HEF4516B Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

HEF4516B

Binary up/down counter

Philips Electronics 

Philips Semiconductors

Binary up/down counter

FUNCTION TABLE

MR PL UP/DN CE

L

H

X

X

L

L

X

H

L

L

L

L

L

L

H

L

H

X

X

X

CP

MODE

X parallel load

X no change

count down

count up

X reset

Notes

1. H = HIGH state (the more positive voltage)

L = LOW state (the less positive voltage)

X = state is immaterial

= positive-going transition

Product specification

HEF4516B

MSI

Fig.5 State diagram.

Logic equation for terminal count:

TC

=

CE ⋅

{ (UP/DN)

⋅

O0

⋅

O1

⋅

O2

⋅

O

3

+





U

P

/

D

N

⋅ O0 ⋅ O1 ⋅ O2 ⋅ O3}

AC CHARACTERISTICS

VSS = 0 V; Tamb = 25 °C; input transition times ≤ 20 ns

Dynamic power

dissipation per

package (P)

VDD

V

TYPICAL FORMULA FOR P (µW)

5

1000 fi + ∑ (foCL) × VDD2

where

10

4500 fi + ∑ (foCL) × VDD2

fi = input freq. (MHz)

15

11 200 fi + ∑ (foCL) × VDD2

fo = output freq. (MHz)

CL = load capacitance (pF)

∑ (foCL) = sum of outputs

VDD = supply voltage (V)

January 1995

5

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