參數(shù)資料
型號(hào): HEF4516B
廠商: NXP Semiconductors N.V.
元件分類: 通用總線功能
英文描述: Binary up/down counter(二進(jìn)制加/減計(jì)數(shù)器)
中文描述: 二進(jìn)制加/減計(jì)數(shù)器(二進(jìn)制加/減計(jì)數(shù)器)
文件頁數(shù): 5/10頁
文件大?。?/td> 129K
代理商: HEF4516B
January 1995
5
Philips Semiconductors
Product specification
Binary up/down counter
HEF4516B
MSI
FUNCTION TABLE
Notes
1.
H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
MR
PL
UP/DN
CE
CP
MODE
L
L
L
H
L
L
X
X
L
X
H
L
X
X
parallel load
no change
count down
L
L
H
L
count up
H
X
X
X
X
reset
Fig.5 State diagram.
Logic equation for terminal count:
AC CHARACTERISTICS
V
SS
= 0 V; T
amb
= 25
°
C; input transition times
20 ns
V
DD
V
TYPICAL FORMULA FOR P (
μ
W)
Dynamic power
dissipation per
package (P)
5
1000 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
4500 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
11 200 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
where
f
i
= input freq. (MHz)
f
o
= output freq. (MHz)
C
L
= load capacitance (pF)
(f
o
C
L
) = sum of outputs
V
DD
= supply voltage (V)
10
15
TC
CE
UP/DN
(
)
O
0
O
1
O
2
O
3
UP/DN
O
0
O
1
O
2
O
3
+
{
}
=
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