參數(shù)資料
型號: HEF40192BT
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: 4-bit up/down decade counter
中文描述: 4000/14000/40000 SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL DECADE COUNTER, PDSO16
封裝: PLASTIC, SOT-108, SO-14
文件頁數(shù): 5/9頁
文件大小: 129K
代理商: HEF40192BT
January 1995
5
Philips Semiconductors
Product specification
4-bit up/down decade counter
HEF40192B
MSI
FUNCTION TABLE
MR
PL
CP
U
X
X
CP
D
X
X
MODE
H
L
X
L
reset (asyn.)
parallel load
L
H
H
count-up
L
H
H
count-down
Notes
1.
H = HIGH state (the more positive voltage)
L = LOW state (the less positive voltage)
X = state is immaterial
= positive-going transition
Fig.5 State diagram.
Logic equations for terminal count:
TC
U
O
0
O
3
CP
U
=
TC
D
O
0
O
1
O
2
O
3
CP
D
=
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
550 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
2400 f
i
+ ∑
(f
o
C
L
)
×
V
DD2
6500 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
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