display types
- Fully static counter operation: DC to 6 MHz at VDD = 10V
- Ideal for low-power displays
CD4033 consists of a 5-stage Johnson decade counter and an output decoder which converts the Johnson code to a 7-segment decoded output for driving one stage in a numerical display. The device is advantageous in display applications where low power dissipation and/or low package count are important.
Inputs common to both types are CLOCK, RESET, & CLOCK INHIBIT; common outputs are CARRY OUT and the seven decoded outputs (a, b, c, d, e, f, g). Signals peculiar to the CD4033 are RIPPLE-BLANKING INPUT AND LAMP TEST INPUT and a RIPPLE-BLANKING OUTPUT.
A high RESET signal clears the decade counter to its zero count. The counter is advanced one count at the positive clock signal transition if the CLOCK INHIBIT signal is low. Counter advancement via the clock line is inhibited when the CLOCK INHIBIT signal is high. The CLOCK INHIBIT signal can be used as a negative-edge clock if the clock line is held high.
Anti lock gating is provided on the JOHNSON counter, assuring proper counting sequence. The CARRY-OUT (Cout) signal completes one cycle every ten CLOCK INPUT cycles and is used to clock the succeeding decade directly in a multi-decade counting chain.
The seven decoded outputs (a, b, c, d, e, f, g) illuminate the proper segments in a seven segment display device used for representing the decimal numbers 0 to 9. The 7-segment outputs go high on selection in the CD4033.
The CD4033 series 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).
Applications include decade counting, 7-segment decimal display, frequency division, clocks, watches, timers, and counter/display driver for meter applications.
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*Images are for illustration only; actual product may vary.