DATA SHEET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF40192B
MSI
4-bit up/down decade counter
For a complete data sheet, please also download:
The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
January 1995
2
Philips Semiconductors
Product specification
4-bit up/down decade counter
HEF40192B
MSI
DESCRIPTION
The HEF40192B is a 4-bit synchronous up/down decade
counter. The counter has a count-up clock input (CP
U
), a
count-down clock input (CP
D
), an asynchronous parallel
load input (PL), four parallel data inputs (P
0
to P
3
), an
asynchronous master reset input (MR), four counter
outputs (O
0
to O
3
), an active LOW terminal count-up
(carry) output (TC
U
) and an active LOW terminal
count-down (borrow) output (TC
D
).
The counter outputs change state on the LOW to HIGH
transition of either clock input. However, for correct
counting, both clock inputs cannot be LOW
simultaneously. The outputs TC
U
and TC
D
are normally
HIGH. When the circuit has reached the maximum count
state of `9', the next HIGH to LOW transition of CP
U
will
cause TC
U
to go LOW. TC
U
will stay LOW until CP
U
goes
HIGH again. Likewise, output TC
D
will go LOW when the
circuit is in the zero state and CP
D
goes LOW. When PL is
LOW, the information on P
0
to P
3
is asynchronously
loaded into the counter. A HIGH on MR resets the counter
independent of all other input conditions. The counter
stages are of a static toggle type flip-flop.
Fig.1 Functional diagram.
HEF40192BP(N): 16-lead DIL; plastic
(SOT38-1)
HEF40192BD(F):
16-lead DIL; ceramic (cerdip)
(SOT74)
HEF40192BT(D):
16-lead SO; plastic
(SOT109-1)
( ): Package Designator North America
Fig.2 Pinning diagram.
PINNING
PL
parallel load input (active LOW)
P
0
to P
3
parallel data inputs
CP
U
count-up clock pulse input (LOW to HIGH,
edge-triggered)
CP
D
count-down clock pulse input (LOW to
HIGH, edge-triggered)
MR
master reset input (asynchronous)
TC
U
buffered terminal count-up (carry) output
(active LOW)
TC
D
buffered terminal count-down
(borrow) output (active LOW)
O
0
to O
3
buffered counter outputs
FAMILY DATA, I
DD
LIMITS category MSI
See Family Specifications
January 1995
5
Philips Semiconductors
Product specification
4-bit up/down decade counter
HEF40192B
MSI
FUNCTION TABLE
MR
PL
CP
U
CP
D
MODE
H
X
X
X
reset (asyn.)
L
L
X
X
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 (
W)
Dynamic power
5
550 f
i
+
(f
o
C
L
)
V
DD
2
where
dissipation per
10
2400 f
i
+
(f
o
C
L
)
V
DD
2
f
i
= input freq. (MHz)
package (P)
15
6500 f
i
+
(f
o
C
L
)
V
DD
2
f
o
= output freq. (MHz)
C
L
= load capacitance (pF)
(f
o
C
L
) = sum of outputs
V
DD
= supply voltage (V)
January 1995
9
Philips Semiconductors
Product specification
4-bit up/down decade counter
HEF40192B
MSI
APPLICATION INFORMATION
Some examples of applications for the HEF40192B are:
Up/down difference counting
Multistage ripple counting
Multistage synchronous counting.
Fig.7 Timing diagram.
Fig.8 Example of cascaded HEF40192B ICs.
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