4520.yaml

---
description: "Dual 4-bit synchronous binary counter"
package:     DIP
pincount:    16
family:      "4000"
datasheet:   "http://www.standardics.nxp.com/products/hef/datasheet/hef4520b.pdf"
pins:
  - num:  1
    sym:  1CP0
    desc: counter 1 clock input (low-to-high triggered)
  - num:  2
    sym:  1~CP~1
    desc: counter 1 clock input (high-to-low triggered)
  - num:  3
    sym:  1Q0
    desc: counter 1 output
  - num:  4
    sym:  1Q1
    desc: counter 1 output
  - num:  5
    sym:  1Q2
    desc: counter 1 output
  - num:  6
    sym:  1Q3
    desc: counter 1 output
  - num:  7
    sym:  1MR
    desc: counter 1 master reset (active high)
  - num:  8
    sym:  GND
    desc: ground
  - num:  9
    sym:  2CP0
    desc: counter 2 clock input (low-to-high triggered)
  - num:  10
    sym:  2~CP~1
    desc: counter 2 clock input (high-to-low triggered)
  - num:  11
    sym:  2Q0
    desc: counter 2 output
  - num:  12
    sym:  2Q1
    desc: counter 2 output
  - num:  13
    sym:  2Q2
    desc: counter 2 output
  - num:  14
    sym:  2Q3
    desc: counter 2 output
  - num:  15
    sym:  2MR
    desc: counter 2 master reset (active high)
  - num:  16
    sym:  Vcc
    desc: supply voltage
notes:
  - The 4520 counts from 0 to 15. The 4518 is identical but counts from 0 to 9.
  - Either nCP0 or n~CP~1 may be used as the clock input; the other can be used as a clock enable input.
  - If n~CP~1 is high, the counter advances on a low-to-high transition of nCP0.
  - If nCP0 is low, the counter advances on a high-to-low transition of n~CP~1.
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