參數資料
型號: 933324320652
廠商: NXP SEMICONDUCTORS
元件分類: 計數器
英文描述: 4000/14000/40000 SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDIP16
封裝: PLASTIC, SOT-38-1, DIP-16
文件頁數: 6/8頁
文件大?。?/td> 126K
代理商: 933324320652
January 1995
5
Philips Semiconductors
Product specication
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
H
X
parallel load
L
X
H
X
no change
L
count down
L
H
L
count up
H
X
reset
Fig.5 State diagram.
Logic equation for terminal count:
AC CHARACTERISTICS
VSS = 0 V; Tamb =25 °C; input transition times ≤ 20 ns
VDD
V
TYPICAL FORMULA FOR P (
W)
Dynamic power
5
1000 fi +∑ (foCL) × VDD2
where
dissipation per
10
4500 fi +∑ (foCL) × VDD2
fi = input freq. (MHz)
package (P)
15
11 200 fi +∑ (foCL) × VDD2
fo = output freq. (MHz)
CL = load capacitance (pF)
∑ (f
oCL) = sum of outputs
VDD = supply voltage (V)
TC
CE
UP/DN
() O
0
O
1
O
2
O
3
UP/DN
O0 O1 O2 O3
+
{}
=
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